Add recursive drawing method to QGraphicsScene. For now it's opt-in, but

the important thing is by effectively implementing Simple Canvas' approach
to drawing, we're in theory (and in practise measured on the desktop)
as fast as Simple Canvas when rendering.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicsscene_p.h b/src/gui/graphicsview/qgraphicsscene_p.h
index 9ace725..369b0ef 100644
--- a/src/gui/graphicsview/qgraphicsscene_p.h
+++ b/src/gui/graphicsview/qgraphicsscene_p.h
@@ -253,6 +253,9 @@ public:
                         const QStyleOptionGraphicsItem *option, QWidget *widget,
                         bool painterStateProtection);
     
+    void drawSubtreeRecursive(QGraphicsItem *item, QPainter *painter, const QTransform &viewTransform,
+                              const QRegion &exposedRegion, QWidget *widget);
+
     QStyle *style;
     QFont font;
     void setFont_helper(const QFont &font);