mirror of
https://github.com/jie65535/Helpers.git
synced 2025-06-01 17:29:12 +08:00
391 lines
12 KiB
C#
391 lines
12 KiB
C#
using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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namespace WinForm.Controls
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{
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[ToolboxItem(true)]
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public class TextBoxXP : System.Windows.Forms.TextBox
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{
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/// <summary>
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/// 获得当前进程，以便重绘控件
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/// </summary>
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/// <param name="hWnd"></param>
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/// <returns></returns>
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[DllImport("user32.dll")]
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private static extern IntPtr GetWindowDC(IntPtr hWnd);
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[DllImport("user32.dll")]
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private static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
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private const int EM_SETCUEBANNER = 0x1501;
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
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private static extern Int32 SendMessage
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(IntPtr hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPWStr)] string lParam);
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/// <summary>
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/// 是否启用热点效果
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/// </summary>
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private bool _HotTrack = true;
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/// <summary>
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/// 边框颜色
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/// </summary>
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private Color _BorderColor = Color.FromArgb(0xFF, 0x77, 0x95);
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/// <summary>
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/// 热点边框颜色
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/// </summary>
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private Color _HotColor = Color.FromArgb(0xFF, 0x30, 0x60);
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/// <summary>
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/// 水印文本
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/// </summary>
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private string _Watermark = "";
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/// <summary>
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/// 是否鼠标MouseOver状态
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/// </summary>
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private bool _IsMouseOver = false;
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private float maximum;
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private float minimum;
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#region 属性
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/// <summary>
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/// 是否启用热点效果
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/// </summary>
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[Category("外观"),
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Description("获取或设置输入框水印文本"),
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DefaultValue("")]
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public string Watermark
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{
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get
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{
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return this._Watermark;
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}
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set
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{
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this._Watermark = value;
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SendMessage(Handle, EM_SETCUEBANNER, 0, _Watermark);
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this.Invalidate();
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}
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}
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/// <summary>
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/// 是否启用热点效果
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/// </summary>
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[Category("行为"),
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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"),
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DefaultValue(true)]
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public bool HotTrack
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{
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get
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{
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return this._HotTrack;
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}
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set
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{
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this._HotTrack = value;
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//在该值发生变化时重绘控件，下同
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//在设计模式下，更改该属性时，如果不调用该语句，
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//则不能立即看到设计试图中该控件相应的变化
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this.Invalidate();
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}
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}
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/// <summary>
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/// 边框颜色
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/// </summary>
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[Category("外观"),
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Description("获得或设置控件的边框颜色"),
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DefaultValue(typeof(Color), "#FF7795")]
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public Color BorderColor
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{
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get
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{
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return this._BorderColor;
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}
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set
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{
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this._BorderColor = value;
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this.Invalidate();
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}
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}
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/// <summary>
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/// 热点时边框颜色
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/// </summary>
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[Category("外观"),
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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"),
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DefaultValue(typeof(Color), "#F55378")]
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public Color HotColor
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{
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get
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{
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return this._HotColor;
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}
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set
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{
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this._HotColor = value;
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this.Invalidate();
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}
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}
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/// <summary>
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/// 是否只能输入数字
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/// </summary>
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[Category("行为"),
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Description("获取或设置TextBox是否只允许输入数字"),
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DefaultValue(false)]
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public bool DigitOnly { get; set; }
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/// <summary>
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/// 转为数值
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/// </summary>
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public float Number
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{
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get
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{
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if (float.TryParse(Text, out float value))
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return value;
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else
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return 0f;
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}
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}
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[Category("数据")]
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[DefaultValue(0)]
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[Description("指示小数点后位数")]
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public int DecimalPlaces { get; set; }
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[Category("数据")]
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[Description("获取或设置限制的最大值")]
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public float Maximum
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{
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get
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{
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return maximum;
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}
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set
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{
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maximum = value;
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if (minimum > maximum)
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{
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minimum = maximum;
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}
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}
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}
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[Category("数据")]
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[Description("获取或设置限制的最小值")]
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public float Minimum
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{
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get
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{
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return minimum;
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}
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set
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{
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minimum = value;
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if (minimum > maximum)
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{
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maximum = value;
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}
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}
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}
