Dynamic TeeCharts

rbuser

Due to the nature of the report i have to create the chart dynamically, as i
do not know how many will be needed.
This is my PassTrough function, no errors are occuring but nothign is
visible, and i'm sure that the function print, as the 'Version1', with is on
the page before uses the same code to 'plot' values.
Are there other values that have to be set execpt the Band ??


procedure TSdwRapTeeChartActualVsBudget2Function.ExecuteFunction(aParams:
TraParamList);
var
CompId : String;
LstItm : Integer;
aPipLine : TppDataPipeLine;
aBand : TppBand;
aChart : TppTeeChart;
aSeries : TChartSeries;
begin
CompId := '';
aSeries := nil;
GetParamValue(0, aPipLine);
GetParamValue(1, aBand);
aChart := TppTeeChart.Create(aBand);
aChart.Band := aBand;
aChart.Top := 50;
aChart.Width := 1000;
aChart.Height := 500;
aChart.Chart.RemoveAllSeries;

nicocizik

Hi Harry,

I would first suggest getting this working in Delphi before moving it to a
RAP passthru function. Do you get the same behavior when creating a
TeeChart in Delphi? If you are seeing the chart object, then you have
initialized the chart correctly for ReportBuilder but as for the minumum
settings required to see the chart information, you may need to consult the
TeeChart help file.

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rbuser

Nico,

I'm trying it from Delphi and having the same problems.
Dynamically creating a Chart is no problem, but the several ways i'm trying
to do it with a tppchart or i'm getting nothign printed or the chart is on a
form on the screen instead of on the report.
I suppose when looking in the Sources of RB i might find something but i
prefer the easy (read faster) way, you guys ....

It just knowing what function/procedures/properties to be called/set in what
order to get it right.

Thx

nicocizik

Hi Harry,

I went ahead and created you an example that creates a TppTeeChart in code
and places it on an empty report. I hope this helps.

http://www.digital-metaphors.com/tips/CreateChartInCode.zip

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rbuser

Nico,

Thx, but take a look at www.extrem.se, i'm skiing those and offpiste,
superb.

rbuser

Nico,

I've implemented it, but as i have to pass this to rap i'm looking
for the right event to call the create graph, first i did it in the
before generate of the band, there it didn't work eigther, no error
but not visible. when i place it in the before print of the report it
works fine, but isn't that a dangerous event.

I thought that the before print can be fired several times (of a
band) and the on generate only once,it this the same for the report
before print, because if so i must keep trak of the dynamically
created graphs ? series in order to free them when the report is
'killed/stopped'.

Is this thinking correct ?

nicocizik

Hi Harry,

Actually the Report.BeforePrint will only fire once per print. The band
events all have the possibility of firing multiple times per record. If the
Report.BeforePrint works, I would say stick with it. To be sure the object
is only created once, you can always set a flag once it is created the first
time and check it each time the event code is executed.

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nicocizik

They look nice...

I'm on the Dynastar Twister (twin tip mogul ski) and will be getting the
Rossi Scratch FS soon.

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rbuser

Nico,

Next Problem,

When coding in Rap i have the before print event on the report, but
no such event on the subreport. But, if i would use the before print
of the main report, how can i reference a band in a subreport .....

Thx

nicocizik

Hi Harry,

From the BeforePrint Event in RAP, you can access the
SubReport.Report.Bands[] property to reference a band in a given subreport.
You could also create a global variable that references a certain band
inside a subreport in RAP.

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