On 30.09.2020 11:33, Michael Van Canneyt wrote:
On Wed, 30 Sep 2020, Ondrej Pokorny via lazarus wrote:
Yes, I implemented them, IIRC. Don't remember the details, though. I
added TDate, TDateTime and TTime formatters. It was quite a simple
addon, should be easy to find in the sources.
Good news :-)
How to activate them ? Because everywhere I tried, a TDateTime is still
displayed as a float: 44104.47848875 does not look like a date/time I can
recognize... :-)
I tried tooltip evaluation, evaluate/modifiy, inspect, local variables,
watches. None of them seems to use this.
Strange, they are enabled by default. They get activated in
ide\debugmanager.pas :
constructor TDebugManager.Create(TheOwner: TComponent);
//...
RegisterValueFormatter(skSimple, 'TDate', @DBGDateTimeFormatter);
etc.
Tooltip evaluation: works for me
Watches: works for me
Local Variables: doesn't work for me - strange, I have to re-check. I
thought it worked here.
Inspect: OK, I forgot about this one
Evaluate/modify: forgot about this one as well - but probably we need
the reversed function as well to be able to write the modified formatted
value back.
The problem of object-based visualizers like a visualizer for
TStrings is that your Lazarus IDE has to be compiled with the same
FPC version/codebase that you also use for the debugged program. In
Delphi this is usually the case (if you don't fiddle with RTL sources
to fix bugs). In FPC/Lazarus this doesn't need to apply. I usually
build Lazarus IDE less frequently than I update and build FPC trunk.
Or you can build Lazarus with FPC stable but develop applications
with FPC trunk. In that case such additions are unsafe.
I understand this need to keep versions aligned, but for the average
user who simply installs Lazarus, this will always be the case: they
get lazarus/FPC bundled.
In this matter the Laz/FPC developers are the exception.
(one could think "it's their own fault that they make it difficult" ;-) )
So with this caveat in mind, I think support for object-based visualizers
should definitely be added. Lazarus can easily enough detect that the
version
of FPC it uses for a project differs from the FPC version the IDE was
compiled
with, and disable the object-based visualizers.
I probably said bullshit here. We get the detailed information about the
object contents from the debugger, we don't use the object directly. So
it should be possible with different FPC/RTL versions. This, of course,
needs a much more sophisticated visualizer support in the IDE than there
currently is. But that should be not really hard to make.
Ondrej
--
_______________________________________________
lazarus mailing list
lazarus@lists.lazarus-ide.org
https://lists.lazarus-ide.org/listinfo/lazarus
