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[WinForm] XP样式的TextBox控件

Kalet Kalet 发表于2009-03-20 12:00:14 浏览195 评论0

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一个很简单的例子,重载TextBox,主要功能:

当BorderStyle为FixedSingle时:可以设置TextBox边框颜色;可以设置当鼠标Over或Leave控件的时候,TextBox边框颜色变化,以及是否启用这种HotTrack。 源码和例子 [WinForm] XP样式的TextBox控件

自由使用,转载注明出处。Ben.Hui<BenSoftCN#Gmail.Com>



TextBoxXP.cs
using System;
using System.ComponentModel;
using System.Collections;
using System.Diagnostics;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace BenSoftCN.WinForms.UI
{

    [ToolboxItem(
true)]
    
public class TextBoxXP : System.Windows.Forms.TextBox
    {
        
/// <summary>
        
/// 获得当前进程,以便重绘控件
        
/// </summary>
        
/// <param name="hWnd"></param>
        
/// <returns></returns>
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        
static extern IntPtr GetWindowDC(IntPtr hWnd);
        [System.Runtime.InteropServices.DllImport(
"user32.dll")]
        
static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

        
/// <summary>
        
/// 是否启用热点效果
        
/// </summary>
        private bool _HotTrack = true ;

        
/// <summary>
        
/// 边框颜色
        
/// </summary>
        private Color _BorderColor = Color.FromArgb(0xA7,0xA6,0xAA);

        
/// <summary>
        
/// 热点边框颜色
        
/// </summary>
        private Color _HotColor = Color.FromArgb(0x33,0x5E,0xA8);

        
/// <summary>
        
/// 是否鼠标MouseOver状态
        
/// </summary>
        private bool _IsMouseOver = false ;
        
        
#region 属性
        
/// <summary>
        
/// 是否启用热点效果
        
/// </summary>
        [ Category("行为"),
        Description(
"获得或设置一个值,指示当鼠标经过控件时控件边框是否发生变化。只在控件的BorderStyle为FixedSingle时有效"),
        DefaultValue(
true)]
        
public bool HotTrack
        {
            
get
            {
                
return this._HotTrack ;
            }
            
set
            {
                
this._HotTrack = value ;
                
//在该值发生变化时重绘控件,下同
                
//在设计模式下,更改该属性时,如果不调用该语句,
                
//则不能立即看到设计试图中该控件相应的变化
                this.Invalidate(); 
            }
        }
        
/// <summary>
        
/// 边框颜色
        
/// </summary>
        [ Category("外观"),
        Description(
"获得或设置控件的边框颜色"),
        DefaultValue(
typeof(Color),"#A7A6AA")]
        
public Color BorderColor
        {
            
get
            { 
                
return this._BorderColor; 
            }
            
set
            { 
                
this._BorderColor = value; 
                
this.Invalidate(); 
            }
        }   
        
/// <summary>
        
/// 热点时边框颜色
        
/// </summary>
        [ Category("外观"),
        Description(
"获得或设置当鼠标经过控件时控件的边框颜色。只在控件的BorderStyle为FixedSingle时有效"),
        DefaultValue(
typeof(Color),"#335EA8")]
        
public Color HotColor
        {
            
get
            { 
                
return this._HotColor; 
            }
            
set
            { 
                
this._HotColor = value; 
                
this.Invalidate(); 
            }
        }   
        
#endregion 属性

        
/// <summary>
        
/// 
        
/// </summary>
        public TextBoxXP():base()
        {            
        }

        
/// <summary>
        
/// 鼠标移动到该控件上时
        
/// </summary>
        
/// <param name="e"></param>
        protected override void OnMouseMove(MouseEventArgs e)
        {
            
//鼠标状态
            this._IsMouseOver = true ;
            
//如果启用HotTrack,则开始重绘
            
//如果不加判断这里不加判断,则当不启用HotTrack,
            
//鼠标在控件上移动时,控件边框会不断重绘,
            
//导致控件边框闪烁。下同
            
//谁有更好的办法?Please tell me , Thanks。
            if(this._HotTrack)
            {
                
//重绘
                this.Invalidate();
            }
            
base.OnMouseMove (e); [WinForm] XP样式的TextBox控件
        }
        
/// <summary>
        
/// 当鼠标从该控件移开时
        
/// </summary>
        
/// <param name="e"></param>
        protected override void OnMouseLeave(EventArgs e)
        {
            
