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Merge pull request #331 from AvaloniaCommunity/b/borderTransitionsBug
Add mixin for BoxShadow instead of just Border style. #330
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Material.Styles/Assists/Mixins/MaterialBorderBoxShadowMixin.cs
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using System; | ||
using Avalonia; | ||
using Avalonia.Animation; | ||
using Avalonia.Controls; | ||
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namespace Material.Styles.Assists.Mixins; | ||
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/// <summary> | ||
/// Adds BoxShadows transitions for any control, which has enabled animations. | ||
/// </summary> | ||
public static class MaterialBorderBoxShadowMixin { | ||
public static BoxShadowsTransition TargetTransition { get; set; } = new() { Property = Border.BoxShadowProperty, Duration = TimeSpan.FromMilliseconds(350) }; | ||
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/// <summary> | ||
/// Initializes BoxShadows transitions for specified control. | ||
/// </summary> | ||
/// <typeparam name="TControl">The control type.</typeparam> | ||
public static void Attach<TControl>() where TControl : Control { | ||
TransitionAssist.DisableTransitionsProperty.Changed.AddClassHandler<TControl>(OnDisableTransitionsChanged); | ||
Animatable.TransitionsProperty.Changed.AddClassHandler<TControl>(OnTransitionCollectionChanged); | ||
} | ||
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private static void OnDisableTransitionsChanged<TControl>(TControl control, AvaloniaPropertyChangedEventArgs args) | ||
where TControl : Control { | ||
var transitions = control.GetValue(Animatable.TransitionsProperty); | ||
if (transitions is null) return; | ||
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var disableTransitions = args.GetNewValue<bool>(); | ||
if (disableTransitions) | ||
transitions.Remove(TargetTransition); | ||
else | ||
transitions.Add(TargetTransition); | ||
} | ||
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private static void OnTransitionCollectionChanged<TControl>(TControl control, AvaloniaPropertyChangedEventArgs args) | ||
where TControl : Control { | ||
var disableTransitions = (bool)control.GetValue(TransitionAssist.DisableTransitionsProperty)!; | ||
if (disableTransitions) return; | ||
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if (args.NewValue is Transitions transitions && !transitions.Contains(TargetTransition)) transitions.Add(TargetTransition); | ||
} | ||
} |
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