mirror of
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756 lines
25 KiB
C#
756 lines
25 KiB
C#
// ***********************************************************************
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// Assembly : HZH_Controls
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// Created : 08-08-2019
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//
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// ***********************************************************************
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// <copyright file="TextBoxTransparent.cs">
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// Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
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// </copyright>
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//
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// Blog: https://www.cnblogs.com/bfyx
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// GitHub：https://github.com/kwwwvagaa/NetWinformControl
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// gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
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//
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// If you use this code, please keep this note.
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// ***********************************************************************
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using System;
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using System.Collections;
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using System.ComponentModel;
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using System.Drawing;
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using System.Data;
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using System.Windows.Forms;
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using System.Drawing.Imaging;
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namespace HZH_Controls.Controls
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{
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/// <summary>
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/// Class TextBoxTransparent.
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/// Implements the <see cref="HZH_Controls.Controls.TextBoxEx" />
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/// </summary>
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/// <seealso cref="HZH_Controls.Controls.TextBoxEx" />
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public class TextBoxTransparent : TextBoxEx
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{
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#region private variables
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/// <summary>
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/// My PictureBox
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/// </summary>
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private uPictureBox myPictureBox;
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/// <summary>
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/// My up to date
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/// </summary>
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private bool myUpToDate = false;
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/// <summary>
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/// My caret up to date
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/// </summary>
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private bool myCaretUpToDate = false;
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/// <summary>
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/// My bitmap
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/// </summary>
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private Bitmap myBitmap;
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/// <summary>
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/// My alpha bitmap
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/// </summary>
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private Bitmap myAlphaBitmap;
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/// <summary>
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/// My font height
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/// </summary>
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private int myFontHeight = 10;
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/// <summary>
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/// My timer1
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/// </summary>
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private System.Windows.Forms.Timer myTimer1;
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/// <summary>
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/// My caret state
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/// </summary>
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private bool myCaretState = true;
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/// <summary>
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/// My painted first time
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/// </summary>
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private bool myPaintedFirstTime = false;
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/// <summary>
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/// My back color
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/// </summary>
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private Color myBackColor = Color.White;
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/// <summary>
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/// My back alpha
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/// </summary>
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private int myBackAlpha = 10;
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/// <summary>
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/// Required designer variable.
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/// </summary>
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private System.ComponentModel.Container components = null;
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#endregion // end private variables
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#region public methods and overrides
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/// <summary>
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/// Initializes a new instance of the <see cref="TextBoxTransparent" /> class.
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/// </summary>
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public TextBoxTransparent()
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{
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// This call is required by the Windows.Forms Form Designer.
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InitializeComponent();
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// TODO: Add any initialization after the InitializeComponent call
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this.BackColor = myBackColor;
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this.SetStyle(ControlStyles.UserPaint, false);
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this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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this.SetStyle(ControlStyles.DoubleBuffer, true);
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myPictureBox = new uPictureBox();
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this.Controls.Add(myPictureBox);
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myPictureBox.Dock = DockStyle.Fill;
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.Resize" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.EventArgs" />。</param>
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protected override void OnResize(EventArgs e)
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{
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base.OnResize(e);
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this.myBitmap = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);//(this.Width,this.Height);
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this.myAlphaBitmap = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);//(this.Width,this.Height);
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myUpToDate = false;
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this.Invalidate();
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}
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//Some of these should be moved to the WndProc later
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.KeyDown" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.KeyEventArgs" />。</param>
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protected override void OnKeyDown(KeyEventArgs e)
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{
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base.OnKeyDown(e);
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myUpToDate = false;
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this.Invalidate();
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.KeyUp" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.KeyEventArgs" />。</param>
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protected override void OnKeyUp(KeyEventArgs e)
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{
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base.OnKeyUp(e);
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myUpToDate = false;
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this.Invalidate();
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.KeyPress" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.KeyPressEventArgs" />。</param>
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protected override void OnKeyPress(KeyPressEventArgs e)
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{
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base.OnKeyPress(e);
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myUpToDate = false;
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this.Invalidate();
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.MouseUp" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.MouseEventArgs" />。</param>
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protected override void OnMouseUp(MouseEventArgs e)
