122 lines
4.2 KiB
C#
122 lines
4.2 KiB
C#
using Io.Github.Kerwinxu.LibShapes.Core.State.ChangeStrategy;
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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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using System.Windows.Forms;
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namespace Io.Github.Kerwinxu.LibShapes.Core.State
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{
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/// <summary>
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/// 更改状态，都是选择后才有的。
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/// </summary>
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public class StateChanging:State
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{
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public StateChanging(UserControlCanvas canvas, PointF start_pointF) : base(canvas, start_pointF)
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{
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}
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public StateChanging(UserControlCanvas canvas) : base(canvas)
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{
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}
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/// <summary>
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/// 原先的
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/// </summary>
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private Shapes oldShapes;
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/// <summary>
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/// 当前选择的策略
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/// </summary>
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private IChangeStrategy changeStrategy;
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/// <summary>
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/// 所有的策略
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/// </summary>
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private IChangeStrategy[] changeStrategies = {
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// 先4个角点
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new ChangeStrategy.ResizeModeNorthEast(),
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new ChangeStrategy.ResizeModeNorthWest(),
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new ChangeStrategy.ResizeModeSorthWest(),
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new ChangeStrategy.ResizeModeSouthEast(),
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// 然后4个方向
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new ChangeStrategy.ResizeModeEast(),
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new ChangeStrategy.ResizeModeNorth(),
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new ChangeStrategy.ResizeModeSouth(),
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new ChangeStrategy.ResizeModeWest(),
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// 最后是移动
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new ChangeStrategy.MoveMode()
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};
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public override void LeftMouseDown(PointF pointF)
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{
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oldShapes = this.canvas.shapes.DeepClone();
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// 这个首先看一下是在四面还是八方上，运算是不同的。
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// 这里取得坐标
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var path = new GraphicsPath();
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path.AddRectangle(this.canvas.SelectShape.GetBounds(this.canvas.shapes.GetMatrix()));
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if (path.PointCount == 0) return;
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var points = path.PathPoints;
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foreach (var item in changeStrategies)
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{
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if (item.isRight(points, pointF))
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{
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changeStrategy = item;
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Cursor cursor = item.changeCursor();
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if (cursor != null) this.canvas.Cursor = cursor;// 更改鼠标样式。
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return;
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}
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}
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changeStrategy = null;
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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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if (changeStrategy != null && this.canvas.SelectShape != null)
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{
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// 这里要判断是否对齐网格
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changeStrategy.action(
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this.canvas.SelectShape,
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cantosPointToVirtualPoint(this.startPoint),
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cantosPointToVirtualPoint(this.canvas.gridAlign(pointF)));
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this.canvas.Refresh();
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}
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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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// 结束更改操作，然后转成选择模式
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if (changeStrategy != null && this.canvas.SelectShape != null)
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{
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changeStrategy.action(
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this.canvas.SelectShape,
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cantosPointToVirtualPoint(this.startPoint),
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cantosPointToVirtualPoint(this.canvas.gridAlign(pointF)));
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var old = this.canvas.SelectShape.DeepClone(); // 保存旧的
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this.canvas.SelectShape.ChangeComplated(); // 更改状态
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//
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this.canvas.commandRecorder.addCommand( // 发送命令
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new Command.CommandShapesChanged()
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{
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canvas = this.canvas,
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OldShapes = this.oldShapes,
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NewShapes = this.canvas.shapes.DeepClone()
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}) ;
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}
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// 转成
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this.canvas.state = new StateSelected(this.canvas);
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this.canvas.Cursor = Cursors.Default;// 换到原先的鼠标样式
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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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