Implement QWindow::close()

Implement the public slot QWindow::close() and add the correspondent test.

Change-Id: If3f07cce3b26640f06fc52d0e4dca875d9894b3d
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/gui/kernel/qwindow.cpp

@@ -845,8 +845,28 @@ void QWindow::showNormal()
 
 bool QWindow::close()
 {
-    //should we have close?
-    qDebug() << "unimplemented:" << __FILE__ << __LINE__;
+    Q_D(QWindow);
+
+    // Do not close non top level windows
+    if (parent())
+        return false;
+
+    if (QGuiApplicationPrivate::focus_window == this)
+        QGuiApplicationPrivate::focus_window = 0;
+
+    QObjectList childrenWindows = children();
+    for (int i = 0; i < childrenWindows.size(); i++) {
+        QObject *object = childrenWindows.at(i);
+        if (object->isWindowType()) {
+            QWindow *w = static_cast<QWindow*>(object);
+            QGuiApplicationPrivate::window_list.removeAll(w);
+            w->destroy();
+        }
+    }
+
+    QGuiApplicationPrivate::window_list.removeAll(this);
+    destroy();
+    d->maybeQuitOnLastWindowClosed();
     return true;
 }
 

tests/auto/gui/kernel/qwindow/tst_qwindow.cpp

@@ -58,6 +58,7 @@ private slots:
     void mouseToTouchTranslation();
     void mouseToTouchLoop();
     void orientation();
+    void close();
     void initTestCase()
     {
         touchDevice = new QTouchDevice;
@@ -503,5 +504,20 @@ void tst_QWindow::orientation()
     QCOMPARE(spy.count(), 1);
 }
 
+void tst_QWindow::close()
+{
+    QWindow a;
+    QWindow b;
+    QWindow c(&a);
+
+    a.show();
+    b.show();
+
+    // we can not close a non top level window
+    QVERIFY(!c.close());
+    QVERIFY(a.close());
+    QVERIFY(b.close());
+}
+
 #include <tst_qwindow.moc>
 QTEST_MAIN(tst_QWindow);