For 32-bit Mac builds, use traditional non-native Qt font dialog. The new Qt 4.5 native implementation was added to support 64-bit builds and appears not to have been extensively tested for backward compatibility.

telwertowski · telwertowski · commit 2cb060569d39 · 2009-08-06T01:47:36.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk@11280 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/app/qgslabeldialog.cpp b/src/app/qgslabeldialog.cpp
@@ -275,7 +275,12 @@ void QgsLabelDialog::changeFont( void )
 
   qreal fontSize = mFont.pointSizeF();
   bool resultFlag;
+#if defined(Q_WS_MAC) && QT_VERSION >= 0x040500 && !defined(__LP64__)
+  // Native Mac dialog works only for 64 bit Cocoa (observed in Qt 4.5.2, probably a Qt bug)
+  mFont = QFontDialog::getFont( &resultFlag, mFont, this, QString(), QFontDialog::DontUseNativeDialog );
+#else
   mFont = QFontDialog::getFont( &resultFlag, mFont, this );
+#endif
   if ( resultFlag )
   {
     if ( mFont.pointSizeF() != fontSize )
