学步园

using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Windows.Forms;

namespace AllTest
{
    class BarcodeControl
    {
        #region private

        private const int MIN_SIZE = 10; //对控件缩放的最小值
        private const int BOX_SIZE = 7;  //调整大小触模柄方框大小

        public bool _IsCtrlKey = false;
        private TextBox _textbox;
        private Control _MControl = null;
        private bool _IsMouseDown = false;
        private Point _oPointClicked;
        private Color BOX_COLOR = Color.White;
        private Label[] _lbl = new Label[8];
        private int _startl, _startt, _startw, _starth;
        private bool _dragging;
        private Cursor[] _arrArrow = new Cursor[] {Cursors.SizeNWSE, Cursors.SizeNS,
                                                    Cursors.SizeNESW, Cursors.SizeWE, Cursors.SizeNWSE, Cursors.SizeNS,
                                                    Cursors.SizeNESW, Cursors.SizeWE};

        #endregion

        #region 构造函数

        /// <summary>
        /// 构造控件拖动对象
        /// </summary>
        /// <param name="moveControl">需要拖动的控件 </param>
        public BarcodeControl(Control moveControl)
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
            _MControl = moveControl;
            _MControl.MouseDown += new MouseEventHandler(this.Control_MouseDown);
            _MControl.MouseUp += new MouseEventHandler(this.Control_MouseUp);
            _MControl.MouseMove += new MouseEventHandler(this.Control_MouseMove);
            _MControl.Click += new System.EventHandler(this.Control_Click);

            //构造8个调整大小触模柄
            for (int i = 0; i < 8; i++)
            {
                _lbl[i] = new Label();
                _lbl[i].TabIndex = i;
                _lbl[i].FlatStyle = 0;
                _lbl[i].BorderStyle = BorderStyle.FixedSingle;
                _lbl[i].BackColor = BOX_COLOR;
                _lbl[i].Cursor = _arrArrow[i];
                _lbl[i].Text = "";
                _lbl[i].BringToFront();
                _lbl[i].MouseDown += new MouseEventHandler(this.handle_MouseDown);
                _lbl[i].MouseMove += new MouseEventHandler(this.handle_MouseMove);
                _lbl[i].MouseUp += new MouseEventHandler(this.handle_MouseUp);
            }

            CreateTextBox();
            Create();

            //Control_Click((object)sender, (System.EventArgs)e);
        }

        #endregion

        #region 需拖动控件键盘事件

        private void textBox_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
        {
            if (e.KeyValue == 37 || e.KeyValue == 38 || e.KeyValue == 39 || e.KeyValue == 40)
            {
                if (e.KeyValue == 37)
                    _MControl.Left -= 1;
                if (e.KeyValue == 38)
                    _MControl.Top -= 1;
                if (e.KeyValue == 39)
                    _MControl.Left += 1;
                if (e.KeyValue == 40)
                    _MControl.Top += 1;
                MoveHandles();
                ControlLocality();
                _MControl.Visible = true;
            }

            if (e.KeyValue == 46)
            {
                for (int i = 0; i < 8; i++)