Hi everyone,
For those following at home, maxiaw_ wrote into the support desk to ask about this. We discussed using two widgets, one for the background color of the slider and one for the foreground, along with Axure RP 8’s ability to set the size of any widget. With this new feature, you can use a draggable dynamic panel to set the size of a widget representing the foreground color so that it looks like the space to the left of the draggable control (or to the bottom, or however your slider is configured) is filling up with color. I’ve put together a quick example of how this might work in the attached file; please take a look!
Hope that helps!
Slider.rp (51.8 KB)