CODEWITHSUNDEEP
wpfanimationcomboboxdrop-down-menu
marc40000
marc40000

Reputation: 3197

How do I disable the opening and closing animation of the DropDown of a ComboBox in WPF?

When I put a combobox in my WPF app, at runtime, when I click it, it rolls down the included items. After selection, it rolls the DropDown up again.

Is it possible to prevent the rolling animation from happening? Instead I'ld like to just have it open and closed immediately.

- Marc

Upvotes: 2

Views: 3243

Answers (2)

Martin Clarke
Martin Clarke

Reputation: 5657

You can also create a custom ComboBox ala this answer; so you'd end up with something like this.

class ComboBoxNoAnimation : ComboBox
{
    public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();

        var popup = (Popup)Template.FindName("PART_Popup", this);            
        popup.PopupAnimation = PopupAnimation.None;
    }
}

Upvotes: 1

dustyburwell
dustyburwell

Reputation: 5813

I don't think it's possible to simply disable the animation on the ComboBox as it stands. However, I believe the default ControlTemplate for the ComboBox implements the dropdown portion as a Popup. I'm guessing that it's using the Slide PopupAnimation setting. If you're up for it, you can replace the ControlTemplate for the ComboBox and set the PopupAnimation on that Popup to None or whatever setting you'd like.

Here's an example ComboBox ControlTemplate thanks to Microsoft.

Let me know if you need further assistance.

-- HTH, Dusty

Upvotes: 2

Related Questions