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#endregion 属性
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/// <summary>
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///
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/// </summary>
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public TextBoxXP()
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: base()
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{
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BorderStyle = BorderStyle.FixedSingle;
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Font = Styles.StaticResources.DefaultFont;
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}
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/// <summary>
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/// 鼠标移动到该控件上时
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/// </summary>
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/// <param name="e"></param>
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protected override void OnMouseMove(MouseEventArgs e)
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{
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//鼠标状态
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this._IsMouseOver = true;
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//如果启用HotTrack，则开始重绘
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//如果不加判断这里不加判断，则当不启用HotTrack，
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//鼠标在控件上移动时，控件边框会不断重绘，
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//导致控件边框闪烁。下同
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//谁有更好的办法？Please tell me , Thanks。
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if (this._HotTrack)
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{
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//重绘
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this.Invalidate();
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}
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base.OnMouseMove(e);
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}
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/// <summary>
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/// 当鼠标从该控件移开时
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/// </summary>
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/// <param name="e"></param>
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protected override void OnMouseLeave(EventArgs e)
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{
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this._IsMouseOver = false;
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if (this._HotTrack)
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{
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//重绘
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this.Invalidate();
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}
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base.OnMouseLeave(e);
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}
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/// <summary>
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/// 当该控件获得焦点时
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/// </summary>
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/// <param name="e"></param>
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protected override void OnGotFocus(EventArgs e)
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{
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if (this._HotTrack)
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{
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//重绘
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this.Invalidate();
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}
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base.OnGotFocus(e);
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}
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/// <summary>
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/// 当该控件失去焦点时
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/// </summary>
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/// <param name="e"></param>
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protected override void OnLostFocus(EventArgs e)
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{
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if (this._HotTrack)
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{
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//重绘
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this.Invalidate();
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}
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base.OnLostFocus(e);
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}
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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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// 如果只允许输入数字，则判断输入是否为退格或者数字
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if (DigitOnly)
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{
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//IsNumber：指定字符串中位于指定位置的字符是否属于数字类别
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//IsPunctuation：指定字符串中位于指定位置的字符是否属于标点符号类别
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//IsControl：指定字符串中位于指定位置的字符是否属于控制字符类别
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if (!Char.IsNumber(e.KeyChar) && !Char.IsPunctuation(e.KeyChar) && !Char.IsControl(e.KeyChar))
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{
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e.Handled = true; //获取或设置一个值，指示是否处理过System.Windows.Forms.Control.KeyPress事件
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}
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else if (Char.IsPunctuation(e.KeyChar) && DecimalPlaces > 0)
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{
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if (e.KeyChar == '.')
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{
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if (Text.LastIndexOf('.') != -1)
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{
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e.Handled = true;
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}
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}
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else
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{
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e.Handled = true;
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}
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}
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}
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}
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protected override void OnLeave(EventArgs e)
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{
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base.OnLeave(e);
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if (DigitOnly)
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{
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if (!string.IsNullOrWhiteSpace(Text))
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{
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if (Number > Maximum)
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Text = Maximum.ToString("F" + DecimalPlaces);
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if (Number < Minimum)
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Text = Minimum.ToString("F" + DecimalPlaces);
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}
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}
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}
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/// <summary>
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/// 获得操作系统消息
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/// </summary>
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/// <param name="m"></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 == 0xf || m.Msg == 0x133)
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{
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//拦截系统消息，获得当前控件进程以便重绘。
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//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.
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//所有这里并没有使用重载OnPaint方法绘制TextBox边框。
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//
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//MSDN:重写 OnPaint 将禁止修改所有控件的外观。
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//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，
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//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，
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//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，
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//则您无法通过重写此方法改变其外观。
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//
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//MSDN:要了解可用的 Message.Msg、Message.LParam 和 Message.WParam 值，
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//请参考位于 MSDN Library 中的 Platform SDK 文档参考。可在 Platform SDK（“Core SDK”一节）
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//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。
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IntPtr hDC = GetWindowDC(m.HWnd);
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if (hDC.ToInt32() == 0)
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{
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return;
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}
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//只有在边框样式为FixedSingle时自定义边框样式才有效
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if (this.BorderStyle == BorderStyle.FixedSingle)
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{
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//边框Width为1个像素
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System.Drawing.Pen pen = new Pen(this._BorderColor, 1); ;
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if (this._HotTrack)
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{
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if (this.Focused)
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{
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pen.Color = this._HotColor;
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}
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else
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{
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if (this._IsMouseOver)
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{
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pen.Color = this._HotColor;
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}
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else
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{
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pen.Color = this._BorderColor;
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}
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}
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}
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//绘制边框
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System.Drawing.Graphics g = Graphics.FromHdc(hDC);
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
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g.DrawRectangle(pen, 0, 0, this.Width - 1, this.Height - 1);
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pen.Dispose();
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}
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//返回结果
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m.Result = IntPtr.Zero;
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//释放
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ReleaseDC(m.HWnd, hDC);
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}
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}
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}
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}
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