[bug 39159] chart title size is not preserved
lazarus / 55-TAChart

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Muso · 2021-07-04 22:48

I have set the chart title to size 12 in the IDE. When I run my
program on a laptop with a higher DPI resolution, the title gets to
small. When I open the *.lpi file on that laptop, I see that the title
size is set to 8.

I understand that the form sizes must be adjusted according to the
resolution but the font size must not be changed in my opinion because
when I explicitly set the title size at runtime then it looks correct
on different screens (laptops and monitors).

The question is if I maybe made a mistake. In the project options I
set DPI awareness to true. Do I have to make a further setting to keep
the title font size constant or is it a bug?

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wp · 2021-07-05 08:55

You are right: TAChart does not follow the rules of LCL scaling obeyed
by other controls. The problem is that drawing on a monitor is only
one possibility to output charts, there are other drawers for svg
file, opengl, wmf file etc; charts even can be painted in a no-gui
environment. Therefore, it is difficult to keep all these
possibilities together. I am not saying that LCLScaling is not
possible for screen output, but I do not want to address it now,
immediately before the release of v2.2, since it will certainly
introduce some bugs here and there.

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Muso · 2021-07-05 09:10

Quote from: wp on July 05, 2021, 10:55:55 amI am not saying that
LCLScaling is not possible for screen output, but I do not want to
address it now,

No problem. Thanks for taking it into account. Should I open a bug
report that it is not forgotten?

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wp · 2021-07-05 09:19

Yes please. And assign it to me.

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Muso · 2021-07-05 11:47

Quote from: wp on July 05, 2021, 11:19:25 amYes please. And assign it
to me.

I created the bug:
https://bugs.freepascal.org/view.php?id=39159

I have no rights to assign it to anybody.

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wp · 2021-07-05 14:21

I assigned it to myself.