TScrollPager in XE6

[Metman]

If I try to add a scrollpager tool to the chart it fails to work. If I do dynamically as in the code in the demo it works.

I don't want to initialise the component in code every time - I would like to do by design in the IDE.

I must be missing something.

This is the code:

Code: Select all

procedure TForm1.FormCreate(Sender: TObject);
begin
  Series1.FillSampleValues(1000);

  ScrollPagerTool:=TScrollPagerTool.Create(Self);
  ScrollPagerTool.ParentChart:=Chart1;
  ScrollPagerTool.SubChartTChart.Frame.Visible:=False;
  ScrollPagerTool.ColorBandTool.StartLine.Active:=True;
  ScrollPagerTool.ColorBandTool.EndLine.Active:=True;
  ScrollPagerTool.AddSeries(Chart1[0]);


  LineSeries1.FillSampleValues(1000);
end;

Capture4.png (59.76 KiB) Viewed 8862 times

Bruce.

[Yeray]

Hi Bruce,

I can't reproduce this at design time with TeeChart v2014.11 in a RAD XE6 Delphi VCL project.
Could you please arrange a simple example project we can run as-is to reproduce the problem here?
Thanks in advance.

[Metman]

Yeray

I have zipped the test project and attached it. The chart on the left that I create the ScrollPagerTool dynamically works fine. The on on the right fails to show a graph in the sub-chart.

Should Chart2 show a reference to Chart1 as it does here?

Capture1.png (53.44 KiB) Viewed 8843 times

I have all sorts of issues when trying to add a scrollpager tool and it has sent back a lot of error to your faults server. Some times this fails and I can't clear an exception without killing XE6 and restarting.

Bruce.

[Yeray]

Hello Bruce,

I have zipped the test project and attached it. The chart on the left that I create the ScrollPagerTool dynamically works fine. The on on the right fails to show a graph in the sub-chart.

Can't see any zip attached. Can you please try it again?

Should Chart2 show a reference to Chart1 as it does here?

I see your main chart is called Chart2. When you create a TScrollPagerTool, a TSubChartTool with a TChart is internally created. And the TChart created internally takes the name Chart1, yes, that's normal.
However, since you can access the chart in the TSubChartTool through the TScrollPagerTool, I think we could hide the TSubChartTool from the list of tools.

I have all sorts of issues when trying to add a scrollpager tool and it has sent back a lot of error to your faults server. Some times this fails and I can't clear an exception without killing XE6 and restarting.

I'm trying to reproduce this here. It would be helpful if you could check the attachment mentioned above so we can reproduce the problems here.

Thanks in advance.

[Metman]

Hi Yeray

Hopefully it stays attached this time!

Bruce.

[Yeray]

Hi Bruce,

I think I see what is happening.
In your Chart2, where the TScrollPagerTool has been placed at design time, the series linked to it has 25 values, and note this tool sets its default ColorBand Start and End values according to the values in the series linked at the moment of the linkage is being done. Then, you are setting the series to have 1000 values, but the tool has already been initialized, so it isn't reinitialized again after changing the series values.

When I run your test application, I see the image below. The ColorBand in the right chart (Chart2) is present. It's just that it goes from 8 to 16 in an axis scale from 0 to 1000. So the whole ColorBand is in the left of the chart, where you see an arrow:

2014-05-21_1018.png (73.67 KiB) Viewed 8813 times

You can drag the ColorBand and see how the chart above changes.

2014-05-21_1019.png (79.75 KiB) Viewed 8812 times

[Metman]

Hi Yeray

Yes, I can see whats happening now - thanks a lot for making that clear!

Bruce.