- 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++)
- {
- _MControl.Parent.Controls.Remove(_lbl[i]);
- }
- _MControl.Parent.Controls.Remove(_MControl);
- _textbox.Parent.Controls.Remove(_textbox);
- }
- if (e.KeyValue == 17)
- {
- _IsCtrlKey = true;
- //MessageBox.Show("a");
- }
- }
- #endregion
- #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
- #region 调整大小触模柄鼠标事件
- private void handle_MouseDown(object sender, MouseEventArgs e)
- {
- _dragging = true;
- _startl = _MControl.Left;
- _startt = _MControl.Top;
- _startw = _MControl.Width;
- _starth = _MControl.Height;
- HideHandles();
- }
- // 通过触模柄调整控件大小
- // 0 1 2
- // 7 3
- // 6 5 4
- private void handle_MouseMove(object sender, MouseEventArgs e)
- {
- int l = _MControl.Left;
- int w = _MControl.Width;
- int t = _MControl.Top;
- int h = _MControl.Height;
- if (_dragging)
- {
- switch (((Label)sender).TabIndex)
- {
- //l算法:控件左边X坐标 + 鼠标在触模柄X坐标 < 控件左边X坐标 + 父控件宽度 - 控件大小 ?控件左边X坐标 + 鼠标在触模柄X坐标 :控件左边X坐标 + 父控件宽度 - 控件大小
- //t算法:
- //w算法:
- //h算法:
- case 0: // _dragging top-left sizing box
- l = _startl + e.X < _startl + _startw - MIN_SIZE ? _startl + e.X : _startl + _startw - MIN_SIZE;
- t = _startt + e.Y < _startt + _starth - MIN_SIZE ? _startt + e.Y : _startt + _starth - MIN_SIZE;
- w = _startl + _startw - _MControl.Left;
- h = _startt + _starth - _MControl.Top;
- break;
- case 1: // _dragging top-center sizing box
- t = _startt + e.Y < _startt + _starth - MIN_SIZE ? _startt + e.Y : _startt + _starth - MIN_SIZE;
- h = _startt + _starth - _MControl.Top;
- break;
- case 2: // _dragging top-right sizing box
- w = _startw + e.X > MIN_SIZE ? _startw + e.X : MIN_SIZE;
- t = _startt + e.Y < _startt + _starth - MIN_SIZE ? _startt + e.Y : _startt + _starth - MIN_SIZE;
- h = _startt + _starth - _MControl.Top;
- break;
- case 3: // _dragging right-middle sizing box
- w = _startw + e.X > MIN_SIZE ? _startw + e.X : MIN_SIZE;
- break;
- case 4: // _dragging right-bottom sizing box
- w = _startw + e.X > MIN_SIZE ? _startw + e.X : MIN_SIZE;
- h = _starth + e.Y > MIN_SIZE ? _starth + e.Y : MIN_SIZE;
- break;
- case 5: // _dragging center-bottom sizing box
- h = _starth + e.Y > MIN_SIZE ? _starth + e.Y : MIN_SIZE;
- break;
- case 6: // _dragging left-bottom sizing box
- l = _startl + e.X < _startl + _startw - MIN_SIZE ? _startl + e.X : _startl + _startw - MIN_SIZE;
- w = _startl + _startw - _MControl.Left;
- h = _starth + e.Y > MIN_SIZE ? _starth + e.Y : MIN_SIZE;
- break;
- case 7: // _dragging left-middle sizing box
- l = _startl + e.X < _startl + _startw - MIN_SIZE ? _startl + e.X : _startl + _startw - MIN_SIZE;
- w = _startl + _startw - _MControl.Left;
- break;
- }
- l = (l < 0) ? 0 : l;
- t = (t < 0) ? 0 : t;
- _MControl.SetBounds(l, t, w, h);
- }
- }
- private void handle_MouseUp(object sender, MouseEventArgs e)
- {
- _dragging = false;
- MoveHandles();
- ShowHandles();
- }
- #endregion
- #region private方法
- private void Create()
- {
- //_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 CreateTextBox()
- {
- _textbox = new TextBox();
- _textbox.CreateControl();
- _textbox.Parent = _MControl.Parent;
- _textbox.Width = 0;
- _textbox.Height = 0;
- _textbox.TabStop = true;
- _textbox.KeyDown += new System.Windows.Forms.KeyEventHandler(textBox_KeyDown);
- }
- private void ControlLocality()
- {
- if (_MControl.Location.X < 0)
- {
- _MControl.Visible = false;
- _MControl.Left = 0;
- }
- if (_MControl.Location.Y < 0)
- {
- _MControl.Visible = false;
- _MControl.Top = 0;
- }
- if (_MControl.Location.X + _MControl.Width > _MControl.Parent.Width)
- {
- _MControl.Visible = false;
- _MControl.Left = _MControl.Parent.Width - _MControl.Width;
- }
- if (_MControl.Location.Y + _MControl.Height > _MControl.Parent.Height)
- {
- _MControl.Visible = false;
- _MControl.Top = _MControl.Parent.Height - _MControl.Height;
- }
- }
- private void HideHandles()
- {
- for (int i = 0; i < 8; i++)
- {
- _lbl[i].Visible = false;
- }
- }
- private void MoveHandles()
- {
- int sX = _MControl.Left - BOX_SIZE;
- int sY = _MControl.Top - BOX_SIZE;
- int sW = _MControl.Width + BOX_SIZE;
- int sH = _MControl.Height + BOX_SIZE;
- int hB = BOX_SIZE / 2;
- int[] arrPosX = new int[] {sX+hB, sX + sW / 2, sX + sW-hB, sX + sW-hB,
- sX + sW-hB, sX + sW / 2, sX+hB, sX+hB};
- int[] arrPosY = new int[] {sY+hB, sY+hB, sY+hB, sY + sH / 2, sY + sH-hB,
- sY + sH-hB, sY + sH-hB, sY + sH / 2};
- for (int i = 0; i < 8; i++)
- {
- _lbl[i].SetBounds(arrPosX[i], arrPosY[i], BOX_SIZE, BOX_SIZE);
- }
- }
- private void ShowHandles()
- {
- if (_MControl != null)
- {
- for (int i = 0; i < 8; i++)
- {
- _lbl[i].Visible = true;
- }
- }
- }
- #endregion
- }
- }
接下来在一个窗体上放一个控件和按钮
在按钮的单击事件里写
- AllTest.BarcodeControl barcode = new BarcodeControl(控件); //传入控件即可看到效果