Setting the alpha of a color individually?

[d.healey]

@CatABC

You need to "reset" your keyboard before assigning the new colours. You can do that like this

for (i = 0; i < 128; i++)
    Engine.setKeyColour(i, 0x0);

[CatABC]

@d-healey
This doesn't seem to work, am I doing something wrong?

if (value == 2){
    for (i = 0; i < 128; i++)
          {
    		Engine.setKeyColour(i, 0x0);
    	   }

     local Ens2 = [36, 38, 40, 43, 48, 50, 52, 55, 60, 62, 64, 67, 84];		   	
           for (i = 0; i < Ens2.length; i++)
        	{
        		Engine.setKeyColour(Ens2[i], Colours.withAlpha(Colours.blue, 0.3));
        	};
         }

[d.healey]

@CatABC You don't need to put the reset within the if statement, it can go before all of your keyboard colouring code.

[CatABC]

@d-healey Unfortunately, he still has the same result. My guess is that because I used a button to trigger the color change, when the button value does not change, it will continue to keep the button callback result.
What should I write in the else of the button to make it return to the color before it changed?

[d.healey]

@CatABC can you make a minimal snippet that shows the problem?

[CatABC]

@d-healey ChangeColor.zip
The code snippet didn't seem to show the problem, so I uploaded a project, and along the way I found the source of the problem. When the button is in a Panel, it causes the problem.

[CatABC]

@d-healey There is no problem switching with Combobox, but there is a problem with switching with preset browsers

[d.healey]

@CatABC This is what I see in your project, looks like it's working?

[CatABC]

@d-healey Oh, sorry, I forgot to save the latest data when I was testing the code snippet,
ChangeColor2.zip

[d.healey]

@CatABC Turn off saveInPreset for your button.

[CatABC]

@d-healey Ahaha,god，It's so simple
Feeling mine so stupid。，Thanks very much David, you solved my problem again.