Improved the support for input methods in Graphics View.

This patch improves the graphics view support for input
methods in several ways:

  * A new ItemAcceptsInputMethod flag is introduced to serve
    the same purpose for graphics items as WA_InputMethodEnabled
    does for widgets: Input method support can be controlled
    individually for each item.
  * The input method sensitivity of a view (i.e. the value of
    the WA_InputMethodEnabled flag) is updated dynamically
    whenever the input method support of the current focus
    item may change.
  * Input contexts are reset whenever an item that supports
    input methods loses focus.

Reviewed-by: janarve
Task-number: 254492

1 files changed, 58 insertions, 0 deletions

diff --git a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
index 4247cca3eb..d325f0f5d3 100644
--- a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
+++ b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
@@ -252,6 +252,8 @@ private slots:
     void stickyFocus_data();
     void stickyFocus();
     void sendEvent();
+    void inputMethod_data();
+    void inputMethod();
 
     // task specific tests below me
     void task139710_bspTreeCrash();
@@ -3614,5 +3616,61 @@ void tst_QGraphicsScene::sendEvent()
     QCOMPARE(spy->count(), 1);
 }
 
+void tst_QGraphicsScene::inputMethod_data()
+{
+    QTest::addColumn<int>("flags");
+    QTest::addColumn<bool>("callFocusItem");
+    QTest::newRow("0") << 0 << false;
+    QTest::newRow("1") << (int)QGraphicsItem::ItemAcceptsInputMethod << false;
+    QTest::newRow("2") << (int)QGraphicsItem::ItemIsFocusable << false;
+    QTest::newRow("3") <<
+        (int)(QGraphicsItem::ItemAcceptsInputMethod|QGraphicsItem::ItemIsFocusable) << true;
+}
+
+class InputMethodTester : public QGraphicsRectItem
+{
+    void inputMethodEvent(QInputMethodEvent *) { ++eventCalls; }
+    QVariant inputMethodQuery(Qt::InputMethodQuery) const { ++queryCalls; return QVariant(); }
+public:
+    int eventCalls;
+    mutable int queryCalls;
+};
+
+void tst_QGraphicsScene::inputMethod()
+{
+    QFETCH(int, flags);
+    QFETCH(bool, callFocusItem);
+
+    InputMethodTester *item = new InputMethodTester;
+    item->setFlags((QGraphicsItem::GraphicsItemFlags)flags);
+
+    QGraphicsScene scene;
+    scene.addItem(item);
+    QInputMethodEvent event;
+
+    scene.setFocusItem(item);
+    QCOMPARE(!!(item->flags() & QGraphicsItem::ItemIsFocusable), scene.focusItem() == item);
+
+    item->eventCalls = 0;
+    qApp->sendEvent(&scene, &event);
+    QCOMPARE(item->eventCalls, callFocusItem ? 1 : 0);
+
+    item->queryCalls = 0;
+    scene.inputMethodQuery((Qt::InputMethodQuery)0);
+    QCOMPARE(item->queryCalls, callFocusItem ? 1 : 0);
+
+    scene.setFocusItem(0);
+    QCOMPARE(item->eventCalls, callFocusItem ? 2 : 0); // verify correct delivery of "reset" event
+    QCOMPARE(item->queryCalls, callFocusItem ? 1 : 0); // verify that value is unaffected
+
+    item->eventCalls = 0;
+    qApp->sendEvent(&scene, &event);
+    QCOMPARE(item->eventCalls, 0);
+
+    item->queryCalls = 0;
+    scene.inputMethodQuery((Qt::InputMethodQuery)0);
+    QCOMPARE(item->queryCalls, 0);
+}
+
 QTEST_MAIN(tst_QGraphicsScene)
 #include "tst_qgraphicsscene.moc"