/***************************************************************************
qgsvectorlayer.cpp
This class implements a generic means to display vector layers. The features
and attributes are read from the data store using a "data provider" plugin.
QgsVectorLayer can be used with any data store for which an appropriate
plugin is available.
-------------------
begin : Oct 29, 2003
copyright : (C) 2003 by Gary E.Sherman
email : sherman at mrcc.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/* $Id$ */
#include <cfloat>
#include <cstring>
#include <climits>
#include <cmath>
#include <iosfwd>
#include <limits>
#include <memory>
#include <set>
#include <sstream>
#include <utility>
#include <QImage>
#include <QPainter>
#include <QPainterPath>
#include <QPolygonF>
#include <QSettings>
#include <QString>
#include <QDomNode>
#include "qgsvectorlayer.h"
// renderers
#include "qgscontinuouscolorrenderer.h"
#include "qgsgraduatedsymbolrenderer.h"
#include "qgsrenderer.h"
#include "qgssinglesymbolrenderer.h"
#include "qgsuniquevaluerenderer.h"
#include "qgsattributeaction.h"
#include "qgis.h" //for globals
#include "qgsapplication.h"
#include "qgscoordinatetransform.h"
#include "qgsfeature.h"
#include "qgsfield.h"
#include "qgsgeometry.h"
#include "qgslabel.h"
#include "qgslogger.h"
#include "qgsmaptopixel.h"
#include "qgspoint.h"
#include "qgsproviderregistry.h"
#include "qgsrectangle.h"
#include "qgsrendercontext.h"
#include "qgssinglesymbolrenderer.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayerundocommand.h"
#include "qgsvectoroverlay.h"
#include "qgsmaplayerregistry.h"
#include "qgsclipper.h"
#include "qgsproject.h"
#include "qgsrendererv2.h"
#include "qgssymbolv2.h"
#include "qgssymbollayerv2.h"
#include "qgssinglesymbolrendererv2.h"
#ifdef TESTPROVIDERLIB
#include <dlfcn.h>
#endif
static const char * const ident_ = "$Id$";
// typedef for the QgsDataProvider class factory
typedef QgsDataProvider * create_it( const QString* uri );
QgsVectorLayer::QgsVectorLayer( QString vectorLayerPath,
QString baseName,
QString providerKey,
bool loadDefaultStyleFlag )
: QgsMapLayer( VectorLayer, baseName, vectorLayerPath ),
mUpdateThreshold( 0 ), // XXX better default value?
mDataProvider( NULL ),
mProviderKey( providerKey ),
mEditable( false ),
mModified( false ),
mMaxUpdatedIndex( -1 ),
mActiveCommand( NULL ),
mRenderer( 0 ),
mRendererV2( NULL ),
mUsingRendererV2( false ),
mLabel( 0 ),
mLabelOn( false ),
mVertexMarkerOnlyForSelection( false ),
mFetching( false )
{
mActions = new QgsAttributeAction;
// if we're given a provider type, try to create and bind one to this layer
if ( ! mProviderKey.isEmpty() )
{
setDataProvider( mProviderKey );
}
if ( mValid )
{
// Always set crs
setCoordinateSystem();
QSettings settings;
if ( settings.value( "/qgis/use_symbology_ng", false ).toBool() )
{
// using symbology-ng!
setUsingRendererV2( true );
}
// check if there is a default style / propertysheet defined
// for this layer and if so apply it
bool defaultLoadedFlag = false;
if ( loadDefaultStyleFlag )
{
loadDefaultStyle( defaultLoadedFlag );
}
// if the default style failed to load or was disabled use some very basic defaults
if ( !defaultLoadedFlag )
{
// add single symbol renderer
if ( mUsingRendererV2 )
{
setRendererV2( QgsFeatureRendererV2::defaultRenderer( geometryType() ) );
}
else
{
QgsSingleSymbolRenderer *renderer = new QgsSingleSymbolRenderer( geometryType() );
setRenderer( renderer );
}
}
// Get the update threshold from user settings. We
// do this only on construction to avoid the penality of
// fetching this each time the layer is drawn. If the user
// changes the threshold from the preferences dialog, it will
// have no effect on existing layers
// TODO: load this setting somewhere else [MD]
//QSettings settings;
//mUpdateThreshold = settings.readNumEntry("Map/updateThreshold", 1000);
}
} // QgsVectorLayer ctor
QgsVectorLayer::~QgsVectorLayer()
{
QgsDebugMsg( "In QgsVectorLayer destructor" );
emit layerDeleted();
mValid = false;
if ( mRenderer )
{
delete mRenderer;
}
// delete the provider object
delete mDataProvider;
delete mLabel;
// Destroy any cached geometries and clear the references to them
deleteCachedGeometries();
delete mActions;
//delete remaining overlays
QList<QgsVectorOverlay*>::iterator overlayIt = mOverlays.begin();
for ( ; overlayIt != mOverlays.end(); ++overlayIt )
{
delete *overlayIt;
}
}
QString QgsVectorLayer::storageType() const
{
if ( mDataProvider )
{
return mDataProvider->storageType();
}
return 0;
}
QString QgsVectorLayer::capabilitiesString() const
{
if ( mDataProvider )
{
return mDataProvider->capabilitiesString();
}
return 0;
}
QString QgsVectorLayer::dataComment() const
{
if ( mDataProvider )
{
return mDataProvider->dataComment();
}
return QString();
}
QString QgsVectorLayer::providerType() const
{
return mProviderKey;
}
/**
* sets the preferred display field based on some fuzzy logic
*/
void QgsVectorLayer::setDisplayField( QString fldName )
{
// If fldName is provided, use it as the display field, otherwise
// determine the field index for the feature column of the identify
// dialog. We look for fields containing "name" first and second for
// fields containing "id". If neither are found, the first field
// is used as the node.
QString idxName = "";
QString idxId = "";
if ( !fldName.isEmpty() )
{
mDisplayField = fldName;
}
else
{
const QgsFieldMap &fields = pendingFields();
int fieldsSize = fields.size();
for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); ++it )
{
QString fldName = it.value().name();
QgsDebugMsg( "Checking field " + fldName + " of " + QString::number( fieldsSize ) + " total" );
// Check the fields and keep the first one that matches.
// We assume that the user has organized the data with the
// more "interesting" field names first. As such, name should
// be selected before oldname, othername, etc.
if ( fldName.indexOf( "name", false ) > -1 )
{
if ( idxName.isEmpty() )
{
idxName = fldName;
}
}
if ( fldName.indexOf( "descrip", false ) > -1 )
{
if ( idxName.isEmpty() )
{
idxName = fldName;
}
}
if ( fldName.indexOf( "id", false ) > -1 )
{
if ( idxId.isEmpty() )
{
idxId = fldName;
}
}
}
//if there were no fields in the dbf just return - otherwise qgis segfaults!
if ( fieldsSize == 0 )
return;
if ( idxName.length() > 0 )
{
mDisplayField = idxName;
}
else
{
if ( idxId.length() > 0 )
{
mDisplayField = idxId;
}
else
{
mDisplayField = fields[0].name();
}
}
}
}
// NOTE this is a temporary method added by Tim to prevent label clipping
// which was occurring when labeller was called in the main draw loop
// This method will probably be removed again in the near future!
void QgsVectorLayer::drawLabels( QgsRenderContext& rendererContext )
{
QgsDebugMsg( "Starting draw of labels" );
if (( mRenderer || mRendererV2 ) && mLabelOn &&
( !label()->scaleBasedVisibility() ||
( label()->minScale() <= rendererContext.rendererScale() &&
rendererContext.rendererScale() <= label()->maxScale() ) ) )
{
QgsAttributeList attributes;
if ( mRenderer )
{
attributes = mRenderer->classificationAttributes();
}
else if ( mRendererV2 )
{
foreach( QString attrName, mRendererV2->usedAttributes() )
{
int attrNum = fieldNameIndex( attrName );
attributes.append( attrNum );
}
// make sure the renderer is ready for classification ("symbolForFeature")
mRendererV2->startRender( rendererContext, this );
}
// Add fields required for labels
mLabel->addRequiredFields( attributes );
QgsDebugMsg( "Selecting features based on view extent" );
int featureCount = 0;
try
{
// select the records in the extent. The provider sets a spatial filter
// and sets up the selection set for retrieval
select( attributes, rendererContext.extent() );
QgsFeature fet;
while ( nextFeature( fet ) )
{
if (( mRenderer && mRenderer->willRenderFeature( &fet ) )
|| ( mRendererV2 && mRendererV2->symbolForFeature( fet ) != NULL ) )
{
bool sel = mSelectedFeatureIds.contains( fet.id() );
mLabel->renderLabel( rendererContext, fet, sel, 0 );
}
featureCount++;
}
}
catch ( QgsCsException &e )
{
Q_UNUSED( e );
QgsDebugMsg( "Error projecting label locations" );
}
if ( mRendererV2 )
{
mRendererV2->stopRender( rendererContext );
}
QgsDebugMsg( QString( "Total features processed %1" ).arg( featureCount ) );
// XXX Something in our draw event is triggering an additional draw event when resizing [TE 01/26/06]
// XXX Calling this will begin processing the next draw event causing image havoc and recursion crashes.
//qApp->processEvents();
}
}
unsigned char *QgsVectorLayer::drawLineString( unsigned char *feature, QgsRenderContext &renderContext )
{
QPainter *p = renderContext.painter();
unsigned char *ptr = feature + 5;
unsigned int wkbType = *(( int* )( feature + 1 ) );
unsigned int nPoints = *(( int* )ptr );
ptr = feature + 9;
bool hasZValue = ( wkbType == QGis::WKBLineString25D );
std::vector<double> x( nPoints );
std::vector<double> y( nPoints );
std::vector<double> z( nPoints, 0.0 );
// Extract the points from the WKB format into the x and y vectors.
for ( register unsigned int i = 0; i < nPoints; ++i )
{
x[i] = *(( double * ) ptr );
ptr += sizeof( double );
y[i] = *(( double * ) ptr );
ptr += sizeof( double );
if ( hasZValue ) // ignore Z value
ptr += sizeof( double );
}
// Transform the points into map coordinates (and reproject if
// necessary)
transformPoints( x, y, z, renderContext );
// Work around a +/- 32768 limitation on coordinates
// Look through the x and y coordinates and see if there are any
// that need trimming. If one is found, there's no need to look at
// the rest of them so end the loop at that point.
for ( register unsigned int i = 0; i < nPoints; ++i )
{
if ( std::abs( x[i] ) > QgsClipper::MAX_X ||
std::abs( y[i] ) > QgsClipper::MAX_Y )
{
QgsClipper::trimFeature( x, y, true ); // true = polyline
nPoints = x.size(); // trimming may change nPoints.
break;
}
}
// set up QPolygonF class with transformed points
QPolygonF pa( nPoints );
for ( register unsigned int i = 0; i < nPoints; ++i )
{
pa[i].setX( x[i] );
pa[i].setY( y[i] );
}
// The default pen gives bevelled joins between segements of the
// polyline, which is good enough for the moment.
//preserve a copy of the pen before we start fiddling with it
QPen pen = p->pen(); // to be kept original
//
// experimental alpha transparency
// 255 = opaque
//
QPen myTransparentPen = p->pen(); // store current pen
QColor myColor = myTransparentPen.color();
//only set transparency from layer level if renderer does not provide
//transparency on class level
if ( !mRenderer->usesTransparency() )
{
myColor.setAlpha( mTransparencyLevel );
}
myTransparentPen.setColor( myColor );
p->setPen( myTransparentPen );
p->drawPolyline( pa );
// draw vertex markers if in editing mode, but only to the main canvas
if ( mEditable && renderContext.drawEditingInformation() )
{
std::vector<double>::const_iterator xIt;
std::vector<double>::const_iterator yIt;
for ( xIt = x.begin(), yIt = y.begin(); xIt != x.end(); ++xIt, ++yIt )
{
drawVertexMarker( *xIt, *yIt, *p, mCurrentVertexMarkerType, mCurrentVertexMarkerSize );
}
}
//restore the pen
p->setPen( pen );
return ptr;
}
unsigned char *QgsVectorLayer::drawPolygon( unsigned char *feature, QgsRenderContext &renderContext )
{
QPainter *p = renderContext.painter();
typedef std::pair<std::vector<double>, std::vector<double> > ringType;
typedef ringType* ringTypePtr;
typedef std::vector<ringTypePtr> ringsType;
// get number of rings in the polygon
unsigned int numRings = *(( int* )( feature + 1 + sizeof( int ) ) );
if ( numRings == 0 ) // sanity check for zero rings in polygon
return feature + 9;
unsigned int wkbType = *(( int* )( feature + 1 ) );
bool hasZValue = ( wkbType == QGis::WKBPolygon25D );
int total_points = 0;
// A vector containing a pointer to a pair of double vectors.The
// first vector in the pair contains the x coordinates, and the
// second the y coordinates.
ringsType rings;
// Set pointer to the first ring
unsigned char* ptr = feature + 1 + 2 * sizeof( int );
for ( register unsigned int idx = 0; idx < numRings; idx++ )
{
unsigned int nPoints = *(( int* )ptr );
ringTypePtr ring = new ringType( std::vector<double>( nPoints ), std::vector<double>( nPoints ) );
ptr += 4;
// create a dummy vector for the z coordinate
std::vector<double> zVector( nPoints, 0.0 );
// Extract the points from the WKB and store in a pair of
// vectors.
for ( register unsigned int jdx = 0; jdx < nPoints; jdx++ )
{
ring->first[jdx] = *(( double * ) ptr );
ptr += sizeof( double );
ring->second[jdx] = *(( double * ) ptr );
ptr += sizeof( double );
if ( hasZValue )
ptr += sizeof( double );
}
// If ring has fewer than two points, what is it then?
