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making clear areas in components

People,

I am writing a component which requires the image drawn on the form (owners) canvas to be seen through areas. I have neem using the canvas.copyrect function though this requires that the form be repainted with the component set to invisible then made visible again. Obviously the form flickers like mad. Any suggestions on making this appear flicker free.

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kretzschmar

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robert_marquardt

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ginsonic

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Stuart_Johnson

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bobspencerr

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I have set the image property to doublebuffer, Created a second bitmap and use bitblt to paint to the original and use the invalidaterect function to limit the repaint region. All of this has made the component load fantastically and achieves what I was aiming for. However, the refresh rate of the region is now slow when the mouse moves over it. I only collect the x and the y in this section of code and then draw a line from a point specified toi the new point. It is quite noticible that there is a small delay in the speed of the mouse pointer. Any other suggestions??

pnh73

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:

Split between kretzschmar and robert_marquardt and ginsonic and Stuart Johnson

Please leave any comments here within the next seven days.

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Paul (pnh73)
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