1 files changed, 7 insertions, 1 deletions
diff --git a/noncore/graphics/drawpad/pointdrawmode.cpp b/noncore/graphics/drawpad/pointdrawmode.cpp
index 30753d6..e251f1b 100644
--- a/noncore/graphics/drawpad/pointdrawmode.cpp
+++ b/noncore/graphics/drawpad/pointdrawmode.cpp
@@ -53,15 +53,21 @@ void PointDrawMode::mouseMoveEvent(QMouseEvent* e)
         m_polyline[1] = m_polyline[0];
         m_polyline[0] = e->pos();
         painter.drawPolyline(m_polyline);
         painter.end();
 
         QRect r = m_polyline.boundingRect();
         r = r.normalize();
         r.setLeft(r.left() - m_pDrawPad->pen().width());
         r.setTop(r.top() - m_pDrawPad->pen().width());
         r.setRight(r.right() + m_pDrawPad->pen().width());
         r.setBottom(r.bottom() + m_pDrawPad->pen().width());
 
-        bitBlt(m_pDrawPadCanvas, r.x(), r.y(), m_pDrawPadCanvas->currentPage(), r.x(), r.y(), r.width(), r.height());
+        QRect viewportRect(m_pDrawPadCanvas->contentsToViewport(r.topLeft()),
+                           m_pDrawPadCanvas->contentsToViewport(r.bottomRight()));
+
+        bitBlt(m_pDrawPadCanvas->viewport(), viewportRect.x(), viewportRect.y(),
+               m_pDrawPadCanvas->currentPage(), r.x(), r.y(), r.width(), r.height());
+
+        m_pDrawPadCanvas->viewport()->update(viewportRect);
     }
 }