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{
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base.OnMouseUp(e);
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this.Invalidate();
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.GiveFeedback" /> 事件。
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/// </summary>
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/// <param name="gfbevent">包含事件数据的 <see cref="T:System.Windows.Forms.GiveFeedbackEventArgs" />。</param>
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protected override void OnGiveFeedback(GiveFeedbackEventArgs gfbevent)
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{
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base.OnGiveFeedback(gfbevent);
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myUpToDate = false;
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this.Invalidate();
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.MouseLeave" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.EventArgs" />。</param>
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protected override void OnMouseLeave(EventArgs e)
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{
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//found this code to find the current cursor location
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//at http://www.syncfusion.com/FAQ/WinForms/FAQ_c50c.asp#q597q
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Point ptCursor = Cursor.Position;
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Form f = this.FindForm();
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ptCursor = f.PointToClient(ptCursor);
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if (!this.Bounds.Contains(ptCursor))
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base.OnMouseLeave(e);
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.ChangeUICues" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.UICuesEventArgs" />。</param>
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protected override void OnChangeUICues(UICuesEventArgs e)
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{
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base.OnChangeUICues(e);
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myUpToDate = false;
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this.Invalidate();
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}
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//--
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.GotFocus" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.EventArgs" />。</param>
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protected override void OnGotFocus(EventArgs e)
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{
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base.OnGotFocus(e);
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myCaretUpToDate = false;
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myUpToDate = false;
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this.Invalidate();
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myTimer1 = new System.Windows.Forms.Timer(this.components);
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myTimer1.Interval = (int)win32.GetCaretBlinkTime(); // usually around 500;
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myTimer1.Tick += new EventHandler(myTimer1_Tick);
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myTimer1.Enabled = true;
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.LostFocus" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.EventArgs" />。</param>
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protected override void OnLostFocus(EventArgs e)
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{
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base.OnLostFocus(e);
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myCaretUpToDate = false;
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myUpToDate = false;
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this.Invalidate();
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myTimer1.Dispose();
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}
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//--
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.FontChanged" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.EventArgs" />。</param>
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protected override void OnFontChanged(EventArgs e)
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{
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if (this.myPaintedFirstTime)
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this.SetStyle(ControlStyles.UserPaint, false);
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base.OnFontChanged(e);
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if (this.myPaintedFirstTime)
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this.SetStyle(ControlStyles.UserPaint, true);
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myFontHeight = GetFontHeight();
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myUpToDate = false;
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this.Invalidate();
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}
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/// <summary>
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/// Handles the <see cref="E:TextChanged" /> event.
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/// </summary>
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/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
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protected override void OnTextChanged(EventArgs e)
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{
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base.OnTextChanged(e);
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myUpToDate = false;
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this.Invalidate();
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}
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/// <summary>
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/// 处理 Windows 消息。
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/// </summary>
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/// <param name="m">一个 Windows 消息对象。</param>
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protected override void WndProc(ref Message m)
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{
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base.WndProc(ref m);
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// need to rewrite as a big switch
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if (m.Msg == win32.WM_PAINT)
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{
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myPaintedFirstTime = true;
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if (!myUpToDate || !myCaretUpToDate)
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GetBitmaps();
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myUpToDate = true;
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myCaretUpToDate = true;
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if (myPictureBox.Image != null) myPictureBox.Image.Dispose();
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if (string.IsNullOrEmpty(this.Text) && !string.IsNullOrEmpty(this.PromptText))
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{
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Bitmap bit = (Bitmap)myAlphaBitmap.Clone();
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Graphics g = Graphics.FromImage(bit);
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SizeF sizet1 = g.MeasureString(this.PromptText, this.PromptFont);
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g.DrawString(this.PromptText, this.PromptFont, new SolidBrush(PromptColor), new PointF(3, (bit.Height - sizet1.Height) / 2));
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g.Dispose();
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myPictureBox.Image = bit;
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}
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else
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{
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myPictureBox.Image = (Image)myAlphaBitmap.Clone();
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}
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}
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else if (m.Msg == win32.WM_HSCROLL || m.Msg == win32.WM_VSCROLL)
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{
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myUpToDate = false;
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this.Invalidate();
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}
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else if (m.Msg == win32.WM_LBUTTONDOWN
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|| m.Msg == win32.WM_RBUTTONDOWN
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|| m.Msg == win32.WM_LBUTTONDBLCLK
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// || m.Msg == win32.WM_MOUSELEAVE ///****
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)
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{
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myUpToDate = false;
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this.Invalidate();
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}
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else if (m.Msg == win32.WM_MOUSEMOVE)
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{
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if (m.WParam.ToInt32() != 0) //shift key or other buttons
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{
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myUpToDate = false;
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this.Invalidate();
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}
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}
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if (m.Msg == 15 || m.Msg == 7 || m.Msg == 8)
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{
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base.OnPaint(null);
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}
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}
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/// <summary>
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/// Clean up any resources being used.