// Anyway, this check prevents a crash
if ( nPoints < 1 )
{
QgsDebugMsg( "Ring has only " + QString::number( nPoints ) + " points! Skipping this ring." );
continue;
}
transformPoints( ring->first, ring->second, zVector, renderContext );
// Work around a +/- 32768 limitation on coordinates
// Look through the x and y coordinates and see if there are any
// that need trimming. If one is found, there's no need to look at
// the rest of them so end the loop at that point.
for ( register unsigned int i = 0; i < nPoints; ++i )
{
if ( std::abs( ring->first[i] ) > QgsClipper::MAX_X ||
std::abs( ring->second[i] ) > QgsClipper::MAX_Y )
{
QgsClipper::trimFeature( ring->first, ring->second, false );
break;
}
}
// Don't bother keeping the ring if it has been trimmed out of
// existence.
if ( ring->first.size() == 0 )
delete ring;
else
{
rings.push_back( ring );
total_points += ring->first.size();
}
}
// Now we draw the polygons
// use painter paths for drawing polygons with holes
// when adding polygon to the path they invert the area
// this means that adding inner rings to the path creates
// holes in outer ring
QPainterPath path; // OddEven fill rule by default
// Only try to draw polygons if there is something to draw
if ( total_points > 0 )
{
//preserve a copy of the brush and pen before we start fiddling with it
QBrush brush = p->brush(); //to be kept as original
QPen pen = p->pen(); // to be kept original
//
// experimental alpha transparency
// 255 = opaque
//
QBrush myTransparentBrush = p->brush();
QColor myColor = brush.color();
//only set transparency from layer level if renderer does not provide
//transparency on class level
if ( !mRenderer->usesTransparency() )
{
myColor.setAlpha( mTransparencyLevel );
}
myTransparentBrush.setColor( myColor );
QPen myTransparentPen = p->pen(); // store current pen
myColor = myTransparentPen.color();
//only set transparency from layer level if renderer does not provide
//transparency on class level
if ( !mRenderer->usesTransparency() )
{
myColor.setAlpha( mTransparencyLevel );
}
myTransparentPen.setColor( myColor );
p->setBrush( myTransparentBrush );
p->setPen( myTransparentPen );
if ( numRings == 1 )
{
ringTypePtr r = rings[0];
unsigned ringSize = r->first.size();
QPolygonF pa( ringSize );
for ( register unsigned int j = 0; j != ringSize; ++j )
{
pa[j].setX( r->first[j] );
pa[j].setY( r->second[j] );
}
p->drawPolygon( pa );
// draw vertex markers if in editing mode, but only to the main canvas
if ( mEditable && renderContext.drawEditingInformation() )
{
for ( register unsigned int j = 0; j != ringSize; ++j )
{
drawVertexMarker( r->first[j], r->second[j], *p, mCurrentVertexMarkerType, mCurrentVertexMarkerSize );
}
}
delete rings[0];
}
else
{
// Store size here and use it in the loop to avoid penalty of
// multiple calls to size()
int numRings = rings.size();
for ( register int i = 0; i < numRings; ++i )
{
// Store the pointer in a variable with a short name so as to make
// the following code easier to type and read.
ringTypePtr r = rings[i];
// only do this once to avoid penalty of additional calls
unsigned ringSize = r->first.size();
// Transfer points to the array of QPointF
QPolygonF pa( ringSize );
for ( register unsigned int j = 0; j != ringSize; ++j )
{
pa[j].setX( r->first[j] );
pa[j].setY( r->second[j] );
}
path.addPolygon( pa );
// Tidy up the pointed to pairs of vectors as we finish with them
delete rings[i];
}
#if 0
// A bit of code to aid in working out what values of
// QgsClipper::minX, etc cause the X11 zoom bug.
int largestX = -std::numeric_limits<int>::max();
int smallestX = std::numeric_limits<int>::max();
int largestY = -std::numeric_limits<int>::max();
int smallestY = std::numeric_limits<int>::max();
for ( int i = 0; i < pa.size(); ++i )
{
largestX = std::max( largestX, pa.point( i ).x() );
smallestX = std::min( smallestX, pa.point( i ).x() );
largestY = std::max( largestY, pa.point( i ).y() );
smallestY = std::min( smallestY, pa.point( i ).y() );
}
QgsDebugMsg( QString( "Largest X coordinate was %1" ).arg( largestX ) );
QgsDebugMsg( QString( "Smallest X coordinate was %1" ).arg( smallestX ) );
QgsDebugMsg( QString( "Largest Y coordinate was %1" ).arg( largestY ) );
QgsDebugMsg( QString( "Smallest Y coordinate was %1" ).arg( smallestY ) );
#endif
//
// draw the polygon
//
p->drawPath( path );
// draw vertex markers if in editing mode, but only to the main canvas
if ( mEditable && renderContext.drawEditingInformation() )
{
for ( int i = 0; i < path.elementCount(); ++i )
{
const QPainterPath::Element & e = path.elementAt( i );
drawVertexMarker( e.x, e.y, *p, mCurrentVertexMarkerType, mCurrentVertexMarkerSize );
}
}
}
//
//restore brush and pen to original
//
p->setBrush( brush );
p->setPen( pen );
} // totalPoints > 0
return ptr;
}
void QgsVectorLayer::drawRendererV2( QgsRenderContext& rendererContext, bool labeling )
{
QSettings settings;
bool vertexMarkerOnlyForSelection = settings.value( "/qgis/digitizing/marker_only_for_selected", false ).toBool();
mRendererV2->startRender( rendererContext, this );
#ifndef Q_WS_MAC
int featureCount = 0;
#endif //Q_WS_MAC
QgsFeature fet;
while ( nextFeature( fet ) )
{
try
{
if ( rendererContext.renderingStopped() )
{
break;
}
#ifndef Q_WS_MAC //MH: disable this on Mac for now to avoid problems with resizing
if ( mUpdateThreshold > 0 && 0 == featureCount % mUpdateThreshold )
{
emit screenUpdateRequested();
// emit drawingProgress( featureCount, totalFeatures );
qApp->processEvents();
}
else if ( featureCount % 1000 == 0 )
{
// emit drawingProgress( featureCount, totalFeatures );
qApp->processEvents();
}
#endif //Q_WS_MAC
bool sel = mSelectedFeatureIds.contains( fet.id() );
bool drawMarker = ( mEditable && ( !vertexMarkerOnlyForSelection || sel ) );
// render feature
mRendererV2->renderFeature( fet, rendererContext, -1, sel, drawMarker );
// labeling - register feature
if ( labeling && mRendererV2->symbolForFeature( fet ) != NULL )
rendererContext.labelingEngine()->registerFeature( this, fet, rendererContext );
if ( mEditable )
{
// Cache this for the use of (e.g.) modifying the feature's uncommitted geometry.
mCachedGeometries[fet.id()] = *fet.geometry();
}
}
catch ( const QgsCsException &cse )
{
QgsDebugMsg( QString( "Failed to transform a point while drawing a feature of type '%1'. Ignoring this feature. %2" )
.arg( fet.typeName() ).arg( cse.what() ) );
}
#ifndef Q_WS_MAC
++featureCount;
#endif //Q_WS_MAC
}
}
void QgsVectorLayer::drawRendererV2Levels( QgsRenderContext& rendererContext, bool labeling )
{
QHash< QgsSymbolV2*, QList<QgsFeature> > features; // key = symbol, value = array of features
QSettings settings;
bool vertexMarkerOnlyForSelection = settings.value( "/qgis/digitizing/marker_only_for_selected", false ).toBool();
// startRender must be called before symbolForFeature() calls to make sure renderer is ready
mRendererV2->startRender( rendererContext, this );
QgsSingleSymbolRendererV2* selRenderer = NULL;
if ( !mSelectedFeatureIds.isEmpty() )
{
selRenderer = new QgsSingleSymbolRendererV2( QgsSymbolV2::defaultSymbol( geometryType() ) );
selRenderer->symbol()->setColor( QgsRenderer::selectionColor() );
selRenderer->setVertexMarkerAppearance( currentVertexMarkerType(), currentVertexMarkerSize() );
selRenderer->startRender( rendererContext, this );
}
// 1. fetch features
QgsFeature fet;
#ifndef Q_WS_MAC
int featureCount = 0;
#endif //Q_WS_MAC
while ( nextFeature( fet ) )
{
if ( rendererContext.renderingStopped() )
{
stopRendererV2( rendererContext, selRenderer );
return;
}
#ifndef Q_WS_MAC
if ( featureCount % 1000 == 0 )
{
qApp->processEvents();
}
#endif //Q_WS_MAC
QgsSymbolV2* sym = mRendererV2->symbolForFeature( fet );
if ( !features.contains( sym ) )
{
features.insert( sym, QList<QgsFeature>() );
}
features[sym].append( fet );
if ( labeling && mRendererV2->symbolForFeature( fet ) != NULL )
rendererContext.labelingEngine()->registerFeature( this, fet, rendererContext );
if ( mEditable )
{
// Cache this for the use of (e.g.) modifying the feature's uncommitted geometry.
mCachedGeometries[fet.id()] = *fet.geometry();
}
#ifndef Q_WS_MAC
++featureCount;
#endif //Q_WS_MAC
}
// find out the order
QgsSymbolV2LevelOrder levels;
QgsSymbolV2List symbols = mRendererV2->symbols();
for ( int i = 0; i < symbols.count(); i++ )
{
QgsSymbolV2* sym = symbols[i];
for ( int j = 0; j < sym->symbolLayerCount(); j++ )
{
int level = sym->symbolLayer( j )->renderingPass();
QgsSymbolV2LevelItem item( sym, j );
while ( level >= levels.count() ) // append new empty levels
levels.append( QgsSymbolV2Level() );
levels[level].append( item );
}
}
// 2. draw features in correct order
for ( int l = 0; l < levels.count(); l++ )
{
QgsSymbolV2Level& level = levels[l];
for ( int i = 0; i < level.count(); i++ )
{
QgsSymbolV2LevelItem& item = level[i];
if ( !features.contains( item.symbol() ) )
{
QgsDebugMsg( "level item's symbol not found!" );
continue;
}
int layer = item.layer();
QList<QgsFeature>& lst = features[item.symbol()];
QList<QgsFeature>::iterator fit;
#ifndef Q_WS_MAC
featureCount = 0;
#endif //Q_WS_MAC
for ( fit = lst.begin(); fit != lst.end(); ++fit )
{
if ( rendererContext.renderingStopped() )
{
stopRendererV2( rendererContext, selRenderer );
return;
}
#ifndef Q_WS_MAC
if ( featureCount % 1000 == 0 )
{
qApp->processEvents();
}
#endif //Q_WS_MAC
bool sel = mSelectedFeatureIds.contains( fit->id() );
// maybe vertex markers should be drawn only during the last pass...
bool drawMarker = ( mEditable && ( !vertexMarkerOnlyForSelection || sel ) );
try
{
mRendererV2->renderFeature( *fit, rendererContext, layer, sel, drawMarker );
}
catch ( const QgsCsException &cse )
{
QgsDebugMsg( QString( "Failed to transform a point while drawing a feature of type '%1'. Ignoring this feature. %2" )
.arg( fet.typeName() ).arg( cse.what() ) );
}
#ifndef Q_WS_MAC
++featureCount;
#endif //Q_WS_MAC
}
}
}
stopRendererV2( rendererContext, selRenderer );
}
bool QgsVectorLayer::draw( QgsRenderContext& rendererContext )
{
//set update threshold before each draw to make sure the current setting is picked up
QSettings settings;
mUpdateThreshold = settings.value( "Map/updateThreshold", 0 ).toInt();
if ( mUsingRendererV2 )
{
if ( mRendererV2 == NULL )
return false;
QgsDebugMsg( "rendering v2:\n" + mRendererV2->dump() );
if ( mEditable )
{
// Destroy all cached geometries and clear the references to them
deleteCachedGeometries();
mCachedGeometriesRect = rendererContext.extent();
// set editing vertex markers style
mRendererV2->setVertexMarkerAppearance( currentVertexMarkerType(), currentVertexMarkerSize() );
}
QgsAttributeList attributes;
foreach( QString attrName, mRendererV2->usedAttributes() )
{
int attrNum = fieldNameIndex( attrName );
attributes.append( attrNum );
QgsDebugMsg( "attrs: " + attrName + " - " + QString::number( attrNum ) );
}
bool labeling = false;
if ( rendererContext.labelingEngine() )
{
int attrIndex;
if ( rendererContext.labelingEngine()->prepareLayer( this, attrIndex, rendererContext ) )
{
if ( !attributes.contains( attrIndex ) )
attributes << attrIndex;
labeling = true;
}
}
select( attributes, rendererContext.extent() );
if ( mRendererV2->usingSymbolLevels() )
drawRendererV2Levels( rendererContext, labeling );
else
drawRendererV2( rendererContext, labeling );
return true;
}
//draw ( p, viewExtent, theMapToPixelTransform, ct, drawingToEditingCanvas, 1., 1.);
if ( mRenderer )
{
// painter is active (begin has been called
/* Steps to draw the layer
1. get the features in the view extent by SQL query
2. read WKB for a feature
3. transform
4. draw
*/
QPen pen;
/*Pointer to a marker image*/
QImage marker;
//vertex marker type for selection
QgsVectorLayer::VertexMarkerType vertexMarker = QgsVectorLayer::NoMarker;
int vertexMarkerSize = 7;
if ( mEditable )
{
// Destroy all cached geometries and clear the references to them
deleteCachedGeometries();
mCachedGeometriesRect = rendererContext.extent();
vertexMarker = currentVertexMarkerType();
vertexMarkerSize = currentVertexMarkerSize();
mVertexMarkerOnlyForSelection = settings.value( "/qgis/digitizing/marker_only_for_selected", false ).toBool();
}
// int totalFeatures = pendingFeatureCount();
int featureCount = 0;
QgsFeature fet;
QgsAttributeList attributes = mRenderer->classificationAttributes();
bool labeling = false;
if ( rendererContext.labelingEngine() )
{
int attrIndex;
if ( rendererContext.labelingEngine()->prepareLayer( this, attrIndex, rendererContext ) )
{
if ( !attributes.contains( attrIndex ) )
attributes << attrIndex;
labeling = true;
}
}
select( attributes, rendererContext.extent() );
try
{
while ( nextFeature( fet ) )
{
if ( rendererContext.renderingStopped() )
{
break;
}
#ifndef Q_WS_MAC //MH: disable this on Mac for now to avoid problems with resizing
if ( mUpdateThreshold > 0 && 0 == featureCount % mUpdateThreshold )
{
emit screenUpdateRequested();
// emit drawingProgress( featureCount, totalFeatures );
qApp->processEvents();
}
else if ( featureCount % 1000 == 0 )
{
// emit drawingProgress( featureCount, totalFeatures );
qApp->processEvents();
}
// #else
// Q_UNUSED( totalFeatures );
#endif //Q_WS_MAC
// check if feature is selected
// only show selections of the current layer
// TODO: create a mechanism to let layer know whether it's current layer or not [MD]
bool sel = mSelectedFeatureIds.contains( fet.id() );
mCurrentVertexMarkerType = QgsVectorLayer::NoMarker;
mCurrentVertexMarkerSize = 7;
if ( mEditable )
{
// Cache this for the use of (e.g.) modifying the feature's uncommitted geometry.
mCachedGeometries[fet.id()] = *fet.geometry();
if ( !mVertexMarkerOnlyForSelection || sel )
{
mCurrentVertexMarkerType = vertexMarker;
mCurrentVertexMarkerSize = vertexMarkerSize;
}
}
//QgsDebugMsg(QString("markerScale before renderFeature(): %1").arg(markerScaleFactor));
// markerScalerFactore reflects the wanted scaling of the marker
double opacity = 1.0;
if ( !mRenderer->usesTransparency() )
{
opacity = ( mTransparencyLevel * 1.0 ) / 255.0;
}
mRenderer->renderFeature( rendererContext, fet, &marker, sel, opacity );
// markerScalerFactore now reflects the actual scaling of the marker that the render performed.
