Style question: Gradient

[AbbyIOM]

My Issue/Question:

Is it possible in current ImGui version to achieve some good looking glow around widgets?
Maybe a two color gradient, but what about circles? and is gradient from the center even possible?

[AbbyIOM]

Also, i've got another question, if i want to modify a widget and i want to animate the widget like opacitiy fade or changing the position once clicked, how am i supposed to do that? If i change the opacity or the position of the rectangle all widgets will get affected after i press one. I've been trying to recreate the windows 10 checkbox (the moving circle from left to right) but after i move the circle on pressed all checkboxes will move too.

[MartinBspheroid]

You might want to check out #1537 for the checkbox.
For glow... I'm not entirely sure I'm one who could help out with this one.

[rokups]

It is possible to customize rendering by setting ImDrawCmd::UserCallback/ImDrawCmd::UserCallbackData. This function is called by the backend and you can handle rendering any way you want. In this case you probably want to create a custom shader that implements glow and apply it to rendered geometry.

[ocornut]

A gradient can be created using AddRectFilledMultiColor() or reworking it into a custom version that takes 4 different points. There's no AddQuadFilledMultiColor() because not-axis aligned would require anti-aliasing edge (possible to add but generally once you are creating those graphics shapes manually you can use low-level function).

Your questions are generally a bit too vague and open-ended while also suggesting unfamiliarity with some concepts so it's going to be not easy to lay out simple answers. Everything is possible is to put the work to it.

[AbbyIOM]

So like, what would you recommend to do to make something that looks like glow/shadow, or possibly the easiest way to achieve that.

[ocornut]

There's on "easy" way to achieve that. You have all cards in hands to draw custom elements.

There's a features/shadow branch (#1329) which has some fancy primitives.
I think we went overboard with the polygon clipping and going to strip some features out for simplicity before this has a chance to settle. It's also reliant on texture update (#3761) being finished otherwise hard to configure.

[AbbyIOM]

That's actually absolutely perfect!

Thanks and enjoy the rest of the day.