Merge branch '4.5' of git@scm.dev.nokia.troll.no:qt/qt into 4.5

4 files changed, 102 insertions, 16 deletions

diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index 3e8d38f..11ec24b 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -1921,7 +1921,7 @@ void QGraphicsItem::setOpacity(qreal opacity)
     itemChange(ItemOpacityHasChanged, newOpacity);
 
     // Update.
-    d_ptr->fullUpdateHelper();
+    d_ptr->fullUpdateHelper(/*childrenOnly=*/false, /*maybeDirtyClipPath=*/false, /*ignoreOpacity=*/true);
 }
 
 /*!
@@ -3621,9 +3621,8 @@ void QGraphicsItem::setBoundingRegionGranularity(qreal granularity)
     \internal
     Returns true if we can discard an update request; otherwise false.
 */
-bool QGraphicsItemPrivate::discardUpdateRequest(bool ignoreClipping,
-                                                bool ignoreVisibleBit,
-                                                bool ignoreDirtyBit) const
+bool QGraphicsItemPrivate::discardUpdateRequest(bool ignoreClipping, bool ignoreVisibleBit,
+                                                bool ignoreDirtyBit, bool ignoreOpacity) const
 {
     // No scene, or if the scene is updating everything, means we have nothing
     // to do. The only exception is if the scene tracks the growing scene rect.
@@ -3632,7 +3631,7 @@ bool QGraphicsItemPrivate::discardUpdateRequest(bool ignoreClipping,
            || !scene
            || (scene->d_func()->updateAll && scene->d_func()->hasSceneRect)
            || (!ignoreClipping && (childrenClippedToShape() && isClippedAway()))
-           || (childrenCombineOpacity() && isFullyTransparent());
+           || (!ignoreOpacity && childrenCombineOpacity() && isFullyTransparent());
 }
 
 /*!
@@ -3662,11 +3661,10 @@ void QGraphicsItemPrivate::updateHelper(const QRectF &rect, bool force, bool may
 
     Propagates updates to \a item and all its children.
 */
-void QGraphicsItemPrivate::fullUpdateHelper(bool childrenOnly, bool maybeDirtyClipPath)
+void QGraphicsItemPrivate::fullUpdateHelper(bool childrenOnly, bool maybeDirtyClipPath, bool ignoreOpacity)
 {
-    if (discardUpdateRequest(/*ignoreClipping=*/maybeDirtyClipPath,
-                             /*ignoreVisibleBit=*/false,
-                             /*ignoreDirtyBit=*/true)) {
+    if (discardUpdateRequest(/*ignoreClipping=*/maybeDirtyClipPath, /*ignoreVisibleBit=*/false,
+                             /*ignoreDirtyBit=*/true, ignoreOpacity)) {
         return;
     }
 
diff --git a/src/gui/graphicsview/qgraphicsitem_p.h b/src/gui/graphicsview/qgraphicsitem_p.h
index a5871a7..9ce1bbf 100644
--- a/src/gui/graphicsview/qgraphicsitem_p.h
+++ b/src/gui/graphicsview/qgraphicsitem_p.h
@@ -165,11 +165,10 @@ public:
     void setPosHelper(const QPointF &pos);
     void setVisibleHelper(bool newVisible, bool explicitly, bool update = true);
     void setEnabledHelper(bool newEnabled, bool explicitly, bool update = true);
-    bool discardUpdateRequest(bool ignoreClipping = false,
-                              bool ignoreVisibleBit = false,
-                              bool ignoreDirtyBit = false) const;
+    bool discardUpdateRequest(bool ignoreClipping = false, bool ignoreVisibleBit = false,
+                              bool ignoreDirtyBit = false, bool ignoreOpacity = false) const;
     void updateHelper(const QRectF &rect = QRectF(), bool force = false, bool maybeDirtyClipPath = false);
-    void fullUpdateHelper(bool childrenOnly = false, bool maybeDirtyClipPath = false);
+    void fullUpdateHelper(bool childrenOnly = false, bool maybeDirtyClipPath = false, bool ignoreOpacity = false);
     void updateEffectiveOpacity();
     void resolveEffectiveOpacity(qreal effectiveParentOpacity);
     void resolveDepth(int parentDepth);
diff --git a/src/gui/graphicsview/qgraphicsview.cpp b/src/gui/graphicsview/qgraphicsview.cpp
index b5a1bdf..05e4907 100644
--- a/src/gui/graphicsview/qgraphicsview.cpp
+++ b/src/gui/graphicsview/qgraphicsview.cpp
@@ -1071,8 +1071,12 @@ QList<QGraphicsItem *> QGraphicsViewPrivate::findItems(const QRegion &exposedReg
         QList<QGraphicsItem *> itemList(scene->items());
         int i = 0;
         while (i < itemList.size()) {
+            const QGraphicsItem *item = itemList.at(i);
             // But we only want to include items that are visible
-            if (!itemList.at(i)->isVisible())
+            // The following check is basically the same as item->d_ptr->isInvisible(), except
+            // that we don't check whether the item clips children to shape or propagates its
+            // opacity (we loop through all items, so those checks are wrong in this context).
+            if (!item->isVisible() || item->d_ptr->isClippedAway() || item->d_ptr->isFullyTransparent())
                 itemList.removeAt(i);
             else
                 ++i;
diff --git a/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp b/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
index 77b7948..6d150cb 100644
--- a/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
+++ b/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
@@ -78,8 +78,7 @@ Q_DECLARE_METATYPE(QRectF)
 class EventTester : public QGraphicsItem
 {
 public:
-    EventTester()
-        : repaints(0)
+    EventTester(QGraphicsItem *parent = 0) : QGraphicsItem(parent), repaints(0)
     { br = QRectF(-10, -10, 20, 20); }
 
