diff options
-rw-r--r-- | src/quick/items/context2d/qquickcanvasitem.cpp | 20 | ||||
-rw-r--r-- | src/quick/items/context2d/qquickcanvasitem_p.h | 2 |
2 files changed, 21 insertions, 1 deletions
diff --git a/src/quick/items/context2d/qquickcanvasitem.cpp b/src/quick/items/context2d/qquickcanvasitem.cpp index b772ed97d2..1167f408f5 100644 --- a/src/quick/items/context2d/qquickcanvasitem.cpp +++ b/src/quick/items/context2d/qquickcanvasitem.cpp @@ -640,6 +640,17 @@ void QQuickCanvasItem::releaseResources() } } +bool QQuickCanvasItem::event(QEvent *event) +{ + switch (event->type()) { + case QEvent::PolishRequest: + polish(); + return true; + default: + return QQuickItem::event(event); + } +} + void QQuickCanvasItem::invalidateSceneGraph() { Q_D(QQuickCanvasItem); @@ -651,6 +662,12 @@ void QQuickCanvasItem::invalidateSceneGraph() d->textureProvider = 0; } +void QQuickCanvasItem::schedulePolish() +{ + auto polishRequestEvent = new QEvent(QEvent::PolishRequest); + QCoreApplication::postEvent(this, polishRequestEvent); +} + void QQuickCanvasItem::componentComplete() { QQuickItem::componentComplete(); @@ -892,8 +909,9 @@ void QQuickCanvasItem::requestAnimationFrame(QQmlV4Function *args) d->animationCallbacks.insert(++id, QV4::PersistentValue(scope.engine, f->asReturnedValue())); + // QTBUG-55778: Calling polish directly here can lead to a polish loop if (isVisible()) - polish(); + schedulePolish(); args->setReturnValue(QV4::Encode(id)); } diff --git a/src/quick/items/context2d/qquickcanvasitem_p.h b/src/quick/items/context2d/qquickcanvasitem_p.h index 8af84d0e7c..217ae9bb69 100644 --- a/src/quick/items/context2d/qquickcanvasitem_p.h +++ b/src/quick/items/context2d/qquickcanvasitem_p.h @@ -182,6 +182,7 @@ private Q_SLOTS: void sceneGraphInitialized(); void checkAnimationCallbacks(); void invalidateSceneGraph(); + void schedulePolish(); protected: void componentComplete() Q_DECL_OVERRIDE; @@ -190,6 +191,7 @@ protected: QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *) Q_DECL_OVERRIDE; void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) Q_DECL_OVERRIDE; void releaseResources() Q_DECL_OVERRIDE; + bool event(QEvent *event) Q_DECL_OVERRIDE; private: Q_DECLARE_PRIVATE(QQuickCanvasItem) Q_INVOKABLE void delayedCreate(); |