Find the topmost window under a mouse cursor
anthony.petrov at oracle.com
Tue Mar 27 03:23:21 PDT 2012
On 3/27/2012 2:19 PM, Dmitry Cherepanov wrote:
>> I suggest to track the MouseIsOver state with a boolean flag per
>> window, and send a synthetic Entered event upon receiving any other
>> mouse event (Moved, Clicked, etc.)
> We should probably synthesize such mouse enter/exit events upon changing
> window's bounds. Synthesizing the mouse enter/exit event upon receiving
> any other mouse event wouldn't changes the mouse cursor until the user
> performs any mouse action.
Is this exact behavior specified anywhere (i.e. that the cursor must be
updated as soon as a component appears under the mouse even if the mouse
holds still)? If not, I'd just state that the behavior is platform-specific.
>> if the flag indicates we haven't yet sent an Entered event for this
>> window. The flag should be set/reset in the Entered/Exited mouse
>> We use this approach in FX and everyone seems to be happy about that.
>> best regards,
>> On 3/27/2012 12:08 PM, Alexander Scherbatiy wrote:
>>> Does the Mac OS X contains a method that allows to find the topmost
>>> window under a mouse cursor?
>>> There is the issue when a window is created under a mouse cursor or
>>> it is moved under a mouse cursor the system does not generate the
>>> NSMouseEntered event.
>>> It is possible to synthetically generate the MouseEntered event for
>>> window creation and moving in Java because we need that a window
>>> behavior on Mac OS X was the same as on others platforms.
>>> But it is necessary to have a way to know is this window the topmost
>>> under a mouse cursor.
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