//QgsDebugMsg(QString("markerScale after renderFeature(): %1").arg(markerScaleFactor));
//double scale = rendererContext.scaleFactor() / markerScaleFactor;
drawFeature( rendererContext, fet, &marker );
if ( labeling && mRenderer->willRenderFeature( &fet ) )
{
rendererContext.labelingEngine()->registerFeature( this, fet, rendererContext );
}
++featureCount;
}
}
catch ( QgsCsException &cse )
{
QgsDebugMsg( QString( "Failed to transform a point while drawing a feature of type '%1'. Rendering stopped. %2" )
.arg( fet.typeName() ).arg( cse.what() ) );
return false;
}
}
else
{
QgsDebugMsg( "QgsRenderer is null" );
}
if ( mEditable )
{
QgsDebugMsg( QString( "Cached %1 geometries." ).arg( mCachedGeometries.count() ) );
}
return true; // Assume success always
}
void QgsVectorLayer::deleteCachedGeometries()
{
// Destroy any cached geometries
mCachedGeometries.clear();
mCachedGeometriesRect = QgsRectangle();
}
void QgsVectorLayer::drawVertexMarker( double x, double y, QPainter& p, QgsVectorLayer::VertexMarkerType type, int m )
{
if ( type == QgsVectorLayer::SemiTransparentCircle )
{
p.setPen( QColor( 50, 100, 120, 200 ) );
p.setBrush( QColor( 200, 200, 210, 120 ) );
p.drawEllipse( x - m, y - m, m*2 + 1, m*2 + 1 );
}
else if ( type == QgsVectorLayer::Cross )
{
p.setPen( QColor( 255, 0, 0 ) );
p.drawLine( x - m, y + m, x + m, y - m );
p.drawLine( x - m, y - m, x + m, y + m );
}
}
void QgsVectorLayer::select( int number, bool emitSignal )
{
mSelectedFeatureIds.insert( number );
if ( emitSignal )
{
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
}
}
void QgsVectorLayer::deselect( int number, bool emitSignal )
{
mSelectedFeatureIds.remove( number );
if ( emitSignal )
{
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
}
}
void QgsVectorLayer::select( QgsRectangle & rect, bool lock )
{
// normalize the rectangle
rect.normalize();
if ( !lock )
{
removeSelection( false ); // don't emit signal
}
//select all the elements
select( QgsAttributeList(), rect, false, true );
QgsFeature f;
while ( nextFeature( f ) )
{
select( f.id(), false ); // don't emit signal (not to redraw it everytime)
}
// invalidate cache
setCacheImage( 0 );
emit selectionChanged(); // now emit signal to redraw layer
}
void QgsVectorLayer::invertSelection()
{
// copy the ids of selected features to tmp
QgsFeatureIds tmp = mSelectedFeatureIds;
removeSelection( false ); // don't emit signal
select( QgsAttributeList(), QgsRectangle(), false );
QgsFeature fet;
while ( nextFeature( fet ) )
{
select( fet.id(), false ); // don't emit signal
}
for ( QgsFeatureIds::iterator iter = tmp.begin(); iter != tmp.end(); ++iter )
{
mSelectedFeatureIds.remove( *iter );
}
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
}
void QgsVectorLayer::invertSelectionInRectangle( QgsRectangle & rect )
{
// normalize the rectangle
rect.normalize();
select( QgsAttributeList(), rect, false, true );
QgsFeature fet;
while ( nextFeature( fet ) )
{
if ( mSelectedFeatureIds.contains( fet.id() ) )
{
deselect( fet.id(), false ); // don't emit signal
}
else
{
select( fet.id(), false ); // don't emit signal
}
}
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
}
void QgsVectorLayer::removeSelection( bool emitSignal )
{
if ( mSelectedFeatureIds.size() == 0 )
return;
mSelectedFeatureIds.clear();
if ( emitSignal )
{
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
}
}
void QgsVectorLayer::triggerRepaint()
{
emit repaintRequested();
}
QgsVectorDataProvider* QgsVectorLayer::dataProvider()
{
return mDataProvider;
}
const QgsVectorDataProvider* QgsVectorLayer::dataProvider() const
{
return mDataProvider;
}
void QgsVectorLayer::setProviderEncoding( const QString& encoding )
{
if ( mDataProvider )
{
mDataProvider->setEncoding( encoding );
}
}
const QgsRenderer* QgsVectorLayer::renderer() const
{
return mRenderer;
}
void QgsVectorLayer::setRenderer( QgsRenderer * r )
{
if ( r != mRenderer )
{
delete mRenderer;
mRenderer = r;
}
}
QGis::GeometryType QgsVectorLayer::geometryType() const
{
if ( mDataProvider )
{
int type = mDataProvider->geometryType();
switch ( type )
{
case QGis::WKBPoint:
case QGis::WKBPoint25D:
return QGis::Point;
case QGis::WKBLineString:
case QGis::WKBLineString25D:
return QGis::Line;
case QGis::WKBPolygon:
case QGis::WKBPolygon25D:
return QGis::Polygon;
case QGis::WKBMultiPoint:
case QGis::WKBMultiPoint25D:
return QGis::Point;
case QGis::WKBMultiLineString:
case QGis::WKBMultiLineString25D:
return QGis::Line;
case QGis::WKBMultiPolygon:
case QGis::WKBMultiPolygon25D:
return QGis::Polygon;
}
QgsDebugMsg( QString( "Data Provider Geometry type is not recognised, is %1" ).arg( type ) );
}
else
{
QgsDebugMsg( "pointer to mDataProvider is null" );
}
// We shouldn't get here, and if we have, other things are likely to
// go wrong. Code that uses the type() return value should be
// rewritten to cope with a value of QGis::Unknown. To make this
// need known, the following message is printed every time we get
// here.
QgsDebugMsg( "WARNING: This code should never be reached. Problems may occur..." );
return QGis::UnknownGeometry;
}
QGis::WkbType QgsVectorLayer::wkbType() const
{
return ( QGis::WkbType )( mWkbType );
}
QgsRectangle QgsVectorLayer::boundingBoxOfSelected()
{
if ( mSelectedFeatureIds.size() == 0 )//no selected features
{
return QgsRectangle( 0, 0, 0, 0 );
}
QgsRectangle r, retval;
select( QgsAttributeList(), QgsRectangle(), true );
retval.setMinimal();
QgsFeature fet;
while ( nextFeature( fet ) )
{
if ( mSelectedFeatureIds.contains( fet.id() ) )
{
if ( fet.geometry() )
{
r = fet.geometry()->boundingBox();
retval.combineExtentWith( &r );
}
}
}
if ( retval.width() == 0.0 || retval.height() == 0.0 )
{
// If all of the features are at the one point, buffer the
// rectangle a bit. If they are all at zero, do something a bit
// more crude.
if ( retval.xMinimum() == 0.0 && retval.xMaximum() == 0.0 &&
retval.yMinimum() == 0.0 && retval.yMaximum() == 0.0 )
{
retval.set( -1.0, -1.0, 1.0, 1.0 );
}
}
return retval;
}
long QgsVectorLayer::featureCount() const
{
if ( !mDataProvider )
{
QgsDebugMsg( "invoked with null mDataProvider" );
return 0;
}
return mDataProvider->featureCount();
}
long QgsVectorLayer::updateFeatureCount() const
{
return -1;
}
void QgsVectorLayer::updateExtents()
{
mLayerExtent.setMinimal();
if ( !mDataProvider )
QgsDebugMsg( "invoked with null mDataProvider" );
if ( mDeletedFeatureIds.isEmpty() && mChangedGeometries.isEmpty() )
{
// get the extent of the layer from the provider
// but only when there are some features already
if ( mDataProvider->featureCount() != 0 )
{
QgsRectangle r = mDataProvider->extent();
mLayerExtent.combineExtentWith( &r );
}
for ( QgsFeatureList::iterator it = mAddedFeatures.begin(); it != mAddedFeatures.end(); it++ )
{
QgsRectangle r = it->geometry()->boundingBox();
mLayerExtent.combineExtentWith( &r );
}
}
else
{
select( QgsAttributeList(), QgsRectangle(), true );
QgsFeature fet;
while ( nextFeature( fet ) )
{
if ( fet.geometry() )
{
QgsRectangle bb = fet.geometry()->boundingBox();
mLayerExtent.combineExtentWith( &bb );
}
}
}
if ( mLayerExtent.xMinimum() > mLayerExtent.xMaximum() && mLayerExtent.yMinimum() > mLayerExtent.yMaximum() )
{
// special case when there are no features in provider nor any added
mLayerExtent = QgsRectangle(); // use rectangle with zero coordinates
}
// Send this (hopefully) up the chain to the map canvas
emit recalculateExtents();
}
QString QgsVectorLayer::subsetString()
{
if ( ! mDataProvider )
{
QgsDebugMsg( "invoked with null mDataProvider" );
return 0;
}
return mDataProvider->subsetString();
}
bool QgsVectorLayer::setSubsetString( QString subset )
{
if ( ! mDataProvider )
{
QgsDebugMsg( "invoked with null mDataProvider" );
return false;
}
bool res = mDataProvider->setSubsetString( subset );
// get the updated data source string from the provider
mDataSource = mDataProvider->dataSourceUri();
updateExtents();
if ( res )
setCacheImage( 0 );
return res;
}
void QgsVectorLayer::updateFeatureAttributes( QgsFeature &f, bool all )
{
// do not update when we aren't in editing mode
if ( !mEditable )
return;
if ( mChangedAttributeValues.contains( f.id() ) )
{
const QgsAttributeMap &map = mChangedAttributeValues[f.id()];
for ( QgsAttributeMap::const_iterator it = map.begin(); it != map.end(); it++ )
f.changeAttribute( it.key(), it.value() );
}
// remove all attributes that will disappear
QgsAttributeMap map = f.attributeMap();
for ( QgsAttributeMap::const_iterator it = map.begin(); it != map.end(); it++ )
if ( !mUpdatedFields.contains( it.key() ) )
f.deleteAttribute( it.key() );
// null/add all attributes that were added, but don't exist in the feature yet
for ( QgsFieldMap::const_iterator it = mUpdatedFields.begin(); it != mUpdatedFields.end(); it++ )
if ( !map.contains( it.key() ) && ( all || mFetchAttributes.contains( it.key() ) ) )
f.changeAttribute( it.key(), QVariant( QString::null ) );
}
void QgsVectorLayer::updateFeatureGeometry( QgsFeature &f )
{
if ( mChangedGeometries.contains( f.id() ) )
f.setGeometry( mChangedGeometries[f.id()] );
}
void QgsVectorLayer::select( QgsAttributeList attributes, QgsRectangle rect, bool fetchGeometries, bool useIntersect )
{
if ( !mDataProvider )
return;
mFetching = true;
mFetchRect = rect;
mFetchAttributes = attributes;
mFetchGeometry = fetchGeometries;
mFetchConsidered = mDeletedFeatureIds;
if ( mEditable )
{
mFetchAddedFeaturesIt = mAddedFeatures.begin();
mFetchChangedGeomIt = mChangedGeometries.begin();
}
//look in the normal features of the provider
if ( mFetchAttributes.size() > 0 )
{
if ( mEditable )
{
// fetch only available field from provider
mFetchProvAttributes.clear();
for ( QgsAttributeList::iterator it = mFetchAttributes.begin(); it != mFetchAttributes.end(); it++ )
{
if ( !mUpdatedFields.contains( *it ) || mAddedAttributeIds.contains( *it ) )
continue;
mFetchProvAttributes << *it;
}
mDataProvider->select( mFetchProvAttributes, rect, fetchGeometries, useIntersect );
}
else
mDataProvider->select( mFetchAttributes, rect, fetchGeometries, useIntersect );
}
else
{
mDataProvider->select( QgsAttributeList(), rect, fetchGeometries, useIntersect );
}
}
bool QgsVectorLayer::nextFeature( QgsFeature &f )
{
if ( !mFetching )
return false;
if ( mEditable )
{
if ( !mFetchRect.isEmpty() )
{
// check if changed geometries are in rectangle
for ( ; mFetchChangedGeomIt != mChangedGeometries.end(); mFetchChangedGeomIt++ )
{
int fid = mFetchChangedGeomIt.key();
if ( mFetchConsidered.contains( fid ) )
// skip deleted features
continue;
mFetchConsidered << fid;
if ( !mFetchChangedGeomIt->intersects( mFetchRect ) )
// skip changed geometries not in rectangle and don't check again
continue;
f.setFeatureId( fid );
f.setValid( true );
if ( mFetchGeometry )
f.setGeometry( mFetchChangedGeomIt.value() );
if ( mFetchAttributes.size() > 0 )
{
if ( fid < 0 )
{
// fid<0 => in mAddedFeatures
bool found = false;
for ( QgsFeatureList::iterator it = mAddedFeatures.begin(); it != mAddedFeatures.end(); it++ )
{
if ( fid != it->id() )
{
found = true;
f.setAttributeMap( it->attributeMap() );
break;
}
}
if ( !found )
QgsDebugMsg( QString( "No attributes for the added feature %1 found" ).arg( f.id() ) );
}
else
{
// retrieve attributes from provider
QgsFeature tmp;
mDataProvider->featureAtId( fid, tmp, false, mFetchProvAttributes );
updateFeatureAttributes( tmp );
f.setAttributeMap( tmp.attributeMap() );
}
}
// return complete feature
mFetchChangedGeomIt++;
return true;
}
// no more changed geometries
}
for ( ; mFetchAddedFeaturesIt != mAddedFeatures.end(); mFetchAddedFeaturesIt++ )
{
int fid = mFetchAddedFeaturesIt->id();
if ( mFetchConsidered.contains( fid ) )
// must have changed geometry outside rectangle
continue;
if ( !mFetchRect.isEmpty() &&
mFetchAddedFeaturesIt->geometry() &&
!mFetchAddedFeaturesIt->geometry()->intersects( mFetchRect ) )
// skip added features not in rectangle
continue;
f.setFeatureId( fid );
f.setValid( true );
if ( mFetchGeometry )
f.setGeometry( *mFetchAddedFeaturesIt->geometry() );
if ( mFetchAttributes.size() > 0 )
{
f.setAttributeMap( mFetchAddedFeaturesIt->attributeMap() );
updateFeatureAttributes( f );
}
mFetchAddedFeaturesIt++;
return true;
}
// no more added features
}
while ( dataProvider()->nextFeature( f ) )
{
if ( mFetchConsidered.contains( f.id() ) )
continue;
if ( mEditable )
updateFeatureAttributes( f );
// found it
return true;
}
mFetching = false;
return false;
}
bool QgsVectorLayer::featureAtId( int featureId, QgsFeature& f, bool fetchGeometries, bool fetchAttributes )
{
if ( !mDataProvider )
return false;
if ( mDeletedFeatureIds.contains( featureId ) )
return false;
if ( fetchGeometries && mChangedGeometries.contains( featureId ) )
{
f.setFeatureId( featureId );
f.setValid( true );
f.setGeometry( mChangedGeometries[featureId] );
if ( fetchAttributes )
{
if ( featureId < 0 )
{
// featureId<0 => in mAddedFeatures
bool found = false;
for ( QgsFeatureList::iterator it = mAddedFeatures.begin(); it != mAddedFeatures.end(); it++ )
{
if ( featureId != it->id() )
{
found = true;
f.setAttributeMap( it->attributeMap() );
break;
}
}
if ( !found )
QgsDebugMsg( QString( "No attributes for the added feature %1 found" ).arg( f.id() ) );
}
else
{
// retrieve attributes from provider
QgsFeature tmp;
mDataProvider->featureAtId( featureId, tmp, false, mDataProvider->attributeIndexes() );
f.setAttributeMap( tmp.attributeMap() );
}
updateFeatureAttributes( f, true );
}
return true;
}
//added features
for ( QgsFeatureList::iterator iter = mAddedFeatures.begin(); iter != mAddedFeatures.end(); ++iter )
{
if ( iter->id() == featureId )
{
f.setFeatureId( iter->id() );
f.setValid( true );
if ( fetchGeometries )
f.setGeometry( *iter->geometry() );
if ( fetchAttributes )
f.setAttributeMap( iter->attributeMap() );
return true;
}
}
// regular features
if ( fetchAttributes )
{
if ( mDataProvider->featureAtId( featureId, f, fetchGeometries, mDataProvider->attributeIndexes() ) )
{
updateFeatureAttributes( f, true );
return true;
}
}
else
{
if ( mDataProvider->featureAtId( featureId, f, fetchGeometries, QgsAttributeList() ) )
{
return true;
}
}
return false;
}
bool QgsVectorLayer::addFeature( QgsFeature& f, bool alsoUpdateExtent )
{
static int addedIdLowWaterMark = -1;
if ( !mDataProvider )
{
return false;
}
if ( !( mDataProvider->capabilities() & QgsVectorDataProvider::AddFeatures ) )
{
return false;
}
if ( !isEditable() )
{
return false;
}
//assign a temporary id to the feature (use negative numbers)
addedIdLowWaterMark--;
QgsDebugMsg( "Assigned feature id " + QString::number( addedIdLowWaterMark ) );
// Force a feature ID (to keep other functions in QGIS happy,
// providers will use their own new feature ID when we commit the new feature)
// and add to the known added features.
