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QGIS/src/qgisapp.cpp
gsherman c65a49cfec legend mods 
git-svn-id: http://svn.osgeo.org/qgis/trunk@86 c8812cc2-4d05-0410-92ff-de0c093fc19c
2002-08-04 06:30:34 +00:00

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/***************************************************************************
qgisapp.cpp - description
-------------------
begin : Sat Jun 22 2002
copyright : (C) 2002 by Gary E.Sherman
email : sherman@mrcc.com
Romans 3:23=>Romans 6:23=>Romans 10:9,10=>Romans 12
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <qapplication.h>
#include <qcanvas.h>
#include <qcolor.h>
#include <qscrollview.h>
#include <qstringlist.h>
#include <qmessagebox.h>
#include <qstatusbar.h>
#include <qfiledialog.h>
#include <qfileinfo.h>
#include <qpixmap.h>
#include <qsplitter.h>
#include <qrect.h>
#include <qpoint.h>
#include <qpainter.h>
#include <qlayout.h>
#include <qwmatrix.h>
#include <qfiledialog.h>
#include <qvbox.h>
#include <libpq++.h>
#include <iostream>
#include <iomanip>
#include "qgsrect.h"
#include "qgsmapcanvas.h"
#include "qgslegend.h"
#include "qgsdbsourceselect.h"
#include "qgsdatabaselayer.h"
#include "qgsshapefilelayer.h"
#include "qgis.h"
#include "qgisapp.h"
#include "xpm/qgis.xpm"
#include <ogrsf_frmts.h>
QgisApp::QgisApp (QWidget * parent, const char *name,
WFlags fl):QgisAppBase (parent, name, fl)
{
OGRRegisterAll ();
QPixmap icon;
icon = QPixmap (qgis_xpm);
setIcon (icon);
QGridLayout *FrameLayout =
new QGridLayout (frameMain, 1, 2, 4, 6, "mainFrameLayout");
QSplitter *split = new QSplitter (frameMain);
mapLegend = new QgsLegend (split); //frameMain);
//add a canvas
mapCanvas = new QgsMapCanvas (split);
// resize it to fit in the frame
// QRect r = frmCanvas->rect();
// canvas->resize(r.width(), r.height());
mapCanvas->setBackgroundColor (Qt::white); //QColor (220, 235, 255));
mapCanvas->setMinimumWidth (400);
FrameLayout->addWidget (split, 0, 0);
mapLegend->setBackgroundColor (QColor (192, 192, 192));
mapLegend->setMapCanvas(mapCanvas);
connect (mapCanvas, SIGNAL (xyCoordinates (QgsPoint &)), this,
SLOT (showMouseCoordinate (QgsPoint &)));
}
QgisApp::~QgisApp ()
{
}
void QgisApp::addLayer ()
{
QStringList files =
QFileDialog::getOpenFileNames ("Shapefiles (*.shp);;All files (*.*)", 0, this, "open files dialog",
"Select one or more layers to add");
QStringList::Iterator it = files.begin ();
while (it != files.end ())
{
QFileInfo fi (*it);
QString base = fi.baseName ();
// create the layer
QgsShapeFileLayer *lyr = new QgsShapeFileLayer (*it, base);
// give it a random color
if(lyr->isValid()){
// add it to the mapcanvas collection
mapCanvas->addLayer (lyr);
}else{
QString msg = *it;
msg += " is not a valid or recognized data source";
QMessageBox::critical(this,"Invalid Data Source",msg);
}
++it;
}
qApp->processEvents ();
// update legend
/*! \todo Need legend scrollview and legenditem classes */
// draw the map
mapLegend->update();
mapCanvas->render2 ();
statusBar ()->message (mapCanvas->extent ().stringRep ());
}
void QgisApp::addDatabaseLayer ()
{
// only supports postgis layers at present
// show the postgis dialog
QgsDbSourceSelect *dbs = new QgsDbSourceSelect ();
if (dbs->exec ())
{
// add files to the map canvas
QStringList tables = dbs->selectedTables ();
QString connInfo = dbs->connInfo ();
// for each selected table, connect to the datbase, parse the WKT geometry,
// and build a cavnasitem for it
// readWKB(connInfo,tables);
QStringList::Iterator it = tables.begin ();
while (it != tables.end ())
{
// create the layer
QgsDatabaseLayer *lyr = new QgsDatabaseLayer (connInfo, *it);
// give it a random color
// add it to the mapcanvas collection
mapCanvas->addLayer (lyr);
++it;
}
qApp->processEvents ();
// update legend
/*! \todo Need legend scrollview and legenditem classes */
mapLegend->update();
// draw the map
mapCanvas->render2 ();
statusBar ()->message (mapCanvas->extent ().stringRep ());
}
}
void QgisApp::fileExit ()
{
QApplication::exit ();
}
void QgisApp::zoomIn ()
{
/* QWMatrix m = mapCanvas->worldMatrix();
m.scale( 2.0, 2.0 );
mapCanvas->setWorldMatrix( m );
*/
mapTool = QGis::ZoomIn;
mapCanvas->setMapTool (mapTool);
// scale the extent
/* QgsRect ext = mapCanvas->extent();
ext.scale(0.5);
mapCanvas->setExtent(ext);
statusBar()->message(ext.stringRep());
mapCanvas->clear();
