Make tooltips transparent for mouse events.

This behavior is important because controls (widgets) 
under tooltips don't receive mouse events and don't 
update their state if it is really needed.

[ChangeLog][QtWidgets][Important behavior changes] 
Tooltips on OS X are now transparent for mouse events.

Change-Id: I06403db7b66c87fe53debb033f8a74aa1c93e26a
Task-number: QTBUG-46379
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/plugins/platforms/cocoa/qnsview.mm b/src/plugins/platforms/cocoa/qnsview.mm
index f27335d752..1ec33df744 100644
--- a/src/plugins/platforms/cocoa/qnsview.mm
+++ b/src/plugins/platforms/cocoa/qnsview.mm
@@ -704,8 +704,12 @@ QT_WARNING_POP
 
     // Popups implicitly grap mouse events; forward to the active popup if there is one
     if (QCocoaWindow *popup = QCocoaIntegration::instance()->activePopupWindow()) {
-        if (QNSView *popupView = popup->qtView())
-            targetView = popupView;
+        // Tooltips must be transparent for mouse events
+        // The bug reference is QTBUG-46379
+        if (!popup->m_windowFlags.testFlag(Qt::ToolTip)) {
+            if (QNSView *popupView = popup->qtView())
+                targetView = popupView;
+        }
     }
 
     [targetView convertFromScreen:[self screenMousePoint:theEvent] toWindowPoint:&qtWindowPoint andScreenPoint:&qtScreenPoint];