Synchronization of dfm variables with source files
lazarus / 10-Designer

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vfclists · 2014-07-30 07:01

After changing the class of a control in the IDE, the type of the
object in the source was not changed and this resulted in
EClassNotFound errors when I run the program, which raises these
questions.

Does changing the class of an object only affect the .dfm?

Doesn't it automatically warn and change about the object type in the
source file?

Does it mean that adding code directly to the dfm will not
automatically create a variable for it in the source, or that if the
dfm variable already exists in the source it will not be updated?

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taazz · 2014-07-30 13:49

Quote from: vfclists on July 30, 2014, 09:01:09 am
After changing the class of a control in the IDE,

How? as far as I know there is no such think in the IDE, you have to
delete the existing object and place the new one. Changing the name of
the new object to the old one might solve all compile problems or it
might not.

Quote from: vfclists on July 30, 2014, 09:01:09 am the type of the
object in the source was not changed and this resulted in
EClassNotFound errors when I run the program, which raises these
questions.

Does changing the class of an object only affect the .dfm?

Doesn't it automatically warn and change about the object type in the
source file?

Does it mean that adding code directly to the dfm will not
automatically create a variable for it in the source, or that if the
dfm variable already exists in the source it will not be updated?

Yeah that is what happens if you edit the lfm directly, no lfm does
not support two way editing if you make any change to the lfm then you
are required to make the appropriate chances to the pas file as well
manually.

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vfclists · 2014-07-30 16:27

Quote from: taazz on July 30, 2014, 03:49:59 pmQuote from: vfclists on
July 30, 2014, 09:01:09 am
After changing the class of a control in the IDE,

How? as far as I know there is no such think in the IDE, you have to
delete the existing object and place the new one. Changing the name of
the new object to the old one might solve all compile problems or it
might not.


The IDE has the ability to change the class of an object. Right click
on it and from the menu you select 'Change Class...' . After you
change the class you will get  a dialog that warns you if the new
class doesn't have some of the properties of the previous class, and
gives you the chance to delete them.

If you don't know about it then welcome to Lazarus. There are lots of
changes but because Lazarus developers don't blog, no one gets to know
about them. When you are struggling with an existing project the last
thing on your mind is looking for new IDE features.