mapCanvas->render2(); */
}
void QgisApp::zoomOut ()
{
mapTool = QGis::ZoomOut;
mapCanvas->setMapTool (mapTool);
/* QWMatrix m = mapCanvas->worldMatrix();
m.scale( 0.5, 0.5 );
mapCanvas->setWorldMatrix( m );
*/
}
void QgisApp::pan ()
{
mapTool = QGis::Pan;
mapCanvas->setMapTool (mapTool);
}
void QgisApp::zoomFull ()
{
mapCanvas->zoomFullExtent ();
}
//void QgisApp::readWKB (const char *connInfo, QStringList tables)
//{
// PgCursor pgc (connInfo, "testcursor");
// // get "endianness"
// char *chkEndian = new char[4];
// memset (chkEndian, '\0', 4);
// chkEndian[0] = 0xE8;
// int *ce = (int *) chkEndian;
// bool isNDR = (232 == *ce);
// /* if(*ce != 232)
// cout << "Big endian" << endl;
// else
// cout << "Little endian" << endl;
// */
// QStringList::Iterator it = tables.begin ();
// while (it != tables.end ())
// {
// // get the extent of the layer
// QString esql = "select extent(the_geom) from " + *it;
// PgDatabase *pd = new PgDatabase (connInfo);
// int result = pd->ExecTuplesOk ((const char *) esql);
// QString extent = pd->GetValue (0, 0);
// // parse out the x and y values
// extent = extent.right (extent.length () - extent.find ("BOX3D(") - 6);
// QStringList coordPairs = QStringList::split (",", extent);
// QStringList x1y1 = QStringList::split (" ", coordPairs[0]);
// QStringList x2y2 = QStringList::split (" ", coordPairs[1]);
// double x1 = x1y1[0].toDouble ();
// double y1 = x1y1[1].toDouble ();
// double x2 = x2y2[0].toDouble ();
// double y2 = x2y2[1].toDouble ();
// double xMu = x2 - x1;
// double yMu = y2 - y1;
// int subordinantAxisLength;
// // determine the dominate direction for the mapcanvas
// if (mapCanvas->width () > mapCanvas->height ())
// {
// subordinantAxisLength = mapCanvas->height ();
// scaleFactor = yMu / subordinantAxisLength;
// mapWindow = new QRect (x1, y1, xMu, xMu);
// }
// else
// {
// subordinantAxisLength = mapCanvas->width ();
// scaleFactor = xMu / subordinantAxisLength;
// mapWindow = new QRect (x1, y1, yMu, yMu);
// }
// const char *xtent = (const char *) extent;
// string sql = "select asbinary(the_geom,";
// if (isNDR)
// sql += "'NDR'";
// else
// sql += "'XDR'";
// sql += ") as features from ";
// sql += *it++;
// cout << sql.c_str () << endl;
// pgc.Declare (sql.c_str (), true);
// int res = pgc.Fetch ();
// cout << "Number of binary records: " << pgc.Tuples () << endl;
// bool setExtent = true;
// // process each record
// QPainter paint;
// paint.begin (mapCanvas);
// paint.setWindow (*mapWindow);
// QRect v = paint.viewport ();
// int d = QMIN (v.width (), v.height ());
// paint.setViewport (v.left () + (v.width () - d) / 2,
// v.top () + (v.height () - d) / 2, d, d);
// paint.setPen (Qt::red);
// for (int idx = 0; idx < pgc.Tuples (); idx++)
// {
// cout << "Size of this record: " << pgc.GetLength (idx, 0) << endl;
// // allocate memory for the item
// char *feature = new char[pgc.GetLength (idx, 0) + 1];
// memset (feature, '\0', pgc.GetLength (idx, 0) + 1);
// memcpy (feature, pgc.GetValue (idx, 0), pgc.GetLength (idx, 0));
// cout << "Endian is: " << (int) feature[0] << endl;
// cout << "Geometry type is: " << (int) feature[1] << endl;
// // print the x,y coordinates
// double *x = (double *) (feature + 5);
// double *y = (double *) (feature + 5 + sizeof (double));
// cout << "x,y: " << setprecision (16) << *x << ", " << *y << endl;
// QPoint pt = paint.xForm (QPoint ((int) *x, (int) *y));
// cout << "Plotting " << *x << ", " << *y << " at " << pt.
// x () << ", " << pt.y () << endl;
// paint.drawRect ((int) *x, mapWindow->bottom () - (int) *y, 15000,
// 15000);
// // free it
// delete[]feature;
// }
// paint.end ();
// }
//}
void QgisApp::drawPoint (double x, double y)
{
QPainter paint;
// QWMatrix mat (scaleFactor, 0, 0, scaleFactor, 0, 0);
paint.begin (mapCanvas);
// paint.setWorldMatrix(mat);
paint.setWindow (*mapWindow);
paint.setPen (Qt::blue);
paint.drawPoint ((int) x, (int) y);
paint.end ();
}
void QgisApp::drawLayers ()
{
std::cout << "In QgisApp::drawLayers()" << std::endl;
mapCanvas->render2 ();
}
void QgisApp::showMouseCoordinate (QgsPoint & p)
{
statusBar ()->message (p.stringRep ());
//qWarning("X,Y is: " + p.stringRep());
}
void QgisApp::testButton ()
{
QgsShapeFileLayer *sfl = new QgsShapeFileLayer ("foo");
mapCanvas->addLayer (sfl);
// delete sfl;
}
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