f.setFeatureId( addedIdLowWaterMark );
editFeatureAdd( f );
mCachedGeometries[f.id()] = *f.geometry();
setModified( true );
if ( alsoUpdateExtent )
{
updateExtents();
}
return true;
}
bool QgsVectorLayer::insertVertex( double x, double y, int atFeatureId, int beforeVertex )
{
if ( !mEditable )
{
return false;
}
if ( mDataProvider )
{
QgsGeometry geometry;
if ( !mChangedGeometries.contains( atFeatureId ) )
{
// first time this geometry has changed since last commit
if ( !mCachedGeometries.contains( atFeatureId ) )
{
return false;
}
geometry = mCachedGeometries[atFeatureId];
//mChangedGeometries[atFeatureId] = mCachedGeometries[atFeatureId];
}
else
{
geometry = mChangedGeometries[atFeatureId];
}
geometry.insertVertex( x, y, beforeVertex );
mCachedGeometries[atFeatureId] = geometry;
editGeometryChange( atFeatureId, geometry );
setModified( true, true ); // only geometry was changed
return true;
}
return false;
}
bool QgsVectorLayer::moveVertex( double x, double y, int atFeatureId, int atVertex )
{
if ( !mEditable )
{
return false;
}
if ( mDataProvider )
{
QgsGeometry geometry;
if ( !mChangedGeometries.contains( atFeatureId ) )
{
// first time this geometry has changed since last commit
if ( !mCachedGeometries.contains( atFeatureId ) )
{
return false;
}
geometry = mCachedGeometries[atFeatureId];
//mChangedGeometries[atFeatureId] = mCachedGeometries[atFeatureId];
}
else
{
geometry = mChangedGeometries[atFeatureId];
}
geometry.moveVertex( x, y, atVertex );
mCachedGeometries[atFeatureId] = geometry;
editGeometryChange( atFeatureId, geometry );
setModified( true, true ); // only geometry was changed
return true;
}
return false;
}
bool QgsVectorLayer::deleteVertex( int atFeatureId, int atVertex )
{
if ( !mEditable )
{
return false;
}
if ( mDataProvider )
{
QgsGeometry geometry;
if ( !mChangedGeometries.contains( atFeatureId ) )
{
// first time this geometry has changed since last commit
if ( !mCachedGeometries.contains( atFeatureId ) )
{
return false;
}
geometry = mCachedGeometries[atFeatureId];
}
else
{
geometry = mChangedGeometries[atFeatureId];
}
if ( !geometry.deleteVertex( atVertex ) )
{
return false;
}
mCachedGeometries[atFeatureId] = geometry;
editGeometryChange( atFeatureId, geometry );
setModified( true, true ); // only geometry was changed
return true;
}
return false;
}
bool QgsVectorLayer::deleteSelectedFeatures()
{
if ( !( mDataProvider->capabilities() & QgsVectorDataProvider::DeleteFeatures ) )
{
return false;
}
if ( !isEditable() )
{
return false;
}
if ( mSelectedFeatureIds.size() == 0 )
return true;
while ( mSelectedFeatureIds.size() > 0 )
{
int fid = *mSelectedFeatureIds.begin();
deleteFeature( fid ); // removes from selection
}
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
triggerRepaint();
updateExtents();
return true;
}
int QgsVectorLayer::addRing( const QList<QgsPoint>& ring )
{
int addRingReturnCode = 5; //default: return code for 'ring not inserted'
double xMin, yMin, xMax, yMax;
QgsRectangle bBox;
if ( boundingBoxFromPointList( ring, xMin, yMin, xMax, yMax ) == 0 )
{
bBox.setXMinimum( xMin ); bBox.setYMinimum( yMin );
bBox.setXMaximum( xMax ); bBox.setYMaximum( yMax );
}
else
{
return 3; //ring not valid
}
select( QgsAttributeList(), bBox, true, true );
QgsFeature f;
while ( nextFeature( f ) )
{
addRingReturnCode = f.geometry()->addRing( ring );
if ( addRingReturnCode == 0 )
{
editGeometryChange( f.id(), *f.geometry() );
setModified( true, true );
break;
}
}
return addRingReturnCode;
}
int QgsVectorLayer::addIsland( const QList<QgsPoint>& ring )
{
//number of selected features must be 1
if ( mSelectedFeatureIds.size() < 1 )
{
QgsDebugMsg( "Number of selected features <1" );
return 4;
}
else if ( mSelectedFeatureIds.size() > 1 )
{
QgsDebugMsg( "Number of selected features >1" );
return 5;
}
int selectedFeatureId = *mSelectedFeatureIds.constBegin();
//look if geometry of selected feature already contains geometry changes
QgsGeometryMap::iterator changedIt = mChangedGeometries.find( selectedFeatureId );
if ( changedIt != mChangedGeometries.end() )
{
QgsGeometry geom = *changedIt;
int returnValue = geom.addIsland( ring );
editGeometryChange( selectedFeatureId, geom );
mCachedGeometries[selectedFeatureId] = geom;
return returnValue;
}
//look if id of selected feature belongs to an added feature
#if 0
for ( QgsFeatureList::iterator addedIt = mAddedFeatures.begin(); addedIt != mAddedFeatures.end(); ++addedIt )
{
if ( addedIt->id() == selectedFeatureId )
{
return addedIt->geometry()->addIsland( ring );
mCachedGeometries[selectedFeatureId] = *addedIt->geometry();
}
}
#endif
//is the feature contained in the view extent (mCachedGeometries) ?
QgsGeometryMap::iterator cachedIt = mCachedGeometries.find( selectedFeatureId );
if ( cachedIt != mCachedGeometries.end() )
{
int errorCode = cachedIt->addIsland( ring );
if ( errorCode == 0 )
{
editGeometryChange( selectedFeatureId, *cachedIt );
mCachedGeometries[selectedFeatureId] = *cachedIt;
setModified( true, true );
}
return errorCode;
}
else //maybe the selected feature has been moved outside the visible area and therefore is not contained in mCachedGeometries
{
QgsFeature f;
QgsGeometry* fGeom = 0;
if ( featureAtId( selectedFeatureId, f, true, false ) )
{
fGeom = f.geometryAndOwnership();
if ( fGeom )
{
int errorCode = fGeom->addIsland( ring );
editGeometryChange( selectedFeatureId, *fGeom );
setModified( true, true );
delete fGeom;
return errorCode;
}
}
}
return 6; //geometry not found
}
int QgsVectorLayer::translateFeature( int featureId, double dx, double dy )
{
//look if geometry of selected feature already contains geometry changes
QgsGeometryMap::iterator changedIt = mChangedGeometries.find( featureId );
if ( changedIt != mChangedGeometries.end() )
{
QgsGeometry geom = *changedIt;
int errorCode = geom.translate( dx, dy );
editGeometryChange( featureId, geom );
return errorCode;
}
//look if id of selected feature belongs to an added feature
#if 0
for ( QgsFeatureList::iterator addedIt = mAddedFeatures.begin(); addedIt != mAddedFeatures.end(); ++addedIt )
{
if ( addedIt->id() == featureId )
{
return addedIt->geometry()->translate( dx, dy );
}
}
#endif
//else look in mCachedGeometries to make access faster
QgsGeometryMap::iterator cachedIt = mCachedGeometries.find( featureId );
if ( cachedIt != mCachedGeometries.end() )
{
int errorCode = cachedIt->translate( dx, dy );
if ( errorCode == 0 )
{
editGeometryChange( featureId, *cachedIt );
setModified( true, true );
}
return errorCode;
}
//else get the geometry from provider (may be slow)
QgsFeature f;
if ( mDataProvider && mDataProvider->featureAtId( featureId, f, true ) )
{
if ( f.geometry() )
{
QgsGeometry translateGeom( *( f.geometry() ) );
int errorCode = translateGeom.translate( dx, dy );
if ( errorCode == 0 )
{
editGeometryChange( featureId, translateGeom );
setModified( true, true );
}
return errorCode;
}
}
return 1; //geometry not found
}
int QgsVectorLayer::splitFeatures( const QList<QgsPoint>& splitLine, bool topologicalEditing )
{
QgsFeatureList newFeatures; //store all the newly created features
double xMin, yMin, xMax, yMax;
QgsRectangle bBox; //bounding box of the split line
int returnCode = 0;
int splitFunctionReturn; //return code of QgsGeometry::splitGeometry
int numberOfSplitedFeatures = 0;
QgsFeatureList featureList;
const QgsFeatureIds selectedIds = selectedFeaturesIds();
if ( selectedIds.size() > 0 )//consider only the selected features if there is a selection
{
featureList = selectedFeatures();
}
else //else consider all the feature that intersect the bounding box of the split line
{
if ( boundingBoxFromPointList( splitLine, xMin, yMin, xMax, yMax ) == 0 )
{
bBox.setXMinimum( xMin ); bBox.setYMinimum( yMin );
bBox.setXMaximum( xMax ); bBox.setYMaximum( yMax );
}
else
{
return 1;
}
if ( bBox.isEmpty() )
{
//if the bbox is a line, try to make a square out of it
if ( bBox.width() == 0.0 && bBox.height() > 0 )
{
bBox.setXMinimum( bBox.xMinimum() - bBox.height() / 2 );
bBox.setXMaximum( bBox.xMaximum() + bBox.height() / 2 );
}
else if ( bBox.height() == 0.0 && bBox.width() > 0 )
{
bBox.setYMinimum( bBox.yMinimum() - bBox.width() / 2 );
bBox.setYMaximum( bBox.yMaximum() + bBox.width() / 2 );
}
else
{
return 2;
}
}
select( pendingAllAttributesList(), bBox, true, true );
QgsFeature f;
while ( nextFeature( f ) )
featureList << QgsFeature( f );
}
QgsFeatureList::iterator select_it = featureList.begin();
for ( ; select_it != featureList.end(); ++select_it )
{
QList<QgsGeometry*> newGeometries;
QList<QgsPoint> topologyTestPoints;
QgsGeometry* newGeometry = 0;
splitFunctionReturn = select_it->geometry()->splitGeometry( splitLine, newGeometries, topologicalEditing, topologyTestPoints );
if ( splitFunctionReturn == 0 )
{
//change this geometry
editGeometryChange( select_it->id(), *( select_it->geometry() ) );
//update of cached geometries is necessary because we use addTopologicalPoints() later
mCachedGeometries[select_it->id()] = *( select_it->geometry() );
//insert new features
for ( int i = 0; i < newGeometries.size(); ++i )
{
newGeometry = newGeometries.at( i );
QgsFeature newFeature;
newFeature.setGeometry( newGeometry );
newFeature.setAttributeMap( select_it->attributeMap() );
newFeatures.append( newFeature );
}
setModified( true, true );
if ( topologicalEditing )
{
QList<QgsPoint>::const_iterator topol_it = topologyTestPoints.constBegin();
for ( ; topol_it != topologyTestPoints.constEnd(); ++topol_it )
{
addTopologicalPoints( *topol_it );
}
}
++numberOfSplitedFeatures;
}
else if ( splitFunctionReturn > 1 ) //1 means no split but also no error
{
returnCode = 3;
}
}
if ( numberOfSplitedFeatures == 0 && selectedIds.size() > 0 )
{
//There is a selection but no feature has been split.
//Maybe user forgot that only the selected features are split
returnCode = 4;
}
//now add the new features to this vectorlayer
addFeatures( newFeatures, false );
return returnCode;
}
int QgsVectorLayer::removePolygonIntersections( QgsGeometry* geom )
{
int returnValue = 0;
//first test if geom really has type polygon or multipolygon
if ( geom->type() != QGis::Polygon )
{
return 1;
}
//get bounding box of geom
QgsRectangle geomBBox = geom->boundingBox();
//get list of features that intersect this bounding box
select( QgsAttributeList(), geomBBox, true, true );
QgsFeature f;
while ( nextFeature( f ) )
{
//call geometry->makeDifference for each feature
QgsGeometry *currentGeom = f.geometry();
if ( currentGeom )
{
if ( geom->makeDifference( currentGeom ) != 0 )
{
returnValue = 2;
}
}
}
return returnValue;
}
int QgsVectorLayer::addTopologicalPoints( QgsGeometry* geom )
{
if ( !geom )
{
return 1;
}
int returnVal = 0;
QGis::WkbType wkbType = geom->wkbType();
switch ( wkbType )
{
//line
case QGis::WKBLineString25D:
case QGis::WKBLineString:
{
QgsPolyline theLine = geom->asPolyline();
QgsPolyline::const_iterator line_it = theLine.constBegin();
for ( ; line_it != theLine.constEnd(); ++line_it )
{
if ( addTopologicalPoints( *line_it ) != 0 )
{
returnVal = 2;
}
}
break;
}
//multiline
case QGis::WKBMultiLineString25D:
case QGis::WKBMultiLineString:
{
QgsMultiPolyline theMultiLine = geom->asMultiPolyline();
QgsPolyline currentPolyline;
for ( int i = 0; i < theMultiLine.size(); ++i )
{
QgsPolyline::const_iterator line_it = currentPolyline.constBegin();
for ( ; line_it != currentPolyline.constEnd(); ++line_it )
{
if ( addTopologicalPoints( *line_it ) != 0 )
{
returnVal = 2;
}
}
}
break;
}
//polygon
case QGis::WKBPolygon25D:
case QGis::WKBPolygon:
{
QgsPolygon thePolygon = geom->asPolygon();
QgsPolyline currentRing;
for ( int i = 0; i < thePolygon.size(); ++i )
{
currentRing = thePolygon.at( i );
QgsPolyline::const_iterator line_it = currentRing.constBegin();
for ( ; line_it != currentRing.constEnd(); ++line_it )
{
if ( addTopologicalPoints( *line_it ) != 0 )
{
returnVal = 2;
}
}
}
break;
}
//multipolygon
case QGis::WKBMultiPolygon25D:
case QGis::WKBMultiPolygon:
{
QgsMultiPolygon theMultiPolygon = geom->asMultiPolygon();
QgsPolygon currentPolygon;
QgsPolyline currentRing;
for ( int i = 0; i < theMultiPolygon.size(); ++i )
{
currentPolygon = theMultiPolygon.at( i );
for ( int j = 0; j < currentPolygon.size(); ++j )
{
currentRing = currentPolygon.at( j );
QgsPolyline::const_iterator line_it = currentRing.constBegin();
for ( ; line_it != currentRing.constEnd(); ++line_it )
{
if ( addTopologicalPoints( *line_it ) != 0 )
{
returnVal = 2;
}
}
}
}
break;
}
default:
break;
}
return returnVal;
}
int QgsVectorLayer::addTopologicalPoints( const QgsPoint& p )
{
QMultiMap<double, QgsSnappingResult> snapResults; //results from the snapper object
//we also need to snap to vertex to make sure the vertex does not already exist in this geometry
QMultiMap<double, QgsSnappingResult> vertexSnapResults;
QList<QgsSnappingResult> filteredSnapResults; //we filter out the results that are on existing vertices
//work with a tolerance because coordinate projection may introduce some rounding
double threshold = 0.0000001;
if ( mCRS && mCRS->mapUnits() == QGis::Meters )
{
threshold = 0.001;
}
else if ( mCRS && mCRS->mapUnits() == QGis::Feet )
{
threshold = 0.0001;
}
if ( snapWithContext( p, threshold, snapResults, QgsSnapper::SnapToSegment ) != 0 )
{
return 2;
}
QMultiMap<double, QgsSnappingResult>::const_iterator snap_it = snapResults.constBegin();
QMultiMap<double, QgsSnappingResult>::const_iterator vertex_snap_it;
for ( ; snap_it != snapResults.constEnd(); ++snap_it )
{
//test if p is already a vertex of this geometry. If yes, don't insert it
bool vertexAlreadyExists = false;
if ( snapWithContext( p, threshold, vertexSnapResults, QgsSnapper::SnapToVertex ) != 0 )
{
continue;
}
vertex_snap_it = vertexSnapResults.constBegin();
for ( ; vertex_snap_it != vertexSnapResults.constEnd(); ++vertex_snap_it )
{
if ( snap_it.value().snappedAtGeometry == vertex_snap_it.value().snappedAtGeometry )
{
vertexAlreadyExists = true;
}
}
if ( !vertexAlreadyExists )
{
filteredSnapResults.push_back( *snap_it );
}
}
insertSegmentVerticesForSnap( filteredSnapResults );
return 0;
}
QgsLabel * QgsVectorLayer::label()
{
return mLabel;
}
const QgsLabel *QgsVectorLayer::label() const
{
return mLabel;
}
void QgsVectorLayer::enableLabels( bool on )
{
mLabelOn = on;
}
bool QgsVectorLayer::hasLabelsEnabled( void ) const
{
return mLabelOn;
}
bool QgsVectorLayer::startEditing()
{
if ( !mDataProvider )
{
return false;
}
// allow editing if provider supports any of the capabilities
if ( !( mDataProvider->capabilities() & QgsVectorDataProvider::EditingCapabilities ) )
{
return false;
}
if ( mEditable )
{
// editing already underway
return false;
}
mEditable = true;
mUpdatedFields = mDataProvider->fields();
mMaxUpdatedIndex = -1;
for ( QgsFieldMap::const_iterator it = mUpdatedFields.begin(); it != mUpdatedFields.end(); it++ )
if ( it.key() > mMaxUpdatedIndex )
mMaxUpdatedIndex = it.key();
emit editingStarted();
return true;
}
bool QgsVectorLayer::readXml( QDomNode & layer_node )
{
QgsDebugMsg( QString( "Datasource in QgsVectorLayer::readXml: " ) + mDataSource.toLocal8Bit().data() );
//process provider key
QDomNode pkeyNode = layer_node.namedItem( "provider" );
if ( pkeyNode.isNull() )
{
mProviderKey = "";
}
else
{
QDomElement pkeyElt = pkeyNode.toElement();
mProviderKey = pkeyElt.text();
}
// determine type of vector layer
if ( ! mProviderKey.isNull() )
{
// if the provider string isn't empty, then we successfully
// got the stored provider
}
else if ( mDataSource.contains( "dbname=" ) )
{
mProviderKey = "postgres";
}
else
{
mProviderKey = "ogr";
}
if ( ! setDataProvider( mProviderKey ) )
{
return false;
}
QDomElement pkeyElem = pkeyNode.toElement();
if ( !pkeyElem.isNull() )
{
QString encodingString = pkeyElem.attribute( "encoding" );
if ( !encodingString.isEmpty() )
{
mDataProvider->setEncoding( encodingString );
}
}
QString errorMsg;
if ( !readSymbology( layer_node, errorMsg ) )
{
return false;
}
return mValid; // should be true if read successfully
} // void QgsVectorLayer::readXml
bool QgsVectorLayer::setDataProvider( QString const & provider )
{
// XXX should I check for and possibly delete any pre-existing providers?
