Only active QGraphicsScenes can have active input focus.

This change ensures that only active scenes can have active input
focus items. If you try to set input focus on items that are in an
inactive scene, these items will gain input focus only when the scene
is activated.

For scenes attached to a view, this change should only fix the bug that
you could have a blinking line edit in a scene when the view is inactive,
meaning you couldn't type into the line edit.

For scenes that have no view, you now must activate the scene in order
to give the items active input focus. This will affect those who use
QGraphicsScene with custom key and focus handling.

Reviewed-by: brad

5 files changed, 143 insertions, 20 deletions

diff --git a/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp b/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
index cefff80..65837ae 100644
--- a/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
+++ b/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
@@ -704,6 +704,9 @@ void tst_QGraphicsItem::flags()
     QCOMPARE(item->flags(), 0);
 
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(item);
 
     {
@@ -888,6 +891,9 @@ void tst_QGraphicsItem::visible()
     QVERIFY(item->isVisible());
 
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(item);
     QVERIFY(item->isVisible());
     QCOMPARE(scene.itemAt(0, 0), item);
@@ -1035,6 +1041,9 @@ void tst_QGraphicsItem::enabled()
     item->setEnabled(false);
     item->setFlag(QGraphicsItem::ItemIsFocusable);
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(item);
     item->setFocus();
     QVERIFY(!item->hasFocus());
@@ -1714,6 +1723,9 @@ void tst_QGraphicsItem::hasFocus()
     QVERIFY(!line->hasFocus());
 
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(line);
 
     line->setFocus();
@@ -1723,6 +1735,8 @@ void tst_QGraphicsItem::hasFocus()
     QVERIFY(line->hasFocus());
 
     QGraphicsScene scene2;
+    QApplication::sendEvent(&scene2, &activate);
+
     scene2.addItem(line);
     QVERIFY(!line->hasFocus());
 
@@ -3493,6 +3507,9 @@ void tst_QGraphicsItem::handlesChildEvents2()
 void tst_QGraphicsItem::handlesChildEvents3()
 {
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     ChildEventTester *group2 = new ChildEventTester(QRectF(), 0);
     ChildEventTester *group1 = new ChildEventTester(QRectF(), group2);
     ChildEventTester *leaf = new ChildEventTester(QRectF(), group1);
@@ -4466,8 +4483,13 @@ protected:
 void tst_QGraphicsItem::sceneEventFilter()
 {
     QGraphicsScene scene;
+
     QGraphicsView view(&scene);
     view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
+   QTest::qWait(250);
 
     QGraphicsTextItem *text1 = scene.addText(QLatin1String("Text1"));
     QGraphicsTextItem *text2 = scene.addText(QLatin1String("Text2"));
@@ -4584,8 +4606,10 @@ void tst_QGraphicsItem::paint()
     QGraphicsView view(&scene);
 
     view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
     QTest::qWait(250);
-
 #ifdef Q_OS_WIN32
     //we try to switch the desktop: if it fails, we skip the test
     if (::SwitchDesktop( ::GetThreadDesktop( ::GetCurrentThreadId() ) ) == 0) {
@@ -4593,8 +4617,7 @@ void tst_QGraphicsItem::paint()
     }
 #endif
 
-    QVERIFY(paintTester.widget == view.viewport());
-
+    QCOMPARE(paintTester.widget, view.viewport());
 
     view.hide();
 
@@ -5599,6 +5622,9 @@ void tst_QGraphicsItem::task240400_clickOnTextItem()
     QFETCH(int, textFlags);
 
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     QGraphicsTextItem *item = scene.addText("Hello");
     item->setFlags(QGraphicsItem::GraphicsItemFlags(flags));
     item->setTextInteractionFlags(Qt::TextInteractionFlags(textFlags));
@@ -6434,6 +6460,7 @@ void tst_QGraphicsItem::tabChangesFocus()
 
