Show a preview message if composer map preview mode is rectangle (ticket 1287)

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@9280 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/core/composer/qgscomposermap.cpp

@@ -181,7 +181,14 @@ void QgsComposerMap::paint( QPainter* painter, const QStyleOptionGraphicsItem* i
 
   double currentScaleFactorX = horizontalViewScaleFactor();
 
-  if ( mComposition->plotStyle() == QgsComposition::Preview && mPreviewMode != Rectangle )
+  if ( mComposition->plotStyle() == QgsComposition::Preview && mPreviewMode == Rectangle )
+    {
+      QFont messageFont("", 12);
+      painter->setFont(messageFont);
+      painter->setPen(QColor(0, 0, 0));
+      painter->drawText(thisPaintRect, tr("Map will be printed here"));
+    }
+  else if ( mComposition->plotStyle() == QgsComposition::Preview)
   {
     //draw cached pixmap. This function does not call cache() any more because
     //Qt 4.4.0 and 4.4.1 have problems with recursive paintings