// XXX How often will that scenario occur?
mProviderKey = provider; // XXX is this necessary? Usually already set
// XXX when execution gets here.
//XXX - This was a dynamic cast but that kills the Windows
// version big-time with an abnormal termination error
mDataProvider =
( QgsVectorDataProvider* )( QgsProviderRegistry::instance()->getProvider( provider, mDataSource ) );
if ( mDataProvider )
{
QgsDebugMsg( "Instantiated the data provider plugin" );
mValid = mDataProvider->isValid();
if ( mValid )
{
// TODO: Check if the provider has the capability to send fullExtentCalculated
connect( mDataProvider, SIGNAL( fullExtentCalculated() ), this, SLOT( updateExtents() ) );
// get the extent
QgsRectangle mbr = mDataProvider->extent();
// show the extent
QString s = mbr.toString();
QgsDebugMsg( "Extent of layer: " + s );
// store the extent
mLayerExtent.setXMaximum( mbr.xMaximum() );
mLayerExtent.setXMinimum( mbr.xMinimum() );
mLayerExtent.setYMaximum( mbr.yMaximum() );
mLayerExtent.setYMinimum( mbr.yMinimum() );
// get and store the feature type
mWkbType = mDataProvider->geometryType();
// look at the fields in the layer and set the primary
// display field using some real fuzzy logic
setDisplayField();
if ( mProviderKey == "postgres" )
{
QgsDebugMsg( "Beautifying layer name " + name() );
// adjust the display name for postgres layers
QRegExp reg( "\"[^\"]+\"\\.\"([^\"]+)\" \\(([^)]+)\\)" );
if ( reg.indexIn( name() ) >= 0 )
{
QStringList stuff = reg.capturedTexts();
QString lName = stuff[1];
const QMap<QString, QgsMapLayer*> &layers = QgsMapLayerRegistry::instance()->mapLayers();
QMap<QString, QgsMapLayer*>::const_iterator it;
for ( it = layers.constBegin(); it != layers.constEnd() && ( *it )->name() != lName; it++ )
;
if ( it != layers.constEnd() )
lName += "." + stuff[2];
if ( !lName.isEmpty() )
setLayerName( lName );
}
QgsDebugMsg( "Beautifying layer name " + name() );
// deal with unnecessary schema qualification to make v.in.ogr happy
mDataSource = mDataProvider->dataSourceUri();
}
else if ( mProviderKey == "osm" )
{
// make sure that the "observer" has been removed from URI to avoid crashes
mDataSource = mDataProvider->dataSourceUri();
}
// label
mLabel = new QgsLabel( mDataProvider->fields() );
mLabelOn = false;
}
else
{
QgsDebugMsg( "Invalid provider plugin " + QString( mDataSource.toUtf8() ) );
return false;
}
}
else
{
QgsDebugMsg( " unable to get data provider" );
return false;
}
return true;
} // QgsVectorLayer:: setDataProvider
/* virtual */
bool QgsVectorLayer::writeXml( QDomNode & layer_node,
QDomDocument & document )
{
// first get the layer element so that we can append the type attribute
QDomElement mapLayerNode = layer_node.toElement();
if ( mapLayerNode.isNull() || ( "maplayer" != mapLayerNode.nodeName() ) )
{
QgsDebugMsg( "can't find <maplayer>" );
return false;
}
mapLayerNode.setAttribute( "type", "vector" );
// set the geometry type
mapLayerNode.setAttribute( "geometry", QGis::qgisVectorGeometryType[geometryType()] );
// add provider node
if ( mDataProvider )
{
QDomElement provider = document.createElement( "provider" );
provider.setAttribute( "encoding", mDataProvider->encoding() );
QDomText providerText = document.createTextNode( providerType() );
provider.appendChild( providerText );
layer_node.appendChild( provider );
}
// renderer specific settings
QString errorMsg;
if ( !writeSymbology( layer_node, document, errorMsg ) )
{
return false;
}
return true;
} // bool QgsVectorLayer::writeXml
bool QgsVectorLayer::readSymbology( const QDomNode& node, QString& errorMessage )
{
// try renderer v2 first
QDomElement rendererElement = node.firstChildElement( RENDERER_TAG_NAME );
if ( !rendererElement.isNull() )
{
// using renderer v2
setUsingRendererV2( true );
QgsFeatureRendererV2* r = QgsFeatureRendererV2::load( rendererElement );
if ( r == NULL )
return false;
setRendererV2( r );
}
else
{
// using renderer v1
setUsingRendererV2( false );
// create and bind a renderer to this layer
QDomNode singlenode = node.namedItem( "singlesymbol" );
QDomNode graduatednode = node.namedItem( "graduatedsymbol" );
QDomNode continuousnode = node.namedItem( "continuoussymbol" );
QDomNode uniquevaluenode = node.namedItem( "uniquevalue" );
QgsRenderer * renderer = 0;
int returnCode = 1;
if ( !singlenode.isNull() )
{
renderer = new QgsSingleSymbolRenderer( geometryType() );
returnCode = renderer->readXML( singlenode, *this );
}
else if ( !graduatednode.isNull() )
{
renderer = new QgsGraduatedSymbolRenderer( geometryType() );
returnCode = renderer->readXML( graduatednode, *this );
}
else if ( !continuousnode.isNull() )
{
renderer = new QgsContinuousColorRenderer( geometryType() );
returnCode = renderer->readXML( continuousnode, *this );
}
else if ( !uniquevaluenode.isNull() )
{
renderer = new QgsUniqueValueRenderer( geometryType() );
returnCode = renderer->readXML( uniquevaluenode, *this );
}
if ( !renderer )
{
errorMessage = tr( "Unknown renderer" );
return false;
}
if ( returnCode == 1 )
{
errorMessage = tr( "No renderer object" ); delete renderer; return false;
}
else if ( returnCode == 2 )
{
errorMessage = tr( "Classification field not found" ); delete renderer; return false;
}
mRenderer = renderer;
}
// process the attribute actions
mActions->readXML( node );
// get and set the display field if it exists.
QDomNode displayFieldNode = node.namedItem( "displayfield" );
if ( !displayFieldNode.isNull() )
{
QDomElement e = displayFieldNode.toElement();
setDisplayField( e.text() );
}
// use scale dependent visibility flag
QDomElement e = node.toElement();
label()->setScaleBasedVisibility( e.attribute( "scaleBasedLabelVisibilityFlag", "0" ) == "1" );
label()->setMinScale( e.attribute( "minLabelScale", "1" ).toFloat() );
label()->setMaxScale( e.attribute( "maxLabelScale", "100000000" ).toFloat() );
mEditTypes.clear();
QDomNode editTypesNode = node.namedItem( "edittypes" );
if ( !editTypesNode.isNull() )
{
QDomNodeList editTypeNodes = editTypesNode.childNodes();
for ( int i = 0; i < editTypeNodes.size(); i++ )
{
QDomNode editTypeNode = editTypeNodes.at( i );
QDomElement editTypeElement = editTypeNode.toElement();
QString name = editTypeElement.attribute( "name" );
EditType editType = ( EditType ) editTypeElement.attribute( "type" ).toInt();
mEditTypes.insert( name, editType );
if ( editType == ValueMap && editTypeNode.hasChildNodes() )
{
mValueMaps.insert( name, QMap<QString, QVariant>() );
QDomNodeList valueMapNodes = editTypeNode.childNodes();
for ( int j = 0; j < valueMapNodes.size(); j++ )
{
QDomElement value = valueMapNodes.at( j ).toElement();
mValueMaps[ name ].insert( value.attribute( "key" ), value.attribute( "value" ) );
}
}
else if ( editType == EditRange || editType == SliderRange )
{
QVariant min = editTypeElement.attribute( "min" );
QVariant max = editTypeElement.attribute( "max" );
QVariant step = editTypeElement.attribute( "step" );
mRanges[ name ] = RangeData( min, max, step );
}
else if ( editType == CheckBox )
{
mCheckedStates[ name ] = QPair<QString, QString>( editTypeElement.attribute( "checked" ), editTypeElement.attribute( "unchecked" ) );
}
}
}
QDomNode editFormNode = node.namedItem( "editform" );
if ( !editFormNode.isNull() )
{
QDomElement e = editFormNode.toElement();
mEditForm = QgsProject::instance()->readPath( e.text() );
}
QDomNode editFormInitNode = node.namedItem( "editforminit" );
if ( !editFormInitNode.isNull() )
{
mEditFormInit = editFormInitNode.toElement().text();
}
QDomNode annotationFormNode = node.namedItem( "annotationform" );
if ( !annotationFormNode.isNull() )
{
QDomElement e = annotationFormNode.toElement();
mAnnotationForm = QgsProject::instance()->readPath( e.text() );
}
mAttributeAliasMap.clear();
QDomNode aliasesNode = node.namedItem( "aliases" );
if ( !aliasesNode.isNull() )
{
QDomElement aliasElem;
int index;
QString name;
QDomNodeList aliasNodeList = aliasesNode.toElement().elementsByTagName( "alias" );
for ( int i = 0; i < aliasNodeList.size(); ++i )
{
aliasElem = aliasNodeList.at( i ).toElement();
index = aliasElem.attribute( "index" ).toInt();
name = aliasElem.attribute( "name" );
mAttributeAliasMap.insert( index, name );
}
}
// Test if labeling is on or off
QDomNode labelnode = node.namedItem( "label" );
QDomElement element = labelnode.toElement();
int hasLabelsEnabled = element.text().toInt();
if ( hasLabelsEnabled < 1 )
{
enableLabels( false );
}
else
{
enableLabels( true );
}
QDomNode labelattributesnode = node.namedItem( "labelattributes" );
if ( !labelattributesnode.isNull() )
{
QgsDebugMsg( "qgsvectorlayer calling label readXML routine" );
mLabel->readXML( labelattributesnode );
}
return true;
}
bool QgsVectorLayer::writeSymbology( QDomNode& node, QDomDocument& doc, QString& errorMessage ) const
{
if ( mUsingRendererV2 )
{
QDomElement rendererElement = mRendererV2->save( doc );
node.appendChild( rendererElement );
}
else
{
//classification field(s)
QgsAttributeList attributes = mRenderer->classificationAttributes();
const QgsFieldMap providerFields = mDataProvider->fields();
for ( QgsAttributeList::const_iterator it = attributes.begin(); it != attributes.end(); ++it )
{
QDomElement classificationElement = doc.createElement( "classificationattribute" );
QDomText classificationText = doc.createTextNode( providerFields[*it].name() );
classificationElement.appendChild( classificationText );
node.appendChild( classificationElement );
}
// renderer settings
const QgsRenderer * myRenderer = renderer();
if ( myRenderer )
{
if ( !myRenderer->writeXML( node, doc, *this ) )
{
errorMessage = "renderer failed to save";
return false;
}
}
else
{
QgsDebugMsg( "no renderer" );
errorMessage = "no renderer";
return false;
}
}
// use scale dependent visibility flag
QDomElement mapLayerNode = node.toElement();
mapLayerNode.setAttribute( "scaleBasedLabelVisibilityFlag", label()->scaleBasedVisibility() ? 1 : 0 );
mapLayerNode.setAttribute( "minLabelScale", label()->minScale() );
mapLayerNode.setAttribute( "maxLabelScale", label()->maxScale() );
//edit types
if ( mEditTypes.size() > 0 )
{
QDomElement editTypesElement = doc.createElement( "edittypes" );
for ( QMap<QString, EditType>::const_iterator it = mEditTypes.begin(); it != mEditTypes.end(); ++it )
{
QDomElement editTypeElement = doc.createElement( "edittype" );
editTypeElement.setAttribute( "name", it.key() );
editTypeElement.setAttribute( "type", it.value() );
if ( it.value() == ValueMap )
{
if ( mValueMaps.contains( it.key() ) )
{
const QMap<QString, QVariant> &map = mValueMaps[ it.key()];
for ( QMap<QString, QVariant>::const_iterator vmit = map.begin(); vmit != map.end(); vmit++ )
{
QDomElement value = doc.createElement( "valuepair" );
value.setAttribute( "key", vmit.key() );
value.setAttribute( "value", vmit.value().toString() );
editTypeElement.appendChild( value );
}
}
}
else if ( it.value() == EditRange || it.value() == SliderRange )
{
if ( mRanges.contains( it.key() ) )
{
editTypeElement.setAttribute( "min", mRanges[ it.key()].mMin.toString() );
editTypeElement.setAttribute( "max", mRanges[ it.key()].mMax.toString() );
editTypeElement.setAttribute( "step", mRanges[ it.key()].mStep.toString() );
}
}
else if ( it.value() == CheckBox )
{
if ( mCheckedStates.contains( it.key() ) )
{
editTypeElement.setAttribute( "checked", mCheckedStates[ it.key()].first );
editTypeElement.setAttribute( "unchecked", mCheckedStates[ it.key()].second );
}
}
editTypesElement.appendChild( editTypeElement );
}
node.appendChild( editTypesElement );
}
QDomElement efField = doc.createElement( "editform" );
QDomText efText = doc.createTextNode( QgsProject::instance()->writePath( mEditForm ) );
efField.appendChild( efText );
node.appendChild( efField );
QDomElement efiField = doc.createElement( "editforminit" );
QDomText efiText = doc.createTextNode( mEditFormInit );
efiField.appendChild( efiText );
node.appendChild( efiField );
QDomElement afField = doc.createElement( "annotationform" );
QDomText afText = doc.createTextNode( QgsProject::instance()->writePath( mAnnotationForm ) );
afField.appendChild( afText );
node.appendChild( afField );
//attribute aliases
if ( mAttributeAliasMap.size() > 0 )
{
QDomElement aliasElem = doc.createElement( "aliases" );
QMap<int, QString>::const_iterator a_it = mAttributeAliasMap.constBegin();
for ( ; a_it != mAttributeAliasMap.constEnd(); ++a_it )
{
QDomElement aliasEntryElem = doc.createElement( "alias" );
aliasEntryElem.setAttribute( "index", QString::number( a_it.key() ) );
aliasEntryElem.setAttribute( "name", a_it.value() );
aliasElem.appendChild( aliasEntryElem );
}
node.appendChild( aliasElem );
}
// add the display field
QDomElement dField = doc.createElement( "displayfield" );
QDomText dFieldText = doc.createTextNode( displayField() );
dField.appendChild( dFieldText );
node.appendChild( dField );
// add label node
QDomElement labelElem = doc.createElement( "label" );
QDomText labelText = doc.createTextNode( "" );
if ( hasLabelsEnabled() )
{
labelText.setData( "1" );
}
else
{
labelText.setData( "0" );
}
labelElem.appendChild( labelText );
node.appendChild( labelElem );
// add attribute actions
mActions->writeXML( node, doc );
// Now we get to do all that all over again for QgsLabel
// XXX Since this is largely a cut-n-paste from the previous, this
// XXX therefore becomes a candidate to be generalized into a separate
// XXX function. I think.
