c#+Gdi，怎么移动和改变已经绘制好的图形位置和大小

Question

用链表，画画时输入序号，类型，头尾位置。
鼠标移动时判断当前在什么位置，然后判断出在哪个画画上。

Answer 1

谁有比较好的例子啊？请问？

Answer 2

网上有一个画图的代码 用的纯对象的思路写的 我写的项目也是基于那个的点播  你可以自己下一个试试  搜索 C# 画图板

Answer 3

肯定要记录图形的坐标，数据结构+绘图，没有记录，怎么判断选中

Answer 4

每一个图形都用一个对象来封装处理就行了 
写个简单的鼠标移到图像上显示激活的例子 
其他拖动什么的，其实也只是实现MouseDown和MouseUp就行了
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace DrawTest
{
    public delegate void DrawMeHandler(Graphics g);
    public delegate void MouseMoveHandler(Point p);
    public partial class Canvas : UserControl
    {
        RectangleFigure rectangleFigure = new RectangleFigure();
        DrawMeHandler drawMeHandler;
        MouseMoveHandler mouseMoveHandler;
        public Canvas()
        {
            InitializeComponent();
            this.DoubleBuffered = true;
            this.Paint += Canvas_Paint;
            this.Load += Canvas_Load;
            this.MouseMove += Canvas_MouseMove;
        }        void Canvas_MouseMove(object sender, MouseEventArgs e)
        {
            this.mouseMoveHandler.Invoke(e.Location);
            this.Refresh();
        }        void Canvas_Load(object sender, EventArgs e)
        {
            rectangleFigure.X = 10;
            rectangleFigure.Y = 10;
            rectangleFigure.Width = 100;
            rectangleFigure.Height = 50;
            drawMeHandler = new DrawMeHandler(rectangleFigure.DrawMe);
            mouseMoveHandler = new MouseMoveHandler(rectangleFigure.MouseMove);
            
        }        void Canvas_Paint(object sender, PaintEventArgs e)
        {
            if (drawMeHandler != null) drawMeHandler.Invoke(e.Graphics);
        }
        /// <summary>
        /// 矩形对象
        /// </summary>
        public class RectangleFigure
        {
            
            public int X { get; set; }
            public int Y { get; set; }
            public int Height { get; set; }
            public int Width { get; set; }            public bool Actived { get; set; }            public bool IsExist(Point p)
            {
                Rectangle rectangle = new Rectangle(this.X, this.Y, this.Width, this.Height);
                return rectangle.Contains(p);
            }            public void MouseMove(Point p)
            {
                Actived = IsExist(p);
            }            public void DrawMe(Graphics g)
            {
                Pen p = new Pen(Color.Black);
                g.FillRectangle(p.Brush, this.X, this.Y, this.Width, this.Height);
                if (Actived)
                {
                    p.Color = Color.Red;
                    g.DrawRectangle(p, this.X, this.Y, this.Width, this.Height);
                }
            }
        }
    }
}