// ***********************************************************************
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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="TextBoxEx.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.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Windows.Forms;
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namespace HZH_Controls.Controls
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{
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/// <summary>
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/// Class TextBoxEx.
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/// Implements the <see cref="System.Windows.Forms.TextBox" />
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/// </summary>
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/// <seealso cref="System.Windows.Forms.TextBox" />
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public partial class TextBoxEx : TextBox
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{
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/// <summary>
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/// The BLN focus
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/// </summary>
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private bool blnFocus = false;
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/// <summary>
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/// The prompt text
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/// </summary>
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private string _promptText = string.Empty;
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/// <summary>
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/// The prompt font
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/// </summary>
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private Font _promptFont = new Font("微软雅黑", 15f, FontStyle.Regular, GraphicsUnit.Pixel);
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/// <summary>
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/// The prompt color
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/// </summary>
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private Color _promptColor = Color.Gray;
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/// <summary>
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/// My rectangle
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/// </summary>
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private Rectangle _myRectangle = Rectangle.FromLTRB(1, 3, 1000, 3);
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/// <summary>
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/// The input type
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/// </summary>
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private TextInputType _inputType = TextInputType.NotControl;
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/// <summary>
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/// The regex pattern
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/// </summary>
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private string _regexPattern = "";
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/// <summary>
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/// The m string old value
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/// </summary>
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private string m_strOldValue = string.Empty;
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/// <summary>
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/// The maximum value
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/// </summary>
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private decimal _maxValue = 1000000m;
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/// <summary>
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/// The minimum value
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/// </summary>
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private decimal _minValue = -1000000m;
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/// <summary>
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/// The decimal length
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/// </summary>
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private int _decLength = 2;
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/// <summary>
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/// 水印文字
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/// </summary>
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/// <value>The prompt text.</value>
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[Description("水印文字"), Category("自定义")]
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public string PromptText
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{
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get
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{
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return this._promptText;
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}
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set
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{
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this._promptText = value;
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this.OnPaint(null);
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}
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}
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/// <summary>
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/// Gets or sets the prompt font.
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/// </summary>
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/// <value>The prompt font.</value>
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[Description("水印字体"), Category("自定义")]
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public Font PromptFont
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{
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get
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{
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return this._promptFont;
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}
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set
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{
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this._promptFont = value;
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}
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}
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/// <summary>
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/// Gets or sets the color of the prompt.
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/// </summary>
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/// <value>The color of the prompt.</value>
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[Description("水印颜色"), Category("自定义")]
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public Color PromptColor
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{
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get
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{
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return this._promptColor;
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}
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set
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{
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this._promptColor = value;
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}
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}
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/// <summary>
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/// Gets or sets my rectangle.
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/// </summary>
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/// <value>My rectangle.</value>
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public Rectangle MyRectangle
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{
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get;
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set;
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}
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/// <summary>
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/// Gets or sets the old text.
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/// </summary>
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/// <value>The old text.</value>
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public string OldText
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{
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get;
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set;
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}
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/// <summary>
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/// Gets or sets the type of the input.
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/// </summary>
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/// <value>The type of the input.</value>
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[Description("获取或设置一个值，该值指示文本框中的文本输入类型。")]
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public TextInputType InputType
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{
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get
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{
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return this._inputType;
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}
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set
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{
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this._inputType = value;
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if (value != TextInputType.NotControl)
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{
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TextChanged -= new EventHandler(this.TextBoxEx_TextChanged);
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TextChanged += new EventHandler(this.TextBoxEx_TextChanged);
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}
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else
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{
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TextChanged -= new EventHandler(this.TextBoxEx_TextChanged);
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}
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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，该值指示当输入类型InputType=Regex时，使用的正则表达式。
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/// </summary>
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/// <value>The regex pattern.</value>
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[Description("获取或设置一个值，该值指示当输入类型InputType=Regex时，使用的正则表达式。")]
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public string RegexPattern
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{
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get
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{
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return this._regexPattern;
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}
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set
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{
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this._regexPattern = value;
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}
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}
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/// <summary>
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/// 当InputType为数字类型时，能输入的最大值
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/// </summary>
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/// <value>The maximum value.</value>
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[Description("当InputType为数字类型时，能输入的最大值。")]
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public decimal MaxValue
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{
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get
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{
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return this._maxValue;
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}
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set
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{
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this._maxValue = value;
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}
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}
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/// <summary>
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/// 当InputType为数字类型时，能输入的最小值
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/// </summary>
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/// <value>The minimum value.</value>
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[Description("当InputType为数字类型时，能输入的最小值。")]
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public decimal MinValue
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{
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get
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{
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return this._minValue;
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}
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set
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{
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this._minValue = value;
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}
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}
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/// <summary>
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/// 当InputType为数字类型时，能输入的最小值
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/// </summary>
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/// <value>The length of the decimal.</value>
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[Description("当InputType为数字类型时，小数位数。")]
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public int DecLength
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{
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get
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{
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return this._decLength;
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}
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set
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{
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this._decLength = value;
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}
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="TextBoxEx" /> class.
