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, 13 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 9b2b67619d..2a5e08cf41 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -1802,6 +1802,19 @@ QWindowsWindow *QWindowsWindow::childAt(const QPoint &clientPoint, unsigned cwex
 }
 
 #ifndef Q_OS_WINCE
+void QWindowsWindow::setAlertState(bool enabled)
+{
+    if (isAlertState() == enabled)
+        return;
+    if (enabled) {
+        alertWindow(0);
+        setFlag(AlertState);
+    } else {
+        stopAlertWindow();
+        clearFlag(AlertState);
+    }
+}
+
 void QWindowsWindow::alertWindow(int durationMs)
 {
     DWORD timeOutMs = GetCaretBlinkTime();