Steema Central

Hi all,

I am just doing my first tests with TeeChart in Appmethod 1.14 on the iOS platform. I have the TeeChart source code in my project group and everything compiles just fine.

My idea is to use TGanttSeries to represent an electronic program guide (tv guide) visually - my first tests are quite conclusive but panning/scrolling doesn't quite work correctly.

This is how I configured my TChart: Panning works only once when the app is started and doesn't follow the finger but has an offset. A second attempt doesn't work anymore and the app needs to be restarted for the panning to work again.

Any ideas?

I am using the latest TeeChart 2014 source code for FireMonkey.

Thanks a lot!
CJ

For completeness - here is the entire test file with my first steps (only mockup code):

https://github.com/darktab/simpleEPG/bl ... GFrame.pas

Thanks,
CJ

Hello,

in order to make work the pan/scroll over the chart you have to add the following line of code to your code :

Thanks!

This is the solution!

One more question though - what's the recommended way to pan/scroll only inside some arbitrary bounds?

Regards,
Christian

A way I succeeded in doing so, was implementing the onScroll event with this:
which then blocks scrolling on the bottom axis to a boundary between 0 and 70.

Hello,

cjacoby78 wrote:A way I succeeded in doing so, was implementing the onScroll event with this:

Code: Select all

if (fChart.BottomAxis.Minimum < 0) then
  begin
    fChart.BottomAxis.Minimum := 0;
    fChart.BottomAxis.Maximum := fChart.BottomAxis.Minimum + 50;
  end;
  if (fChart.BottomAxis.Maximum > 70) then
  begin
    fChart.BottomAxis.Minimum := 20;
    fChart.BottomAxis.Maximum := 70;
  end;

which then blocks scrolling on the bottom axis to a boundary between 0 and 70.

Yes, onScroll event is the way to limit the scroll to a known area.

Thanks a lot!