Add framestrut mouse events.

- Add infrastructure to QWindowSystemInterface.
- Add a setter for enabling framestrut events
  to QPlatformWindow.
- Add Windows implementation, pass keyboard modifiers.

QDockWidget relies on it for docking.

Task-number: QTBUG-26296
Change-Id: I9d84b356e9a5eb341f57b6f51f34b6b494ff7f87
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformwindow_qpa.cpp b/src/gui/kernel/qplatformwindow_qpa.cpp
index d2ec6833b0..3c2246cf00 100644
--- a/src/gui/kernel/qplatformwindow_qpa.cpp
+++ b/src/gui/kernel/qplatformwindow_qpa.cpp
@@ -374,6 +374,29 @@ bool QPlatformWindow::startSystemResize(const QPoint &pos, Qt::Corner corner)
 }
 
 /*!
+    Reimplement this method to set whether frame strut events
+    should be sent to \a enabled.
+
+    \sa frameStrutEventsEnabled
+*/
+
+void QPlatformWindow::setFrameStrutEventsEnabled(bool enabled)
+{
+    if (enabled)
+        qWarning("This plugin does not support frame strut events.");
+}
+
+/*!
+    Reimplement this method to return whether
+    frame strut events are enabled.
+*/
+
+bool QPlatformWindow::frameStrutEventsEnabled() const
+{
+    return false;
+}
+
+/*!
     \class QPlatformWindow
     \since 4.8
     \internal