imagebutton.cs

用C#写的USB数据采集程序

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace Custom
{
	/// <summary>
	/// 图形按钮
	/// </summary>
	public sealed class ImageButton : Control
    {
        #region "属性"

        #region "受保护的属性"
        /// <summary>
		/// 按钮上的图像
		/// </summary>
        private Image _image;
		/// <summary>
		/// 记录按钮是否按下
		/// </summary>
		private bool bPushed; 
		/// <summary>
		/// 透明点x位置
		/// </summary>
		private int _x;
		/// <summary>
		/// 透明点y位置
		/// </summary>
		private int _y;
		/// <summary>
		/// 背景颜色
		/// </summary>
		private Color _backgroundcolor;
		/// <summary>
		/// 前景颜色
		/// </summary>
		private Color _fillcolor;
        /// <summary>
        /// 线条颜色
        /// </summary>
        private Color _linecolor;
        /// <summary>
        /// 阴影颜色
        /// </summary>
        private Color _shadowcolor;
        /// <summary>
        /// 按钮区域点
        /// </summary>
        private Point[] _p;
        /// <summary>
        /// 阴影显示
        /// </summary>
        private bool _showshadow;
        /// <summary>
        /// 图像定位方式
        /// </summary>
        private PictureBoxSizeMode _sizemode;
        /// <summary>
        /// 屏幕绘图对象
        /// </summary>
        private Graphics _screen;
        /// <summary>
        /// 提示条定位方式
        /// </summary>
        private TipAnchorStyles _tipanchor;
        #endregion

        #region "公共属性"

        #region "图像"
        /// <summary>
		/// 获取或设置按钮的图像
		/// </summary>
		public Image Image
		{
			get
			{
				return _image;
			}
			set
			{
				_image = value;
				Invalidate();
			}
        }
        #endregion

        #region "背景色"
        /// <summary>
		/// 获取或设置背景色
		/// </summary>
        public override Color BackColor
        {
            get
            {
                return base.BackColor;
            }
            set
            {
                base.BackColor = value;
                _backgroundcolor = value;
                Invalidate();
            }
        }

        #endregion

        #region "前景色"
        /// <summary>
		/// 获取或设置前景色
		/// </summary>
		public Color FillColor
		{
			get
			{
				return _fillcolor; 
			}
			set
			{
				_fillcolor = value;
                Invalidate();
			}
        }
        #endregion

        #region "线条色"
        /// <summary>
        /// 获取或设置线条色
        /// </summary>
        public Color LineColor
        {
            get
            {
                return _linecolor;
            }
            set
            {
                _linecolor = value;
                Invalidate();
            }
        }
        #endregion

        #region "阴影色"
        /// <summary>
        /// 获取或设置阴影色
        /// </summary>
        public Color ShadowColor
        {
            get
            {
                return _shadowcolor;
            }
            set
            {
                _shadowcolor = value;
                Invalidate();
            }
        }
        #endregion

        #region "是否显示阴影"
        /// <summary>
        /// 是否显示阴影
        /// </summary>
        public bool ShowShadow
        {
            get
            {
                return _showshadow;
            }
            set
            {
                _showshadow = value;
                if (_showshadow)
                {
                    _p[0].X = 0;
                    _p[0].Y = 2;
                    _p[1].X = 2;
                    _p[1].Y = 0;
                    _p[2].X = Width - 6;
                    _p[2].Y = 0;
                    _p[3].X = Width - 4;
                    _p[3].Y = 2;
                    _p[4].X = Width - 4;
                    _p[4].Y = Height - 6;
                    _p[5].X = Width - 6;
                    _p[5].Y = Height - 4;
                    _p[6].X = 2;
                    _p[6].Y = Height - 4;
                    _p[7].X = 0;
                    _p[7].Y = Height - 6;
                }
                else
                {
                    _p[0].X = 0;
                    _p[0].Y = 2;
                    _p[1].X = 2;
                    _p[1].Y = 0;
                    _p[2].X = Width - 3;
                    _p[2].Y = 0;
                    _p[3].X = Width - 1;
                    _p[3].Y = 2;
                    _p[4].X = Width - 1;
                    _p[4].Y = Height - 3;
                    _p[5].X = Width - 3;
                    _p[5].Y = Height - 1;
                    _p[6].X = 2;
                    _p[6].Y = Height - 1;
                    _p[7].X = 0;
                    _p[7].Y = Height - 3;
                }
                this.Invalidate();
            }
        }
	
        #endregion

        #region "背景像素点"
        /// <summary>
        /// 获取或设置背景像素点
        /// </summary>
        public Point BackgroundPoint
        {
            get
            {
                return new Point(_x, _y);
            }
            set
            {
                _x = value.X;
                _y = value.Y;
                Invalidate();
            }
        }
        #endregion

        #region "图像定位方式"
        /// <summary>
        /// 获取或设置图像在按钮中的定位方式
        /// </summary>
        public PictureBoxSizeMode SizeMode
        {
            get
            {
                return _sizemode;
            }
            set
            {
                _sizemode = value;
                this.Invalidate();
            }
        }
        #endregion

        #region "提示条定位方式"
        /// <summary>
        /// 获取或设置提示条的定位方式
        /// </summary>
        public TipAnchorStyles TipAnchor
        {
            get
            {
                return _tipanchor;
            }
            set
            {
                _tipanchor = value;
                this.Invalidate();
            }
        }
        #endregion

        #region "屏幕绘图对象"
        /// <summary>
        /// 设置屏幕绘图对象
        /// </summary>
        public Graphics Screen
        {
            set
            {
                _screen = value;
            }
        }
        #endregion

        #endregion

        #endregion

        #region "构造函数"
        /// <summary>
		/// 构造函数
		/// </summary>
		public ImageButton()
		{
			bPushed = false;
			_x = 0;
			_y = 0;
            _fillcolor = Color.White;
            _linecolor = Color.FromArgb((int)(_fillcolor.R * 0.5), (int)(_fillcolor.G * 0.5), (int)(_fillcolor.B * 0.5));
            _shadowcolor = Color.Gray;
            _p = new Point[8];
            _showshadow = false;
            Image = null;
            _sizemode = PictureBoxSizeMode.StretchImage;
            _tipanchor = TipAnchorStyles.Bottom;
			Size = new Size(16, 16);
        }
        #endregion

        #region "方法"

        #region "受保护的方法"

        #region "尺寸改变"
        /// <summary>
        /// 尺寸改变
        /// </summary>
        /// <param name="e"></param>
        protected override void OnResize(EventArgs e)
        {