No more enter & leave events after a popup menu is closed on Windows

We use the TrackMouseEvent() to keep track of enter and leave messages.
Upon receiving a WM_MOUSELEAVE, the effect of that function call is over,
we need to call it again if we need more messages. This was not done when
we close a popup because of mouse click outside.

Task-number: QTBUG-11582
Reviewed-by: Bradley T. Hughes

1 files changed, 20 insertions, 3 deletions

diff --git a/src/gui/kernel/qapplication_win.cpp b/src/gui/kernel/qapplication_win.cpp
index 2a85fdc..ef719ca 100644
--- a/src/gui/kernel/qapplication_win.cpp
+++ b/src/gui/kernel/qapplication_win.cpp
@@ -3065,6 +3065,11 @@ bool QETWidget::translateMouseEvent(const MSG &msg)
             break;
         }
     }
+#ifndef Q_OS_WINCE
+    static bool trackMouseEventLookup = false;
+    typedef BOOL (WINAPI *PtrTrackMouseEvent)(LPTRACKMOUSEEVENT);
+    static PtrTrackMouseEvent ptrTrackMouseEvent = 0;
+#endif
     state  = translateButtonState(msg.wParam, type, button); // button state
     const QPoint widgetPos = mapFromGlobal(QPoint(msg.pt.x, msg.pt.y));
     QWidget *alienWidget = !internalWinId() ? this : childAt(widgetPos);
@@ -3129,9 +3134,6 @@ bool QETWidget::translateMouseEvent(const MSG &msg)
 #ifndef Q_OS_WINCE
 
             if (curWin != 0) {
-                static bool trackMouseEventLookup = false;
-                typedef BOOL (WINAPI *PtrTrackMouseEvent)(LPTRACKMOUSEEVENT);
-                static PtrTrackMouseEvent ptrTrackMouseEvent = 0;
                 if (!trackMouseEventLookup) {
                     trackMouseEventLookup = true;
                     ptrTrackMouseEvent = (PtrTrackMouseEvent)QLibrary::resolve(QLatin1String("comctl32"), "_TrackMouseEvent");
@@ -3245,6 +3247,21 @@ bool QETWidget::translateMouseEvent(const MSG &msg)
             qt_button_down = 0;
         }
 
+#ifndef Q_OS_WINCE
+        if (type == QEvent::MouseButtonPress
+            && QApplication::activePopupWidget() != activePopupWidget
+            && ptrTrackMouseEvent
+            && curWin) {
+            // Since curWin is already the window we clicked on,
+            // we have to setup the mouse tracking here.
+            TRACKMOUSEEVENT tme;
+            tme.cbSize = sizeof(TRACKMOUSEEVENT);
+            tme.dwFlags = 0x00000002;    // TME_LEAVE
+            tme.hwndTrack = curWin;      // Track on window receiving msgs
+            tme.dwHoverTime = (DWORD)-1; // HOVER_DEFAULT
+            ptrTrackMouseEvent(&tme);
+        }
+#endif
         if (type == QEvent::MouseButtonPress
             && QApplication::activePopupWidget() != activePopupWidget
             && replayPopupMouseEvent) {