Possible bug in TAChart/COCOA
lazarus / 55-TAChart

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AL · 2020-01-30 03:59

OK , I found (I think) some of the problem which I am fithing since a
few weeks.
I need to make a bug report, but I do not know how.
The bug tracker is a bit of a mistery to me.

When a chart is on a form, adding a speedbutton to the form throws the
chart as a mirror image.

May be some other controls do this as well I am still investigating ,

Attached is small project to demonstrate.

FPC 3.3.1
Laz 2.1.0  r62510

Win10  cross-compiling to Darwin-Cocoa

 Edit:  Project file  too big for the forum

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wp · 2020-01-30 08:27

Quote from: AL on January 30, 2020, 04:59:58 amProject file  too big
for the forum
For a project with just a chart and speedbutton? Never. It has been
written many times here that users must not add compiler-generated
files to the zip for upload, only .lfm, .pas, .lpi, .lpr and possibly
data files needed.

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AL · 2020-01-30 13:46

Ah these newbies, you always need to repeat everything 
Here is the stripped down file.
To reproduce:  Add a tchart to a form, add a speed button.
In my case I cross compile win10-Darwin and tested in a VMware running
OS 10.14
I do not know if it would show in a real Mac.
I think the culprit is the speedbutton rather than TAChart.

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wp · 2020-01-30 15:48

I see - this project is really very simple...

As I don't have access to a Mac I cannot fix this issue. It sounds
similar to
https://forum.lazarus.freepascal.org/index.php?topic=47675.0 and to
https://bugs.freepascal.org/view.php?id=34334. Do you see the same
issue also with a TreeView? Well, maybe the issue is fixed there as
the bug report says, but are there any other components which are
drawn upside down? And another, maybe stupid question: Does the
program behave in the same way on a "real" Mac, not just on a VM?

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AL · 2020-01-30 17:26

yes I made a very simple project to demonstrate the bug.  What is
strange is that a Speed button would flip the whole form!  I do not
have a real mac myself so cannot test it.
I had a tstatictext component on my form that was also drawn flipped,
but that was less obvious than the chart.
Should we post this in the COCOA section?