this._IsMouseOver = false ;

            
if(this._HotTrack)
            {
                
//重绘
                this.Invalidate();
            }
            
base.OnMouseLeave (e);
        }
        
        
/// <summary>
        
/// 当该控件获得焦点时
        
/// </summary>
        
/// <param name="e"></param>
        protected override void OnGotFocus(EventArgs e)
        {

            
if(this._HotTrack)
            {
                
//重绘
                this.Invalidate();
            }
            
base.OnGotFocus (e);
        }
        
/// <summary>
        
/// 当该控件失去焦点时
        
/// </summary>
        
/// <param name="e"></param>
        protected override void OnLostFocus(EventArgs e)
        {
            
if(this._HotTrack)
            {
                
//重绘
                this.Invalidate();
            }
            
base.OnLostFocus (e);
        }

        
/// <summary>
        
/// 获得操作系统消息
        
/// </summary>
        
/// <param name="m"></param>
        protected override void WndProc(ref Message m)
        {

            
base.WndProc (ref m);
            
if (m.Msg==0xf || m.Msg==0x133)
            {
                
//拦截系统消息,获得当前控件进程以便重绘。
                
//一些控件(如TextBox、Button等)是由系统进程绘制,重载OnPaint方法将不起作用.
                
//所有这里并没有使用重载OnPaint方法绘制TextBox边框。
                
//
                
//MSDN:重写 OnPaint 将禁止修改所有控件的外观。
                
//那些由 Windows 完成其所有绘图的控件(例如 Textbox)从不调用它们的 OnPaint 方法,
                
//因此将永远不会使用自定义代码。请参见您要修改的特定控件的文档,
                
//查看 OnPaint 方法是否可用。如果某个控件未将 OnPaint 作为成员方法列出,
                
//则您无法通过重写此方法改变其外观。
                
//
                
//MSDN:要了解可用的 Message.Msg、Message.LParam 和 Message.WParam 值,
                
//请参考位于 MSDN Library 中的 Platform SDK 文档参考。可在 Platform SDK(“Core SDK”一节)
                
//下载中包含的 windows.h 头文件中找到实际常数值,该文件也可在 MSDN 上找到。
                IntPtr hDC = GetWindowDC(m.HWnd); 
                
if (hDC.ToInt32() == 0
                { 
                    
return
                } 

                
//只有在边框样式为FixedSingle时自定义边框样式才有效
                if(this.BorderStyle == BorderStyle.FixedSingle)
                {                
                    
//边框Width为1个像素
                    System.Drawing.Pen pen = new Pen(this._BorderColor,1) ;;
                
                    
if(this._HotTrack)
                    {                        
                        
if(this.Focused)
                        {
                            pen.Color 
= this._HotColor ;
                        }
                        
else
                        {
                            
if(this._IsMouseOver)
                            {
                                pen.Color
=this._HotColor;
                            }
                            
else
                            {
                                pen.Color 
= this._BorderColor ;
                            }
                        }                        
                    }
                    
//绘制边框
                    System.Drawing.Graphics g  = Graphics.FromHdc(hDC); 
                    g.SmoothingMode 
= System.Drawing.Drawing2D.SmoothingMode.AntiAlias;      
                    g.DrawRectangle(pen,
0,0,this.Width-1this.Height-1) ;
                    pen.Dispose();
                }
                
//返回结果
                m.Result = IntPtr.Zero; 
                
//释放
                ReleaseDC(m.HWnd,hDC);
            }
        }

    }
}

 

我在写的过程中发现了这个控件并不用 Paint 事件,所以只好直接截取 WndProc 函数了,很简单,是这样的:

Public Class TextBoxBlue
  Inherits TextBox

  Protected Overrides Sub WndProc(ByRef m As system.Windows.Forms.Message)
    MyBase.WndProc(m)
    Const WM_PAINT As Integer = &HF
    If m.Msg = WM_PAINT AndAlso Me.BorderStyle = BorderStyle.FixedSingle
Then
      Dim g As Graphics = Graphics.FromHwnd(Me.Handle)
      g.DrawRectangle(Pens.Blue, Me.ClientRectangle.Left,
Me.ClientRectangle.Top, Me.ClientRectangle.Width - 1,
Me.ClientRectangle.Height - 1)
      g.Dispose()
    End If
  End Sub
End Class
[WinForm] XP样式的TextBox控件
也可以自己添加一个属性叫做 BorderColor 来选择框架的颜色。 


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