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/// </summary>
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/// <param name="disposing">为 true 则释放托管资源和非托管资源；为 false 则仅释放非托管资源。</param>
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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//this.BackColor = Color.Pink;
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if (components != null)
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{
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components.Dispose();
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}
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}
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base.Dispose(disposing);
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}
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#endregion //end public method and overrides
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#region public property overrides
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/// <summary>
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/// 获取或设置文本框控件的边框类型。
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/// </summary>
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/// <value>The border style.</value>
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/// <PermissionSet>
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/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
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/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
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/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
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/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
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/// </PermissionSet>
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public new BorderStyle BorderStyle
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{
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get { return base.BorderStyle; }
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set
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{
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if (this.myPaintedFirstTime)
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this.SetStyle(ControlStyles.UserPaint, false);
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base.BorderStyle = value;
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if (this.myPaintedFirstTime)
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this.SetStyle(ControlStyles.UserPaint, true);
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this.myBitmap = null;
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this.myAlphaBitmap = null;
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myUpToDate = false;
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this.Invalidate();
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}
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}
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/// <summary>
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/// 获取或设置控件的背景色。
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/// </summary>
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/// <value>The color of the back.</value>
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/// <PermissionSet>
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/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
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/// </PermissionSet>
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public new Color BackColor
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{
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get
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{
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return Color.FromArgb(base.BackColor.R, base.BackColor.G, base.BackColor.B);
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}
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set
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{
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myBackColor = value;
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base.BackColor = value;
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myUpToDate = false;
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}
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}
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/// <summary>
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/// 获取或设置一个值，该值指示此控件是否为多行 <see cref="T:System.Windows.Forms.TextBox" /> 控件。
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/// </summary>
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/// <value><c>true</c> if multiline; otherwise, <c>false</c>.</value>
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/// <PermissionSet>
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/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
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/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
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/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
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/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
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/// </PermissionSet>
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public override bool Multiline
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{
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get { return base.Multiline; }
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set
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{
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if (this.myPaintedFirstTime)
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this.SetStyle(ControlStyles.UserPaint, false);
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base.Multiline = value;
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if (this.myPaintedFirstTime)
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this.SetStyle(ControlStyles.UserPaint, true);
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this.myBitmap = null;
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this.myAlphaBitmap = null;
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myUpToDate = false;
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this.Invalidate();
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}
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}
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#endregion //end public property overrides
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#region private functions and classes
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/// <summary>
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/// Gets the height of the font.
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/// </summary>
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/// <returns>System.Int32.</returns>
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private int GetFontHeight()
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{
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Graphics g = this.CreateGraphics();
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SizeF sf_font = g.MeasureString("X", this.Font);
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g.Dispose();
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return (int)sf_font.Height;
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}
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/// <summary>
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/// Gets the bitmaps.
