Materialdesigninxamltoolkit: ComboBox background color should allow transparent

Created on 5 May 2016 · 10Comments · Source: MaterialDesignInXAML/MaterialDesignInXamlToolkit

The new version of Material Design XAML Toolkit applies a background color to the ComboBox control which can be an issue when displayed in a ListView which has alternating row colors:

It would be great to have a way to toggle the background to transparent on ComboBoxes, so the background color is not applied. Thanks.

Source

arc95

Most helpful comment

@ButchersBoy i think so.
I suppose i will do a PR in a few days. Sorry, i had a vacation (spent in Czech).

l1pton17 on 1 Jun 2016

👍3

All 10 comments

@arc95 you can set ComboBox's Background property

l1pton17 on 5 May 2016

@l1pton17 That's not going to address it, as I just tried it. I only want the box to be transparent when it's closed. This makes it transparent also when the user clicks to open it, letting the background bleed through all the items.

arc95 on 5 May 2016

@arc95 sorry, made a mistake. You have to manually set background color of comobobox according to panel background.

l1pton17 on 5 May 2016

@l1pton17 How do you do that in a ListView with alternating row color and keep the color from also affecting all the items in the dropdown?

arc95 on 5 May 2016

@arc95 With RelativeSource ComboBox Background="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListViewItem}}, Path=Background}"

l1pton17 on 5 May 2016

😄1 👍1

@arc95 but i agree with you, transparent mode need a fix :smile:

l1pton17 on 5 May 2016

👍1

Thanks, @l1pton17. If I knew more about WPF, I would implement what you're suggesting. For now, I'll wait for a fix from the experts :smile:

arc95 on 5 May 2016

What's status on this? Do we still have an issue?

ButchersBoy on 29 May 2016

@ButchersBoy i think so.
I suppose i will do a PR in a few days. Sorry, i had a vacation (spent in Czech).

l1pton17 on 1 Jun 2016

👍3

@ButchersBoy i think so.
I suppose i will do a PR in a few days. Sorry, i had a vacation (spent in Czech).

So with this PR the popup background in the original example of this issue is sometimes white and sometimes blue? I don't think that this is exactly what we always want. I don't see even a way to override this "auto" background.