Attempt to fix graphical glitches

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1983 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/core/track.cpp

@@ -1173,10 +1173,13 @@ void trackContentWidget::updateBackground( void )
     int width = ppt * tactsPerBar;
 
     m_background = QPixmap( width * 2, height() );
-    QPainter pmp( &m_background );
+    QPainter pmp;
+    pmp.begin( &m_background );
 
     engine::getLmmsStyle()->drawTrackContentBackground( &pmp, 
             QSize( width, height() ), ppt );
+
+    pmp.end();
 }
 
 

src/gui/fx_mixer_view.cpp

@@ -61,8 +61,11 @@ public:
 
 	virtual void paintEvent( QPaintEvent * )
 	{
-		engine::getLmmsStyle()->drawFxLine( &QPainter(this),
+        QPainter painter;
+        painter.begin(this);
+		engine::getLmmsStyle()->drawFxLine( &painter,
 				this, m_name, m_mv->currentFxLine() == this );
+        painter.end();
 	}
 
 	virtual void mousePressEvent( QMouseEvent * )