     QDial *dial1 = new QDial;
     QGraphicsView *view = new QGraphicsView(&scene);
+
     QDial *dial2 = new QDial;
     QVBoxLayout *layout = new QVBoxLayout;
     layout->addWidget(dial1);
@@ -6446,6 +6473,8 @@ void tst_QGraphicsItem::tabChangesFocus()
 #ifdef Q_WS_X11
     qt_x11_wait_for_window_manager(&widget);
 #endif
+    QTest::qWait(250);
+    QVERIFY(scene.isActive());
 
     dial1->setFocus();
     QTest::qWait(125);
@@ -7472,6 +7501,9 @@ void tst_QGraphicsItem::hitTestGraphicsEffectItem()
 void tst_QGraphicsItem::focusProxy()
 {
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     QGraphicsItem *item = scene.addRect(0, 0, 10, 10);
     item->setFlag(QGraphicsItem::ItemIsFocusable);
     QVERIFY(!item->focusProxy());
@@ -7570,6 +7602,9 @@ void tst_QGraphicsItem::subFocus()
     // Add both items to a scene and check that it's text that
     // got input focus.
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(text);
     scene.addItem(text2);
     QVERIFY(text->hasFocus());
@@ -7578,18 +7613,15 @@ void tst_QGraphicsItem::subFocus()
     text2->setData(0, "text2");
 
     // Remove text2 and set subfocus on it. Then readd. Reparent it onto the
-    // other item and see that although it becomes text's focus
-    // item, it does not immediately gain input focus.
+    // other item and see that it gains input focus.
     scene.removeItem(text2);
     text2->setFocus();
     scene.addItem(text2);
     QCOMPARE(text2->focusItem(), (QGraphicsItem *)text2);
     text2->setParentItem(text);
-    qDebug() << text->data(0).toString() << (void*)(QGraphicsItem *)text;
-    qDebug() << text2->data(0).toString() << (void*)(QGraphicsItem *)text2;
     QCOMPARE(text->focusItem(), (QGraphicsItem *)text2);
-    QVERIFY(text->hasFocus());
-    QVERIFY(!text2->hasFocus());
+    QVERIFY(!text->hasFocus());
+    QVERIFY(text2->hasFocus());
 
     // Remove both items from the scene, restore subfocus and
     // readd them. Now the subfocus should kick in and give
@@ -7605,6 +7637,23 @@ void tst_QGraphicsItem::subFocus()
     // Hiding and showing text should pass focus to text2.
     QCOMPARE(text->focusItem(), (QGraphicsItem *)text2);
     QVERIFY(text2->hasFocus());
+
+    // Subfocus should repropagate to root when reparenting.
+    QGraphicsRectItem *rect = new QGraphicsRectItem;
+    QGraphicsRectItem *rect2 = new QGraphicsRectItem(rect);
+    QGraphicsRectItem *rect3 = new QGraphicsRectItem(rect2);
+    rect3->setFlag(QGraphicsItem::ItemIsFocusable);
+
+    rect3->setFocus();
+    QVERIFY(!rect3->hasFocus());
+    QCOMPARE(rect->focusItem(), (QGraphicsItem *)rect3);
+    QCOMPARE(rect2->focusItem(), (QGraphicsItem *)rect3);
+    QCOMPARE(rect3->focusItem(), (QGraphicsItem *)rect3);
+    rect->setParentItem(text2);
+    QCOMPARE(text->focusItem(), (QGraphicsItem *)rect3);
+    QVERIFY(!rect->hasFocus());
+    QVERIFY(!rect2->hasFocus());
+    QVERIFY(rect3->hasFocus());
 }
 
 void tst_QGraphicsItem::focusProxyDeletion()
diff --git a/tests/auto/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp b/tests/auto/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
index 9249f6d..1ee8e51 100644
--- a/tests/auto/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
+++ b/tests/auto/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
@@ -554,6 +554,9 @@ void tst_QGraphicsProxyWidget::eventFilter()
     QFETCH(bool, fromObject);
 
