Hello, for those who want to save time, here's a simple script for a horizontal slider in Look and Feel, as I didn't find one in the forum. It's up to you to customize this script and assign your own colors.
//horizontal slider
laf.registerFunction("drawLinearSlider", function(g, obj)
{
var a = obj.area;
g.setColour(Colours.blue);
g.fillRoundedRectangle([0, 10, a[2], 12], 6);
var x = obj.valueNormalized * a[2];
g.setColour(Colours.red);
g.fillRoundedRectangle([0, 10, x , 12], 6);
g.setColour(Colours.green);
g.fillRoundedRectangle([x - 6 , 0, 12, 30], 6);
});
//vertical slider
laf.registerFunction("drawLinearSlider", function(g, obj)
{
var a = obj.area;
g.setColour(Colours.blue);
g.fillRoundedRectangle([9, 0, 12, a[3]], 6);
var x = obj.valueNormalized * a[3];
g.setColour(Colours.red);
g.fillRoundedRectangle([9, 0, 12 , x], 6);
g.setColour(Colours.green);
g.fillRoundedRectangle([0 , x - 6, 30, 12], 6);
});