[C#] - 用户自定义控件(含源代码)-透明文本框=

[C#] - 用户自定义控件(含源代码)-透明文本框透明文本框

由于在只能下载*.dll的文件，没有代码，所以特意发出源代码。

using System;

using System.Collections;

using ponentModel;

using System.Drawing;

using System.Data;

using System.Windows.Forms;

using System.Drawing.Imaging;

namespace ZBobb

{

///

/// AlphaBlendTextBox: A .Net textbox that can be translucent to the background.

/// (C) 2003 Bob Bradley / ZBobb@

///

public class AlphaBlendTextBox : System.Windows.Forms.TextBox

{

#region private variables

private uPictureBox myPictureBox;

private bool myUpToDate = false;

private bool myCaretUpToDate = false;

private Bitmap myBitmap;

private Bitmap myAlphaBitmap;

private int myFontHeight = 10;

private System.Windows.Forms.Timer myTimer1;

private bool myCaretState = true;

private bool myPaintedFirstTime = false;

private Color myBackColor = Color.White;

private int myBackAlpha = 10;

///

/// Required designer variable.

///

private ponentModel.Container components = null;

#endregion// end private variables

#region public methods and overrides

public AlphaBlendTextBox()

{

// This call is required by the Windows.Forms Form Designer.

InitializeComponent();

// TODO: Add any initialization after the InitializeComponent call

this.BackColor = myBackColor;

this.SetStyle(erPaint, false);

this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);

this.SetStyle(ControlStyles.DoubleBuffer, true);

myPictureBox = new uPictureBox();

this.Controls.Add(myPictureBox);

myPictureBox.Dock = DockStyle.Fill;

}

protected override void OnResize(EventArgs e)

{

base.OnResize(e);

this.myBitmap = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);//(this.Width,this.Height);

this.myAlphaBitmap = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);//(this.Width,this.Height);

myUpToDate = false;

this.Invalidate();

}

//Some of these should be moved to the WndProc later

protected override void OnKeyDown(KeyEventArgs e)

{

base.OnKeyDown(e);

myUpToDate = false;

this.Invalidate();

}

protected override void OnKeyUp(KeyEventArgs e)

{

base.OnKeyUp(e);

myUpToDate = false;

this.Invalidate();

}

protected override void OnKeyPress(KeyPressEventArgs e)

{

base.OnKeyPress(e);

myUpToDate = false;

this.Invalidate();

}

protected override void OnMouseUp(MouseEventArgs e)

{

base.OnMouseUp(e);

this.Invalidate();

}

protected override void OnGiveFeedback(GiveFeedbackEventArgs gfbevent)

{

base.OnGiveFeedback(gfbevent);

myUpToDate = false;

this.Invalidate();

}

protected override void OnMouseLeave(EventArgs e)

{

//found this code to find the current cursor location

//at /FAQ/WinForms/FAQ_c50c.asp#q597q

Point ptCursor = Cursor.Position;

Form f = this.FindForm();

ptCursor = f.PointToClient(ptCursor);

if (!this.Bounds.Contains(ptCursor))