创建可拖动控件

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最新推荐文章于 2025-04-09 10:30:59 发布

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分类专栏： C#技术文章标签： textbox object 算法 null delete system

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/**///

using System;
using System.Windows.Forms;
using System.Drawing;

namespace ImageTool
{
    /**/
    public class ControlMove
    {

        private定义

        构造函数#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 ControlMove(Control moveControl)


        #endregion

        需拖动控件键盘事件

        需拖动控件鼠标事件#region 需拖动控件鼠标事件

        private void Control_Click(object sender, System.EventArgs e)
        {
            _textbox.Focus();
            _MControl = (sender as Control);
            MoveHandles();

            if (_IsCtrlKey == false)
            {
                for(int i=0;i<_MControl.Parent.Controls.Count;i++)
                {
                    if(_MControl.Parent.Controls[i].Text.Trim().Length == 0 && _MControl.Parent.Controls[i] is Label)
                    {
                        _MControl.Parent.Controls[i].Visible = false;
                    }
                }
            }
        }

        private void Control_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            _IsMouseDown = true;
            _oPointClicked = new Point(e.X,e.Y);
            for (int i = 0; i<8; i++)
            {
                _MControl.Parent.Controls.Add(_lbl[i]);
                _lbl[i].BringToFront();
            }
            HideHandles();
        }

        private void Control_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            _IsMouseDown = false;
            MoveHandles();
            ShowHandles();
            _MControl.Visible = true;
        }

        private void Control_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            if(_IsMouseDown)
            {
                int l =  _MControl.Left + e.X - _oPointClicked.X;
                int t = _MControl.Top + e.Y - _oPointClicked.Y;
                int w = _MControl.Width;
                int h = _MControl.Height;
                l =(l<0)?0:((l+w > _MControl.Parent.ClientRectangle.Width)?
                    _MControl.Parent.ClientRectangle.Width-w:l);
                t =(t<0)?0:((t+h> _MControl.Parent.ClientRectangle.Height)?
                    _MControl.Parent.ClientRectangle.Height-h:t);
                _MControl.Left = l;
                _MControl.Top = t;
                ControlLocality();
            }
            //_MControl.Cursor=Cursors.SizeAll;
        }

        #endregion

        调整大小触模柄鼠标事件

        private方法
    }
}