74 lines
2.7 KiB
C#
74 lines
2.7 KiB
C#
using Io.Github.Kerwinxu.LibShapes.Utils;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Linq;
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using System.Text;
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namespace Io.Github.Kerwinxu.LibShapes.Core.State
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{
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public class StateSelected:State
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{
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public StateSelected(UserControlCanvas canvas, PointF start_pointF) : base(canvas, start_pointF)
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{
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}
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public StateSelected(UserControlCanvas canvas) : base(canvas)
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{
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}
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public override void LeftMouseDown(PointF pointF)
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{
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// 首先判断一下是否在这个选择矩形的范围内
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// 在的话就是更改模式了，比如更改尺寸和移动。我这个在选择框上是更改尺寸，而在内部是移动
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// 如果不在，就转成待机模式
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// 1. 这里判断一下是否在矩形框的范围内
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GraphicsPath path = new GraphicsPath();
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// 这里要判断一下是否是ShapeMultiSelect
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if (this.canvas.SelectShape is Shape.ShapeMultiSelect)
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{
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// 那么最简单的方式是取消所有的选择，然后运行待机模式的选择
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this.canvas.changeSelect(null);
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this.canvas.state = new StateStandby(this.canvas);
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this.canvas.state.LeftMouseDown(pointF);
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}
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else
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{
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// 如果选择的图形是其他类型
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// 看看是否被选择了吧。
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var rect = this.canvas.SelectShape.GetBounds(this.canvas.shapes.GetMatrix());
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// 放大范围，
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// 这里根据宽度和高度的情况酌情放大范围
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float select_tolerance = 1;
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if (rect.Width < 4 || rect.Height < 4) select_tolerance = Math.Min(rect.Height, rect.Width) / 4;
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rect.X -= select_tolerance;
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rect.Y -= select_tolerance;
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rect.Width += select_tolerance * 2;
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rect.Height += select_tolerance * 2;
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path.AddRectangle(rect);
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// 判断是否
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if (path.IsVisible(pointF))
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{
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this.canvas.state = new StateChanging(this.canvas, pointF);
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this.canvas.state.LeftMouseDown(pointF);
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}
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else
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{
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// 转成待机模式
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this.canvas.changeSelect(null);
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this.canvas.state = new StateStandby(this.canvas);
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this.canvas.state.LeftMouseDown(pointF);
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}
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}
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//base.LeftMouseDown(pointF);
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}
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}
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}
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