Hi all,

I'm thinking of porting a subset of my Delphi apps to Lazarus/LCL. These are apps that use minimal or no 3rd party components and have been written with some assumptions such as using PathDelim and friends with an eye towards possible conversion at some point.

I tried the Delphi project converter in Lazarus for a simple utility app that I had previously written in delphi and it seemed to work pretty good. Personally, I'd like to convert as much as possible to work in {$mode objfpc} which means more manual conversion here and there I'm thinking.

Anyone ported any significant projects from delphi to Lazarus/LCL that would like to share your experience and any not so obvious gotchas I should look out for?

Thank you,

Hi

If you don't have Windows API calls or other Windows specific technology, you have a chance of make it. :-)

The biggest problem in conversion is still the form file, .dfm / .lfm. Components which exist in VCL but not in LCL are replaced by a "fall-back" LCL component. Like TValueListEditor is replaced with TStringGrid. However, those components have different properties which can be removed of course but then the component doesn't behave as expected. Otherwise the form file conversion is decent. It can deal with nested components structures for example.

I guess you noticed the settings for replacement units, types and function names. Please take a note during your conversion or any missing settings and report them, either here or as a bug report.

Regards,
Juha

See here:

http://wiki.lazarus.freepascal.org/Code_Conversion_Guide

http://wiki.lazarus.freepascal.org/Multiplatform_Programming_Guide

Mattias

En/na Bogus?aw Brandys ha escrit:

OLE automation sucks.I tried controlling Excel but it's impossible but it's a fpc problem.

I successfully controlled OpenOffice.org.
Checking my notes (I don't remember the full details), it seems that the com machinery interfered with message processing: I was calling ProcessMessages in a loop to check if the Cancel button was pressed, but it didn't work. I put the loop in a separate thread and I had no further problems.

Bye

Lee Jenkins pisze:

OLE automation sucks.I tried controlling Excel but it's impossible but it's a fpc problem.

Boguslaw