86 lines
2.5 KiB
C#
86 lines
2.5 KiB
C#
namespace Melskin.Controls;
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using System.Windows;
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/// <summary>
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/// A spinner for displaying loading state of a page or a section.
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/// </summary>
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[TemplateVisualState(Name = "Spun", GroupName = "SpinStates")]
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[TemplateVisualState(Name = "Unspun", GroupName = "SpinStates")]
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public class Spin : ContentControl
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{
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#region Properties
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/// <summary>
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/// 获取或设置指示器属性的依赖属性。此属性用于定义旋转控件中使用的指示器元素。
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/// </summary>
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public static readonly DependencyProperty IndicatorProperty =
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DependencyProperty.Register(
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nameof(Indicator),
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typeof(UIElement),
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typeof(Spin),
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new PropertyMetadata(null, OnSpinningChanged));
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/// <summary>
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/// 获取或设置指示器元素。
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/// </summary>
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public UIElement Indicator
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{
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get => (UIElement)GetValue(IndicatorProperty);
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set => SetValue(IndicatorProperty, value);
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}
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/// <summary>
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/// 获取或设置一个布尔值，指示旋转控件是否处于旋转状态。
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/// </summary>
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public static readonly DependencyProperty SpinningProperty =
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DependencyProperty.Register(
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nameof(Spinning),
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typeof(bool),
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typeof(Spin),
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new PropertyMetadata(true, OnSpinningChanged));
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/// <summary>
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/// 获取或设置是否正在旋转。
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/// </summary>
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public bool Spinning { get => (bool)GetValue(SpinningProperty);
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set => SetValue(SpinningProperty, value);
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}
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private static void OnSpinningChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{ (d as Spin)?.GoToSpinState(); }
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private void GoToSpinState()
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{ VisualStateManager.GoToState(this, Spinning && null == Indicator ? "Spun" : "Unspun", true); }
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/// <summary>
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/// 获取或设置提示文本。
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/// </summary>
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public static readonly DependencyProperty TipProperty =
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DependencyProperty.Register(nameof(Tip), typeof(string), typeof(Spin), new PropertyMetadata(string.Empty));
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/// <summary>
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/// 获取或设置提示文本。
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/// </summary>
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public string Tip { get => (string)GetValue(TipProperty);
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set => SetValue(TipProperty, value);
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}
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#endregion
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#region Constructors
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static Spin()
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{ DefaultStyleKeyProperty.OverrideMetadata(typeof(Spin), new FrameworkPropertyMetadata(typeof(Spin))); }
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#endregion
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#region Overrides
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/// <inheritdoc />
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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GoToSpinState();
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}
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#endregion
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}
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