[QGIS Commit] r10593 - branches/Version-1_0/src/gui
svn_qgis at osgeo.org
svn_qgis at osgeo.org
Sat Apr 18 16:52:36 EDT 2009
Author: mhugent
Date: 2009-04-18 16:52:36 -0400 (Sat, 18 Apr 2009)
New Revision: 10593
Modified:
branches/Version-1_0/src/gui/qgsmapcanvas.cpp
Log:
Backport of smizunos patch that fixes #1540
Modified: branches/Version-1_0/src/gui/qgsmapcanvas.cpp
===================================================================
--- branches/Version-1_0/src/gui/qgsmapcanvas.cpp 2009-04-18 20:48:04 UTC (rev 10592)
+++ branches/Version-1_0/src/gui/qgsmapcanvas.cpp 2009-04-18 20:52:36 UTC (rev 10593)
@@ -418,23 +418,25 @@
//create a world file to go with the image...
QgsRectangle myRect = mMapRenderer->extent();
QString myHeader;
+ // note: use 17 places of precision for all numbers output
//Pixel XDim
- myHeader += QString::number( mapUnitsPerPixel() ) + "\r\n";
+ myHeader += QString::number( mapUnitsPerPixel(), 'g', 17 ) + "\r\n";
//Rotation on y axis - hard coded
myHeader += "0 \r\n";
//Rotation on x axis - hard coded
myHeader += "0 \r\n";
//Pixel YDim - almost always negative - see
//http://en.wikipedia.org/wiki/World_file#cite_note-2
- myHeader += "-" + QString::number( mapUnitsPerPixel() ) + "\r\n";
- //Origin X (top left corner)
- myHeader += QString::number( myRect.xMinimum() ) + "\r\n";
- //Origin Y (top left corner)
- myHeader += QString::number( myRect.yMaximum() ) + "\r\n";
+ myHeader += "-" + QString::number( mapUnitsPerPixel(), 'g', 17 ) + "\r\n";
+ //Origin X (center of top left cell)
+ myHeader += QString::number( myRect.xMinimum() + ( mapUnitsPerPixel() / 2 ), 'g', 17 ) + "\r\n";
+ //Origin Y (center of top left cell)
+ myHeader += QString::number( myRect.yMaximum() - ( mapUnitsPerPixel() / 2 ), 'g', 17 ) + "\r\n";
QFileInfo myInfo = QFileInfo( theFileName );
- QString myWorldFileName = myInfo.absolutePath() + QDir::separator() + myInfo.baseName() + "." + theFormat + "w";
+ // allow dotted names
+ QString myWorldFileName = myInfo.absolutePath() + QDir::separator() + myInfo.completeBaseName() + "." + theFormat + "w";
QFile myWorldFile( myWorldFileName );
- if ( !myWorldFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
+ if ( !myWorldFile.open( QIODevice::WriteOnly ) ) //don't use QIODevice::Text
{
return;
}
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