using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Drawing; using System.Windows.Forms; namespace Toolcs { class DragComponent { #region 实现窗体内的控件拖动 //用法：在Form初始化或者Form_Load时先执行 //DragComponent a = new DragComponent(); //a.initProperty(groupBox1); //将界面groupBox1上的所有控件都绑定MyMouseDown、MyMouseLeave、MyMouseMove事件。 private Control control; const int Band = 5; const int MinWidth = 10; const int MinHeight = 10; private EnumMousePointPosition m_MousePointPosition; private Point p , p1; private enum EnumMousePointPosition { MouseSizeNone = 0 , //'无 MouseSizeRight = 1 , //'拉伸右边框 MouseSizeLeft = 2 , //'拉伸左边框 MouseSizeBottom = 3 , //'拉伸下边框 MouseSizeTop = 4 , //'拉伸上边框 MouseSizeTopLeft = 5 , //'拉伸左上角 MouseSizeTopRight = 6 , //'拉伸右上角 MouseSizeBottomLeft = 7 , //'拉伸左下角 MouseSizeBottomRight = 8 , //'拉伸右下角 MouseDrag = 9 // '鼠标拖动 } private void MyMouseDown ( object sender , System.Windows.Forms.MouseEventArgs e ) { p.X = e.X; p.Y = e.Y; p1.X = e.X; p1.Y = e.Y; } private void MyMouseLeave ( object sender , System.EventArgs e ) { m_MousePointPosition = EnumMousePointPosition.MouseSizeNone; control.Cursor = Cursors.Arrow; } private EnumMousePointPosition MousePointPosition ( Size size , System.Windows.Forms.MouseEventArgs e ) { if ((e.X >= -1 * Band) | (e.X <= size.Width) | (e.Y >= -1 * Band) | (e.Y <= size.Height)) { if (e.X < Band) { if (e.Y < Band) { return EnumMousePointPosition.MouseSizeTopLeft; } else { if (e.Y > -1 * Band + size.Height) { return EnumMousePointPosition.MouseSizeBottomLeft; } else { return EnumMousePointPosition.MouseSizeLeft; } } } else { if (e.X > -1 * Band + size.Width) { if (e.Y < Band) { return EnumMousePointPosition.MouseSizeTopRight; } else { if (e.Y > -1 * Band + size.Height) { return EnumMousePointPosition.MouseSizeBottomRight; } else { return EnumMousePointPosition.MouseSizeRight; } } } else { if (e.Y < Band) { return EnumMousePointPosition.MouseSizeTop; } else { if (e.Y > -1 * Band + size.Height) { return EnumMousePointPosition.MouseSizeBottom; } else { return EnumMousePointPosition.MouseDrag; } } } } } else { return EnumMousePointPosition.MouseSizeNone; } } private void MyMouseMove ( object sender , System.Windows.Forms.MouseEventArgs e ) { Control lCtrl = (sender as Control); if (e.Button == MouseButtons.Left) { switch (m_MousePointPosition) { case EnumMousePointPosition.MouseDrag: lCtrl.Left = lCtrl.Left + e.X - p.X; lCtrl.Top = lCtrl.Top + e.Y - p.Y; break; case EnumMousePointPosition.MouseSizeBottom: lCtrl.Height = lCtrl.Height + e.Y - p1.Y; p1.X = e.X; p1.Y = e.Y; //'记录光标拖动的当前点 break; case EnumMousePointPosition.MouseSizeBottomRight: lCtrl.Width = lCtrl.Width + e.X - p1.X; lCtrl.Height = lCtrl.Height + e.Y - p1.Y; p1.X = e.X; p1.Y = e.Y; //'记录光标拖动的当前点 break; case EnumMousePointPosition.MouseSizeRight: lCtrl.Width = lCtrl.Width + e.X - p1.X; // lCtrl.Height = lCtrl.Height + e.Y - p1.Y; p1.X = e.X; p1.Y = e.Y; //'记录光标拖动的当前点 break; case EnumMousePointPosition.MouseSizeTop: lCtrl.Top = lCtrl.Top + (e.Y - p.Y); lCtrl.Height = lCtrl.Height - (e.Y - p.Y); break; case EnumMousePointPosition.MouseSizeLeft: lCtrl.Left = lCtrl.Left + e.X - p.X; lCtrl.Width = lCtrl.Width - (e.X - p.X); break; case EnumMousePointPosition.MouseSizeBottomLeft: lCtrl.Left = lCtrl.Left + e.X - p.X; lCtrl.Width = lCtrl.Width - (e.X - p.X); lCtrl.Height = lCtrl.Height + e.Y - p1.Y; p1.X = e.X; p1.Y = e.Y; //'记录光标拖动的当前点 break; case EnumMousePointPosition.MouseSizeTopRight: lCtrl.Top = lCtrl.Top + (e.Y - p.Y); lCtrl.Width = lCtrl.Width + (e.X - p1.X); lCtrl.Height = lCtrl.Height - (e.Y - p.Y); p1.X = e.X; p1.Y = e.Y; //'记录光标拖动的当前点 break; case EnumMousePointPosition.MouseSizeTopLeft: lCtrl.Left = lCtrl.Left + e.X - p.X; lCtrl.Top = lCtrl.Top + (e.Y - p.Y); lCtrl.Width = lCtrl.Width - (e.X - p.X); lCtrl.Height = lCtrl.Height - (e.Y - p.Y); break; default: break; } if (lCtrl.Width < MinWidth) lCtrl.Width = MinWidth; if (lCtrl.Height < MinHeight) lCtrl.Height = MinHeight; } else { m_MousePointPosition = MousePointPosition(lCtrl.Size , e); //'判断光标的位置状态 switch (m_MousePointPosition) //'改变光标 { case EnumMousePointPosition.MouseSizeNone: control.Cursor = Cursors.Arrow; //'箭头 break; case EnumMousePointPosition.MouseDrag: control.Cursor = Cursors.SizeAll; //'四方向 break; case EnumMousePointPosition.MouseSizeBottom: control.Cursor = Cursors.SizeNS; //'南北 break; case EnumMousePointPosition.MouseSizeTop: control.Cursor = Cursors.SizeNS; //'南北 break; case EnumMousePointPosition.MouseSizeLeft: control.Cursor = Cursors.SizeWE; //'东西 break; case EnumMousePointPosition.MouseSizeRight: control.Cursor = Cursors.SizeWE; //'东西 break; case EnumMousePointPosition.MouseSizeBottomLeft: control.Cursor = Cursors.SizeNESW; //'东北到南西 break; case EnumMousePointPosition.MouseSizeBottomRight: control.Cursor = Cursors.SizeNWSE; //'东南到西北 break; case EnumMousePointPosition.MouseSizeTopLeft: control.Cursor = Cursors.SizeNWSE; //'东南到西北 break; case EnumMousePointPosition.MouseSizeTopRight: control.Cursor = Cursors.SizeNESW; //'东北到南西 break; default: break; } } } public void initProperty (Control ctl) { control = ctl; for (int i = 0 ; i < control.Controls.Count ; i++) { control.Controls[i].MouseDown += new System.Windows.Forms.MouseEventHandler(MyMouseDown); control.Controls[i].MouseLeave += new System.EventHandler(MyMouseLeave); control.Controls[i].MouseMove += new System.Windows.Forms.MouseEventHandler(MyMouseMove); } } #endregion } } |
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