QQuickWidget: pass enter and leave events to the offscreen window

By passing the enter and leave events to the offscreen window it will
enable mouse areas inside a QQuickWidget to know when the mouse has
actually entered or left the area if it is covering the whole item.

Task-number: QTBUG-45557
Change-Id: I670ebe30e367e919c73fed449bf2bed7ca42b5fd
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>

2 files changed, 37 insertions, 0 deletions

diff --git a/tests/auto/quickwidgets/qquickwidget/data/enterleave.qml b/tests/auto/quickwidgets/qquickwidget/data/enterleave.qml
new file mode 100644
index 0000000000..b3057e30ad
--- /dev/null
+++ b/tests/auto/quickwidgets/qquickwidget/data/enterleave.qml
@@ -0,0 +1,12 @@
+import QtQuick 2.0
+
+Rectangle {
+    property bool hasMouse: mouseArea.containsMouse
+    height: 200
+    width: 200
+    MouseArea {
+        id: mouseArea
+        hoverEnabled: true
+        anchors.fill: parent
+    }
+}
diff --git a/tests/auto/quickwidgets/qquickwidget/tst_qquickwidget.cpp b/tests/auto/quickwidgets/qquickwidget/tst_qquickwidget.cpp
index ee49c9c7ad..e4991a5f26 100644
--- a/tests/auto/quickwidgets/qquickwidget/tst_qquickwidget.cpp
+++ b/tests/auto/quickwidgets/qquickwidget/tst_qquickwidget.cpp
@@ -61,6 +61,7 @@ private slots:
     void nullEngine();
     void keyEvents();
     void shortcuts();
+    void enterLeave();
 };
 
 
@@ -408,6 +409,30 @@ void tst_qquickwidget::shortcuts()
     QTRY_VERIFY(filter.shortcutOk);
 }
 
+void tst_qquickwidget::enterLeave()
+{
+    QQuickWidget view;
+    view.setSource(testFileUrl("enterleave.qml"));
+
+    // Ensure it is not inside the window first
+    QCursor::setPos(QPoint(50, 50));
+    QTRY_VERIFY(QCursor::pos() == QPoint(50, 50));
+
+    view.move(100, 100);
+    view.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&view, 5000));
+    QQuickItem *rootItem = view.rootObject();
+    QVERIFY(rootItem);
+
+    QTRY_VERIFY(!rootItem->property("hasMouse").toBool());
+    // Check the enter
+    QCursor::setPos(view.pos() + QPoint(50, 50));
+    QTRY_VERIFY(rootItem->property("hasMouse").toBool());
+    // Now check the leave
+    QCursor::setPos(view.pos() - QPoint(50, 50));
+    QTRY_VERIFY(!rootItem->property("hasMouse").toBool());
+}
+
 QTEST_MAIN(tst_qquickwidget)
 
 #include "tst_qquickwidget.moc"