Notify sub-classes of QGraphicsEffect whenever the source changes.

3 files changed, 12 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicseffect.cpp b/src/gui/graphicsview/qgraphicseffect.cpp
index 6bf28ac..f3f7f22 100644
--- a/src/gui/graphicsview/qgraphicseffect.cpp
+++ b/src/gui/graphicsview/qgraphicseffect.cpp
@@ -187,6 +187,12 @@ bool QGraphicsEffect::isEnabled() const
     return d->isEnabled;
 }
 
+QGraphicsEffectSource *QGraphicsEffect::source() const
+{
+    Q_D(const QGraphicsEffect);
+    return d->source;
+}
+
 void QGraphicsEffect::updateBoundingRect()
 {
     Q_D(QGraphicsEffect);
@@ -194,6 +200,9 @@ void QGraphicsEffect::updateBoundingRect()
         d->source->update();
 }
 
+void QGraphicsEffect::sourceChanged(QGraphicsEffectSource *)
+{}
+
 QGraphicsGrayscaleEffect::QGraphicsGrayscaleEffect()
     : QGraphicsEffect(*new QGraphicsGrayscaleEffectPrivate)
 {}
diff --git a/src/gui/graphicsview/qgraphicseffect.h b/src/gui/graphicsview/qgraphicseffect.h
index 9deada1..1db8b6e 100644
--- a/src/gui/graphicsview/qgraphicseffect.h
+++ b/src/gui/graphicsview/qgraphicseffect.h
@@ -105,6 +105,7 @@ public:
     bool hasSourcePixmap() const;
     virtual QRectF boundingRectFor(const QRectF &rect) const;
     bool isEnabled() const;
+    QGraphicsEffectSource *source() const;
 
 public Q_SLOTS:
     void setEnabled(bool enable);
@@ -112,6 +113,7 @@ public Q_SLOTS:
 protected:
     QGraphicsEffect(QGraphicsEffectPrivate &d);
     virtual void draw(QPainter *painter, QGraphicsEffectSource *source) = 0;
+    virtual void sourceChanged(QGraphicsEffectSource *newSource);
     void updateBoundingRect();
 
 private:
diff --git a/src/gui/graphicsview/qgraphicseffect_p.h b/src/gui/graphicsview/qgraphicseffect_p.h
index 63da37b..7ebfe07 100644
--- a/src/gui/graphicsview/qgraphicseffect_p.h
+++ b/src/gui/graphicsview/qgraphicseffect_p.h
@@ -92,6 +92,7 @@ public:
             delete source;
         }
         source = newSource;
+        q_func()->sourceChanged(newSource);
     }
     QRectF boundingRect;
     QPixmap sourcePixmap;