C# winform 运行时可以调整大小和位置的文本框

忘是亡心i 2024-02-19 15:29 62阅读 0赞

1.使用鼠标控制位置：在任意位置点击左键拖动

2.使用鼠标控制大小：在控件右下角待变为‘调整光标’是可以调整大小

3.使用键盘控制位置：alt + 方向键

4.使用键盘控制大小：ctrl + 方向键

using System.ComponentModel;  
using System.Drawing;  
using System.Windows.Forms;  
  
  
namespace AppGenCode.Printer  
\{  
  
  
public enum EnumAdjust  
\{  
Nothing =0,  
Size = 1,  
Postion = 2  
\}  
  
  
public partial class AdjustTextBox : TextBox  
\{  
public AdjustTextBox()  
\{  
InitializeComponent();  
InitCtrl();  
\}  
  
  
public AdjustTextBox(IContainer container)  
\{  
container.Add(this);  
InitializeComponent();  
InitCtrl();  
\}  
  
  
private bool m\_isMoving = false;  
private Point m\_offset = new Point(0,0);  
private Size m\_intSize = new Size(0, 0);  
private EnumAdjust m\_adjust = EnumAdjust.Nothing;  
private int m\_x, m\_y, m\_w, m\_h = 0;  
  
  
private Rectangle RecAdjustSize  
\{  
get \{ return new Rectangle(this.Width-15,this.Height-15,15,15);\}  
\}  
private Rectangle RecAdjustPostion  
\{  
get \{ return new Rectangle(0, 0, this.Width, this.Height); \}  
\}  
  
  
private void InitCtrl()  
\{  
this.Text = "asdf1234";  
this.Multiline = true;  
this.BorderStyle = BorderStyle.FixedSingle;  
this.ReadOnly = true;  
\}  
\#region 鼠标事件  
protected override void OnMouseDown(MouseEventArgs e)  
\{  
m\_isMoving = true;  
m\_offset = new Point(e.X, e.Y);  
m\_intSize.Width = this.Width;  
m\_intSize.Height = this.Height;  
  
  
if (RecAdjustSize.Contains(e.X, e.Y)) //调整大小  
\{  
this.Cursor = Cursors.SizeNWSE;  
m\_adjust = EnumAdjust.Size;  
\}  
else if (RecAdjustPostion.Contains(e.X, e.Y)) //调整位置  
\{  
this.Cursor = Cursors.SizeAll;  
m\_adjust = EnumAdjust.Postion;  
\}  
else  
\{  
m\_adjust = EnumAdjust.Nothing;  
\}  
base.OnMouseDown(e);  
\}  
protected override void OnMouseUp(MouseEventArgs mevent)  
\{  
Cursor = Cursors.Default;  
m\_isMoving = false;  
  
base.OnMouseUp(mevent);  
\}  
protected override void OnMouseMove(MouseEventArgs e)  
\{  
CursorCtrl(e.X, e.Y);  
m\_x = this.Left;  
m\_y = this.Top;  
m\_w = this.Width;  
m\_h = this.Height;  
if (m\_isMoving)  
\{  
switch (m\_adjust)  
\{  
case EnumAdjust.Size:  
m\_w = m\_intSize.Width + (e.X - m\_offset.X);  
m\_h = m\_intSize.Height + (e.Y - m\_offset.Y);  
break;  
case EnumAdjust.Postion:  
m\_x = Location.X + (e.X - m\_offset.X);  
m\_y = Location.Y + (e.Y - m\_offset.Y);  
break;  
\}  
BackColor = Color.Red;  
this.SetBounds(m\_x, m\_y, m\_w, m\_h);  
\}  
base.OnMouseMove(e);  
\}  
\#endregion  
  
  
\#region 键盘事件  
  
  
protected override void OnPreviewKeyDown(PreviewKeyDownEventArgs e)  
\{  
base.OnPreviewKeyDown(e);  
if (e.Alt) //调整大小  
\{  
switch (e.KeyCode)  
\{  
case Keys.Left:  
this.Width -= 5;  
break;  
case Keys.Right:  
this.Width += 5;  
break;  
case Keys.Down:  
this.Height += 5;  
break;  
case Keys.Up:  
this.Height -= 5;  
break;  
\}  
return;  
\}  
if (e.Control)  
\{  
switch (e.KeyCode) //调整位置  
\{  
case Keys.Left:  
this.Left -= 5;  
break;  
case Keys.Right:  
this.Left += 5;  
break;  
case Keys.Up:  
this.Top -= 5;  
break;  
case Keys.Down:  
this.Top += 5;  
break;  
\}  
\}  
\}  
\#endregion  
  
  
private void CursorCtrl(int x,int y)  
\{  
if (!m\_isMoving && RecAdjustSize.Contains(x,y))  
\{  
this.Cursor = Cursors.SizeNWSE;  
return;  
\}  
this.Cursor = Cursors.Default;  
\}  
\}  
\}

草青工作室：http://blog.csdn.net/xxj\_jing  
原文地址：http://blog.csdn.net/xxj\_jing/article/details/8594946