panelpro.cs

用C#写的USB数据采集程序

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Custom
{
    public partial class PanelPro : Panel
    {
        #region "构造函数"
        /// <summary>
        /// 构造函数
        /// </summary>
        public PanelPro()
        {
            InitializeComponent();
            this.Image = null;
            this.Caption = this.Name;
            this.TextAlign = ContentAlignment.TopLeft;
            this.SizeMode = PictureBoxSizeMode.Normal;
            this.TextFont = new Font(FontFamily.GenericSerif, 9, FontStyle.Regular);
            this.TextColor = Color.Black;
            _p = new Pen(Color.Black);
        }
        #endregion

        #region "属性"

        #region "受保护的属性"
        /// <summary>
        /// 文字
        /// </summary>
        private string _text;
        /// <summary>
        /// 文字对齐方式
        /// </summary>
        private ContentAlignment _textalign;
        /// <summary>
        /// 图像
        /// </summary>
        private Image _image;
        /// <summary>
        /// 图像显示方式
        /// </summary>
        private PictureBoxSizeMode _sizemode;
        /// <summary>
        /// 字体
        /// </summary>
        private Font _font;
        /// <summary>
        /// 前景色
        /// </summary>
        private Color _forecolor;
        /// <summary>
        /// 边框笔
        /// </summary>
        private Pen _p;
        /// <summary>
        /// 文字刷
        /// </summary>
        private Brush _b;
        #endregion

        #region "公共属性"

        #region "文字"
        /// <summary>
        /// 获取或设置显示的文字
        /// </summary>
        public string Caption
        {
            get { return _text; }
            set
            {
                _text = value;
                this.Invalidate();
            }
        }
        #endregion

        #region "字体"
        /// <summary>
        /// 获取或设置字体
        /// </summary>
        public Font TextFont
        {
            get { return _font; }
            set
            {
                _font = value;
                this.Invalidate();
            }
        }
        #endregion

        #region "前景色"
        /// <summary>
        /// 获取或设置前景色
        /// </summary>
        public Color TextColor
        {
            get { return _forecolor; }
            set
            {
                _forecolor = value;
                if (_b != null)
                {
                    _b.Dispose();
                }
                _b = new SolidBrush(_forecolor);
                this.Invalidate();
            }
        }
        #endregion

        #region "文字对齐方式"
        /// <summary>
        /// 获取或设置文字对齐方式
        /// </summary>
        public ContentAlignment TextAlign
        {
            get { return _textalign; }
            set
            {
                _textalign = value;
                this.Invalidate();
            }
        }
        #endregion

        #region "图像"
        /// <summary>
        /// 获取或设置显示的图像
        /// </summary>
        public Image Image
        {
            get { return _image; }
            set
            {
                _image = value;
                this.Invalidate();
            }
        }
        #endregion

        #region "图像显示方式"
        /// <summary>
        /// 获取或设置图像显示方式
        /// </summary>
        public PictureBoxSizeMode SizeMode
        {
            get { return _sizemode; }
            set
            {
                _sizemode = value;
                this.Invalidate();
            }
        }
        #endregion

        #endregion

        #endregion

        #region "方法"

        #region "受保护的方法"

        #region "绘图"
        /// <summary>
        /// 重载绘图
        /// </summary>
        /// <param name="pe"></param>
        protected override void OnPaint(PaintEventArgs pe)
        {
            //画边框
            using (Pen p = new Pen(Color.Black))
            {
                pe.Graphics.DrawRectangle(p, new Rectangle(0, 0, Width - 1, Height - 1));
            }

            //画图像    
            if (_image != null)
            {
                Rectangle r;
                switch (_sizemode)
                {
                    case PictureBoxSizeMode.CenterImage:
                        r = new Rectangle(1 + (Width - 2 - _image.Width) / 2, 1 + (Height - 2 - _image.Height) / 2, _image.Width, _image.Height);
                        break;
                    case PictureBoxSizeMode.Normal:
                        r = new Rectangle(1, 1, _image.Width, _image.Height);
                        break;
                    case PictureBoxSizeMode.StretchImage:
                        r = new Rectangle(1, 1, Width - 2, Height - 2);
                        break;
                    default:
                        r = new Rectangle(1, 1, _image.Width, _image.Height);
                        break;
                }
                pe.Graphics.DrawImage(_image, r, new Rectangle(0, 0, _image.Width, _image.Height), GraphicsUnit.Pixel);
            }

            //画文字
            if (_text.Length > 0)
            {
                switch (_textalign)
                {
                    case ContentAlignment.TopCenter:
                        pe.Graphics.DrawString(_text, _font, _b, (Width - 2 - pe.Graphics.MeasureString(_text, _font).Width) / 2, (Height - 2 - pe.Graphics.MeasureString(_text, _font).Height) / 2);
                        break;
                    case ContentAlignment.TopLeft:
                        pe.Graphics.DrawString(_text, _font, _b, 1, (Height - 2 - pe.Graphics.MeasureString(_text, _font).Height) / 2);
                        break;
                    case ContentAlignment.TopRight:
                        pe.Graphics.DrawString(_text, _font, _b, Width - 2 - pe.Graphics.MeasureString(_text, _font).Width, (Height - 2 - pe.Graphics.MeasureString(_text, _font).Height) / 2);
                        break;
                    default:
                        pe.Graphics.DrawString(_text, _font, _b, 1, (Height - 2 - pe.Graphics.MeasureString(_text, _font).Height) / 2);
                        break;
                }
            }

            // 调用基类 OnPaint
            base.OnPaint(pe);
        }
        #endregion

        #endregion

        #endregion
    }
}