uiImageButton alpha chanel color buildup if zoom is not 1.0

[damien]

Hi,
I am working on a panel for the Ensoniq DP4 and I experienced a GUI bug with uiImagebuttons in PNG with transparency.
If the zoom value is set to 1.0 everything is fine.
If the zoom is different than 1.0 smaller or bigger, everytime you press an element the images colors builds up like if hundreds of the same image were overlaying each other. (always on the right side)

please find attached the video of the bug:
At the beginning the zoom ratio is set to 1 everything is fine, then I zoom out and the colors above alpha channels start to buid up on clicks.

Is it something known? Is there a way to avoid that?
I use macos mojave 10.14.6 and Ctrlr 5.3.198

thanks 😉

• This topic was modified 3 years, 12 months ago by damien. Reason: typo

[dnaldoog]

You could try

panel:getCanvas():repaint() in a lua function attached to the button. Might be a bit expensive resource wise on a uiSlider etc though.

The graphics design is exceptional. Very nice.

:)

[damien]

Hi, thanks a lot! yes it’s going to be very realistic with all the features implemented (algo selection and tweaking, routing etc for every unit like a VST controlled external DSP.

Well, I tried the repaint function in all my buttons methods when value changes but it doesn’t work, I still have the same issue with colors building up. It’s like if the refresh function is not happening.

I tried to repaint only the modulator and I get an error :

Error : Attempt to call method “repaint” (a nil value)

this is the script “ModeTabsSelect” linked to the Select button as an exemple :

ModeTabsSelect = function(mod, value)
	panel:getComponent("ModeTabs"):setProperty ("uiTabsCurrentTab", 0, false)

	panel:getModulatorByName("ViButComSelect"):repaint()
end

It should select a new tab and refresh the button but no it does not work.

Can you please help with that, I am getting mad at it 🙂

thanks a lot

[dnaldoog]

Well it was a long shot.

I wasn’t confident it would work.

I suppose it’s admitting defeat, but with the black background you wouldn’t need a transparent png, right?

Another idea could be to use a transparent gif (may not look so good though) : I think it’s possible to use svg as well.

[damien]

Worst case scenario I’ll export the sprites again with the color tone of the background behind the light glow and the button shadows. It will probably do the trick.
I’ll let you know
thanks

[Author]

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