Mahapps.metro: Weird animation on combobox with only one item

[muriloebsantos]

What steps will reproduce this issue?

Load a combox with only one item
Click on the combox to show the items

Expected outcome

It will open the combobox with one animation that will increase the text legiblity. When it just opens it's difficult to read the content, it seems like I'm not wearing my glasses.

http://stackoverflow.com/questions/40262033/remove-combobox-animation-on-mahapps

I would like to know how to remove this animation.

Environment

• MahApps.Metro 1.3.0
• Windows 8.1
• Visual Studio 2015
• .NET Framework 4.5

[punker76]

@muriloebsantos This is a known problem of WPF itself https://blogs.msdn.microsoft.com/text/2010/01/14/cleartypehint/ or http://stackoverflow.com/a/508596/920384
I will look and add this to MahApps as possible as soon for 1.4.0.

[punker76]

@muriloebsantos Please try 1.4.0-ALPHA026 for this issue. You must set RenderOptions.ClearTypeHint="Enabled" for the ComboBox to enable this for the scrollviewer content presenter. Please let me know if this works. Thx.

[muriloebsantos]

Unfortunately it didn't work. I updated the package and I set RenderOptions.ClearTypeHint="Enabled"

[punker76]

@muriloebsantos The ClearType or the animation? The animation is not affected by this

[muriloebsantos]

Sorry, the animation.

[punker76]

@muriloebsantos Animation is controlled by SystemParameters.ComboBoxPopupAnimationKey

[muriloebsantos]

You gave me keyword I needed! Then I search on stackoverflow and found the solution: http://stackoverflow.com/a/25502880/3517029

 <Controls:MetroWindow.Resources>
        <PopupAnimation x:Key="{x:Static SystemParameters.ComboBoxPopupAnimationKey}">None</PopupAnimation>
    </Controls:MetroWindow.Resources>