Steema Central

Code: Select all

  public class SelectionEventArgs : EventArgs
  {
    public SelectionEventArgs(List<Series> series)
    {
      SelectedSeries = new List<Series>();
      SelectedSeries.AddRange(series);

    }
    public List<Series> SelectedSeries { get; set; }
  }

  public class SelectMultiSeries : Tool
  {
    private Keys pressedKey;
    public event EventHandler<SelectionEventArgs> PresentSelection;
    public event EventHandler<SelectionEventArgs> FinishedSelection;

    public SelectMultiSeries(Chart chart) : base(chart)
    {
      StartKey = Keys.F1;
      EndKey = Keys.F2;
      SelectedSeries = new List<Series>();
      HandleSize = 2;
    }

    public SelectMultiSeries() : this(null)
    {

    }

    public int HandleSize { get; set; }
    public Keys StartKey { get; set; }
    public Keys EndKey { get; set; }

    protected virtual void OnPresentSelection(SelectionEventArgs e)
    {
      if (PresentSelection != null)
      {
        PresentSelection(this, e);
      }
    }

    protected virtual void OnFinishedSelection(SelectionEventArgs e)
    {
      if (FinishedSelection != null)
      {
        FinishedSelection(this, e);
      }
    }

    public List<Series> SelectedSeries { get; set; }

    protected override void KeyEvent(KeyEventArgs e)
    {
      pressedKey = e.KeyCode;
      if (pressedKey == EndKey)
      {
        OnFinishedSelection(new SelectionEventArgs(this.SelectedSeries));
        SelectedSeries.Clear();
        Invalidate();
      }
    }

    private void DrawSeriesHandles(Series tmpSeries)
    {
      int t, X, Y;
      int tmpStep, tmpLast, tmpCount;

      Graphics3D g = Chart.Graphics3D;

      tmpCount = tmpSeries.LastVisibleIndex - tmpSeries.FirstVisibleIndex;
      if (tmpCount == 0) tmpCount = tmpSeries.Count;
      if (tmpCount > 20) tmpStep = tmpCount / 20;
      else tmpStep = 1;
      t = tmpSeries.FirstVisibleIndex;
      if (t == -1) t = 0;
      tmpLast = tmpSeries.LastVisibleIndex;
      if (tmpLast == -1) tmpLast = tmpSeries.Count - 1;
      while (t <= tmpLast)
      {
        tmpSeries.CalcSelectionPos(t, out X, out Y);
        g.Rectangle(RectFromPoint(X, Y), tmpSeries.MiddleZ);
        t += tmpStep;
      }
    }

    private Rectangle RectFromPoint(int X, int Y)
    {
      return Utils.FromLTRB(X - HandleSize, Y - HandleSize, X + HandleSize, Y + HandleSize);
    }

    protected override void ChartEvent(EventArgs e)
    {
      if (e is AfterDrawEventArgs)
      {
        foreach (Series s in SelectedSeries)
        {
          DrawSeriesHandles(s);
        }
      }
      else if (e is BeforeDrawEventArgs)
      {
        Chart.Parent.GetControl().Focus();
      }
    }

    protected override void MouseEvent(MouseEventKinds kind, MouseEventArgs e, ref Cursor c)
    {
      switch (kind)
      {
        case MouseEventKinds.Down:
          if (pressedKey == StartKey)
          {
            for (int i = 0; i < Chart.Series.Count; i++)
            {
              if (Chart.Series[i].Clicked(e.Location) != -1)
              {
                SelectedSeries.Add(Chart.Series[i]);
              }
            }
            OnPresentSelection(new SelectionEventArgs(this.SelectedSeries));
            Invalidate();
          }
          break;
      }
    }
  }
}

Code: Select all

    private void InitializeChart()
    {
      tChart1.Aspect.View3D = false;

      Random rnd = new Random();

      for (int i = 0; i < 10; i++)
      {
        tChart1.Series.Add(typeof(Points));
        tChart1.Series[i].Add(rnd.NextDouble(), rnd.NextDouble());
      }

      SelectMultiSeries tool = new SelectMultiSeries(tChart1.Chart);
      tool.PresentSelection += Tool_PresentSelection;
      tool.FinishedSelection += Tool_FinishedSelection;
    }

    private void Tool_FinishedSelection(object sender, SelectionEventArgs e)
    {
      string names = "";
      foreach (Series s in e.SelectedSeries)
      {
        names += s.ToString() + " ";
      }
      tChart1.Header.Text = "TeeChart";
      MessageBox.Show(names);
    }

    private void Tool_PresentSelection(object sender, SelectionEventArgs e)
    {
      string names = "";
      foreach (Series s in e.SelectedSeries)
      {
        names += s.ToString() + " ";
      }
      tChart1.Header.Text = names;
    }