Added a QTest::qWaitForWindowShown function that waits for window manager on X11.

On X11 it calls the qt_x11_wait_for_window_manager from QtGui,
allowing to wait until the window has been mapped and reparented into
a frame decoration parent.

Reviewed-by: Olivier Goffart

3 files changed, 34 insertions, 0 deletions

diff --git a/doc/src/snippets/code/src_qtestlib_qtestcase.cpp b/doc/src/snippets/code/src_qtestlib_qtestcase.cpp
index bf2a897..951dfbb 100644
--- a/doc/src/snippets/code/src_qtestlib_qtestcase.cpp
+++ b/doc/src/snippets/code/src_qtestlib_qtestcase.cpp
@@ -225,5 +225,11 @@ void MyTestClass::cleanup()
 QTest::qSleep(250);
 //! [23]
 
+//! [24]
+QWidget widget;
+widget.show();
+QTest::qWaitForWindowShown(&widget);
+//! [24]
+
 }
 
diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index 74c3af9..96f8a1b 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -731,6 +731,16 @@ QT_BEGIN_NAMESPACE
     \sa QTest::qSleep()
 */
 
+/*! \fn void QTest::qWaitForWindowManager(QWidget *window)
+
+    Waits until the window is shown in the screen. This is mainly useful for
+    asynchronous systems like X11, where a window will be mapped to screen some
+    time after being asked to show itself on the screen.
+
+    Example:
+    \snippet doc/src/snippets/code/src_qtestlib_qtestcase.cpp 24
+*/
+
 /*!
     \class QTest::QTouchEventSequence
     \inmodule QtTest
diff --git a/src/testlib/qtestsystem.h b/src/testlib/qtestsystem.h
index bdcc826..540b18d 100644
--- a/src/testlib/qtestsystem.h
+++ b/src/testlib/qtestsystem.h
@@ -52,6 +52,11 @@ QT_BEGIN_NAMESPACE
 
 QT_MODULE(Test)
 
+class QWidget;
+#ifdef Q_WS_X11
+extern void qt_x11_wait_for_window_manager(QWidget *w);
+#endif
+
 namespace QTest
 {
     inline static void qWait(int ms)
@@ -65,6 +70,19 @@ namespace QTest
             QTest::qSleep(10);
         } while (timer.elapsed() < ms);
     }
+
+    inline static bool qWaitForWindowShown(QWidget *window)
+    {
+#if defined(Q_WS_X11)
+        qt_x11_wait_for_window_manager(window);
+#elif defined(Q_WS_QWS)
+        qWait(100);
+#else
+        qWait(50);
+#endif
+        return true;
+    }
+
 }
 
 QT_END_NAMESPACE