const QgsLabel *myLabel = label();
if ( myLabel )
{
QString fieldname = myLabel->labelField( QgsLabel::Text );
if ( fieldname != "" )
{
dField = doc.createElement( "labelfield" );
dFieldText = doc.createTextNode( fieldname );
dField.appendChild( dFieldText );
node.appendChild( dField );
}
myLabel->writeXML( node, doc );
}
//save vector overlays (e.g. diagrams)
QList<QgsVectorOverlay*>::const_iterator overlay_it = mOverlays.constBegin();
for ( ; overlay_it != mOverlays.constEnd(); ++overlay_it )
{
if ( *overlay_it )
{
( *overlay_it )->writeXML( mapLayerNode, doc );
}
}
return true;
}
bool QgsVectorLayer::changeGeometry( int fid, QgsGeometry* geom )
{
if ( !mEditable || !mDataProvider )
{
return false;
}
editGeometryChange( fid, *geom );
mCachedGeometries[fid] = *geom;
setModified( true, true );
return true;
}
bool QgsVectorLayer::changeAttributeValue( int fid, int field, QVariant value, bool emitSignal )
{
if ( !isEditable() )
return false;
editAttributeChange( fid, field, value );
setModified( true, false );
if ( emitSignal )
emit attributeValueChanged( fid, field, value );
return true;
}
bool QgsVectorLayer::addAttribute( const QgsField &field )
{
if ( !isEditable() )
return false;
for ( QgsFieldMap::const_iterator it = mUpdatedFields.begin(); it != mUpdatedFields.end(); it++ )
{
if ( it.value().name() == field.name() )
return false;
}
if ( !mDataProvider->supportedType( field ) )
return false;
mMaxUpdatedIndex++;
if ( mActiveCommand != NULL )
{
mActiveCommand->storeAttributeAdd( mMaxUpdatedIndex, field );
}
mUpdatedFields.insert( mMaxUpdatedIndex, field );
mAddedAttributeIds.insert( mMaxUpdatedIndex );
setModified( true, false );
emit attributeAdded( mMaxUpdatedIndex );
return true;
}
bool QgsVectorLayer::addAttribute( QString name, QString type )
{
const QMap<QString, QVariant::Type> &map = mDataProvider->supportedNativeTypes();
if ( !map.contains( type ) )
return false;
return addAttribute( QgsField( name, map[ type ], type ) );
}
void QgsVectorLayer::addAttributeAlias( int attIndex, QString aliasString )
{
mAttributeAliasMap.insert( attIndex, aliasString );
emit layerModified( false );
}
QString QgsVectorLayer::attributeAlias( int attributeIndex ) const
{
QMap<int, QString>::const_iterator alias_it = mAttributeAliasMap.find( attributeIndex );
if ( alias_it != mAttributeAliasMap.constEnd() )
{
return alias_it.value();
}
else
{
return QString();
}
}
QString QgsVectorLayer::attributeDisplayName( int attributeIndex ) const
{
QString displayName = attributeAlias( attributeIndex );
if ( displayName.isEmpty() )
{
const QgsFieldMap& fields = pendingFields();
QgsFieldMap::const_iterator fieldIt = fields.find( attributeIndex );
if ( fieldIt != fields.constEnd() )
{
displayName = fieldIt->name();
}
}
return displayName;
}
bool QgsVectorLayer::deleteAttribute( int index )
{
if ( !isEditable() )
return false;
if ( mDeletedAttributeIds.contains( index ) )
return false;
if ( !mAddedAttributeIds.contains( index ) &&
!mDataProvider->fields().contains( index ) )
return false;
if ( mActiveCommand != NULL )
{
mActiveCommand->storeAttributeDelete( index, mUpdatedFields[index] );
}
mDeletedAttributeIds.insert( index );
mAddedAttributeIds.remove( index );
mUpdatedFields.remove( index );
mAttributeAliasMap.remove( index );
setModified( true, false );
emit attributeDeleted( index );
return true;
}
bool QgsVectorLayer::deleteFeature( int fid )
{
if ( !isEditable() )
return false;
if ( mDeletedFeatureIds.contains( fid ) )
return true;
mSelectedFeatureIds.remove( fid ); // remove it from selection
editFeatureDelete( fid );
setModified( true, false );
emit featureDeleted( fid );
return true;
}
const QgsFieldMap &QgsVectorLayer::pendingFields() const
{
return isEditable() ? mUpdatedFields : mDataProvider->fields();
}
QgsAttributeList QgsVectorLayer::pendingAllAttributesList()
{
return isEditable() ? mUpdatedFields.keys() : mDataProvider->attributeIndexes();
}
int QgsVectorLayer::pendingFeatureCount()
{
return mDataProvider->featureCount()
+ mAddedFeatures.size()
- mDeletedFeatureIds.size();
}
bool QgsVectorLayer::commitChanges()
{
bool success = true;
//clear the cache image so markers don't appear anymore on next draw
setCacheImage( 0 );
mCommitErrors.clear();
if ( !mDataProvider )
{
mCommitErrors << tr( "ERROR: no provider" );
return false;
}
if ( !isEditable() )
{
mCommitErrors << tr( "ERROR: layer not editable" );
return false;
}
int cap = mDataProvider->capabilities();
//
// delete attributes
//
bool attributesChanged = false;
if ( mDeletedAttributeIds.size() > 0 )
{
if (( cap & QgsVectorDataProvider::DeleteAttributes ) && mDataProvider->deleteAttributes( mDeletedAttributeIds ) )
{
mCommitErrors << tr( "SUCCESS: %n attribute(s) deleted.", "deleted attributes count", mDeletedAttributeIds.size() );
mDeletedAttributeIds.clear();
attributesChanged = true;
}
else
{
mCommitErrors << tr( "ERROR: %n attribute(s) not deleted.", "not deleted attributes count", mDeletedAttributeIds.size() );
success = false;
}
}
//
// add attributes
//
if ( mAddedAttributeIds.size() > 0 )
{
QList<QgsField> addedAttributes;
for ( QgsAttributeIds::const_iterator it = mAddedAttributeIds.begin(); it != mAddedAttributeIds.end(); it++ )
addedAttributes << mUpdatedFields[ *it ];
if (( cap & QgsVectorDataProvider::AddAttributes ) && mDataProvider->addAttributes( addedAttributes ) )
{
mCommitErrors << tr( "SUCCESS: %n attribute(s) added.", "added attributes count", mAddedAttributeIds.size() );
mAddedAttributeIds.clear();
attributesChanged = true;
}
else
{
mCommitErrors << tr( "ERROR: %n new attribute(s) not added", "not added attributes count", mAddedAttributeIds.size() );
success = false;
}
}
//
// remap changed and attributes of added features
//
bool attributeChangesOk = true;
if ( attributesChanged )
{
// map updates field indexes to names
QMap<int, QString> src;
for ( QgsFieldMap::const_iterator it = mUpdatedFields.begin(); it != mUpdatedFields.end(); it++ )
{
src[ it.key()] = it.value().name();
}
int maxAttrIdx = -1;
const QgsFieldMap &pFields = mDataProvider->fields();
// map provider table names to field indexes
QMap<QString, int> dst;
for ( QgsFieldMap::const_iterator it = pFields.begin(); it != pFields.end(); it++ )
{
dst[ it.value().name()] = it.key();
if ( it.key() > maxAttrIdx )
maxAttrIdx = it.key();
}
// if adding attributes failed add fields that are now missing
// (otherwise we'll loose updates when doing the remapping)
if ( mAddedAttributeIds.size() > 0 )
{
for ( QgsAttributeIds::const_iterator it = mAddedAttributeIds.begin(); it != mAddedAttributeIds.end(); it++ )
{
QString name = mUpdatedFields[ *it ].name();
if ( dst.contains( name ) )
{
// it's there => so we don't need to add it anymore
mAddedAttributeIds.remove( *it );
mCommitErrors << tr( "SUCCESS: attribute %1 was added." ).arg( name );
}
else
{
// field not there => put it behind the existing attributes
dst[ name ] = ++maxAttrIdx;
attributeChangesOk = false; // don't try attribute updates - they'll fail.
mCommitErrors << tr( "ERROR: attribute %1 not added" ).arg( name );
}
}
}
// map updated fields to provider fields
QMap<int, int> remap;
for ( QMap<int, QString>::const_iterator it = src.begin(); it != src.end(); it++ )
{
if ( dst.contains( it.value() ) )
{
remap[ it.key()] = dst[ it.value()];
}
}
// remap changed attributes
for ( QgsChangedAttributesMap::iterator fit = mChangedAttributeValues.begin(); fit != mChangedAttributeValues.end(); fit++ )
{
QgsAttributeMap &src = fit.value();
QgsAttributeMap dst;
for ( QgsAttributeMap::const_iterator it = src.begin(); it != src.end(); it++ )
{
if ( remap.contains( it.key() ) )
{
dst[ remap[it.key()] ] = it.value();
}
}
src = dst;
}
// remap features of added attributes
for ( QgsFeatureList::iterator fit = mAddedFeatures.begin(); fit != mAddedFeatures.end(); fit++ )
{
const QgsAttributeMap &src = fit->attributeMap();
QgsAttributeMap dst;
for ( QgsAttributeMap::const_iterator it = src.begin(); it != src.end(); it++ )
if ( remap.contains( it.key() ) )
dst[ remap[it.key()] ] = it.value();
fit->setAttributeMap( dst );
}
QgsFieldMap attributes;
// update private field map
for ( QMap<int, int>::iterator it = remap.begin(); it != remap.end(); it++ )
attributes[ it.value()] = mUpdatedFields[ it.key()];
mUpdatedFields = attributes;
}
if ( attributeChangesOk )
{
//
// change attributes
//
if ( mChangedAttributeValues.size() > 0 )
{
if (( cap & QgsVectorDataProvider::ChangeAttributeValues ) && mDataProvider->changeAttributeValues( mChangedAttributeValues ) )
{
mCommitErrors << tr( "SUCCESS: %n attribute value(s) changed.", "changed attribute values count", mChangedAttributeValues.size() );
mChangedAttributeValues.clear();
}
else
{
mCommitErrors << tr( "ERROR: %n attribute value change(s) not applied.", "not changed attribute values count", mChangedAttributeValues.size() );
success = false;
}
}
//
// add features
//
if ( mAddedFeatures.size() > 0 )
{
for ( int i = 0; i < mAddedFeatures.size(); i++ )
{
QgsFeature &f = mAddedFeatures[i];
if ( mDeletedFeatureIds.contains( f.id() ) )
{
mDeletedFeatureIds.remove( f.id() );
if ( mChangedGeometries.contains( f.id() ) )
mChangedGeometries.remove( f.id() );
mAddedFeatures.removeAt( i-- );
continue;
}
if ( mChangedGeometries.contains( f.id() ) )
{
f.setGeometry( mChangedGeometries.take( f.id() ) );
}
}
if (( cap & QgsVectorDataProvider::AddFeatures ) && mDataProvider->addFeatures( mAddedFeatures ) )
{
mCommitErrors << tr( "SUCCESS: %n feature(s) added.", "added features count", mAddedFeatures.size() );
mAddedFeatures.clear();
}
else
{
mCommitErrors << tr( "ERROR: %n feature(s) not added.", "not added features count", mAddedFeatures.size() );
success = false;
}
}
}
//
// update geometries
//
if ( mChangedGeometries.size() > 0 )
{
if (( cap & QgsVectorDataProvider::ChangeGeometries ) && mDataProvider->changeGeometryValues( mChangedGeometries ) )
{
mCommitErrors << tr( "SUCCESS: %n geometries were changed.", "changed geometries count", mChangedGeometries.size() );
mChangedGeometries.clear();
}
else
{
mCommitErrors << tr( "ERROR: %n geometries not changed.", "not changed geometries count", mChangedGeometries.size() );
success = false;
}
}
//
// delete features
//
if ( mDeletedFeatureIds.size() > 0 )
{
if (( cap & QgsVectorDataProvider::DeleteFeatures ) && mDataProvider->deleteFeatures( mDeletedFeatureIds ) )
{
mCommitErrors << tr( "SUCCESS: %n feature(s) deleted.", "deleted features count", mDeletedFeatureIds.size() );
for ( QgsFeatureIds::const_iterator it = mDeletedFeatureIds.begin(); it != mDeletedFeatureIds.end(); it++ )
{
mChangedAttributeValues.remove( *it );
mChangedGeometries.remove( *it );
}
mDeletedFeatureIds.clear();
}
else
{
mCommitErrors << tr( "ERROR: %n feature(s) not deleted.", "not deleted features count", mDeletedFeatureIds.size() );
success = false;
}
}
deleteCachedGeometries();
if ( success )
{
mEditable = false;
setModified( false );
mUpdatedFields.clear();
mMaxUpdatedIndex = -1;
undoStack()->clear();
emit editingStopped();
}
mDataProvider->updateExtents();
triggerRepaint();
QgsDebugMsg( "result:\n " + mCommitErrors.join( "\n " ) );
return success;
}
const QStringList &QgsVectorLayer::commitErrors()
{
return mCommitErrors;
}
bool QgsVectorLayer::rollBack()
{
if ( !isEditable() )
{
return false;
}
if ( isModified() )
{
while ( mAddedAttributeIds.size() > 0 )
{
int idx = *mAddedAttributeIds.begin();
mAddedAttributeIds.remove( idx );
mUpdatedFields.remove( idx );
emit attributeDeleted( idx );
}
while ( mDeletedAttributeIds.size() > 0 )
{
int idx = *mDeletedAttributeIds.begin();
mDeletedAttributeIds.remove( idx );
emit attributeAdded( idx );
}
// roll back changed attribute values
mChangedAttributeValues.clear();
// roll back changed geometries
mChangedGeometries.clear();
// Roll back added features
// Delete the features themselves before deleting the references to them.