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/// </summary>
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public TextBoxEx()
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{
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this.InitializeComponent();
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base.GotFocus += new EventHandler(this.TextBoxEx_GotFocus);
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base.MouseUp += new MouseEventHandler(this.TextBoxEx_MouseUp);
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base.KeyPress += TextBoxEx_KeyPress;
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}
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/// <summary>
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/// Handles the KeyPress event of the TextBoxEx control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="KeyPressEventArgs" /> instance containing the event data.</param>
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void TextBoxEx_KeyPress(object sender, KeyPressEventArgs e)
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{
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//以下代码 取消按下回车或esc的“叮”声
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if (e.KeyChar == System.Convert.ToChar(13) || e.KeyChar == System.Convert.ToChar(27))
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{
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e.Handled = true;
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}
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}
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/// <summary>
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/// Handles the MouseUp event of the TextBoxEx control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="MouseEventArgs" /> instance containing the event data.</param>
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private void TextBoxEx_MouseUp(object sender, MouseEventArgs e)
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{
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if (this.blnFocus)
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{
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base.SelectAll();
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this.blnFocus = false;
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}
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}
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/// <summary>
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/// Handles the GotFocus event of the TextBoxEx control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
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private void TextBoxEx_GotFocus(object sender, EventArgs e)
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{
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this.blnFocus = true;
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base.SelectAll();
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}
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/// <summary>
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/// Handles the TextChanged event of the TextBoxEx control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
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private void TextBoxEx_TextChanged(object sender, EventArgs e)
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{
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if (this.Text == "")
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{
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this.m_strOldValue = this.Text;
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}
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else if (this.m_strOldValue != this.Text)
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{
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if (!ControlHelper.CheckInputType(this.Text, this._inputType, this._maxValue, this._minValue, this._decLength, this._regexPattern))
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{
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int num = base.SelectionStart;
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if (this.m_strOldValue.Length < this.Text.Length)
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{
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num--;
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}
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else
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{
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num++;
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}
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base.TextChanged -= new EventHandler(this.TextBoxEx_TextChanged);
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this.Text = this.m_strOldValue;
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base.TextChanged += new EventHandler(this.TextBoxEx_TextChanged);
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if (num < 0)
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{
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num = 0;
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}
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base.SelectionStart = num;
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}
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else
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{
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this.m_strOldValue = this.Text;
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}
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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.Paint" /> 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.PaintEventArgs" />。</param>
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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if (string.IsNullOrEmpty(this.Text) && !string.IsNullOrEmpty(this._promptText))
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{
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if (e == null)
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{
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using (Graphics graphics = Graphics.FromHwnd(base.Handle))
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{
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if (this.Text.Length == 0 && !string.IsNullOrEmpty(this.PromptText))
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{
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TextFormatFlags textFormatFlags = TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter;
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if (this.RightToLeft == RightToLeft.Yes)
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{
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textFormatFlags |= (TextFormatFlags.Right | TextFormatFlags.RightToLeft);
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}
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TextRenderer.DrawText(graphics, this.PromptText, this._promptFont, base.ClientRectangle, this._promptColor, textFormatFlags);
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}
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}
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}
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}
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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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if (m.Msg == 15 || m.Msg == 7 || m.Msg == 8)
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{
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this.OnPaint(null);
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//Invalidate();
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}
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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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base.Invalidate();
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}
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}
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}
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