Update LookAndFeelSlider method dynamically

Audio Plugins
1

Currently I have overriden a slider using LookAndFeel_V3 and I want to redraw the slider background dynamically (redraw the background or foreground slider too if needed). The slider is read only to simplify the requirements.

How would I do this? Is instantiating a laf object and calling laf.drawLinearSliderBackground possible? I know this might be computationally expensive to redraw the background of the slider, but my update will be minimal and this is an experiment at designing dynamic GUIs. Any ideas?

2

just call it’s repaint() function. This will cause the component to have it’s paint() function called (async from your call to repaint()).

3

I’m sorry, I didn’t quite get this.

Do you mean calling the slider’s repaint() function would call the drawLinearSlider which in turns calls drawLinearSliderBackground?

I would also like to access some data while redrawing the background. So i was hoping to
laf.setData(4); slider.repaint();
Then access the data in laf.drawLinearSliderBackground()

4

I do not fully understand all the other trickery you want to do, but if you want to repaint the background of your slider, yes, called mySlider.repaint()…

5

The LookAndFeel is shared by all your Components (or at least many Components, you can have multiple LookAndFeels). So the LnF should be stateless. It only defines behaviour, not a state of a specific slider.

However you can use the getProperties() NamedValueSet, that every Component has, and in your LnF implementation you get a reference to the coponent that is calling your drawSliderBackground or whatever, it can access these properties.