C# 各种控件实现可拖动和调整大小
2021-04-10 10:27
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 .Width) | (e.Y >= -1 * Band) | (e.Y .Height)) { if (e.X if (e.Y 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 return EnumMousePointPosition.MouseSizeTopRight; } else { if (e.Y > -1 * Band + size.Height) { return EnumMousePointPosition.MouseSizeBottomRight; } else { return EnumMousePointPosition.MouseSizeRight; } } } else { if (e.Y 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个人觉的这有问题独自修改
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;public 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
}
public 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;
}
public void MyMouseLeave(object sender, System.EventArgs e)
{m_MousePointPosition = EnumMousePointPosition.MouseSizeNone;
control.Cursor = Cursors.Arrow;
}
public EnumMousePointPosition MousePointPosition(Size size, System.Windows.Forms.MouseEventArgs e)
{if ((e.X >= -1 * Band) | (e.X = -1 * Band) | (e.Y {
if (e.X {
if (e.Y {
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 {
return EnumMousePointPosition.MouseSizeTopRight;
}else
{if (e.Y > -1 * Band + size.Height)
{
return EnumMousePointPosition.MouseSizeBottomRight;
}else
{
return EnumMousePointPosition.MouseSizeRight;
}}
}
else
{if (e.Y {
return EnumMousePointPosition.MouseSizeTop;
}else
{if (e.Y > -1 * Band + size.Height)
{
return EnumMousePointPosition.MouseSizeBottom;
}else
{
return EnumMousePointPosition.MouseDrag;
}}
}
}
}
else
{
return EnumMousePointPosition.MouseSizeNone;
}}
public 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
if (lCtrl.Height
}
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;
control.MouseDown += new System.Windows.Forms.MouseEventHandler(MyMouseDown);
control.MouseLeave += new System.EventHandler(MyMouseLeave);
control.MouseMove += new System.Windows.Forms.MouseEventHandler(MyMouseMove);
}#endregion
}
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