94 lines
3.3 KiB
C#
94 lines
3.3 KiB
C#
using AntdWpf.Controls;
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namespace AntdWpf.Utils
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{
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using System;
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using System.Linq;
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using System.Windows;
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using System.Windows.Media;
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using System.Windows.Media.Animation;
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/// <summary>
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/// Provides the ability to spin for controls.
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/// Known defects:
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/// Using trigger to change control RenderTransform property will result in animation lose.
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/// Try adding the Spin property Setter after the RenderTransform property Setter for notification purposes.
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/// Example: Theme/Switch.xaml
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/// </summary>
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public static class Spinner
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{
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private const string storyBoardName = "AntdWpf.SpinnerStoryBoard";
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/// <summary>
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/// Start the spinning animation.
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/// </summary>
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public static void BeginSpin<T>(this T control, double seconds) where T : FrameworkElement, ISpinable
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{
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var transform = control.RenderTransform;
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control.SetCurrentValue(UIElement.RenderTransformOriginProperty, new Point(0.5, 0.5));
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TransformGroup transformGroup;
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if (transform is TransformGroup)
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{
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if (!(((TransformGroup)transform).Children.FirstOrDefault() is RotateTransform))
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{
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transformGroup = (TransformGroup)transform.Clone();
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transformGroup.Children.Insert(0, new RotateTransform(0.0));
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control.SetCurrentValue(UIElement.RenderTransformProperty, transformGroup);
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}
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}
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else
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{
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transformGroup = new TransformGroup();
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if (transform is RotateTransform)
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{
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transformGroup.Children.Add(transform);
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}
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else
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{
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transformGroup.Children.Add(new RotateTransform(0.0));
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if (transform != null && transform != Transform.Identity)
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{
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transformGroup.Children.Add(transform);
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}
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}
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control.SetCurrentValue(UIElement.RenderTransformProperty, transformGroup);
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}
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if (!(control.Resources[storyBoardName] is Storyboard storyboard))
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{
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storyboard = new Storyboard();
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var animation = new DoubleAnimation
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{
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From = 0,
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To = 360,
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AutoReverse = false,
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Duration = TimeSpan.FromSeconds(seconds),
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RepeatBehavior = RepeatBehavior.Forever
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};
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Storyboard.SetTarget(animation, control);
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Storyboard.SetTargetProperty(animation,
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new PropertyPath("(0).(1)[0].(2)", UIElement.RenderTransformProperty,
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TransformGroup.ChildrenProperty, RotateTransform.AngleProperty));
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storyboard.Children.Add(animation);
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control.Resources.Add(storyBoardName, storyboard);
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}
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storyboard.Begin();
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}
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/// <summary>
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/// Stop the spinning animation.
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/// </summary>
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public static void StopSpin<T>(this T control) where T : FrameworkElement, ISpinable
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{
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(control.Resources[storyBoardName] as Storyboard)?.Stop();
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}
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}
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}
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