Steema Central

Posted: **Tue Nov 25, 2008 12:55 pm**

Scenario:

I have a 2D pointseries with x/y coordinates.
Each point has an index on which I identify him. Like

series.XValues[ Index ]

.

The problem now is, I can move this points on the chart by dragging them.
Eachtime I move the point I changed the coords like this way:

Code: Select all

series.XValues[ OldIndex ] := newX;

And the same for the yvalue.

After changing this TChart sorts the points in a manner that the indexes are changing. OldIndex isn't Oldindex anymore after changing x or Y Values.

How do I get the new Index for my old point ?

Any Help welcome !
Thanks in advance.

Posted: **Tue Nov 25, 2008 1:12 pm**

Hi ChZiegelt,

I can think of 2 options here:

1. Set series not to be ordered before populating them so that indexes don't change:

Code: Select all

  Series1.XValues.Order:=loNone;
  Series1.YValues.Order:=loNone;
  Series1.FillSampleValues();

2. Use Locate method for finding new indexes:

Code: Select all

  NewIndex:=Series1.XValues.Locate(NewXValue);

Hope this helps!

Posted: **Tue Nov 25, 2008 1:14 pm**

I never told you, but you are like an angel

Thank you very much !

Posted: **Tue Nov 25, 2008 1:38 pm**

Hi ChZiegelt,

Thank you very much. I'm glad to hear that helped

.

Steema Central

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