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/// </summary>
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private void GetBitmaps()
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{
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if (myBitmap == null
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|| myAlphaBitmap == null
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|| myBitmap.Width != Width
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|| myBitmap.Height != Height
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|| myAlphaBitmap.Width != Width
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|| myAlphaBitmap.Height != Height)
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{
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myBitmap = null;
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myAlphaBitmap = null;
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}
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if (myBitmap == null)
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{
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myBitmap = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);//(Width,Height);
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myUpToDate = false;
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}
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if (!myUpToDate)
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{
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//Capture the TextBox control window
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this.SetStyle(ControlStyles.UserPaint, false);
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win32.CaptureWindow(this, ref myBitmap);
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this.SetStyle(ControlStyles.UserPaint, true);
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this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
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||
this.BackColor = Color.FromArgb(myBackAlpha, myBackColor);
|
||
|
||
}
|
||
//--
|
||
|
||
|
||
|
||
Rectangle r2 = new Rectangle(0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height);
|
||
ImageAttributes tempImageAttr = new ImageAttributes();
|
||
|
||
|
||
//Found the color map code in the MS Help
|
||
|
||
ColorMap[] tempColorMap = new ColorMap[1];
|
||
tempColorMap[0] = new ColorMap();
|
||
tempColorMap[0].OldColor = Color.FromArgb(255, myBackColor);
|
||
tempColorMap[0].NewColor = Color.FromArgb(myBackAlpha, myBackColor);
|
||
|
||
tempImageAttr.SetRemapTable(tempColorMap);
|
||
|
||
if (myAlphaBitmap != null)
|
||
myAlphaBitmap.Dispose();
|
||
|
||
|
||
myAlphaBitmap = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);//(Width,Height);
|
||
|
||
Graphics tempGraphics1 = Graphics.FromImage(myAlphaBitmap);
|
||
|
||
tempGraphics1.DrawImage(myBitmap, r2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, GraphicsUnit.Pixel, tempImageAttr);
|
||
|
||
tempGraphics1.Dispose();
|
||
|
||
//----
|
||
|
||
if (this.Focused && (this.SelectionLength == 0))
|
||
{
|
||
Graphics tempGraphics2 = Graphics.FromImage(myAlphaBitmap);
|
||
if (myCaretState)
|
||
{
|
||
//Draw the caret
|
||
Point caret = this.findCaret();
|
||
Pen p = new Pen(this.ForeColor, 3);
|
||
tempGraphics2.DrawLine(p, caret.X + 2, caret.Y + 0, caret.X + 2, caret.Y + myFontHeight);
|
||
tempGraphics2.Dispose();
|
||
}
|
||
|
||
}
|
||
|
||
|
||
|
||
}
|
||
|
||
|
||
|
||
/// <summary>
|
||
/// Finds the caret.
|
||
/// </summary>
|
||
/// <returns>Point.</returns>
|
||
private Point findCaret()
|
||
{
|
||
/* Find the caret translated from code at
|
||
* http://www.vb-helper.com/howto_track_textbox_caret.html
|
||
*
|
||
* and
|
||
*
|
||
* http://www.microbion.co.uk/developers/csharp/textpos2.htm
|
||
*
|
||
* Changed to EM_POSFROMCHAR
|
||
*
|
||
* This code still needs to be cleaned up and debugged
|
||
* */
|
||
|
||
Point pointCaret = new Point(0);
|
||
int i_char_loc = this.SelectionStart;
|
||
IntPtr pi_char_loc = new IntPtr(i_char_loc);
|
||
|
||
int i_point = win32.SendMessage(this.Handle, win32.EM_POSFROMCHAR, pi_char_loc, IntPtr.Zero);
|
||
pointCaret = new Point(i_point);
|
||
|
||
if (i_char_loc == 0)
|
||
{
|
||
pointCaret = new Point(0);
|
||
}
|
||
else if (i_char_loc >= this.Text.Length)
|
||
{
|
||
pi_char_loc = new IntPtr(i_char_loc - 1);
|
||
i_point = win32.SendMessage(this.Handle, win32.EM_POSFROMCHAR, pi_char_loc, IntPtr.Zero);
|
||
pointCaret = new Point(i_point);
|
||
|
||
Graphics g = this.CreateGraphics();
|
||
String t1 = this.Text.Substring(this.Text.Length - 1, 1) + "X";
|
||
SizeF sizet1 = g.MeasureString(t1, this.Font);
|
||
SizeF sizex = g.MeasureString("X", this.Font);
|
||
g.Dispose();
|
||
int xoffset = (int)(sizet1.Width - sizex.Width);
|
||
pointCaret.X = pointCaret.X + xoffset;
|
||
|
||
if (i_char_loc == this.Text.Length)
|
||
{
|
||
String slast = this.Text.Substring(Text.Length - 1, 1);
|
||
if (slast == "\n")
|
||
{
|
||
pointCaret.X = 1;
|
||
pointCaret.Y = pointCaret.Y + myFontHeight;
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
|
||
|
||
return pointCaret;
|
||
}
|
||
|
||
|
||
/// <summary>
|
||
/// Handles the Tick event of the myTimer1 control.
