How to set the default ColorPicker type when opening the dropdown?

[vmWarp15]

Hello, I've been exploring the Avalonia ColorPicker and ran into some issues with disabling the ColorSpectrum.

How do I make the ColorPicker default to the ColorPalette tab instead of the ColorSpectrum tab when IsColorSpectrumVisible is False? Currently when I set IsColorSpectrumVisible="False", the spectrum tab still shows up first when I open the picker. I want the ColorPalette tab to be selected by default instead.

I want to use both the ColorPalette and ColorComponents within the ColorPicker, so that is why I'm not using the individual specifically.

[TruePadawan]

I would also like an answer to this

[robloo]

See the conversations in:

• ColorPicker shows spectrum tab even when disabled and SelectedIndex doesn't work #10198
• Fix the issue that setting SelectedIndex before color picker initialize will not retain the selection #19663

[timunie]

Iirc ColorPicker has SelectedIndex property where this can be set.

https://api-docs.avaloniaui.net/docs/P_Avalonia_Controls_ColorView_SelectedIndex

[TruePadawan]

It's still buggy, It still shows the color spectrum initially. I gave up and will create a simple color palette component to suit my needs

[robloo]

It's a lifecycle issue with Avalonia itself I don't know how to fix without some ugly hacks.

See: #19663 (comment)

[TruePadawan]

Thanks, hacky indeed.
Fortunately I could make do with something much simpler

[timunie]

@robloo probably on this line we should try to also bind IsEnabled:

Avalonia/src/Avalonia.Controls.ColorPicker/Themes/Fluent/ColorPicker.xaml

Lines 102 to 104 in 1c0efbd

	<!-- Spectrum Tab -->
	<TabItem Theme="{StaticResource ColorViewTabItemTheme}"
	IsVisible="{TemplateBinding IsColorSpectrumVisible}">

[robloo]

That's an interesting idea that might be worth a try. I'll take a look later. The assumption being TabControl itself will validate the tabs properly and never show tabs that aren't enabled.

Of course this is all still a work-around for the late binding evaluation.

[timunie]

doesn't work :-( I just tried it.

We need to add a failing test for it and then try to solve the underlying issue. It's not high on priority, but that is what we need to do at some point.