Steema Central

Hi jenb,

Some time ago I've made an example for a customer that asked for something similar, if I understand well. Here it is the topic. Note that this was made for VB6 and TeeChart ActiveX. If you find problems translating it, feel free to ask here and we'll try to help you.

Hi Amol,

I'm afraid that TeeChart can only calculate automatically the axis labels while they remain proportional. In you application, the increment isn't proportional so using custom labels is the only way to achieve this I can think for now.

Hi Calou,

Wouldn't be better simply disallowing the user to delete any series?

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  TeeCommander1.ChartEditor := TChartEditor.Create(nil);
  TeeCommander1.ChartEditor.Chart := Chart1;
  TeeCommander1.ChartEditor.Options := TeeCommander1.ChartEditor.Options-[ceDelete];

Hi alexiat, Yes, you should set your bottom axis min and max manually. Here is a simple example: procedure TForm1.FormCreate(Sender: TObject); var day: TDateTime; i: Integer; begin Chart1.View3D := false; Chart1.AddSeries(TLineSeries.Create(nil)); Chart1[0].XValues.DateTime := true; (Chart1[0] as TL...

Hi KingDesigns, In v7 the property TreatNulls doesn't exist, but you can set IgnoreNulls as false and they shouldn't be displayed. As a simple example, this works fine for me with TeeChart ActiveX v7.0.1.4. Private Sub Form_Load() TChart1.Aspect.View3D = False TChart1.AddSeries scFastLine TChart1.Se...

Hi Amol, I'm not sure to understand what are you exactly trying to do here. Do you have one series assigned to both vertical axis? Or two series, one assigned to the left axis and one to the right axis? Maybe a picture would be better for us to see what is the result you expect. You can either post ...

Hi strobbekoen, I think that you should use a custom zoom. Something as follows: var Form1: TForm1; DrawRect: Boolean; XStart, XEnd, YStart, YEnd: Integer; implementation {$R *.dfm} procedure TForm1.FormCreate(Sender: TObject); begin XStart := -1; XEnd := -1; YStart := -1; YEnd := -1; DrawRect := fa...

Hi mbruch,

mbruch wrote:in Version 4 all worked fine!

Note that from v4 to v8 TeeChart has included many modifications that may cause that the same code sometimes could result in different results.

mbruch wrote:ok if I use your supplied code it works!

I'm happy to see that you could solve your issue.

Hi nbp, To place your annotation in one of the predefined positions of your chart, you could use one of the following sentences: TChart1.Tools.Items(0).asAnnotation.Position = ppCenter TChart1.Tools.Items(0).asAnnotation.Position = ppLeftBottom TChart1.Tools.Items(0).asAnnotation.Position = ppLeftTo...

Hi nbp,

I'm not able to reproduce it here but probably I'm not following the correct steps or clicking to the exact point/s. Could you try to explain the steps with more precision? Maybe using images it could be helpful.

Thanks in advance

Hi KingDesigns,

I think that you are looking for this:

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  TChart1.Series(0).asFastLine.IgnoreNulls = False
  TChart1.Series(0).asFastLine.TreatNulls = tnDontPaint

Otherwise, please, take a look at the demo at What's new ?/New in Series/Fast Line TreatNulls

Hi Sanyog, Here there is an example of how I think you could do this: public Form1() { InitializeComponent(); InitializeChart(); } Steema.TeeChart.Styles.Surface surf1; Steema.TeeChart.Tools.Annotation annotation1; private void InitializeChart() { tChart1.Aspect.Chart3DPercent = 50; chartController1...

Hi mbruch, Excuse us, we haven't noticed that you sent a project. Now, I've seen it and your problem seems different than the discussed in this thread. The problem here is that you have two series populated with different interval X values and the same X axis assigned. Then, when axis labels try to ...

Hi Onyx, Here is an example in vb6 that tries to draw a chart as in your picture: Private Sub Form_Load() With TChart1 .Aspect.View3D = False .AddSeries scGantt .Series(0).XValues.DateTime = True .Series(0).YValues.DateTime = True .Axis.Left.Labels.Style = talValue With .Series(0).asGantt .AddGanttC...

Hi jenb,

If your chart axes are longer for X values than in Y values (or reverse), the axis is auto-scaled to fit you series values. I you want the axis "proportional", you could do something similar than the demo at Welcome !\Axes\Isometric axes

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