92 lines
2.7 KiB
C#
92 lines
2.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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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 ShapeRectSelect:State
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{
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protected PointF endPoint;
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private Pen penSelectShape = new Pen(Color.Black)
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{ // 选择框的画笔
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DashStyle = DashStyle.Dash,
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Width = 0.2f
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};
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public ShapeRectSelect(UserControlCanvas canvas, PointF start_pointF) : base(canvas, start_pointF)
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{
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}
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public ShapeRectSelect(UserControlCanvas canvas) : base(canvas)
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{
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}
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public void Draw(Graphics g)
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{
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// 这个其实是绘制一个矩形。
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g.DrawRectangle(
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penSelectShape,
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startPoint.X,
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startPoint.Y,
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endPoint.X-startPoint.X,
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endPoint.Y - startPoint.Y);
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}
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public override void LeftMouseDown(PointF pointF)
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{
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startPoint = pointF; // 只是保存开始地址
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base.LeftMouseDown(pointF);
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}
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public override void LeftMouseMove(PointF pointF)
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{
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// 保存
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endPoint = pointF;
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this.canvas.Refresh(); // 刷新。
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//base.LeftMouseMove(pointF);
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}
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public override void LeftMouseUp(PointF pointF)
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{
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// 这里看一下是否有选择图形
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endPoint = pointF;
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var _rect = new RectangleF(startPoint.X, startPoint.Y, endPoint.X - startPoint.X, endPoint.Y - startPoint.Y);
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var _shapes = this.canvas.shapes.getSelectShapes(_rect);
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if (_shapes!=null && _shapes.Count > 0)
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{
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// 要更改成选择模式
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this.canvas.state = new StateSelected(this.canvas);
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// 如果只是选择了一个。
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if (_shapes.Count == 1)
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{
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this.canvas.changeSelect(_shapes[0]); //
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}
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else
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{
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var multi = new Shape.ShapeMultiSelect();
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multi.shapes.AddRange(_shapes);
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this.canvas.changeSelect(multi); // 这个只是通知，但起始这个做不了修改的。
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}
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}
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else
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{
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// 说明没有选择图形
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this.canvas.changeSelect(null);
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this.canvas.state = new StateStandby(this.canvas);
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}
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this.canvas.Refresh();
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//base.LeftMouseUp(pointF);
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}
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}
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}
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