mAddedFeatures.clear();
// Roll back deleted features
mDeletedFeatureIds.clear();
// clear private field map
mUpdatedFields.clear();
mMaxUpdatedIndex = -1;
}
deleteCachedGeometries();
undoStack()->clear();
mEditable = false;
emit editingStopped();
setModified( false );
// invalidate the cache so the layer updates properly to show its original
// after the rollback
setCacheImage( 0 );
triggerRepaint();
return true;
}
void QgsVectorLayer::setSelectedFeatures( const QgsFeatureIds& ids )
{
// TODO: check whether features with these ID exist
mSelectedFeatureIds = ids;
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
}
int QgsVectorLayer::selectedFeatureCount()
{
return mSelectedFeatureIds.size();
}
const QgsFeatureIds& QgsVectorLayer::selectedFeaturesIds() const
{
return mSelectedFeatureIds;
}
QgsFeatureList QgsVectorLayer::selectedFeatures()
{
if ( !mDataProvider )
{
return QgsFeatureList();
}
QgsFeatureList features;
QgsAttributeList allAttrs = mDataProvider->attributeIndexes();
for ( QgsFeatureIds::iterator it = mSelectedFeatureIds.begin(); it != mSelectedFeatureIds.end(); ++it )
{
QgsFeature feat;
bool selectionIsAddedFeature = false;
// Check this selected item against the uncommitted added features
for ( QgsFeatureList::iterator iter = mAddedFeatures.begin(); iter != mAddedFeatures.end(); ++iter )
{
if ( *it == iter->id() )
{
feat = QgsFeature( *iter );
selectionIsAddedFeature = true;
break;
}
}
// if the geometry is not newly added, get it from provider
if ( !selectionIsAddedFeature )
{
mDataProvider->featureAtId( *it, feat, true, allAttrs );
}
updateFeatureAttributes( feat );
updateFeatureGeometry( feat );
features << feat;
} // for each selected
return features;
}
bool QgsVectorLayer::addFeatures( QgsFeatureList features, bool makeSelected )
{
if ( !mDataProvider )
{
return false;
}
if ( !( mDataProvider->capabilities() & QgsVectorDataProvider::AddFeatures ) )
{
return false;
}
if ( !isEditable() )
{
return false;
}
if ( makeSelected )
{
mSelectedFeatureIds.clear();
}
for ( QgsFeatureList::iterator iter = features.begin(); iter != features.end(); ++iter )
{
addFeature( *iter );
if ( makeSelected )
{
mSelectedFeatureIds.insert( iter->id() );
}
}
updateExtents();
if ( makeSelected )
{
// invalidate cache
setCacheImage( 0 );
emit selectionChanged();
}
return true;
}
bool QgsVectorLayer::copySymbologySettings( const QgsMapLayer& other )
{
const QgsVectorLayer* vl = qobject_cast<const QgsVectorLayer *>( &other );
// exit if both vectorlayer are the same
if ( this == vl )
{
return false;
}
if ( !vl )
{
return false;
}
delete mRenderer;
QgsRenderer* r = vl->mRenderer;
if ( r )
{
mRenderer = r->clone();
return true;
}
else
{
return false;
}
}
bool QgsVectorLayer::hasCompatibleSymbology( const QgsMapLayer& other ) const
{
// vector layers are symbology compatible if they have the same type, the same sequence of numerical/ non numerical fields and the same field names
const QgsVectorLayer* otherVectorLayer = qobject_cast<const QgsVectorLayer *>( &other );
if ( otherVectorLayer )
{
if ( otherVectorLayer->type() != type() )
{
return false;
}
const QgsFieldMap& fieldsThis = mDataProvider->fields();
const QgsFieldMap& fieldsOther = otherVectorLayer ->mDataProvider->fields();
if ( fieldsThis.size() != fieldsOther.size() )
{
return false;
}
// TODO: fill two sets with the numerical types for both layers
uint fieldsThisSize = fieldsThis.size();
for ( uint i = 0; i < fieldsThisSize; ++i )
{
if ( fieldsThis[i].name() != fieldsOther[i].name() ) // field names need to be the same
{
return false;
}
// TODO: compare types of the fields
}
return true; // layers are symbology compatible if the code reaches this point
}
return false;
}
bool QgsVectorLayer::snapPoint( QgsPoint& point, double tolerance )
{
QMultiMap<double, QgsSnappingResult> snapResults;
int result = snapWithContext( point, tolerance, snapResults, QgsSnapper::SnapToVertex );
if ( result != 0 )
{
return false;
}
if ( snapResults.size() < 1 )
{
return false;
}
QMultiMap<double, QgsSnappingResult>::const_iterator snap_it = snapResults.constBegin();
point.setX( snap_it.value().snappedVertex.x() );
point.setY( snap_it.value().snappedVertex.y() );
return true;
}
int QgsVectorLayer::snapWithContext( const QgsPoint& startPoint, double snappingTolerance,
QMultiMap<double, QgsSnappingResult>& snappingResults,
QgsSnapper::SnappingType snap_to )
{
if ( snappingTolerance <= 0 || !mDataProvider )
{
return 1;
}
QList<QgsFeature> featureList;
QgsRectangle searchRect( startPoint.x() - snappingTolerance, startPoint.y() - snappingTolerance,
startPoint.x() + snappingTolerance, startPoint.y() + snappingTolerance );
double sqrSnappingTolerance = snappingTolerance * snappingTolerance;
int n = 0;
QgsFeature f;
if ( mCachedGeometriesRect.contains( searchRect ) )
{
QgsDebugMsg( "Using cached geometries for snapping." );
QgsGeometryMap::iterator it = mCachedGeometries.begin();
for ( ; it != mCachedGeometries.end() ; ++it )
{
QgsGeometry* g = &( it.value() );
if ( g->boundingBox().intersects( searchRect ) )
{
snapToGeometry( startPoint, it.key(), g, sqrSnappingTolerance, snappingResults, snap_to );
++n;
}
}
}
else
{
// snapping outside cached area
select( QgsAttributeList(), searchRect, true, true );
while ( nextFeature( f ) )
{
snapToGeometry( startPoint, f.id(), f.geometry(), sqrSnappingTolerance, snappingResults, snap_to );
++n;
}
}
return n == 0 ? 2 : 0;
}
void QgsVectorLayer::snapToGeometry( const QgsPoint& startPoint, int featureId, QgsGeometry* geom, double sqrSnappingTolerance,
QMultiMap<double, QgsSnappingResult>& snappingResults, QgsSnapper::SnappingType snap_to ) const
{
if ( !geom )
{
return;
}
int atVertex, beforeVertex, afterVertex;
double sqrDistVertexSnap, sqrDistSegmentSnap;
QgsPoint snappedPoint;
QgsSnappingResult snappingResultVertex;
QgsSnappingResult snappingResultSegment;
if ( snap_to == QgsSnapper::SnapToVertex || snap_to == QgsSnapper::SnapToVertexAndSegment )
{
snappedPoint = geom->closestVertex( startPoint, atVertex, beforeVertex, afterVertex, sqrDistVertexSnap );
if ( sqrDistVertexSnap < sqrSnappingTolerance )
{
snappingResultVertex.snappedVertex = snappedPoint;
snappingResultVertex.snappedVertexNr = atVertex;
snappingResultVertex.beforeVertexNr = beforeVertex;
if ( beforeVertex != -1 ) // make sure the vertex is valid
{
snappingResultVertex.beforeVertex = geom->vertexAt( beforeVertex );
}
snappingResultVertex.afterVertexNr = afterVertex;
if ( afterVertex != -1 ) // make sure the vertex is valid
{
snappingResultVertex.afterVertex = geom->vertexAt( afterVertex );
}
snappingResultVertex.snappedAtGeometry = featureId;
snappingResultVertex.layer = this;
snappingResults.insert( sqrt( sqrDistVertexSnap ), snappingResultVertex );
return;
}
}
if ( snap_to == QgsSnapper::SnapToSegment || snap_to == QgsSnapper::SnapToVertexAndSegment ) // snap to segment
{
if ( geometryType() != QGis::Point ) // cannot snap to segment for points/multipoints
{
sqrDistSegmentSnap = geom->closestSegmentWithContext( startPoint, snappedPoint, afterVertex );
if ( sqrDistSegmentSnap < sqrSnappingTolerance )
{
snappingResultSegment.snappedVertex = snappedPoint;
snappingResultSegment.snappedVertexNr = -1;
snappingResultSegment.beforeVertexNr = afterVertex - 1;
snappingResultSegment.afterVertexNr = afterVertex;
snappingResultSegment.snappedAtGeometry = featureId;
snappingResultSegment.beforeVertex = geom->vertexAt( afterVertex - 1 );
snappingResultSegment.afterVertex = geom->vertexAt( afterVertex );
snappingResultSegment.layer = this;
snappingResults.insert( sqrt( sqrDistSegmentSnap ), snappingResultSegment );
}
}
}
}
int QgsVectorLayer::insertSegmentVerticesForSnap( const QList<QgsSnappingResult>& snapResults )
{
int returnval = 0;
QgsPoint layerPoint;
QList<QgsSnappingResult>::const_iterator it = snapResults.constBegin();
for ( ; it != snapResults.constEnd(); ++it )
{
if ( it->snappedVertexNr == -1 ) // segment snap
{
layerPoint = it->snappedVertex;
if ( !insertVertex( layerPoint.x(), layerPoint.y(), it->snappedAtGeometry, it->afterVertexNr ) )
{
returnval = 3;
}
}
}
return returnval;
}
int QgsVectorLayer::boundingBoxFromPointList( const QList<QgsPoint>& list, double& xmin, double& ymin, double& xmax, double& ymax ) const
{
if ( list.size() < 1 )
{
return 1;
}
xmin = std::numeric_limits<double>::max();
xmax = -std::numeric_limits<double>::max();
ymin = std::numeric_limits<double>::max();
ymax = -std::numeric_limits<double>::max();
for ( QList<QgsPoint>::const_iterator it = list.constBegin(); it != list.constEnd(); ++it )
{
if ( it->x() < xmin )
{
xmin = it->x();
}
if ( it->x() > xmax )
{
xmax = it->x();
}
if ( it->y() < ymin )
{
ymin = it->y();
}
if ( it->y() > ymax )
{
ymax = it->y();
}
}
return 0;
}
QgsVectorLayer::VertexMarkerType QgsVectorLayer::currentVertexMarkerType()
{
QSettings settings;
QString markerTypeString = settings.value( "/qgis/digitizing/marker_style", "Cross" ).toString();
if ( markerTypeString == "Cross" )
{
return QgsVectorLayer::Cross;
}
else if ( markerTypeString == "SemiTransparentCircle" )
{
return QgsVectorLayer::SemiTransparentCircle;
}
else
{
return QgsVectorLayer::NoMarker;
}
}
int QgsVectorLayer::currentVertexMarkerSize()
{
QSettings settings;
return settings.value( "/qgis/digitizing/marker_size", 3 ).toInt();
}
void QgsVectorLayer::drawFeature( QgsRenderContext &renderContext,
QgsFeature& fet,
QImage * marker )
{
QPainter *p = renderContext.painter();
// Only have variables, etc outside the switch() statement that are
// used in all cases of the statement (otherwise they may get
// executed, but never used, in a bit of code where performance is
// critical).
if ( ! fet.isValid() ) { return; }
bool needToTrim = false;
QgsGeometry* geom = fet.geometry();
unsigned char* feature = geom->asWkb();
QGis::WkbType wkbType = geom->wkbType();
switch ( wkbType )
{
case QGis::WKBPoint:
case QGis::WKBPoint25D:
{
double x = *(( double * )( feature + 5 ) );
double y = *(( double * )( feature + 5 + sizeof( double ) ) );
transformPoint( x, y, &renderContext.mapToPixel(), renderContext.coordinateTransform() );
if ( std::abs( x ) > QgsClipper::MAX_X ||
std::abs( y ) > QgsClipper::MAX_Y )
{
break;
}
//QPointF pt(x - (marker->width()/2), y - (marker->height()/2));
QPointF pt( x*renderContext.rasterScaleFactor() - ( marker->width() / 2 ),
y*renderContext.rasterScaleFactor() - ( marker->height() / 2 ) );
p->save();
//p->scale(markerScaleFactor,markerScaleFactor);
p->scale( 1.0 / renderContext.rasterScaleFactor(), 1.0 / renderContext.rasterScaleFactor() );
p->drawImage( pt, *marker );
p->restore();
break;
}
case QGis::WKBMultiPoint:
case QGis::WKBMultiPoint25D:
{
unsigned char *ptr = feature + 5;
unsigned int nPoints = *(( int* )ptr );
ptr += 4;
p->save();
//p->scale(markerScaleFactor, markerScaleFactor);
p->scale( 1.0 / renderContext.rasterScaleFactor(), 1.0 / renderContext.rasterScaleFactor() );
for ( register unsigned int i = 0; i < nPoints; ++i )
{
ptr += 5;
double x = *(( double * ) ptr );
ptr += sizeof( double );
double y = *(( double * ) ptr );
ptr += sizeof( double );
if ( wkbType == QGis::WKBMultiPoint25D ) // ignore Z value
ptr += sizeof( double );
transformPoint( x, y, &renderContext.mapToPixel(), renderContext.coordinateTransform() );
//QPointF pt(x - (marker->width()/2), y - (marker->height()/2));
//QPointF pt(x/markerScaleFactor - (marker->width()/2), y/markerScaleFactor - (marker->height()/2));
QPointF pt( x*renderContext.rasterScaleFactor() - ( marker->width() / 2 ),
y*renderContext.rasterScaleFactor() - ( marker->height() / 2 ) );
//QPointF pt( x, y );
// Work around a +/- 32768 limitation on coordinates
if ( std::abs( x ) > QgsClipper::MAX_X ||
std::abs( y ) > QgsClipper::MAX_Y )
needToTrim = true;
else
p->drawImage( pt, *marker );
}
p->restore();
break;
}
case QGis::WKBLineString:
case QGis::WKBLineString25D:
{
drawLineString( feature, renderContext );
break;
}
case QGis::WKBMultiLineString:
case QGis::WKBMultiLineString25D:
{
unsigned char* ptr = feature + 5;
unsigned int numLineStrings = *(( int* )ptr );
ptr = feature + 9;
for ( register unsigned int jdx = 0; jdx < numLineStrings; jdx++ )
{
ptr = drawLineString( ptr, renderContext );
}
break;
}
case QGis::WKBPolygon:
case QGis::WKBPolygon25D:
{
drawPolygon( feature, renderContext );
break;
}
case QGis::WKBMultiPolygon:
case QGis::WKBMultiPolygon25D:
{
unsigned char *ptr = feature + 5;
unsigned int numPolygons = *(( int* )ptr );
ptr = feature + 9;
for ( register unsigned int kdx = 0; kdx < numPolygons; kdx++ )
ptr = drawPolygon( ptr, renderContext );
break;
}
default:
QgsDebugMsg( "Unknown WkbType ENCOUNTERED" );
break;
}
}
void QgsVectorLayer::setCoordinateSystem()
{
QgsDebugMsg( "----- Computing Coordinate System" );
//
// Get the layers project info and set up the QgsCoordinateTransform
// for this layer
//
// get CRS directly from provider
*mCRS = mDataProvider->crs();
//QgsCoordinateReferenceSystem provides a mechanism for FORCE a srs to be valid
//which is inolves falling back to system, project or user selected
//defaults if the srs is not properly intialised.
