Starting animation when changing dependency properties

Question

I created a UserControl with two dependency properties: value and color. The color of the UserControl depends on the Value property. For example, if Value = 0 Color = Blue, Value = 0.5 Color = Red, etc. This I achieved using a custom converter associated with the Fill property, for example:

<Ellipse Name="dotForeground" Stroke="Transparent" StrokeThickness="1" Fill="{Binding ElementName=control1, Converter={StaticResource colorConverter}, Path=Value}"/>

Now I need that when changing the Value value, for example, from 0.0 to 0.5, which also changes the Color property, I would like to create a ColorAnimation so that it disappears from the previous color to the new color.

I would appreciate any help with this.

Answer 1

: Color :

<Ellipse Name="dotForeground" Stroke="Transparent" StrokeThickness="1">
    <Ellipse.Background>
         <SolidColorBrush Color="{Binding Color, ElementName=control1}" />
    </Ellipse.Background>
</Ellipse>

ColorAnimation UserControl, .

public Color Color
{
    get { return (Color)GetValue(ColorProperty); }
    set { SetValue(ColorProperty, value); }
}

public static readonly DependencyProperty ColorProperty = DependencyProperty.Register("Color", typeof(Color), typeof(MyUserControl), new UIPropertyMetadata(Colors.Red));

public double Value
{
    get { return (double)GetValue(ValueProperty); }
    set { SetValue(ValueProperty, value); }
}

public static readonly DependencyProperty ValueProperty = DependencyProperty.Register("Value", typeof(double), typeof(MyUserControl), new UIPropertyMetadata(0.0,ValueChanged));

private static void ValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
    var control = (MyUserControl)sender;

    var anim = new ColorAnimation { To = Color.FromRgb((byte)control.Value, 128, 60), FillBehavior = FillBehavior.HoldEnd};
    control.BeginAnimation(MyUserControl.ColorProperty, anim);
}