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Fixed the rather broken algorithm for creating gradients on the advanced symbology tab.

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Added text overlay on each color preview showing the range selected.
Note the gui now works ok, but I have to implement the application logic for this behaviour still.


git-svn-id: http://svn.osgeo.org/qgis/trunk@415 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
timlinux 2004-01-04 22:56:07 +00:00
parent 106ff105dc
commit 7a877212ca
1 changed files with 43 additions and 10 deletions
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53
src/qgsrasterlayerproperties.cpp
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@ -29,6 +29,8 @@
#include <qlineedit.h>
#include <qtable.h>
#include <qtextedit.h>
#include <qpainter.h>
#include <qfont.h>
QgsRasterLayerProperties::QgsRasterLayerProperties(QgsMapLayer * lyr) : QgsRasterLayerPropertiesBase()
{
//downcast the maplayer to rasterlayer
@ -254,6 +256,7 @@ void QgsRasterLayerProperties::accept()
close();
}
void QgsRasterLayerProperties::sliderMaxRed_valueChanged( int )
{
//the 255- is used because a vertical qslider has its max value at the bottom and
@ -386,36 +389,66 @@ void QgsRasterLayerProperties::makeScalePreview(QString theColor)
myMinDouble=sliderMinGray->value();
myMaxDouble=255-sliderMaxGray->value();
}
QImage myQImage = QImage(100,1,32); //32bpp
QImage myQImage = QImage(100,100,32); //32bpp
double myRangeDouble = myMaxDouble - myMinDouble;
double myDecrementDouble = myRangeDouble/100;
//std::cout << "Decrementing " << theColor << " by : " << myDecrementDouble << std::endl;
if (myDecrementDouble==0) return;
for (double myDouble=99; myDouble >= 0; myDouble=myDouble-myDecrementDouble)
for (int myRowInt=99; myRowInt >=0; myRowInt=myRowInt-1)
{
//reset the max value that the scale starts at
if (theColor=="red")
{
myRedDouble-= myDecrementDouble;
myRedDouble=myMaxDouble;
}
else if (theColor=="green")
{
myGreenDouble -= myDecrementDouble;
myGreenDouble=myMaxDouble;
}
else if (theColor=="blue")
{
myBlueDouble -= myDecrementDouble;
myBlueDouble=myMaxDouble;
}
else if (theColor=="gray")
{
myRedDouble -= myDecrementDouble;
myGreenDouble -= myDecrementDouble;
myBlueDouble -= myDecrementDouble;
myRedDouble = myMaxDouble;
myGreenDouble=myMaxDouble;
myBlueDouble=myMaxDouble;
}
for (double myColInt=99; myColInt >= 0; myColInt=myColInt-1)
{
if (theColor=="red")
{
myRedDouble-= myDecrementDouble;
}
else if (theColor=="green")
{
myGreenDouble -= myDecrementDouble;
}
else if (theColor=="blue")
{
myBlueDouble -= myDecrementDouble;
}
else if (theColor=="gray")
{
myRedDouble -= myDecrementDouble;
myGreenDouble -= myDecrementDouble;
myBlueDouble -= myDecrementDouble;
}
//std::cout << "R " << myRedDouble << " G " << myGreenDouble << " B " << myBlueDouble << std::endl;
myQImage.setPixel(myColInt,myRowInt,qRgb((unsigned int)myRedDouble, (unsigned int)myGreenDouble, (unsigned int)myBlueDouble));
}
//std::cout << "R " << myRedDouble << " G " << myGreenDouble << " B " << myBlueDouble << std::endl;
myQImage.setPixel(static_cast<unsigned int>(myDouble),0,qRgb((unsigned int)myRedDouble, (unsigned int)myGreenDouble, (unsigned int)myBlueDouble));
}
//now convert the qimage to a pixmap so we can set the pixmap label with it
QPixmap *myQPixmap = new QPixmap(100,100);
myQPixmap->convertFromImage(myQImage,36);
// Draw a text alabel onto the pixmap showing the min max value
QPainter myQPainter(myQPixmap);
QFont myQFont( "time", 18, QFont::Bold );
myQPainter.setFont( myQFont );
myQPainter.setPen( Qt::white );
myQPainter.drawText(10,50, QString::number(static_cast<unsigned int>(myMinDouble)) + " - " + QString::number(static_cast<unsigned int>(myMaxDouble)) );
//now draw the image into the relevant pixmap label
if (theColor=="red")
{
pixmapScaleRed->setScaledContents(true);