C#•16mo ago

❔ wpf styling/templating with custom dependency properties?

is there a way to use custom dependency properties with styles and templates? for example if I want a property, MiddleColour, on a template for a slider, that changes the background colour of the middle bit of the slider and I want to be able to change that colour using a style. Is that possible? Continuing on, would it also be possible to pass a property to the style, eg GradientColour, which is then used and passed to the MiddleColour in the template? Thanks

6 Replies

JakenVeina•16mo ago

you can customize the visuals of a control by providing it a custom ControlTemplate and in theory, I think you could define your MiddleColour property as an attached property, and be able to bind to that from within the template not entirely sure what you're asking with the second question

lucyOP•16mo ago

tyty with the second question, so the MiddleColour is a brush, but i'd like a style that gives it a gradient brush that goes from #000000 to a given colour GradientColour

JakenVeina•16mo ago

well, that is a thing you can do with brushes

lucyOP•16mo ago

yes, but i'm asking specifically is there a way to get it so you have the compnent, give it a style, give it a GradientColour, and the style handles translating GradientColour into a gradient brush rather than having to pass in a unique brush for each colour you want to use as a gradient for example

<Slider Style="{StaticResource ColourSliderStyle}" GradientColour="#ff0000"/>

<!--in the resources file-->

<Style x:Key=ColourSliderStyle TargetType="x:Type Slider">
  <Setter Property="MiddleColour">
    <Setter.Value>
      <GradientBrush>
        <GradientStop Color="#000000" Offset="0"/>
        <GradientStop Color="{[passed GradientColour]}" Offset="1"/>
      </GradientBrush>
    </Setter.Value>
  </Setter>
</Style>

<Slider Style="{StaticResource ColourSliderStyle}" GradientColour="#ff0000"/>

<!--in the resources file-->

<Style x:Key=ColourSliderStyle TargetType="x:Type Slider">
  <Setter Property="MiddleColour">
    <Setter.Value>
      <GradientBrush>
        <GradientStop Color="#000000" Offset="0"/>
        <GradientStop Color="{[passed GradientColour]}" Offset="1"/>
      </GradientBrush>
    </Setter.Value>
  </Setter>
</Style>

JakenVeina•16mo ago

yeah, that should be doable, assuming what I said earlier is doable with passed being an attached property and with that being inside a ControlTemplate you'd have that be a TemplateBinding IIRC

Accord•16mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ wpf styling/templating with custom dependency properties?