lable axsis

[Narcís]

Hello Alex,

We did receive your e-mail and example and replied to it yesterday and today. Didn't you receive our e-mails?

Anyway, this was a bug (TF02012833) which has been fixed for the next maintenance release. In the meantime, I also suggested you a workaround that consisted on using the GetAxisLabel event. Here is the code:

Code: Select all

  public partial class Form1 : Form
  {
    private DataTable sourceTable;
    private DataColumn colXData;
    private DataColumn colYData;
    private DataColumn colColor;
    private DataColumn newC;
    private Steema.TeeChart.Styles.FastLine f;
		private Annotation anno1;
    private Steema.TeeChart.Axis axis1;
		private string[] XLabels;

    public Form1()
    {
        InitializeComponent();
        LoadDB();
				ShowGraph();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }

    private void LoadDB()
    {
      //System.DateTime
      sourceTable = new DataTable("sourceTable");
      colXData = new DataColumn("XData", Type.GetType("System.DateTime"));
      colYData = new DataColumn("YData", Type.GetType("System.String"));
      colColor = new DataColumn("Color", Type.GetType("System.Object"));
      newC = new DataColumn("newC", Type.GetType("System.Object"));

      // add colls
      sourceTable.Columns.Add(colXData);
      sourceTable.Columns.Add(colYData);
      sourceTable.Columns.Add(colColor);
      sourceTable.Columns.Add(newC);

      // fill data

      DataRow NewRow;
      int time = 100;
			int start = 100;
			int end = 130;

			long now = DateTime.Now.Ticks;

      for (int i = start; i < end; i++)
      {
        NewRow = sourceTable.NewRow();

        // NewRow["Desc"] = "Label" + i.ToString();

        NewRow["YData"] = i * i;//Math.Sin(i*2*Math.PI/360);
        NewRow["newC"] = i * 5.5f;
        if ((i % 5) == 0)
        {
            time = time + 1;
            NewRow["Color"] = Color.Red;
        }
        else
        {
            time = time + 2;
            NewRow["Color"] = Color.Blue;
        }

				DateTime next = new DateTime(now);
				next = next.AddMilliseconds(time);
				NewRow["XData"] = next;

				//string tmpDate = "11:11:11." + time;
				//XLabels[i - start] = tmpDate;
				//NewRow["XData"] = DateTime.Parse(tmpDate);
        sourceTable.Rows.Add(NewRow);
      }
    }

    private void ShowGraph()
    {
			tChart1.Panel.MarginLeft = 8;

      this.axis1 = new Steema.TeeChart.Axis(this.tChart1.Chart);

			//axis1.Increment = (double)Steema.TeeChart.DateTimeSteps.OneMillisecond; 
			axis1.StartPosition = 0;
			axis1.EndPosition = 50;
			axis1.AxisPen.Style = System.Drawing.Drawing2D.DashStyle.Solid;
			axis1.AxisPen.Color = Color.Red;
			axis1.AutomaticMaximum = true;
			axis1.AutomaticMinimum = true;
			tChart1.Axes.Custom.Add(axis1);

			//tChart1.Axes.Bottom.Labels.ValueFormat = "0.#";
			////tChart1.Axes.Bottom.Labels.Style = Steema.TeeChart.AxisLabelStyle.Value;						
			//tChart1.Axes.Bottom.Labels.Separation = 0;
			//tChart1.Axes.Bottom.Labels.DateTimeFormat = "hh:mm:ss:FFF";
			////tChart1.Axes.Bottom.Labels.Angle = 90;
			//tChart1.Axes.Bottom.Grid.Visible = false;
			////tChart1.Axes.Bottom.Increment = Steema.TeeChart.Utils.GetDateTimeStep(Steema.TeeChart.DateTimeSteps.OneMillisecond);

      tChart1.Tools.Add(anno1 = new Annotation());

			anno1.Shape.CustomPosition = true;
			anno1.Shape.Left = axis1.Position + 50;
			anno1.Shape.Top = axis1.IStartPos + 50;
			anno1.Shape.Font.Color = Color.Blue;
			anno1.Text = "ok";
			anno1.AutoSize = true;
			anno1.Shape.Transparent = true;

      f = new Steema.TeeChart.Styles.FastLine();