|
||
/// </summary>
|
||
/// <param name="sender">The source of the event.</param>
|
||
/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
|
||
private void myTimer1_Tick(object sender, EventArgs e)
|
||
{
|
||
//Timer used to turn caret on and off for focused control
|
||
|
||
myCaretState = !myCaretState;
|
||
myCaretUpToDate = false;
|
||
this.Invalidate();
|
||
}
|
||
|
||
|
||
/// <summary>
|
||
/// Class uPictureBox.
|
||
/// Implements the <see cref="System.Windows.Forms.PictureBox" />
|
||
/// </summary>
|
||
/// <seealso cref="System.Windows.Forms.PictureBox" />
|
||
private class uPictureBox : PictureBox
|
||
{
|
||
/// <summary>
|
||
/// Initializes a new instance of the <see cref="uPictureBox" /> class.
|
||
/// </summary>
|
||
public uPictureBox()
|
||
{
|
||
this.SetStyle(ControlStyles.Selectable, false);
|
||
this.SetStyle(ControlStyles.UserPaint, true);
|
||
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
|
||
this.SetStyle(ControlStyles.DoubleBuffer, true);
|
||
|
||
this.Cursor = null;
|
||
this.Enabled = true;
|
||
this.SizeMode = PictureBoxSizeMode.Normal;
|
||
|
||
}
|
||
|
||
|
||
|
||
|
||
//uPictureBox
|
||
/// <summary>
|
||
/// 处理 Windows 消息。
|
||
/// </summary>
|
||
/// <param name="m">要处理的 Windows<see cref="T:System.Windows.Forms.Message" />。</param>
|
||
protected override void WndProc(ref Message m)
|
||
{
|
||
if (m.Msg == win32.WM_LBUTTONDOWN
|
||
|| m.Msg == win32.WM_RBUTTONDOWN
|
||
|| m.Msg == win32.WM_LBUTTONDBLCLK
|
||
|| m.Msg == win32.WM_MOUSELEAVE
|
||
|| m.Msg == win32.WM_MOUSEMOVE)
|
||
{
|
||
//Send the above messages back to the parent control
|
||
win32.PostMessage(this.Parent.Handle, (uint)m.Msg, m.WParam, m.LParam);
|
||
}
|
||
|
||
else if (m.Msg == win32.WM_LBUTTONUP)
|
||
{
|
||
//?? for selects and such
|
||
this.Parent.Invalidate();
|
||
}
|
||
|
||
|
||
base.WndProc(ref m);
|
||
}
|
||
|
||
|
||
} // End uPictureBox Class
|
||
|
||
|
||
#endregion // end private functions and classes
|
||
|
||
|
||
#region Component Designer generated code
|
||
/// <summary>
|
||
/// Required method for Designer support - do not modify
|
||
/// the contents of this method with the code editor.
|
||
/// </summary>
|
||
private void InitializeComponent()
|
||
{
|
||
components = new System.ComponentModel.Container();
|
||
}
|
||
#endregion
|
||
|
||
|
||
#region New Public Properties
|
||
|
||
/// <summary>
|
||
/// Gets or sets the back alpha.
|
||
/// </summary>
|
||
/// <value>The back alpha.</value>
|
||
[
|
||
Category("Appearance"),
|
||
Description("The alpha value used to blend the control's background. Valid values are 0 through 255."),
|
||
Browsable(true),
|
||
DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)
|
||
|
||
]
|
||
public int BackAlpha
|
||
{
|
||
get { return myBackAlpha; }
|
||
set
|
||
{
|
||
int v = value;
|
||
if (v > 255)
|
||
v = 255;
|
||
myBackAlpha = v;
|
||
myUpToDate = false;
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
#endregion
|
||
|
||
|
||
|
||
} // End AlphaTextBox Class
|
||
} |
