1 files changed, 100 insertions, 1 deletions

diff --git a/tests/auto/qgraphicsview/tst_qgraphicsview.cpp b/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
index b5af115..9368630 100644
--- a/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
+++ b/tests/auto/qgraphicsview/tst_qgraphicsview.cpp
@@ -187,6 +187,7 @@ private slots:
     void scrollAfterResize_data();
     void scrollAfterResize();
     void centerOnDirtyItem();
+    void mouseTracking();
 
     // task specific tests below me
     void task172231_untransformableItems();
@@ -2511,7 +2512,8 @@ void tst_QGraphicsView::replayMouseMove()
 
     // One mouse event should be translated into one scene event.
     for (int i = 0; i < 3; ++i) {
-        sendMouseMove(view.viewport(), view.viewport()->rect().center());
+        sendMouseMove(view.viewport(), view.viewport()->rect().center(),
+                      Qt::LeftButton, Qt::MouseButtons(Qt::LeftButton));
         QCOMPARE(viewSpy.count(), i + 1);
         QCOMPARE(sceneSpy.count(), i + 1);
     }
@@ -2701,6 +2703,7 @@ void tst_QGraphicsView::task186827_deleteReplayedItem()
     MouseMoveCounter view;
     view.setScene(&scene);
     view.show();
+    view.viewport()->setMouseTracking(true);
 #ifdef Q_WS_X11
     qt_x11_wait_for_window_manager(&view);
 #endif
@@ -3044,5 +3047,101 @@ void tst_QGraphicsView::centerOnDirtyItem()
     QCOMPARE(before, after);
 }
 
+void tst_QGraphicsView::mouseTracking()
+{
+    // Mouse tracking should only be automatically enabled if items either accept hover events
+    // or have a cursor set. We never disable mouse tracking if it is already enabled.
+
+    { // Make sure mouse tracking is disabled by default.
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        QGraphicsView view(&scene);
+        QVERIFY(!view.viewport()->hasMouseTracking());
+    }
+
+    { // Make sure we don't disable mouse tracking in setupViewport/setScene.
+        QGraphicsView view;
+        QWidget *viewport = new QWidget;
+        viewport->setMouseTracking(true);
+        view.setViewport(viewport);
+        QVERIFY(viewport->hasMouseTracking());
+
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        view.setScene(&scene);
+        QVERIFY(viewport->hasMouseTracking());
+    }
+
+    // Make sure we enable mouse tracking when having items that accept hover events.
+    {
+        // Adding an item to the scene after the scene is set on the view.
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        QGraphicsView view(&scene);
+
+        QGraphicsRectItem *item = new QGraphicsRectItem(10, 10, 10, 10);
+        item->setAcceptHoverEvents(true);
+        scene.addItem(item);
+        QVERIFY(view.viewport()->hasMouseTracking());
+    }
+    {
+        // Adding an item to the scene before the scene is set on the view.
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        QGraphicsRectItem *item = new QGraphicsRectItem(10, 10, 10, 10);
+        item->setAcceptHoverEvents(true);
+        scene.addItem(item);
+
+        QGraphicsView view(&scene);
+        QVERIFY(view.viewport()->hasMouseTracking());
+    }
+    {
+        // QGraphicsWidget implicitly accepts hover if it has window decoration.
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        QGraphicsView view(&scene);
+
+        QGraphicsWidget *widget = new QGraphicsWidget;
+        scene.addItem(widget);
+        QVERIFY(!view.viewport()->hasMouseTracking());
+        // Enable window decoraton.
+        widget->setWindowFlags(Qt::Window | Qt::WindowTitleHint);
+        QVERIFY(view.viewport()->hasMouseTracking());
+    }
+
+    // Make sure we enable mouse tracking when having items with a cursor set.
+    {
+        // Adding an item to the scene after the scene is set on the view.
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        QGraphicsView view(&scene);
+
+        QGraphicsRectItem *item = new QGraphicsRectItem(10, 10, 10, 10);
+        item->setCursor(Qt::CrossCursor);
+        scene.addItem(item);
+        QVERIFY(view.viewport()->hasMouseTracking());
+    }
+    {
+        // Adding an item to the scene before the scene is set on the view.
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        QGraphicsRectItem *item = new QGraphicsRectItem(10, 10, 10, 10);
+        item->setCursor(Qt::CrossCursor);
+        scene.addItem(item);
+
+        QGraphicsView view(&scene);
+        QVERIFY(view.viewport()->hasMouseTracking());
+    }
+
+    // Make sure we propagate mouse tracking to all views.
+    {
+        QGraphicsScene scene(-10000, -10000, 20000, 20000);
+        QGraphicsView view1(&scene);
+        QGraphicsView view2(&scene);
+        QGraphicsView view3(&scene);
+
+        QGraphicsRectItem *item = new QGraphicsRectItem(10, 10, 10, 10);
+        item->setCursor(Qt::CrossCursor);
+        scene.addItem(item);
+
+        QVERIFY(view1.viewport()->hasMouseTracking());
+        QVERIFY(view2.viewport()->hasMouseTracking());
+        QVERIFY(view3.viewport()->hasMouseTracking());
+    }
+}
+
 QTEST_MAIN(tst_QGraphicsView)
 #include "tst_qgraphicsview.moc"