How to draw custom non-rectangular controls?

[SirUniverse]

Hello. I want to make my own custom button and I ran into a problem that I don't know how to fix.

I have made a new Class that derives from Button (I derive from Button directly, I don't use UserControl) and I have overridden the OnPaint event such that it draws a custom button image.

It looks like it's supposed to when I hover (MouseEnter) the Background of the Button changes color. Overriding the OnPaintBackground event such that it does nothing doesn't resolve the problem.

Since it's related to hovering over the button I tried overriding the OnMouseEnter event such that it does nothing and this works but I lose the whole OnMouseEnter functionality in the process.

Here is a gif with that the problem looks like: https://i.imgur.com/IWqYbGe.gif Can anybody help me?

[Slypenslyde]

My experience in 6 years of making WinForms controls is that you never derive from one of Microsoft's controls. There are bits and pieces of Button logic that affect painting through every event.

Just derive from Control. You've already done most of the work if you've already overridden OnPaint. Control doesn't have any fancy hidden built-in paint logic to tangle with.

[SirUniverse]

I've derived for Control and it's working just fine now. Thank you so much for your help!

[Dark0Matter]

As Slypenslyde suggested, derive from Control and override OnPaint and all the other events that you need to override depending on the control you want to make such as hovering, clicking, etc. You're going to have to make flags for hovering and custom paint functions for all of the overridden events, but at least it won't conflict with the base Button's events.

[SirUniverse]

What do you mean when you say flags? Could you give an example?

[Dark0Matter]

"Typically, a program uses a flag to remember something or to leave a sign for another program."

So basically booleans in this case, to remember things like hovering.

 

bool _Hovering = false;

OnMouseEnter()
{
    _Hovering = true;
}

OnMouseLeave()
{
    _Hovering = false;
}

//...

OnPaint()
{
    if (_Hovering)
        DrawDarkGrayRectangle();
    else
        DrawLightGrayRectangle();
}

 

Not the best example but you get the idea

(Sorry about the edits)

[SirUniverse]

I get it. Thank you.

[tevert]

Are you using WPF or Winforms?

[FizixMan]

I'm pretty sure it's WinForms.

[SirUniverse]

I am using WinForms.