doc: Added note explaining grabMouse() for Cocoa and Carbon.

Task-number:  	 QTBUG-6810
(cherry picked from commit 190f45bcc7383bdc68a904e7dd5780372d00afba)

1 files changed, 10 insertions, 4 deletions

diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index d6380e1..f6ae581 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -11872,16 +11872,20 @@ void QWidget::ungrabGesture(Qt::GestureType gesture)
     mouse when a mouse button is pressed and keeps it until the last
     button is released.
 
-    Note that only visible widgets can grab mouse input. If
-    isVisible() returns false for a widget, that widget cannot call
-    grabMouse().
+    \note Only visible widgets can grab mouse input. If isVisible()
+    returns false for a widget, that widget cannot call grabMouse().
+
+    \note \bold{(Mac OS X developers)} For \e Cocoa, calling
+    grabMouse() on a widget only works when the mouse is inside the
+    frame of that widget.  For \e Carbon, it works outside the widget's
+    frame as well, like for Windows and X11.
 
     \sa releaseMouse() grabKeyboard() releaseKeyboard()
 */
 
 /*!
     \fn void QWidget::grabMouse(const QCursor &cursor)
-    \overload
+    \overload grabMouse()
 
     Grabs the mouse input and changes the cursor shape.
 
@@ -11891,6 +11895,8 @@ void QWidget::ungrabGesture(Qt::GestureType gesture)
 
     \warning Grabbing the mouse might lock the terminal.
 
+    \note \bold{(Mac OS X developers)} See the note in QWidget::grabMouse().
+
     \sa releaseMouse(), grabKeyboard(), releaseKeyboard(), setCursor()
 */