namespace Yw.WpfUI.Hydro
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{
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/// <summary>
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/// 抽象高亮辅助类
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/// </summary>
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internal class LogicalHighlightHelper
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{
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/// <summary>
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///
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/// </summary>
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public LogicalHighlightHelper(HelixViewport3D viewport)
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{
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_viewport = viewport;
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}
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/// <summary>
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/// 状态改变事件
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/// </summary>
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public event Action<LogicalVisual3D, bool> StateChangedEvent;
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private readonly HelixViewport3D _viewport = null;//三维组件
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private LogicalVisual3D _logicalVisual;//当前高亮的Visual
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/// <summary>
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/// 高亮
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/// </summary>
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public void Highlight(Point pt)
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{
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var logicalVisual = _viewport.FindNearestVisual(pt) as LogicalVisual3D;
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if (logicalVisual == null)
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{
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Reset();
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return;
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}
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if (_logicalVisual == logicalVisual)
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{
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return;
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}
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Reset();
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_logicalVisual = logicalVisual;
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this.StateChangedEvent?.Invoke(_logicalVisual, true);
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}
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//重置
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private void Reset()
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{
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if (_logicalVisual != null)
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{
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this.StateChangedEvent?.Invoke(_logicalVisual, false);
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_logicalVisual = null;
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}
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}
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}
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}
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