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Re: How to create a custom cursor using Carbon ?
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Re: How to create a custom cursor using Carbon ?


On May 23, 2006, at 12:01 AM, Graeme Gill wrote:

It's not that complicated. For my particular window, I want to make
sure that the cursor can't get in front of it. So either the
cursor should be hidden whenever its in my window, or it should
switch to a transparent cursor. Having the window manager
switch the cursor is what I'd like, since I don't want to
have to create a thread to service window events.

Since Carbon does not support automatic cursor switching, let's consider approaches that allow you to do it manually. It does seem to me that you could implement this quite easily using two event handlers for kEventWindowCursorChange and kEventMouseMoved. Install these on the application event target. When you get the CursorChange event, check the window parameter in the event; if it's the window that should hide the mouse, then hide it with HideCursor(). When you get the MouseMoved event, you'll know that the mouse is not over one of your windows, so you can show the cursor with ShowCursor(). I wrote a quick test app that does this and, at a first approximation, it seems to work pretty well.

You mentioned in a previous message that when you clicked in the window, the cursor became visible again. I didn't see that problem for normal clicks in my test window, but I was just using standard HIToolbox controls. What kind of content does your window use - standard controls, or your own custom content?

-eric


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References: 


 >How to create a custom cursor using Carbon ? (From: Graeme Gill <email@hidden>)


 >Re: How to create a custom cursor using Carbon ? (From: Eric Schlegel <email@hidden>)


 >Re: How to create a custom cursor using Carbon ? (From: Graeme Gill <email@hidden>)


 >Re: How to create a custom cursor using Carbon ? (From: Eric Schlegel <email@hidden>)


 >Re: How to create a custom cursor using Carbon ? (From: Graeme Gill <email@hidden>)


 >Re: How to create a custom cursor using Carbon ? (From: Eric Schlegel <email@hidden>)


 >Re: How to create a custom cursor using Carbon ? (From: Graeme Gill <email@hidden>)























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