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.htmThis syntax has worked for me when I tested it:
<style>
#BackgroundWidgetDrawingCanvas1{
opacity: 0.75;
}
</style>
I hope this helps!
Janina