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Re: Coordinate in HandleControlSetCursor and kEventControlSetCursor


On Nov 9, 2005, at 10:09 PM, Laurence Harris wrote:

On 11/9/05 5:49 PM, Stephen Chu didst favor us with:

In what coordinate should I pass the mouse location to
HandleControlSetCursor? The header says nothing other than the name
localPoint. I assume it's port-local?

And kEventParamMouseLocation in kEventControlSetCursor is said to
have view-local coordinate in composited window. But it seems to have
whatever point value passed to HandleControlSetCursor which is port-
local. If this is true, that composited or not doesn't make a
difference then, right?

I believe you need to use view-local coordinates if the window is composited
and port-local coordinates if not.

Do you mean I have to convert the mouse location to view-local before passing it to kEventWindowCursorChange?

BTW. What's the right way of doing cursor change? I currently have a kEventWindowCursorChange handler installed on the window and it in turn calls HandleControlSetCursor on the view where the mouse is in. If the view doesn't set the cursor, I then find out which part of it is hit by the mouse. If it's kControlEditTextPart then I set the cursor to I beam, or arrow otherwise. This seems to work pretty well since most of the canned controls need either I beam or arrow cursor.

My custom view handles kEventControlSetCursor to set it's various custom cursors. And it gets called by HandleControlSetCursor. If only I can get this coordinate systems thing right...

--
Stephen Chu <mailto:email@hidden>
Rampage Systems, Inc. <http://www.rampageinc.com/>

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 >Re: Coordinate in HandleControlSetCursor and kEventControlSetCursor (From: Laurence Harris <email@hidden>)



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