     void setGeometry(const QRectF &rect)
@@ -207,6 +206,7 @@ private slots:
     void itemTransform_unrelated();
     void opacity_data();
     void opacity();
+    void opacity2();
     void itemStacksBehindParent();
     void nestedClipping();
     void nestedClippingTransforms();
@@ -5570,6 +5570,91 @@ void tst_QGraphicsItem::opacity()
     QCOMPARE(c3->effectiveOpacity(), c3_effectiveOpacity);
 }
 
+void tst_QGraphicsItem::opacity2()
+{
+    EventTester *parent = new EventTester;
+    EventTester *child = new EventTester(parent);
+    EventTester *grandChild = new EventTester(child);
+
+    QGraphicsScene scene;
+    scene.addItem(parent);
+
+    class MyGraphicsView : public QGraphicsView
+    { public:
+        int repaints;
+        MyGraphicsView(QGraphicsScene *scene) : QGraphicsView(scene), repaints(0) {}
+        void paintEvent(QPaintEvent *e) { ++repaints; QGraphicsView::paintEvent(e); }
+    };
+
+    MyGraphicsView view(&scene);
+    view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
+    QTest::qWait(250);
+
+#define RESET_REPAINT_COUNTERS \
+    parent->repaints = 0; \
+    child->repaints = 0; \
+    grandChild->repaints = 0; \
+    view.repaints = 0;
+
+    RESET_REPAINT_COUNTERS
+
+    child->setOpacity(0.0);
+    QTest::qWait(100);
+    QCOMPARE(view.repaints, 1);
+    QCOMPARE(parent->repaints, 1);
+    QCOMPARE(child->repaints, 0);
+    QCOMPARE(grandChild->repaints, 0);
+
+    RESET_REPAINT_COUNTERS
+
+    child->setOpacity(1.0);
+    QTest::qWait(100);
+    QCOMPARE(view.repaints, 1);
+    QCOMPARE(parent->repaints, 1);
+    QCOMPARE(child->repaints, 1);
+    QCOMPARE(grandChild->repaints, 1);
+
+    RESET_REPAINT_COUNTERS
+
+    parent->setOpacity(0.0);
+    QTest::qWait(100);
+    QCOMPARE(view.repaints, 1);
+    QCOMPARE(parent->repaints, 0);
+    QCOMPARE(child->repaints, 0);
+    QCOMPARE(grandChild->repaints, 0);
+
+    RESET_REPAINT_COUNTERS
+
+    parent->setOpacity(1.0);
+    QTest::qWait(100);
+    QCOMPARE(view.repaints, 1);
+    QCOMPARE(parent->repaints, 1);
+    QCOMPARE(child->repaints, 1);
+    QCOMPARE(grandChild->repaints, 1);
+
+    grandChild->setFlag(QGraphicsItem::ItemIgnoresParentOpacity);
+    RESET_REPAINT_COUNTERS
+
+    child->setOpacity(0.0);
+    QTest::qWait(100);
+    QCOMPARE(view.repaints, 1);
+    QCOMPARE(parent->repaints, 1);
+    QCOMPARE(child->repaints, 0);
+    QCOMPARE(grandChild->repaints, 1);
+
+    RESET_REPAINT_COUNTERS
+
+    child->setOpacity(0.0); // Already 0.0; no change.
+    QTest::qWait(100);
+    QCOMPARE(view.repaints, 0);
+    QCOMPARE(parent->repaints, 0);
+    QCOMPARE(child->repaints, 0);
+    QCOMPARE(grandChild->repaints, 0);
+}
+
 void tst_QGraphicsItem::itemStacksBehindParent()
 {
     QGraphicsRectItem *parent1 = new QGraphicsRectItem(QRectF(0, 0, 100, 50));