committed Martin Teichmann's patch 1828813 to fix qt4 error messages

ddale · ddale · commit 51d1a84a702e · 2007-11-09T13:20:10.000Z
related to QPainter

svn path=/trunk/matplotlib/; revision=4180
diff --git a/CHANGELOG b/CHANGELOG
@@ -1,3 +1,9 @@
+2007-11-09 Applied Martin Teichmann's patch 1828813: a QPainter is used in
+           paintEvent, which has to be destroyed using  the method end(). If 
+           matplotlib raises an exception before the call to end - and it 
+           does if you feed it with bad data - this method end() is never 
+           called and Qt4 will start spitting error messages - DSD
+
 2007-11-09 Moved pyparsing back into matplotlib namespace. Don't use 
            system pyparsing, API is too variable from one release
            to the next - DSD
diff --git a/lib/matplotlib/backends/backend_qt4agg.py b/lib/matplotlib/backends/backend_qt4agg.py
@@ -116,6 +116,7 @@ def paintEvent( self, e ):
             qImage = QtGui.QImage(stringBuffer, w, h, QtGui.QImage.Format_ARGB32)
             p = QtGui.QPainter(self)
             pixmap = QtGui.QPixmap.fromImage(qImage)
+            p = QtGui.QPainter( self )
             p.drawPixmap(QtCore.QPoint(l, self.renderer.height-t), pixmap)
             p.end()
         self.replot = False
