Ensured that WA_InputMethodEnabled was set before FocusInEvent was sent.

When focusInEvent is called we need to ensure that WA_InputMethodEnabled
is set, since FocusInEvent might lead to that
QInputContext::setFocusWidget is called (with the QGraphicsView as the
widget parameter).
However, if the widget still does not have WA_InputMethodEnabled set
yet it will assert in QInputContext::setFocusWidget (it requires that
the widget has the flag set).

This was a problem for the morbit bridge, where Dui requires the
attribute to be set (while Orbit actually does not require)

Task-number: QTBUG-10276
Reviewed-by: jasplin
Reviewed-by: Alexis Menard

2 files changed, 27 insertions, 5 deletions

diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index b368a82..98fc10f 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -808,13 +808,13 @@ void QGraphicsScenePrivate::setFocusItemHelper(QGraphicsItem *item,
 #endif //QT_NO_IM
     }
 
-    if (item) {
+    if (item)
         focusItem = item;
+    updateInputMethodSensitivityInViews();
+    if (item) {
         QFocusEvent event(QEvent::FocusIn, focusReason);
         sendEvent(item, &event);
     }
-
-    updateInputMethodSensitivityInViews();
 }
 
 /*!
diff --git a/tests/auto/qgraphicsview/tst_qgraphicsview.cpp b/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
index 1c19fab..e3c699b 100644
--- a/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
+++ b/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
@@ -3664,6 +3664,22 @@ void tst_QGraphicsView::update()
 #endif
 }
 
+class FocusItem : public QGraphicsRectItem
+{
+public:
+    FocusItem() : QGraphicsRectItem(0, 0, 20, 20) {
+        m_viewHasIMEnabledInFocusInEvent = false;
+    }
+
+    void focusInEvent(QFocusEvent *event)
+    {
+        QGraphicsView *view = scene()->views().first();
+        m_viewHasIMEnabledInFocusInEvent = view->testAttribute(Qt::WA_InputMethodEnabled);
+    }
+
+    bool m_viewHasIMEnabledInFocusInEvent;
+};
+
 void tst_QGraphicsView::inputMethodSensitivity()
 {
     QGraphicsScene scene;
@@ -3673,7 +3689,7 @@ void tst_QGraphicsView::inputMethodSensitivity()
     QApplication::setActiveWindow(&view);
     QTRY_COMPARE(QApplication::activeWindow(), static_cast<QWidget *>(&view));
 
-    QGraphicsRectItem *item = new QGraphicsRectItem;
+    FocusItem *item = new FocusItem;
 
     view.setAttribute(Qt::WA_InputMethodEnabled, true);
 
@@ -3702,6 +3718,7 @@ void tst_QGraphicsView::inputMethodSensitivity()
     scene.setFocusItem(item);
     QCOMPARE(scene.focusItem(), static_cast<QGraphicsItem *>(item));
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), true);
+    QCOMPARE(item->m_viewHasIMEnabledInFocusInEvent, true);
 
     item->setFlag(QGraphicsItem::ItemAcceptsInputMethod, false);
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), false);
@@ -3710,15 +3727,17 @@ void tst_QGraphicsView::inputMethodSensitivity()
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), true);
 
     // introduce another item that is focusable but does not accept input methods
-    QGraphicsRectItem *item2 = new QGraphicsRectItem;
+    FocusItem *item2 = new FocusItem;
     item2->setFlag(QGraphicsItem::ItemIsFocusable);
     scene.addItem(item2);
     scene.setFocusItem(item2);
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), false);
+    QCOMPARE(item2->m_viewHasIMEnabledInFocusInEvent, false);
     QCOMPARE(scene.focusItem(), static_cast<QGraphicsItem *>(item2));
 
     scene.setFocusItem(item);
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), true);
+    QCOMPARE(item->m_viewHasIMEnabledInFocusInEvent, true);
     QCOMPARE(scene.focusItem(), static_cast<QGraphicsItem *>(item));
 
     view.setScene(0);
@@ -3727,10 +3746,12 @@ void tst_QGraphicsView::inputMethodSensitivity()
 
     view.setScene(&scene);
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), true);
+    QCOMPARE(item->m_viewHasIMEnabledInFocusInEvent, true);
     QCOMPARE(scene.focusItem(), static_cast<QGraphicsItem *>(item));
 
     scene.setFocusItem(item2);
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), false);
+    QCOMPARE(item2->m_viewHasIMEnabledInFocusInEvent, false);
     QCOMPARE(scene.focusItem(), static_cast<QGraphicsItem *>(item2));
 
     view.setScene(0);
@@ -3743,6 +3764,7 @@ void tst_QGraphicsView::inputMethodSensitivity()
 
     view.setScene(&scene);
     QCOMPARE(view.testAttribute(Qt::WA_InputMethodEnabled), true);
+    QCOMPARE(item->m_viewHasIMEnabledInFocusInEvent, true);
     QCOMPARE(scene.focusItem(), static_cast<QGraphicsItem *>(item));
 }