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Context menu support and implemented handlers for multiband gray and pseudocolour rendering.

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git-svn-id: http://svn.osgeo.org/qgis/trunk@578 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
timlinux 2004-01-25 01:07:04 +00:00
parent 889420a8b8
commit 6b2b8fc273
1 changed files with 26 additions and 11 deletions
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37
src/qgsrasterlayer.cpp
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@ -58,15 +58,18 @@ The [type] part of the variable should be the type class of the variable written
#include <qfont.h>
#include <qfontmetrics.h>
#include <qwmatrix.h>
#include <qpopupmenu.h>
#include <stdio.h>
#include "qgsrasterlayer.h"
#include "qgsrect.h"
#include "qgisapp.h"
#include "qgsrasterlayerproperties.h"
#include "gdal_priv.h"
QgsRasterLayer::QgsRasterLayer(QString path, QString baseName)
:QgsMapLayer(RASTER, baseName, path)
{
popMenu=0;
//std::cout << "QgsRasterLayer::QgsRasterLayer()" << std::endl;
GDALAllRegister();
@ -319,7 +322,6 @@ void QgsRasterLayer::draw(QPainter * theQPainter, QgsRect * theViewExtent, QgsCo
QString myColorQString = GDALGetColorInterpretationName(myGdalBand->GetColorInterpretation());
//
//
// The goal here is to make as many decisions as possible early on (outside of the rendering loop)
@ -350,9 +352,11 @@ void QgsRasterLayer::draw(QPainter * theQPainter, QgsRect * theViewExtent, QgsCo
break;
// a layer containing 2 or more bands, but using only one band to produce a grayscale image
case MULTI_BAND_SINGLE_BAND_GRAY:
drawMultiBandSingleBandGray(theQPainter, myRasterViewPort, myGdalBand);
break;
//a layer containing 2 or more bands, but using only one band to produce a pseudocolor image
case MULTI_BAND_SINGLE_BAND_PSEUDO_COLOR:
drawMultiBandSingleBandPseudoColor(theQPainter, myRasterViewPort, myGdalBand);
break;
//a layer containing 2 or more bands, mapped to the three RGBcolors.
//In the case of a multiband with only two bands, one band will have to be mapped to more than one color
@ -382,12 +386,8 @@ void QgsRasterLayer::drawSingleBandGray(QPainter * theQPainter,
std::cout << "QgsRasterLayer::drawSingleBandGray called" << std::endl;
//create the outout image that the layer will be drawn on before placing it in the qcanvas
QPixmap * myQPixmap=new QPixmap(theRasterViewPort->drawableAreaXDimInt,theRasterViewPort->drawableAreaYDimInt);
//myQPixmap.setAlphaBuffer(true); //only supported for qimage
//create a temporary qpainter that can be used for xoring red, green and blue data onto
//the image.
QPainter myQPainter;
myQPainter.begin(myQPixmap);
// QPixmap * myQPixmap=new QPixmap(theRasterViewPort->drawableAreaXDimInt,theRasterViewPort->drawableAreaYDimInt);
// read entire clipped area of raster band
// treat myGdalScanData as a pseudo-multidimensional array
// RasterIO() takes care of scaling down image
@ -956,14 +956,16 @@ void QgsRasterLayer::drawPalettedMultiBandColor(QPainter * theQPainter,
theQPainter->drawImage(theRasterViewPort->topLeftPoint.xToInt(), theRasterViewPort->topLeftPoint.yToInt(),myQImage);
}
void drawMultiBandSingleBandGray(QPainter * theQPainter, RasterViewPort * theRasterViewPort)
void QgsRasterLayer::drawMultiBandSingleBandGray(QPainter * theQPainter, RasterViewPort * theRasterViewPort, GDALRasterBand * theGdalBand )
{
//delegate to drawSingleBandGray!
drawSingleBandGray(theQPainter, theRasterViewPort, theGdalBand);
}
void drawMultiBandSingleBandPseudoColor(QPainter * theQPainter, RasterViewPort * theRasterViewPort)
void QgsRasterLayer::drawMultiBandSingleBandPseudoColor(QPainter * theQPainter, RasterViewPort * theRasterViewPort, GDALRasterBand * theGdalBand)
{
//delegate to drawSinglePseudocolor!
drawSingleBandPseudoColor(theQPainter, theRasterViewPort, theGdalBand);
}
void QgsRasterLayer::drawMultiBandColor(QPainter * theQPainter,
RasterViewPort * theRasterViewPort)
@ -1598,3 +1600,16 @@ QPixmap * QgsRasterLayer::legendPixmap()
return new QPixmap(myQPixmap);
}
/** Accessor for the superclass popmenu var*/
QPopupMenu *QgsRasterLayer::contextMenu(){
return popMenu;
}
void QgsRasterLayer::initContextMenu(QgisApp *theApp){
popMenu = new QPopupMenu();
popMenu->insertItem(tr("&Zoom to extent of selected layer"), theApp, SLOT(zoomToLayerExtent()));
popMenu->insertItem(tr("&Properties"), theApp, SLOT(layerProperties()));
popMenu->insertSeparator();
popMenu->insertItem(tr("&Remove"), theApp, SLOT(removeLayer()));
}