axis range problem
lazarus / 55-TAChart

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mtanner · 2018-08-18 07:25

I have a  dual-axis chart.  I use the following bit of code to control
the range of the left axis.

With MyChart.AxisList[0] do begin
    Min=0;  Max=100; UseMin=true; UseMax=true;
end;

although actually the values are supplied by variables (whose values I
have traced and checked to be correct).

The chart comes out with an x-range of 0 to 1000 (not 100). Except
when I plot a series which is actually using the right-hand axis
(whose range control seems to work ok).

Any suggestions please?

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wp · 2018-08-18 07:33

You do not provide enough information for me to give a precise answer.
Please assemble a short demo which shows the issue and upload it here
(only .pas, .lfm, .lpi and .lpr files in a common .zip).

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WooBean · 2018-08-18 09:18

Quote from: mtanner on August 18, 2018, 09:25:42 am...

With MyChart.AxisList[0] do begin
    Min=0;  Max=100; UseMin=true; UseMax=true;
end;
...
Any suggestions please?

In my opinion your code does nothing. For example: "Min=0;" can be a
valid expression (compare variable or field "Min" to zero) but its
result is never used.

WooBean

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mtanner · 2018-08-18 10:38

WooBean, apologies for the typo, the real code does have ":=" and not
just "=", and it does do something under the circumstances described.