//we only nee to do that if the srs is not alreay valid
if ( !mCRS->isValid() )
{
mCRS->validate();
}
}
// Convenience function to transform the given point
inline void QgsVectorLayer::transformPoint(
double& x, double& y,
const QgsMapToPixel* mtp,
const QgsCoordinateTransform* ct )
{
// transform the point
if ( ct )
{
double z = 0;
ct->transformInPlace( x, y, z );
}
// transform from projected coordinate system to pixel
// position on map canvas
mtp->transformInPlace( x, y );
}
inline void QgsVectorLayer::transformPoints(
std::vector<double>& x, std::vector<double>& y, std::vector<double>& z,
QgsRenderContext &renderContext )
{
// transform the point
if ( renderContext.coordinateTransform() )
renderContext.coordinateTransform()->transformInPlace( x, y, z );
// transform from projected coordinate system to pixel
// position on map canvas
renderContext.mapToPixel().transformInPlace( x, y );
}
const QString QgsVectorLayer::displayField() const
{
return mDisplayField;
}
bool QgsVectorLayer::isEditable() const
{
return ( mEditable && mDataProvider );
}
bool QgsVectorLayer::isModified() const
{
return mModified;
}
void QgsVectorLayer::setModified( bool modified, bool onlyGeometry )
{
mModified = modified;
emit layerModified( onlyGeometry );
}
QgsVectorLayer::EditType QgsVectorLayer::editType( int idx )
{
const QgsFieldMap &fields = pendingFields();
if ( fields.contains( idx ) && mEditTypes.contains( fields[idx].name() ) )
return mEditTypes[ fields[idx].name()];
else
return LineEdit;
}
void QgsVectorLayer::setEditType( int idx, EditType type )
{
const QgsFieldMap &fields = pendingFields();
if ( fields.contains( idx ) )
mEditTypes[ fields[idx].name()] = type;
}
QString QgsVectorLayer::editForm()
{
return mEditForm;
}
void QgsVectorLayer::setEditForm( QString ui )
{
mEditForm = ui;
}
void QgsVectorLayer::setAnnotationForm( const QString& ui )
{
mAnnotationForm = ui;
}
QString QgsVectorLayer::editFormInit()
{
return mEditFormInit;
}
void QgsVectorLayer::setEditFormInit( QString function )
{
mEditFormInit = function;
}
QMap< QString, QVariant > &QgsVectorLayer::valueMap( int idx )
{
const QgsFieldMap &fields = pendingFields();
// FIXME: throw an exception!?
if ( !fields.contains( idx ) )
{
QgsDebugMsg( QString( "field %1 not found" ).arg( idx ) );
}
if ( !mValueMaps.contains( fields[idx].name() ) )
mValueMaps[ fields[idx].name()] = QMap<QString, QVariant>();
return mValueMaps[ fields[idx].name()];
}
QgsVectorLayer::RangeData &QgsVectorLayer::range( int idx )
{
const QgsFieldMap &fields = pendingFields();
// FIXME: throw an exception!?
if ( fields.contains( idx ) )
{
QgsDebugMsg( QString( "field %1 not found" ).arg( idx ) );
}
if ( !mRanges.contains( fields[idx].name() ) )
mRanges[ fields[idx].name()] = RangeData();
return mRanges[ fields[idx].name()];
}
void QgsVectorLayer::addOverlay( QgsVectorOverlay* overlay )
{
mOverlays.push_back( overlay );
}
void QgsVectorLayer::removeOverlay( const QString& typeName )
{
for ( int i = mOverlays.size() - 1; i >= 0; --i )
{
if ( mOverlays.at( i )->typeName() == typeName )
{
mOverlays.removeAt( i );
}
}
}
void QgsVectorLayer::vectorOverlays( QList<QgsVectorOverlay*>& overlayList )
{
overlayList = mOverlays;
}
QgsVectorOverlay* QgsVectorLayer::findOverlayByType( const QString& typeName )
{
QList<QgsVectorOverlay*>::iterator it = mOverlays.begin();
for ( ; it != mOverlays.end(); ++it )
{
if (( *it )->typeName() == typeName )
{
return *it;
}
}
return 0; //not found
}
QgsFeatureRendererV2* QgsVectorLayer::rendererV2()
{
return mRendererV2;
}
void QgsVectorLayer::setRendererV2( QgsFeatureRendererV2* r )
{
delete mRendererV2;
mRendererV2 = r;
}
bool QgsVectorLayer::isUsingRendererV2()
{
return mUsingRendererV2;
}
void QgsVectorLayer::setUsingRendererV2( bool usingRendererV2 )
{
mUsingRendererV2 = usingRendererV2;
}
void QgsVectorLayer::editGeometryChange( int featureId, QgsGeometry& geometry )
{
if ( mActiveCommand != NULL )
{
mActiveCommand->storeGeometryChange( featureId, mChangedGeometries[ featureId ], geometry );
}
mChangedGeometries[ featureId ] = geometry;
}
void QgsVectorLayer::editFeatureAdd( QgsFeature& feature )
{
if ( mActiveCommand != NULL )
{
mActiveCommand->storeFeatureAdd( feature );
}
mAddedFeatures.append( feature );
}
void QgsVectorLayer::editFeatureDelete( int featureId )
{
if ( mActiveCommand != NULL )
{
mActiveCommand->storeFeatureDelete( featureId );
}
mDeletedFeatureIds.insert( featureId );
}
void QgsVectorLayer::editAttributeChange( int featureId, int field, QVariant value )
{
if ( mActiveCommand != NULL )
{
QVariant original;
bool isFirstChange = true;
if ( featureId < 0 )
{
// work with added feature
for ( int i = 0; i < mAddedFeatures.size(); i++ )
{
if ( mAddedFeatures[i].id() == featureId && mAddedFeatures[i].attributeMap().contains( field ) )
{
original = mAddedFeatures[i].attributeMap()[field];
isFirstChange = false;
break;
}
}
}
else
{
if ( mChangedAttributeValues.contains( featureId ) && mChangedAttributeValues[featureId].contains( field ) )
{
original = mChangedAttributeValues[featureId][field];
isFirstChange = false;
}
}
mActiveCommand->storeAttributeChange( featureId, field, original, value, isFirstChange );
}
if ( featureId >= 0 )
{
// changed attribute of existing feature
if ( !mChangedAttributeValues.contains( featureId ) )
{
mChangedAttributeValues.insert( featureId, QgsAttributeMap() );
}
mChangedAttributeValues[featureId].insert( field, value );
}
else
{
// updated added feature
for ( int i = 0; i < mAddedFeatures.size(); i++ )
{
if ( mAddedFeatures[i].id() == featureId )
{
mAddedFeatures[i].changeAttribute( field, value );
break;
}
}
}
}
void QgsVectorLayer::beginEditCommand( QString text )
{
if ( mActiveCommand == NULL )
{
mActiveCommand = new QgsUndoCommand( this, text );
}
}
void QgsVectorLayer::endEditCommand()
{
if ( mActiveCommand != NULL )
{
undoStack()->push( mActiveCommand );
mActiveCommand = NULL;
}
}
void QgsVectorLayer::destroyEditCommand()
{
if ( mActiveCommand != NULL )
{
undoEditCommand( mActiveCommand );
delete mActiveCommand;
mActiveCommand = NULL;
}
}
void QgsVectorLayer::redoEditCommand( QgsUndoCommand* cmd )
{
QMap<int, QgsUndoCommand::GeometryChangeEntry>& geometryChange = cmd->mGeometryChange;
QgsFeatureIds& deletedFeatureIdChange = cmd->mDeletedFeatureIdChange;
QgsFeatureList& addedFeatures = cmd->mAddedFeatures;
QMap<int, QgsUndoCommand::AttributeChanges>& attributeChange = cmd->mAttributeChange;
QgsFieldMap& addedAttributes = cmd->mAddedAttributes;
QgsFieldMap& deletedAttributes = cmd->mDeletedAttributes;
// geometry changes
QMap<int, QgsUndoCommand::GeometryChangeEntry>::iterator it = geometryChange.begin();
for ( ; it != geometryChange.end(); ++it )
{
if ( it.value().target == NULL )
{
mChangedGeometries.remove( it.key() );
}
else
{
mChangedGeometries[it.key()] = *( it.value().target );
}
}
// deleted features
QgsFeatureIds::iterator delIt = deletedFeatureIdChange.begin();
for ( ; delIt != deletedFeatureIdChange.end(); ++delIt )
{
mDeletedFeatureIds.insert( *delIt );
}
// added features
QgsFeatureList::iterator addIt = addedFeatures.begin();
for ( ; addIt != addedFeatures.end(); ++addIt )
{
mAddedFeatures.append( *addIt );
}
// changed attributes
QMap<int, QgsUndoCommand::AttributeChanges>::iterator attrFeatIt = attributeChange.begin();
for ( ; attrFeatIt != attributeChange.end(); ++attrFeatIt )
{
int fid = attrFeatIt.key();
// for every changed attribute in feature
QMap<int, QgsUndoCommand::AttributeChangeEntry>::iterator attrChIt = attrFeatIt.value().begin();
for ( ; attrChIt != attrFeatIt.value().end(); ++attrChIt )
{
if ( fid >= 0 )
{
// existing feature
if ( attrChIt.value().target.isNull() )
{
mChangedAttributeValues[fid].remove( attrChIt.key() );
}
else
{
mChangedAttributeValues[fid][attrChIt.key()] = attrChIt.value().target;
QgsFeature f;
featureAtId( fid, f, false, true );
f.changeAttribute( attrChIt.key(), attrChIt.value().target );
}
}
else
{
// added feature
for ( int i = 0; i < mAddedFeatures.size(); i++ )
{
if ( mAddedFeatures[i].id() == fid )
{
mAddedFeatures[i].changeAttribute( attrChIt.key(), attrChIt.value().target );
break;
}
}
}
}
}
// added attributes
QgsFieldMap::iterator attrIt = addedAttributes.begin();
for ( ; attrIt != addedAttributes.end(); ++attrIt )
{
int attrIndex = attrIt.key();
mAddedAttributeIds.insert( attrIndex );
mUpdatedFields.insert( attrIndex, attrIt.value() );
}
// deleted attributes
QgsFieldMap::iterator dAttrIt = deletedAttributes.begin();
for ( ; dAttrIt != deletedAttributes.end(); ++dAttrIt )
{
int attrIndex = dAttrIt.key();
mDeletedAttributeIds.insert( attrIndex );
mUpdatedFields.remove( attrIndex );
}
setModified( true );
// it's not ideal to trigger refresh from here
triggerRepaint();
}
void QgsVectorLayer::undoEditCommand( QgsUndoCommand* cmd )
{
QMap<int, QgsUndoCommand::GeometryChangeEntry>& geometryChange = cmd->mGeometryChange;
QgsFeatureIds& deletedFeatureIdChange = cmd->mDeletedFeatureIdChange;
QgsFeatureList& addedFeatures = cmd->mAddedFeatures;
QMap<int, QgsUndoCommand::AttributeChanges>& attributeChange = cmd->mAttributeChange;
QgsFieldMap& addedAttributes = cmd->mAddedAttributes;
QgsFieldMap& deletedAttributes = cmd->mDeletedAttributes;
// deleted attributes
QgsFieldMap::iterator dAttrIt = deletedAttributes.begin();
for ( ; dAttrIt != deletedAttributes.end(); ++dAttrIt )
{
int attrIndex = dAttrIt.key();
mDeletedAttributeIds.remove( attrIndex );
mUpdatedFields.insert( attrIndex, dAttrIt.value() );
}
// added attributes
QgsFieldMap::iterator attrIt = addedAttributes.begin();
for ( ; attrIt != addedAttributes.end(); ++attrIt )
{
int attrIndex = attrIt.key();
mAddedAttributeIds.remove( attrIndex );
mUpdatedFields.remove( attrIndex );
}
// geometry changes
QMap<int, QgsUndoCommand::GeometryChangeEntry>::iterator it = geometryChange.begin();
for ( ; it != geometryChange.end(); ++it )
{
if ( it.value().original == NULL )
{
mChangedGeometries.remove( it.key() );
}
else
{
mChangedGeometries[it.key()] = *( it.value().original );
}
}
// deleted features
QgsFeatureIds::iterator delIt = deletedFeatureIdChange.begin();
for ( ; delIt != deletedFeatureIdChange.end(); ++delIt )
{
mDeletedFeatureIds.remove( *delIt );
}
// added features
QgsFeatureList::iterator addIt = addedFeatures.begin();
for ( ; addIt != addedFeatures.end(); ++addIt )
{
QgsFeatureList::iterator addedIt = mAddedFeatures.begin();
for ( ; addedIt != mAddedFeatures.end(); ++addedIt )
{
if ( addedIt->id() == addIt->id() )
{
mAddedFeatures.erase( addedIt );
break; // feature was found so move to next one
}
}
}
// updated attributes
QMap<int, QgsUndoCommand::AttributeChanges>::iterator attrFeatIt = attributeChange.begin();
for ( ; attrFeatIt != attributeChange.end(); ++attrFeatIt )
{
int fid = attrFeatIt.key();
QMap<int, QgsUndoCommand::AttributeChangeEntry>::iterator attrChIt = attrFeatIt.value().begin();
for ( ; attrChIt != attrFeatIt.value().end(); ++attrChIt )
{
if ( fid >= 0 )
{
if ( attrChIt.value().isFirstChange )
{
mChangedAttributeValues[fid].remove( attrChIt.key() );
}
else
{
mChangedAttributeValues[fid][attrChIt.key()] = attrChIt.value().original;
}
}
else
{
// added feature TODO:
for ( int i = 0; i < mAddedFeatures.size(); i++ )
{
if ( mAddedFeatures[i].id() == fid )
{
mAddedFeatures[i].changeAttribute( attrChIt.key(), attrChIt.value().original );
break;
}
}
}
emit attributeValueChanged( fid, attrChIt.key(), attrChIt.value().original );
}
}
setModified( true );
// it's not ideal to trigger refresh from here
triggerRepaint();
}
void QgsVectorLayer::setCheckedState( int idx, QString checked, QString unchecked )
{
const QgsFieldMap &fields = pendingFields();
if ( fields.contains( idx ) )
mCheckedStates[ fields[idx].name()] = QPair<QString, QString>( checked, unchecked );
}
QPair<QString, QString> QgsVectorLayer::checkedState( int idx )
{
const QgsFieldMap &fields = pendingFields();
if ( fields.contains( idx ) && mCheckedStates.contains( fields[idx].name() ) )
return mCheckedStates[ fields[idx].name()];
else
return QPair<QString, QString>( "1", "0" );
}
int QgsVectorLayer::fieldNameIndex( const QString& fieldName ) const
{
const QgsFieldMap &theFields = pendingFields();
for ( QgsFieldMap::const_iterator it = theFields.constBegin(); it != theFields.constEnd(); ++it )
{
if ( it->name() == fieldName )
{
return it.key();
}
}
return -1;
}
void QgsVectorLayer::stopRendererV2( QgsRenderContext& rendererContext, QgsSingleSymbolRendererV2* selRenderer )
{
mRendererV2->stopRender( rendererContext );
if ( selRenderer )
{
selRenderer->stopRender( rendererContext );
delete selRenderer;
}
}