CODEWITHSUNDEEP
c#wpfxaml
Chris H.
Chris H.

Reputation: 2594

Overriding just the thumb style on a Slider element

Is there a simple way to override the appearance of the Thumb on a Slider element without defining a whole custom Slider style? I want to use the default Slider, but just change the shape of the thumb to a circle. The questions I've seen so far tend to recommend defining a whole custom Slider element, but what I'm looking for is a way to override just the thumb without touching the other parts of the style - it seems like there should be some way to do this in a very small number of lines in the xaml file.

Upvotes: 0

Views: 422

Answers (1)

SledgeHammer
SledgeHammer

Reputation: 7690

Yes. There is. With a little hack. After the style is applied (in OnApplyTemplate() for example), you can do a FindName, ie:

Thumb thumb = Template.FindName("Thumb", this) as Thumb;

then replace the control template:

thumb.Template = ...;

You can't just put a style in your resource section that targets Thumbs because the default style gets overridden in the Slider style, but this is a nice work-around so you don't need to redefine the whole style. You can also put some logic in your thumb.Template line to pick a different template if you're vertical or horizontal or on the OS, etc.

Upvotes: 1

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