Combined Slider Knob

Question

Is it possible to construct a slider knob, which is built from an image (the white circle = border of the knob) and an alpha channel, which is located on top of the image, which can change it's color?

Answer 1

Hello,

nice idea, to construct such a color control...

In this case it is necessary to use two separate bitmaps: One bitmap for the white background of the knob and one alpha-only bitmap that is colorized dynamically for the colored foreground of the knob.

When the position of the thumb has changed, you have to move two image views now instead of one.

Best regards,

Manfred.