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Fraser Ross
Guest
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 Posted: Tue Apr 27, 2004 1:05 pm Post subject: TeeChart LoadChartFromFile |
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When I try to use the function I get the exception EClassNotFound and the
message "Class TBarSeries not found". This is the instruction I called it
with:
LoadChartFromFile(static_cast<TCustomChart*>(Chart1),
String("C:\Test.dat"));
I appear to have successfully used SaveChartToFile although I am not certain
what the last parameter is.
Fraser.
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Palle Meinert
Guest
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| Posted: Tue Apr 27, 2004 4:16 pm Post subject: Re: TeeChart LoadChartFromFile |
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To make loading and saving of tee-charts work you must detach all events
before saving and attach them again after you have loaded the chart. In my
case this would require a lot of work and maintenance.
Instead I create a temporary TChart without events, too which I assign all
settings and save to file.
TChart* tChart = new TChart(this);
tChart->Assign(static_cast<TChart*>(SurfaceChart));
tChart->SeriesList->Assign(static_cast<TChartSeriesList*>(SurfaceChart->Seri
esList));
SaveChartToFile(tChart, ChangeFileExt(FileName, ".tee"), true, true);
tChart->SeriesList->Clear();
delete tChart;
Note that tChart is my temporary chart and SurfaceChart is the chart I want
to save. The last parameter in SaveChartToFile specify whether the data
should be stored binary or as text.
When loading the information, I do same in reverse order.
tChart = new TChart(this);
LoadChartFromFile(static_cast<Chart::TCustomChart*>(tChart) , FileName);
SurfaceChart->Assign(static_cast<TChart*>(tChart));
SurfaceChart->SeriesList->Assign(static_cast< TChartSeriesList
*>(tChart->SeriesList));
tChart->SeriesList->Clear();
delete tChart;
be aware that the above code is a extract, and I might have missed something
or introduced error’s while trying to simplify it.
If this does not help you, I suggest you try steema’s newsgroup
/Palle
"Fraser Ross" <fraserATmembers.v21.co.unitedkingdom> skrev i en meddelelse
news:408e5b44 (AT) newsgroups (DOT) borland.com...
| Quote: | When I try to use the function I get the exception EClassNotFound and the
message "Class TBarSeries not found". This is the instruction I called it
with:
LoadChartFromFile(static_cast<TCustomChart*>(Chart1),
String("C:\Test.dat"));
I appear to have successfully used SaveChartToFile although I am not
certain
what the last parameter is.
Fraser.
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| Back to top |
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Fraser Ross
Guest
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| Posted: Tue Apr 27, 2004 5:48 pm Post subject: Re: TeeChart LoadChartFromFile |
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| Quote: |
tChart->SeriesList->Assign(static_cast<TChartSeriesList*>(SurfaceChart->Seri
esList));
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The line above won't compile because Assign is not a member of
TChartSeriesList.
I tried detaching the only event attached to the chart and it made no
difference.
All I need to save is the colours of the points. There is not a specific
function for that so I will probably implement a file format with
compression.
Fraser.
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Palle Meinert
Guest
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| Posted: Tue Apr 27, 2004 7:07 pm Post subject: Re: TeeChart LoadChartFromFile |
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| Quote: |
tChart->SeriesList->Assign(static_cast<TChartSeriesList*>(SurfaceChart->Seri
esList));
The line above won't compile because Assign is not a member of
TChartSeriesList.
hmmm, it works for me with teechart 6 pro. And according to the on-line help |
it enherits the assign method from TList.
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