Merge lp:~mardy/unity-2d/menu-handling into lp:unity-2d

[Alberto Mardegan]

[panel] IndicatorsManager: deliver synthetic mouse motion events to Qt

By feeding mouse motion events to Qt while the panel-service is grabbing the
mouse, we ensure that Qt can generate correct enter/leave events for the panel
widgets (and especially for the IndicatorEntry widgets).

[Florian Boucault (fboucault)]

Fixes all 4 bugs as advertised.
Great job!

review: Approve

=== modified file 'libunity-2d-private/src/indicatorsmanager.cpp'
--- libunity-2d-private/src/indicatorsmanager.cpp	2011-08-22 09:17:03 +0000
+++ libunity-2d-private/src/indicatorsmanager.cpp	2011-08-23 13:48:43 +0000
@@ -124,7 +124,30 @@
 {
     // Called by m_mouseTrackerTimer to implement mouse scrubbing
     // (Assuming item A menu is opened, move mouse over item B => item B menu opens)
-    QWidget* widget = QApplication::widgetAt(QCursor::pos());
+    // Also, delivers motion events to Qt, which will generate correct
+    // enter/leave events for IndicatorEntry widgets.
+    QPoint pos = QCursor::pos();
+    QWidget* widget = QApplication::widgetAt(pos);
+    Display* display = QX11Info::display();
+
+    QPoint relPos = widget != 0 ? widget->mapFromGlobal(pos) : pos;
+    XMotionEvent event = {
+        MotionNotify,
+        0,
+        False,
+        display,
+        widget != 0 ? widget->effectiveWinId() : 0,
+        widget != 0 ? RootWindow(display, widget->x11Info().screen()) : 0,
+        0,
+        CurrentTime,
+        pos.x(), pos.y(),
+        relPos.x(), relPos.y(),
+        0,
+        False,
+        True
+    };
+    qApp->x11ProcessEvent(reinterpret_cast<XEvent*>(&event));
+
     IndicatorEntryWidget* entryWidget = qobject_cast<IndicatorEntryWidget*>(widget);
     if (!entryWidget) {
         return;