C#自定義音樂播放器進度條

更新時間：2017年07月19日 15:58:56 作者：波谷

這篇文章主要為大家詳細介紹了C#自定義音樂播放器進度條效果，具有一定的參考價值，感興趣的小伙伴們可以參考一下

有些時候我們做的程序需要進度條，而vs提供的控件不是我們想要的。先看效果圖：

進度條閃爍動畫，當然背景可設為Transparent

之前想手繪進度條線條的，結果控件運行時會閃爍，所以直接用了panel控件

源碼：

[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("單擊時X的坐標")]
    public int LocationX
    {
      get { return locationX; }
    }
  
    private int current = 0;
    [Description("當前進度")]
    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("點下鼠標")]
    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, 給我們的位圖路徑計算使用  
      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;     // 記錄左上角0，0座標的顏色值 
      p0 = p[0];
      p1 = p[1];
      p2 = p[2];

      int start = -1;
      // 行座標 ( Y col )  
      for (int Y = 0; Y < height; Y++)
      {
        // 列座標 ( X row )  
        for (int X = 0; X < width; X++)
        {
          if (start == -1 && (p[0] != p0 || p[1] != p1 || p[2] != p2))   //如果 之前的點沒有不透明 且 不透明  
          {
            start = X;              //記錄這個點 
          }
          else if (start > -1 && (p[0] == p0 && p[1] == p1 && p[2] == p2))   //如果 之前的點是不透明 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 之前的點是不透明 且 是最后一個點 
          {
            g.AddRectangle(new Rectangle(start, Y, X - start + 1, 1));   //添加之前的矩形到 
            start = -1;
          }
          p += 3;                  //下一個內(nèi)存地址 
        }
        p += offset;
      } bitmap.UnlockBits(bmData);
      bitmap.Dispose();
      // 返回計算出來的不透明圖片路徑  
      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：