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C#自定义控件的放置与拖动

article 2024/12/22 10:22:35

1、自定义控件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PartApp.Uc
{
   
    public class And:Control
    {
   
        private bool dragging = false;
        private Point dragCursorPoint;
        private Point dragFormPoint;
        public And()
        {
   
            SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            this.MouseUp += And_MouseUp;
            this.MouseMove += And_MouseMove;
            this.MouseDown += And_MouseDown;
        }

        private void And_MouseDown(object sender, MouseEventArgs e)
        {
   
            dragging = true;
            dragCursorPoint = Cursor.Position;
            dragFormPoint = this.Location;
        }

        private void And_MouseMove(object sender, MouseEventArgs e)
        {
   
            if (dragging)
            {
   
                Point dif = Point.Subtract(Cursor.Position, new Size(dragCursorPoint));
                this.Location