c# groupbox大小,C# 实现可拖动和调整大小的控件
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Drawing;
using?System.Windows.Forms;
namespace?Toolcs
{
class?DragComponent
{
#region?實現窗體內的控件拖動
//用法：在Form初始化或者Form_Load時先執行
//DragComponent?a?=?new?DragComponent();
//a.initProperty(groupBox1);
//將界面groupBox1上的所有控件都綁定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?,?//'無
MouseSizeRight?=?1?,?//'拉伸右邊框
MouseSizeLeft?=?2?,?//'拉伸左邊框
MouseSizeBottom?=?3?,?//'拉伸下邊框
MouseSizeTop?=?4?,?//'拉伸上邊框
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?//?'鼠標拖動
}
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?
{
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;?//'記錄光標拖動的當前點
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;?//'記錄光標拖動的當前點
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;?//'記錄光標拖動的當前點
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;?//'記錄光標拖動的當前點
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;?//'記錄光標拖動的當前點
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);?//'判斷光標的位置狀態
switch?(m_MousePointPosition)?//'改變光標
{
case?EnumMousePointPosition.MouseSizeNone:
control.Cursor?=?Cursors.Arrow;???????//'箭頭
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;??????//'東西
break;
case?EnumMousePointPosition.MouseSizeRight:
control.Cursor?=?Cursors.SizeWE;??????//'東西
break;
case?EnumMousePointPosition.MouseSizeBottomLeft:
control.Cursor?=?Cursors.SizeNESW;????//'東北到南西
break;
case?EnumMousePointPosition.MouseSizeBottomRight:
control.Cursor?=?Cursors.SizeNWSE;????//'東南到西北
break;
case?EnumMousePointPosition.MouseSizeTopLeft:
control.Cursor?=?Cursors.SizeNWSE;????//'東南到西北
break;
case?EnumMousePointPosition.MouseSizeTopRight:
control.Cursor?=?Cursors.SizeNESW;????//'東北到南西
break;
default:
break;
}
}
}
public??void?initProperty?(Control?ctl)
{
control?=?ctl;
for?(int?i?=?0?;?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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