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greubel
Visitor

roImageCanvas and ClearLayer()

Stupid question !

I have a canvas with 5 layers. I have an image on index 1 that I want to reposition. I have tried everything to try and delete the first instance and reposition the image to a new location. All I get is multiple images.

How do I delete the image ? I tried everything except to delete the canvas and start over, Clear(), ClearLayer(), SetLayer(), SwapLayer().

What I'm trying to do is a screen saver that moves an image and text around the screen .
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4 REPLIES 4
kbenson
Visitor

Re: roImageCanvas and ClearLayer()

Are you using multiple canvas objects? From what I remember, I haven't had any problems with this on a single canvas, but multiple canvas items require you to call .show() on the back ones first (with a small delay between them), otherwise the back canvas can't refresh and wipe out any drawing that happened on top of it.
-- GandK Labs
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TheEndless
Channel Surfer

Re: roImageCanvas and ClearLayer()

If you're using a single canvas, then calling SetLayer() on that layer should replace anything that's currently on it with the new content.
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renojim
Community Streaming Expert

Re: roImageCanvas and ClearLayer()

Are you using "Source_Over"? ClearLayer() won't work like you want if you're using "Source_Over".

-JT
Roku Community Streaming Expert

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greubel
Visitor

Re: roImageCanvas and ClearLayer()

Yes, I am using "Source_Over" !

Thanks !
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