     QGraphicsScene scene;
+    QEvent windowActivate(QEvent::WindowActivate);
+    qApp->sendEvent(&scene, &windowActivate);
+
     SubQGraphicsProxyWidget *proxy = new SubQGraphicsProxyWidget;
     scene.addItem(proxy);
 
@@ -682,18 +685,18 @@ void tst_QGraphicsProxyWidget::focusInEvent_data()
 // protected void focusInEvent(QFocusEvent* event)
 void tst_QGraphicsProxyWidget::focusInEvent()
 {
+    // ### This test is just plain old broken
     QFETCH(bool, widgetHasFocus);
     QFETCH(bool, widgetCanHaveFocus);
 
-    QGraphicsView view;
-    QGraphicsScene scene(&view);
+    QGraphicsScene scene;
+    QEvent windowActivate(QEvent::WindowActivate);
+    qApp->sendEvent(&scene, &windowActivate);
+
     SubQGraphicsProxyWidget *proxy = new SubQGraphicsProxyWidget;
     proxy->setEnabled(true);
     scene.addItem(proxy);
     proxy->setVisible(true);
-    view.show();
-    QApplication::setActiveWindow(&view);
-    view.activateWindow();
 
     QWidget *widget = new QWidget;
     widget->resize(100, 100);
@@ -706,7 +709,11 @@ void tst_QGraphicsProxyWidget::focusInEvent()
 
     proxy->setWidget(widget);
     proxy->setFlag(QGraphicsItem::ItemIsFocusable, true); // <- shouldn't need to do this
-    QTRY_VERIFY(widget->isVisible() && view.isVisible());
+
+    // ### This test is just plain old broken - sending a focus in event
+    // does not cause items to gain input focus. The widget has focus
+    // because the proxy has focus, not because it got this event.
+
     QFocusEvent event(QEvent::FocusIn, Qt::TabFocusReason);
     event.ignore();
     proxy->call_focusInEvent(&event);
@@ -776,6 +783,10 @@ void tst_QGraphicsProxyWidget::focusNextPrevChild()
     QGraphicsScene scene;
     QGraphicsView view(&scene);
     view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
+    QTest::qWait(250);
     if (hasScene) {
         scene.addItem(proxy);
         proxy->show();
@@ -819,6 +830,9 @@ void tst_QGraphicsProxyWidget::focusOutEvent()
     SubQGraphicsProxyWidget *proxy = new SubQGraphicsProxyWidget;
     scene.addItem(proxy);
     view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
     QApplication::setActiveWindow(&view);
     view.activateWindow();
     view.setFocus();
@@ -1084,6 +1098,7 @@ void tst_QGraphicsProxyWidget::keyPressEvent()
 #ifdef Q_WS_X11
     qt_x11_wait_for_window_manager(&view);
 #endif
+    QTest::qWait(250);
 
     SubQGraphicsProxyWidget *proxy = new SubQGraphicsProxyWidget;
     proxy->setFlag(QGraphicsItem::ItemIsFocusable, true); // ### remove me!!!
@@ -1122,6 +1137,10 @@ void tst_QGraphicsProxyWidget::keyReleaseEvent()
     QGraphicsScene scene;
     QGraphicsView view(&scene);
     view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
+    QTest::qWait(250);
 
     SubQGraphicsProxyWidget *proxy = new SubQGraphicsProxyWidget;
     proxy->setFlag(QGraphicsItem::ItemIsFocusable, true); // ### remove me!!!
diff --git a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
index f78c59e..6998684 100644
--- a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
+++ b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
@@ -1376,6 +1376,9 @@ void tst_QGraphicsScene::removeItem()
 void tst_QGraphicsScene::focusItem()
 {
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     QVERIFY(!scene.focusItem());
     QGraphicsItem *item = scene.addText("Qt");
     QVERIFY(!scene.focusItem());
@@ -1434,6 +1437,9 @@ protected:
 void tst_QGraphicsScene::focusItemLostFocus()
 {
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     FocusItem *item = new FocusItem;
     item->setTextInteractionFlags(Qt::TextEditorInteraction);
     scene.addItem(item);
@@ -1458,6 +1464,9 @@ void tst_QGraphicsScene::clear()
 void tst_QGraphicsScene::setFocusItem()
 {
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     QGraphicsItem *item = scene.addText("Qt");
     QVERIFY(!scene.focusItem());
     QVERIFY(!scene.hasFocus());
@@ -1885,6 +1894,9 @@ void tst_QGraphicsScene::mouseEventPropagation()
 
