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Published 20 hours ago • verified publisher icon simonkrauter

Changing Colour of Button results in `cannot dispatch; dispatcher is nil`

Open theAkito opened this issue 3 years ago • 3 comments 

  button_switchMode.onClick = proc(event: ClickEvent) = bMode = if bMode == ENCODE:
      button_switchMode.canvas.areaColor = rgb(255, 0, 0)
      button_switchMode.text = $DECODE
      DECODE
    else:
      button_switchMode.canvas.areaColor = rgb(0, 255, 0)
      button_switchMode.text = $ENCODE
      ENCODE

When this onClick event gets triggered, my app is getting the following error.

Error: unhandled exception: cannot dispatch; dispatcher is nil

When trying to research this issue, there were hints pointing at it being a problem with incorrect method implementations or at least related to objects.

theAkito avatar Jul 31 '22 23:07 theAkito

Currently buttons don't support a custom background color or custom drawing through a canvas. As far as I know there is no easy way to implement this.

simonkrauter avatar Aug 01 '22 19:08 simonkrauter

Currently buttons don't support a custom background color or custom drawing through a canvas. As far as I know there is no easy way to implement this.

What about this?

https://github.com/simonkrauter/NiGui/blob/03f7db26317fdc84a0f7b2ff92d7d8a50cb045a2/examples/example_30_custom_button.nim#L12

theAkito avatar Aug 01 '22 19:08 theAkito

Oh right. What I said above only applies for a native button. You can use your own button based on the type Button. Then your code is responsible for drawing the widget.

simonkrauter avatar Aug 01 '22 22:08 simonkrauter