c#自定义进度条

有些时候我们做的程序需要进度条，而vs提供的控件不是我们想要的。先看效果图：

      进度条闪烁动画，当然背景可设为Transparent

之前想手绘进度条线条的，结果控件运行时会闪烁，所以直接用了panel控件

源码：

    [DefaultEvent("ProgressClick")]

    [ToolboxBitmap(typeof(TrackBar))]

    public partial class ProcessBar : UserControl

    {

        public ProcessBar()

        {

            //InitializeComponent();

            //this.SetStyle(ControlStyles.UserPaint, true);

            //this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);

            //this.SetStyle(ControlStyles.DoubleBuffer, true);

        }



        private int locationX=0;

        [Description("单击时X的坐标")]

        public int LocationX

        {

            get { return locationX; }

        }

   

        private int current = 0;

        [Description("当前进度")]

        public int Current

        {

            get { return current; }

            set

            {

                if (value > 232 || value < 0)

                    return;

                current = value;

                panelCurrent.Size = new Size(value, 1);

                picture.Location = new Point(value - 4, -3);

                Invalidate();

            }

        }



        private bool isPlay = false;

        [Description("是否播放")]

        public bool IsPlay

        {

            get { return isPlay; }

            set { isPlay = value; tmrCurrent.Enabled = isPlay; Invalidate(); }

        }



        public delegate void MouseHandle(object sender,EventArgs e);

        [Description("点下鼠标")]

        public event MouseHandle BarMouseDown;



        int picturetype = 0;

        private void tmrCurrent_Tick(object sender, EventArgs e)

        {

            if (picturetype == 0)

            { picture.Image = Properties.Resources.play_slider_thumb; picturetype = 1; }

            else

            { picture.Image = Properties.Resources.play_slider_thumb_animate; picturetype = 0; }

            GraphicsPath g = subGraphicsPath(picture.Image);

            if (g == null) return;

            picture.Region = new Region(g);

        }



        private unsafe static GraphicsPath subGraphicsPath(Image img)

        {

            if (img == null) return null;

            // 建立GraphicsPath, 给我们的位图路径计算使用   

            GraphicsPath g = new GraphicsPath(FillMode.Alternate);

            Bitmap bitmap = new Bitmap(img);

            int width = bitmap.Width;

            int height = bitmap.Height;

            BitmapData bmData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);

            byte* p = (byte*)bmData.Scan0;

            int offset = bmData.Stride - width * 3;

            int p0, p1, p2;         // 记录左上角0，0座标的颜色值  

            p0 = p[0];

            p1 = p[1];

            p2 = p[2];



            int start = -1;

            // 行座标 ( Y col )   

            for (int Y = 0; Y < height; Y++)

            {

                // 列座标 ( X row )   

                for (int X = 0; X < width; X++)

                {

                    if (start == -1 && (p[0] != p0 || p[1] != p1 || p[2] != p2))     //如果 之前的点没有不透明 且 不透明   

                    {

                        start = X;                            //记录这个点  

                    }

                    else if (start > -1 && (p[0] == p0 && p[1] == p1 && p[2] == p2))      //如果 之前的点是不透明 且 透明  

                    {

                        g.AddRectangle(new Rectangle(start, Y, X - start, 1));    //添加之前的矩形到  

                        start = -1;

                    }

                    if (X == width - 1 && start > -1)        //如果 之前的点是不透明 且 是最后一个点  

                    {

                        g.AddRectangle(new Rectangle(start, Y, X - start + 1, 1));      //添加之前的矩形到  

                        start = -1;

                    }

                    p += 3;                                   //下一个内存地址  

                }

                p += offset;

            } bitmap.UnlockBits(bmData);

            bitmap.Dispose();

            // 返回计算出来的不透明图片路径   

            return g;

        }



        private void panelTotal_MouseDown(object sender, MouseEventArgs e)

        {

            Current = e.Location.X;

            locationX = e.Location.X;

            if (BarMouseDown != null)

            {

                BarMouseDown.Invoke(sender, e);

            }

        }



        private void panelCurrent_MouseDown(object sender, MouseEventArgs e)

        {

            Current = e.Location.X;

            locationX = e.Location.X;

            if (BarMouseDown != null)

            {

                BarMouseDown.Invoke(sender, e);

            }

        }

    }

 

用到的素材： 

直接右键另存为图片，之所以用黑色背景是因为图片是白色的看不见，不用多说了。

提示：这里用到了unsafe关键字，需要设置项目的属性-----允许运行不安全的代码，没有设置的同学不要以为程序错了