Now I would like to have an “fill/paint bucket” effect like in photoshop. The background inside the shape is white (for example) and by clicking inside the shape I want to change the color to red or green.
I too am looking for a method by which I could make a fill effect. Good to see that you are intending for a fill paint bucket effect similar to that in Adobe Photoshop. Anyway, I will try and see if I come up with anything regarding Fill effect and update here.