using System;
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using System.Collections.Generic;
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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 DPumpHydr.WinFrmUI.WenSkin.Controls
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{
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public class WenTextBox : TextBox
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{
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public WenTextBox() : base()
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{
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this.BackColor = Color.FromArgb(37, 37, 38);
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this.ForeColor = Color.White;
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this.BorderStyle = BorderStyle.FixedSingle;
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}
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#region 私有属性
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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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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(0xA7, 0xA6, 0xAA);
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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(0x33, 0x5E, 0xA8);
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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 string wateText;
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public bool stateComDown = false;
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#endregion
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#region 公有属性
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[Category("Wen"), Description("是否开启下拉搜索框"), DefaultValue(false)]
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public bool StateComDown
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{
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get => stateComDown;
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set
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{
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if (value)
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{
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this.AutoCompleteSource = System.Windows.Forms.AutoCompleteSource.CustomSource;
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this.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.SuggestAppend;
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}
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stateComDown = value;
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}
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}
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[Category("Wen"), Description("当文本类容为空的时候提示内容"), DefaultValue(null)]
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public string WateText { get => wateText; set { wateText = value; this.Invalidate(); } }
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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 => this.hotTrack;
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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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/// 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), "#335EA8")]
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public Color HotColor { get => this.hotColor; set { this.hotColor = value; this.Invalidate(); } }
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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"), Description("获得或设置控件的边框颜色"), DefaultValue(typeof(Color), "#A7A6AA")]
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public Color BorderColor { get => this.borderColor; set { this.borderColor = value; this.Invalidate(); } }
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#endregion
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#region 重写是鼠标事件
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protected override void OnMouseLeave(EventArgs e)
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{
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base.OnMouseLeave(e);
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isMouseOver = false;
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}
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protected override void OnMouseEnter(EventArgs e)
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{
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base.OnMouseEnter(e);
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isMouseOver = true;
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}
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#endregion
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#region 重写属性
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public new bool ReadOnly
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{
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get => base.ReadOnly;
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set
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{
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base.ReadOnly = value;
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if (value)
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{
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this.BackColor = Color.FromArgb(100, 100, 100);
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}
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else
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this.BackColor = Color.FromArgb(37, 37, 37);
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this.Invalidate();
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}
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}
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#endregion
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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 = WinApi.WindowsAPI.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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using (Graphics g = Graphics.FromHdc(hDC).SetGDIHigh())
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{
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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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using 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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g.DrawRectangle(pen, 0, 0, this.Width - 1, this.Height - 1);
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}
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//当文本为空，提示文本不为空，水印TextBox
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if (string.IsNullOrEmpty(Text) && string.IsNullOrEmpty(WateText))
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{
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using Brush b = new SolidBrush(Color.FromArgb(153, 153, 153));
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g.DrawString(WateText, this.Font, b, new Rectangle(0, 0, Width, this.Height), ControlHelper.StringConters);
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}
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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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WinApi.WindowsAPI.ReleaseDC(m.HWnd, hDC);
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}
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}
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}
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}
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