Add TextBoxXP.cs

WinForm/Controls/TextBoxXP.cs

@@ -0,0 +1,390 @@
+using System;
+using System.ComponentModel;
+using System.Drawing;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+
+namespace JumperPelvicFloorTraining.MyControls
+{
+    [ToolboxItem(true)]
+    public class TextBoxXP : System.Windows.Forms.TextBox
+    {
+        /// <summary>
+        /// 获得当前进程，以便重绘控件
+        /// </summary>
+        /// <param name="hWnd"></param>
+        /// <returns></returns>
+        [DllImport("user32.dll")]
+        private static extern IntPtr GetWindowDC(IntPtr hWnd);
+
+        [DllImport("user32.dll")]
+        private static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
+
+        private const int EM_SETCUEBANNER = 0x1501;
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto)]
+        private static extern Int32 SendMessage
+          (IntPtr hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPWStr)] string lParam);
+
+        /// <summary>
+        /// 是否启用热点效果
+        /// </summary>
+        private bool _HotTrack = true;
+
+        /// <summary>
+        /// 边框颜色
+        /// </summary>
+        private Color _BorderColor = Color.FromArgb(0xFF, 0x77, 0x95);
+
+        /// <summary>
+        /// 热点边框颜色
+        /// </summary>
+        private Color _HotColor = Color.FromArgb(0xFF, 0x30, 0x60);
+
+        /// <summary>
+        /// 水印文本
+        /// </summary>
+        private string _Watermark = "";
+
+        /// <summary>
+        /// 是否鼠标MouseOver状态
+        /// </summary>
+        private bool _IsMouseOver = false;
+
+        private float maximum;
+        private float minimum;
+
+        #region 属性
+
+        /// <summary>
+        /// 是否启用热点效果
+        /// </summary>
+        [Category("外观"),
+         Description("获取或设置输入框水印文本"),
+         DefaultValue("")]
+        public string Watermark
+        {
+            get
+            {
+                return this._Watermark;
+            }
+            set
+            {
+                this._Watermark = value;
+                SendMessage(Handle, EM_SETCUEBANNER, 0, _Watermark);
+                this.Invalidate();
+            }
+        }
+
+        /// <summary>
+        /// 是否启用热点效果
+        /// </summary>
+        [Category("行为"),
+         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"),
+         DefaultValue(true)]
+        public bool HotTrack
+        {
+            get
+            {
+                return this._HotTrack;
+            }
+            set
+            {
+                this._HotTrack = value;
+                //在该值发生变化时重绘控件，下同
+                //在设计模式下，更改该属性时，如果不调用该语句，
+                //则不能立即看到设计试图中该控件相应的变化
+                this.Invalidate();
+            }
+        }
+
+        /// <summary>
+        /// 边框颜色
+        /// </summary>
+        [Category("外观"),
+         Description("获得或设置控件的边框颜色"),
+         DefaultValue(typeof(Color), "#FF7795")]
+        public Color BorderColor
+        {
+            get
+            {
+                return this._BorderColor;
+            }
+            set
+            {
+                this._BorderColor = value;
+                this.Invalidate();
+            }
+        }
+
+        /// <summary>
+        /// 热点时边框颜色
+        /// </summary>
+        [Category("外观"),
+         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"),
+         DefaultValue(typeof(Color), "#F55378")]
+        public Color HotColor
+        {
+            get
+            {
+                return this._HotColor;
+            }
+            set
+            {
+                this._HotColor = value;
+                this.Invalidate();
+            }
+        }
+
+        /// <summary>
+        /// 是否只能输入数字
+        /// </summary>
+        [Category("行为"),
+         Description("获取或设置TextBox是否只允许输入数字"),
+         DefaultValue(false)]
+        public bool DigitOnly { get; set; }
+
+        /// <summary>
+        /// 转为数值
+        /// </summary>
+        public float Number
+        {
+            get
+            {
+                if (float.TryParse(Text, out float value))
+                    return value;
+                else
+                    return 0f;
+            }
+        }
+
+        [Category("数据")]
+        [DefaultValue(0)]
+        [Description("指示小数点后位数")]
+        public int DecimalPlaces { get; set; }
+
+        [Category("数据")]
+        [Description("获取或设置限制的最大值")]
+        public float Maximum
+        {
+            get
+            {
+                return maximum;
+            }
+            set
+            {
+                maximum = value;
+                if (minimum > maximum)
+                {
+                    minimum = maximum;
+                }
+            }
+        }
+
+        [Category("数据")]
+        [Description("获取或设置限制的最小值")]
+        public float Minimum
+        {
+            get
+            {
+                return minimum;
+            }
+            set
+            {
+                minimum = value;
+                if (minimum > maximum)
+                {
+                    maximum = value;
+                }
+            }
+        }
+
+        #endregion 属性
+
+        /// <summary>
+        ///
+        /// </summary>
+        public TextBoxXP()
+            : base()
+        {
+            BorderStyle = BorderStyle.FixedSingle;
+            Font = Styles.StaticResources.DefaultFont;
+        }
+
+        /// <summary>
+        /// 鼠标移动到该控件上时
+        /// </summary>
+        /// <param name="e"></param>
+        protected override void OnMouseMove(MouseEventArgs e)
+        {
+            //鼠标状态
+            this._IsMouseOver = true;
