Drawing canvas output without background image

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Drawing canvas output without background image

Postby awhughes » Mon Mar 25, 2019 10:30 am

Hello all,

I have an installation going out shortly that involves crowd drawing on a touchscreen in WDv6 and the output being projected onto an object via projector.

I want to put an image behind the drawing canvas so people can roughly trace the object but I don't want this background image to show up on the output (secondary monitor) is there any way of doing this nicely?

Running WDPro v6
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Re: Drawing canvas output without background image

Postby awhughes » Tue Mar 26, 2019 12:11 pm

How about another way of doing this, Is there a nice way to get one Drawing canvases drawing to copy to another drawing canvas so I can just output that on another window?
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Re: Drawing canvas output without background image

Postby frozenwaffles » Thu Apr 04, 2019 11:12 am

did you end up getting this to work?
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Re: Drawing canvas output without background image

Postby Janina Baltaziewicz » Tue Apr 09, 2019 10:13 am

For whom it may concern:

The WD Drawing Canvas was created a long time ago for the purpose of manually drawing a mask or something similar, by using the WD GUI as live input source for PB.
The PB Canvas has long ago replaced this functionality, which is why the Drawing Canvas is now more or less just a little gimmick for playing around and does not have much scripting functionality.
It is not possible to link several Drawing Canvas widgets to achieve the mentioned goal.

But for this specific case, we came up with a solution:
What you can do is having the background image very faintly in WD and again use the WD GUI as live input into any kind of media server. You can then key out everything besides the colourful line.
For achieving this, you only need to place the background image BEHIND the Drawing Canvas and then assign a transparancy to the Drawing Canvas via CSS in the Custom HTML Header:
https://www.coolux.de/root/downloads/su ... enu_wd.htm

This syntax has worked for me when I tested it:
<style>
#BackgroundWidgetDrawingCanvas1{
opacity: 0.75;
}
</style>

I hope this helps!
Janina
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