     // scene -> a -> b -> c -> d
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(a);
 
     // Prepare some events
@@ -2069,6 +2081,9 @@ void tst_QGraphicsScene::mouseEventPropagation_focus()
 
     // scene -> a -> b -> c -> d
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(a);
 
     // Prepare some events
@@ -2680,6 +2695,9 @@ void tst_QGraphicsScene::render()
 void tst_QGraphicsScene::contextMenuEvent()
 {
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     EventTester *item = new EventTester;
     scene.addItem(item);
     item->setFlag(QGraphicsItem::ItemIsFocusable);
@@ -3649,6 +3667,9 @@ void tst_QGraphicsScene::stickyFocus()
     QFETCH(bool, sticky);
 
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     QGraphicsTextItem *text = scene.addText("Hei");
     text->setTextInteractionFlags(Qt::TextEditorInteraction);
     text->setFocus();
@@ -3703,6 +3724,9 @@ void tst_QGraphicsScene::inputMethod()
     item->setFlags((QGraphicsItem::GraphicsItemFlags)flags);
 
     QGraphicsScene scene;
+    QEvent activate(QEvent::WindowActivate);
+    QApplication::sendEvent(&scene, &activate);
+
     scene.addItem(item);
     QInputMethodEvent event;
 
diff --git a/tests/auto/qgraphicsview/tst_qgraphicsview.cpp b/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
index bb0ea70..0b731d5 100644
--- a/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
+++ b/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
@@ -1938,6 +1938,7 @@ void tst_QGraphicsView::wheelEvent()
 #ifdef Q_WS_X11
     qt_x11_wait_for_window_manager(&view);
 #endif
+    QTest::qWait(250);
 
     // Send a wheel event with horizontal orientation.
     {
@@ -2941,10 +2942,10 @@ void tst_QGraphicsView::task239729_noViewUpdate()
     }
 
     view->show();
-    QTest::qWait(250);
 #ifdef Q_WS_X11
     qt_x11_wait_for_window_manager(view);
 #endif
+    QTest::qWait(250);
 
     EventSpy spy(view->viewport(), QEvent::Paint);
     QCOMPARE(spy.count(), 0);
@@ -3418,7 +3419,7 @@ void tst_QGraphicsView::exposeRegion()
     QRegion expectedExposeRegion = QRect(0, 0, 5, 5);
     expectedExposeRegion += QRect(viewport->rect().bottomRight() - QPoint(5, 5), QSize(5, 5));
     viewport->update(expectedExposeRegion);
-    qApp->processEvents();
+    QTest::qWait(125);
 
     // Make sure it triggers correct repaint on the view.
     QCOMPARE(view.lastUpdateRegions.size(), 1);
@@ -3488,7 +3489,7 @@ void tst_QGraphicsView::update()
     viewPrivate->processPendingUpdates();
     QVERIFY(viewPrivate->dirtyRegion.isEmpty());
     QVERIFY(viewPrivate->dirtyBoundingRect.isEmpty());
-    QTest::qWait(50);
+    QTest::qWait(150);
     if (!intersects) {
         QVERIFY(view.lastUpdateRegions.isEmpty());
     } else {
@@ -3504,6 +3505,11 @@ void tst_QGraphicsView::inputMethodSensitivity()
 {
     QGraphicsScene scene;
     QGraphicsView view(&scene);
+    view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
+    QTest::qWait(300);
 
     QGraphicsRectItem *item = new QGraphicsRectItem;
 