+            //如果启用HotTrack，则开始重绘
+            //如果不加判断这里不加判断，则当不启用HotTrack，
+            //鼠标在控件上移动时，控件边框会不断重绘，
+            //导致控件边框闪烁。下同
+            //谁有更好的办法？Please tell me , Thanks。
+            if (this._HotTrack)
+            {
+                //重绘
+                this.Invalidate();
+            }
+            base.OnMouseMove(e);
+        }
+
+        /// <summary>
+        /// 当鼠标从该控件移开时
+        /// </summary>
+        /// <param name="e"></param>
+        protected override void OnMouseLeave(EventArgs e)
+        {
+            this._IsMouseOver = false;
+
+            if (this._HotTrack)
+            {
+                //重绘
+                this.Invalidate();
+            }
+            base.OnMouseLeave(e);
+        }
+
+        /// <summary>
+        /// 当该控件获得焦点时
+        /// </summary>
+        /// <param name="e"></param>
+        protected override void OnGotFocus(EventArgs e)
+        {
+            if (this._HotTrack)
+            {
+                //重绘
+                this.Invalidate();
+            }
+            base.OnGotFocus(e);
+        }
+
+        /// <summary>
+        /// 当该控件失去焦点时
+        /// </summary>
+        /// <param name="e"></param>
+        protected override void OnLostFocus(EventArgs e)
+        {
+            if (this._HotTrack)
+            {
+                //重绘
+                this.Invalidate();
+            }
+            base.OnLostFocus(e);
+        }
+
+        protected override void OnKeyPress(KeyPressEventArgs e)
+        {
+            base.OnKeyPress(e);
+            // 如果只允许输入数字，则判断输入是否为退格或者数字
+            if (DigitOnly)
+            {
+                //IsNumber：指定字符串中位于指定位置的字符是否属于数字类别
+                //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
+                //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
+                if (!Char.IsNumber(e.KeyChar) && !Char.IsPunctuation(e.KeyChar) && !Char.IsControl(e.KeyChar))
+                {
+                    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
+                }
+                else if (Char.IsPunctuation(e.KeyChar) && DecimalPlaces > 0)
+                {
+                    if (e.KeyChar == '.')
+                    {
+                        if (Text.LastIndexOf('.') != -1)
+                        {
+                            e.Handled = true;
+                        }
+                    }
+                    else
+                    {
+                        e.Handled = true;
+                    }
+                }
+            }
+        }
+
+        protected override void OnLeave(EventArgs e)
+        {
+            base.OnLeave(e);
+
+            if (DigitOnly)
+            {
+                if (!string.IsNullOrWhiteSpace(Text))
+                {
+                    if (Number > Maximum)
+                        Text = Maximum.ToString("F" + DecimalPlaces);
+                    if (Number < Minimum)
+                        Text = Minimum.ToString("F" + DecimalPlaces);
+                }
+            }
+        }
+
+        /// <summary>
+        /// 获得操作系统消息
+        /// </summary>
+        /// <param name="m"></param>
+        protected override void WndProc(ref Message m)
+        {
+            base.WndProc(ref m);
+            if (m.Msg == 0xf || m.Msg == 0x133)
+            {
+                //拦截系统消息，获得当前控件进程以便重绘。
+                //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.
+                //所有这里并没有使用重载OnPaint方法绘制TextBox边框。
+                //
+                //MSDN:重写 OnPaint 将禁止修改所有控件的外观。
+                //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，
+                //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，
+                //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，
+                //则您无法通过重写此方法改变其外观。
+                //
+                //MSDN:要了解可用的 Message.Msg、Message.LParam 和 Message.WParam 值，
+                //请参考位于 MSDN Library 中的 Platform SDK 文档参考。可在 Platform SDK（“Core SDK”一节）
+                //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。
+                IntPtr hDC = GetWindowDC(m.HWnd);
+                if (hDC.ToInt32() == 0)
+                {
+                    return;
+                }
+
+                //只有在边框样式为FixedSingle时自定义边框样式才有效
+                if (this.BorderStyle == BorderStyle.FixedSingle)
+                {
+                    //边框Width为1个像素
+                    System.Drawing.Pen pen = new Pen(this._BorderColor, 1); ;
+
+                    if (this._HotTrack)
+                    {
+                        if (this.Focused)
+                        {
+                            pen.Color = this._HotColor;
+                        }
+                        else
+                        {
+                            if (this._IsMouseOver)
+                            {
+                                pen.Color = this._HotColor;
+                            }
+                            else
+                            {
+                                pen.Color = this._BorderColor;
+                            }
+                        }
+                    }
+                    //绘制边框
+                    System.Drawing.Graphics g = Graphics.FromHdc(hDC);
+                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
+                    g.DrawRectangle(pen, 0, 0, this.Width - 1, this.Height - 1);
+                    pen.Dispose();
+                }
+                //返回结果
+                m.Result = IntPtr.Zero;
+                //释放
+                ReleaseDC(m.HWnd, hDC);
+            }
+        }
+    }
+}