首次提交：本地项目同步到Gitea

LibShapes/Core/State/StateCanvasMove.cs

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+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+
+namespace Io.Github.Kerwinxu.LibShapes.Core.State
+{
+    /// <summary>
+    /// 画布整体的移动
+    /// </summary>
+    public class StateCanvasMove:State
+    {
+        public StateCanvasMove(UserControlCanvas canvas, PointF start_pointF) : base(canvas, start_pointF)
+        {
+
+        }
+        public StateCanvasMove(UserControlCanvas canvas) : base(canvas)
+        {
+
+        }
+
+        // 移动的话，我这个类会保存原先的偏移
+        private float old_offsetX, old_offsetY;
+
+        private Shapes oldShapes;
+
+        public override void LeftMouseDown(PointF pointF)
+        {
+            this.oldShapes = this.canvas.shapes.DeepClone();
+            // 保存偏移
+            old_offsetX = this.canvas.shapes.pointTransform.OffsetX;
+            old_offsetY = this.canvas.shapes.pointTransform.OffsetY;
+            startPoint = pointF;
+
+            base.LeftMouseDown(pointF);
+        }
+
+        public override void LeftMouseMove(PointF pointF)
+        {
+            float diffx = pointF.X - startPoint.X;
+            float diffy = pointF.Y - startPoint.Y;
+            // 然后修改偏移
+            this.canvas.shapes.pointTransform.OffsetX = old_offsetX + diffx;
+            this.canvas.shapes.pointTransform.OffsetY = old_offsetY + diffy;
+            
+            //base.LeftMouseMove(pointF);
+        }
+
+        public override void LeftMouseUp(PointF pointF)
+        {
+            // 保存命令，
+            this.canvas.commandRecorder.addCommand(new Command.CommandShapesChanged() { 
+                canvas = this.canvas,
+                OldShapes = this.oldShapes,
+                NewShapes = this.canvas.shapes.DeepClone(),
+            });
+            //base.LeftMouseUp(pointF);
+        }
+    }
+}