public static void UpdateBrush(UIElement uiElement)
{
RevealBrushState revealBrushState = RevealBrushHelper.GetState(uiElement);
RevealBrushMode revealBrushMode = RevealBrushHelper.GetRevealBrushMode(uiElement);
if (RevealBrushHelper.GetRevealBrush(uiElement) is RadialGradientBrush brush)
{
if (revealBrushMode == RevealBrushMode.Background)
{
brush.Opacity = (revealBrushState != RevealBrushState.Normal) ? 0.1 : 0.0;
}
else if (revealBrushMode == RevealBrushMode.BackgroundPressed)
{
if (revealBrushState == RevealBrushState.Pressed)
{
var time = TimeSpan.FromMilliseconds(1500);
var easingFunction = new CubicEase()
{
EasingMode = EasingMode.EaseOut
};
var opacityAnimation = new DoubleAnimation(1.0, 0.0, time)
{
EasingFunction = easingFunction
};
brush.BeginAnimation(Brush.OpacityProperty, opacityAnimation);
var radiusAnimation = new DoubleAnimation(50.0, 200.0, time)
{
EasingFunction = easingFunction
};
brush.BeginAnimation(RadialGradientBrush.RadiusXProperty, radiusAnimation);
brush.BeginAnimation(RadialGradientBrush.RadiusYProperty, radiusAnimation);
var gradientStop = brush.GradientStops[1];
var offsetAnimation = new DoubleAnimation(0, 0.8, time)
{
EasingFunction = easingFunction
};
gradientStop.BeginAnimation(GradientStop.OffsetProperty, offsetAnimation);
}
else
{
var time = TimeSpan.FromMilliseconds(200);
var easingFunction = new CubicEase()
{
EasingMode = EasingMode.EaseOut
};
var opacityAnimation = new DoubleAnimation(0.0, time)
{
EasingFunction = easingFunction
};
brush.BeginAnimation(Brush.OpacityProperty, opacityAnimation);
var radiusAnimation = new DoubleAnimation(200.0, time)
{
EasingFunction = easingFunction
};
brush.BeginAnimation(RadialGradientBrush.RadiusXProperty, radiusAnimation);
brush.BeginAnimation(RadialGradientBrush.RadiusYProperty, radiusAnimation);
}
}
}
}
public static void SetRevealBrushMode(DependencyObject obj, RevealBrushMode value)
{
obj.SetValue(RevealBrushModeProperty, value);
}