@@ -3571,11 +3577,12 @@ void tst_QGraphicsView::inputMethodSensitivity()
 
 class InputContextTester : public QInputContext
 {
+    Q_OBJECT
+public:
     QString identifierName() { return QString(); }
     bool isComposing() const { return false; }
     QString language() { return QString(); }
     void reset() { ++resets; }
-public:
     int resets;
 };
 
@@ -3583,10 +3590,17 @@ void tst_QGraphicsView::inputContextReset()
 {
     QGraphicsScene scene;
     QGraphicsView view(&scene);
+    QVERIFY(view.testAttribute(Qt::WA_InputMethodEnabled));
 
     InputContextTester inputContext;
     view.setInputContext(&inputContext);
 
+    view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
+    QTest::qWait(300);
+
     QGraphicsItem *item1 = new QGraphicsRectItem;
     item1->setFlags(QGraphicsItem::ItemIsFocusable | QGraphicsItem::ItemAcceptsInputMethod);
 
@@ -3596,6 +3610,8 @@ void tst_QGraphicsView::inputContextReset()
 
     inputContext.resets = 0;
     scene.setFocusItem(item1);
+    QCOMPARE(scene.focusItem(), (QGraphicsItem *)item1);
+    QVERIFY(view.testAttribute(Qt::WA_InputMethodEnabled));
     QCOMPARE(inputContext.resets, 0);
 
     inputContext.resets = 0;
diff --git a/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp b/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
index 20803a5..5296788 100644
--- a/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
+++ b/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
@@ -438,6 +438,8 @@ void tst_QGraphicsWidget::focusWidget()
     SubQGraphicsWidget *parent = new SubQGraphicsWidget;
     QCOMPARE(parent->focusWidget(), (QGraphicsWidget *)0);
     QGraphicsScene scene;
+    QEvent windowActivate(QEvent::WindowActivate);
+    qApp->sendEvent(&scene, &windowActivate);
     scene.addItem(parent);
 
     QFETCH(int, childCount);
@@ -459,7 +461,9 @@ void tst_QGraphicsWidget::focusWidget()
 void tst_QGraphicsWidget::focusWidget2()
 {
     QGraphicsScene scene;
-    
+    QEvent windowActivate(QEvent::WindowActivate);
+    qApp->sendEvent(&scene, &windowActivate);
+
     QGraphicsWidget *widget = new QGraphicsWidget;
     EventSpy focusInSpy(widget, QEvent::FocusIn);
     EventSpy focusOutSpy(widget, QEvent::FocusOut);
@@ -561,6 +565,9 @@ void tst_QGraphicsWidget::focusPolicy_data()
 void tst_QGraphicsWidget::focusPolicy()
 {
     QGraphicsScene scene;
+    QEvent windowActivate(QEvent::WindowActivate);
+    qApp->sendEvent(&scene, &windowActivate);
+
     SubQGraphicsWidget *widget = new SubQGraphicsWidget;
     scene.addItem(widget);
     QCOMPARE(Qt::NoFocus, widget->focusPolicy());
@@ -788,6 +795,12 @@ void tst_QGraphicsWidget::initStyleOption()
 {
     QGraphicsScene scene;
     QGraphicsView view(&scene);
+    view.show();
+#ifdef Q_WS_X11
+    qt_x11_wait_for_window_manager(&view);
+#endif
+    QTest::qWait(250);
+
     view.setAlignment(Qt::AlignTop | Qt::AlignLeft);
     SubQGraphicsWidget *widget = new SubQGraphicsWidget;
     widget->setAcceptsHoverEvents(true);
@@ -1183,6 +1196,8 @@ void tst_QGraphicsWidget::setTabOrderAndReparent()
 #ifdef Q_WS_X11
     qt_x11_wait_for_window_manager(&view);
 #endif
+    QTest::qWait(250);
+
     int i;
     QGraphicsWidget *w1, *w2, *w3, *w4;
     for (i = 1; i < 4; ++i) {