			f.DrawAllPoints = false;
      tChart1.Series.Add(f);          
      f.CustomVertAxis = axis1;
      f.LinePen.Width = 4;
			f.ValueFormat = "";
			//f.XValues.DateTime = true;
			f.XValues.DataMember = "XData";
			f.YValues.DataMember = "Ydata";
			// f.ColorMember = "Color";
			//f.LabelMember = "newC";
			f.DataSource = sourceTable;

			tChart1.Axes.Bottom.Labels.ValueFormat = "";
			tChart1.GetAxisLabel += new Steema.TeeChart.GetAxisLabelEventHandler(tChart1_GetAxisLabel);
    }

		void tChart1_GetAxisLabel(object sender, Steema.TeeChart.GetAxisLabelEventArgs e)
		{
			if (sender == tChart1.Axes.Bottom)
			{
				DateTime dt = DateTime.FromOADate(Convert.ToDouble(e.LabelText));
				dt.Millisecond.ToString();
				e.LabelText = dt.ToLongTimeString() + ":" + dt.Millisecond.ToString();
			}
		}

  }

[Marian]

Hi Alex,
I use Teechart Java version. My experience with it is that if you plot a bigger number of points, changing chart's background grid from dashed to solid or removing it helps speed of panning and zooming a lot.
Hope it will be of some use for you as well.
Marian

[Alain Bolduc]

Hi Narcís!

Is there a way to display text (like units) on axis label but using value for the graphic?

Here an exemple of what I would like to do :

Code: Select all

 dB -|
     |
  4 -|
     |
  2 -|
      ----------------------
      0   1    2   3   4   km

Thanks, bye!

[Narcís]

Hi Qwerty,

I'm not 100% sure of what you are trying to achieve. I can think of several options here:

1. Use axis titles for that, for example:

Code: Select all

			tChart1.Axes.Left.Title.Text = "dB";

2. Populate series with the labels you'd like to be plotted, eg.:

Code: Select all

		public Form1()
		{
			InitializeComponent();
			InitializeChart();
		}

		private void InitializeChart()
		{
			Steema.TeeChart.Styles.Line line1 = new Steema.TeeChart.Styles.Line(tChart1.Chart);

			int i;

			for (i = 0; i < 10; i++)
			{
				line1.Add(i, i, i.ToString());
			}

			line1.Add(i, i, "dB");

			tChart1.Axes.Left.Labels.Style = Steema.TeeChart.AxisLabelStyle.Text;
			tChart1.Axes.Bottom.Labels.Style = Steema.TeeChart.AxisLabelStyle.Text;

			tChart1.GetAxisLabel += new Steema.TeeChart.GetAxisLabelEventHandler(tChart1_GetAxisLabel);
		}

		void tChart1_GetAxisLabel(object sender, Steema.TeeChart.GetAxisLabelEventArgs e)
		{
			if ((sender == tChart1.Axes.Bottom) && (e.ValueIndex == tChart1[0].Count - 1))
			{
				e.LabelText = "km";
			}
		}

3. Use custom axis labels as shown in the All Features\Welcome !\Axes\Labels\Custom labels example at the features demo available at TeeChart's program group.

If this doesn't help don't hesitate to let us know.

[Narcís]

Hello Alex,

We have been investigating TF02012833 and found that it is not a bug. Using code below works fine, commented out line was the one causing the problem.

Code: Select all

		public Form1()
		{
			InitializeComponent();
			InitializeChart();
		}

		private void InitializeChart()
		{
			tChart1.Aspect.View3D = true;
			Steema.TeeChart.Styles.FastLine fastLine1 = new Steema.TeeChart.Styles.FastLine(tChart1.Chart);

			DateTime now = new DateTime(DateTime.Now.Ticks);

			for (int i = 0; i < 45; i++)
			{
				fastLine1.Add(now.AddMilliseconds(i).ToOADate(), i);
			}

			fastLine1.XValues.DateTime = true;
			tChart1.Axes.Bottom.Increment = Steema.TeeChart.Utils.GetDateTimeStep(Steema.TeeChart.DateTimeSteps.OneMillisecond);
			//tChart1.Axes.Bottom.Increment = (double)(Steema.TeeChart.DateTimeSteps.OneMillisecond);
			tChart1.Axes.Bottom.Labels.Angle = 90;
		}