130 lines
4.2 KiB
C#
130 lines
4.2 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Text;
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using System.Linq;
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using CPF.Drawing;
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using System.ComponentModel;
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namespace CPF
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{
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/// <summary>
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/// 表示一个可视化元素，提供呈现支持，包括命中测试，坐标变换
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/// </summary>
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public class Visual : CpfObject
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{
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//#region 注册属性和设置默认值
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//public readonly static Type VisualType = typeof(Visual);
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//public static readonly DependencyProperty VisualOffsetProperty = new DependencyProperty("VisualOffset", PointType, VisualType, new Point());
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//public static readonly DependencyProperty VisualTransformProperty = new DependencyProperty("VisualTransform", TransformType, VisualType, Transform.Identity);
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//public static readonly DependencyProperty VisualClipProperty = new DependencyProperty("VisualClip", GeometryType, VisualType, null);
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//public static readonly DependencyProperty CacheModeProperty = new DependencyProperty("CacheMode", CacheModeType, VisualType, CacheMode.Auto);
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//public static readonly DependencyProperty ClipToBoundsProperty = new DependencyProperty("ClipToBounds", BoolType, VisualType, false);
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//#endregion
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/// <summary>
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/// 可视化对象位置偏移
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/// </summary>
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//[PropertyMetadata(typeof(Point), "0,0")]
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[NotCpfProperty]
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protected virtual Point VisualOffset
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{
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get;
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set;
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}
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/// <summary>
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/// 可视化对象变换
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/// </summary>
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//[PropertyMetadata(typeof(Transform), "Identity")]
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[NotCpfProperty]
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protected virtual Transform VisualTransform
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{
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get;
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set;
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} = Transform.Identity;
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/// <summary>
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/// 可视对象的剪辑区域
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/// </summary>
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[UIPropertyMetadata(null, UIPropertyOptions.AffectsRender)]
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protected virtual Geometry VisualClip
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{
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get { return (Geometry)GetValue(3); }
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set { SetValue(value,3); }
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}
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///// <summary>
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///// 图像缓存模式
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///// </summary>
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//[PropertyMetadata(CacheMode.Auto)]
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//public CacheMode CacheMode
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//{
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// get { return (CacheMode)GetValue(); }
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// set { SetValue(value); }
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//}
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/// <summary>
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/// 获取或设置一个值，该值指示是否剪切此元素的内容(或来自此元素的子元素的内容)使其适合包含元素的大小。这是一个依赖项属性。
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/// </summary>
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[Description("获取或设置一个值，该值指示是否剪切此元素的内容(或来自此元素的子元素的内容)使其适合包含元素的大小。这是一个依赖项属性。")]
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[UIPropertyMetadata(false, UIPropertyOptions.AffectsRender)]
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public bool ClipToBounds
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{
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get { return (bool)GetValue(2); }
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set { SetValue(value,2); }
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}
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public virtual void Render(DrawingContext dc)
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{
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OnRender(dc);
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}
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protected virtual void OnRender(DrawingContext dc)
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{
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}
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/// <summary>
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/// 确定点是否在可视对象的内部，point需要包含偏移
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/// </summary>
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/// <param name="point"></param>
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/// <returns></returns>
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public virtual bool HitTestCore(Point point)
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{
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if (VisualClip == null)
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{
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return GetContentBounds().Contains(point);
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}
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else
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{
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Point offset = VisualOffset;
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point.Offset(-offset.X, -offset.Y);
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return VisualClip.Contains(point);
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}
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}
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/// <summary>
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/// 获取内容边界,包含偏移，子类必须重写。不受变换影响
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/// </summary>
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/// <returns></returns>
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public virtual Rect GetContentBounds()
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{
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return Rect.Empty;
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}
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//public Rect VisualContentBounds
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//{
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// get
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// {
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// return GetContentBounds();
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// }
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//}
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public virtual Point PointToScreen(Point point)
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{
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return point;
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}
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}
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}
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