Implement alertion state for windows.

Add QWindow::alert() and QPlatformWindow::setAlertState().
Add logic to clear alertion state when the window becomes
active. The platform plugins then only need to implement a setter
and a cheap getter and need not handle activation.

Prototypically implement X11 and Windows.

Task-number: QTBUG-30416
Change-Id: Ia70c4722d812462a21f4034b7d52735c9f2bc49c
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/src/widgets/kernel/qapplication_qpa.cpp b/src/widgets/kernel/qapplication_qpa.cpp
index 54eb443c43..0d929f367b 100644
--- a/src/widgets/kernel/qapplication_qpa.cpp
+++ b/src/widgets/kernel/qapplication_qpa.cpp
@@ -55,6 +55,7 @@
 #include <qdesktopwidget.h>
 #include <qpa/qplatformcursor.h>
 #include <qpa/qplatformtheme.h>
+#include <qpa/qplatformwindow.h>
 
 #include <qdebug.h>
 #include <qpa/qwindowsysteminterface.h>
@@ -410,8 +411,17 @@ void QApplication::beep()
 {
 }
 
-void QApplication::alert(QWidget *, int)
+void QApplication::alert(QWidget *widget, int duration)
 {
+    if (widget) {
+       if (widget->window()->isActiveWindow()&& !widget->window()->windowState() & Qt::WindowMinimized)
+            return;
+        if (QWindow *window= QApplicationPrivate::windowForWidget(widget))
+            window->alert(duration);
+    } else {
+        foreach (QWidget *topLevel, topLevelWidgets())
+            QApplication::alert(topLevel, duration);
+    }
 }
 
 void qt_init(QApplicationPrivate *priv, int type)