[Lazarus] Installing custom control in Lazarus - where can I find it?

Salvatore Coppola coppolastudio at gmail.com
Fri Aug 28 07:46:02 CEST 2020

Have restarted the lazarus just recompiled?

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Il giorno 27 Ago 2020, 22:51, alle ore 22:51, Bo Berglund via lazarus <lazarus at lists.lazarus-ide.org> ha scritto:
>I am (again) trying to port a Delphi application to Lazarus/FPC.
>This time I need a customized version of TListView, which I converted
>to use in Lazarus back in 2018.
>See thread titled:
>"Converting a component package Delphi->Lazarus using built-in
>I found the files for the converted component on my disk as:
>easylistview.lpk THis is the package file 
>No using Lazarus 2.0.8 and FPC 3.0.4 I did the following:
>- Started Lazarus
>- Told it to start a new project (to not interfere with my current
>- Package/Open package file
>- Navigated to the easylistview.lpk file
>- Clicked the Compile button. Finished successfully.
>- Use/Install. Lazarus started to rebuild itself
>- No visible errors shown
>- Lazarus restarted
>Now, how do I find the component I just installed so I can use it?
>I expected a new tab named AGI to appear with the component inside of
>it but I cannot find it...
>This is what is (or rather was, see below) in the register procedure
>in EasyListView.pas:
>procedure Register;
>	RegisterComponents('AGI', [TEasyListView]);
>And this is the lpk file content after the compile/install:
><?xml version="1.0" encoding="UTF-8"?>
>  <Package Version="4">
>    <PathDelim Value="\"/>
>    <Name Value="EasyListView"/>
>    <Type Value="RunAndDesignTime"/>
>    <CompilerOptions>
>      <Version Value="11"/>
>      <PathDelim Value="\"/>
>      <SearchPaths>
>        <UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
>      </SearchPaths>
>    </CompilerOptions>
>    <Files Count="1">
>      <Item1>
>        <Filename Value="EasyListView.pas"/>
>        <UnitName Value="EasyListView"/>
>      </Item1>
>    </Files>
>    <RequiredPkgs Count="1">
>      <Item1>
>        <PackageName Value="IDEIntf"/>
>      </Item1>
>    </RequiredPkgs>
>    <UsageOptions>
>      <UnitPath Value="$(PkgOutDir)"/>
>    </UsageOptions>
>    <PublishOptions>
>      <Version Value="2"/>
>    </PublishOptions>
>    <CustomOptions Items="ExternHelp" Version="2">
>      <_ExternHelp Items="Count"/>
>    </CustomOptions>
>  </Package>
>Now the strangest thing is that in this process Lazarus has completely
>mangled the EasyListView.pas source file so it now only has this
>content wheras the original was 27 kbytes....:
>{ This file was automatically created by Lazarus. Do not edit!
>  This source is only used to compile and install the package.
> }
>unit EasyListView;
>{$warn 5023 off : no warning about unused units}
>  LazarusPackageIntf;
>procedure Register;
>  RegisterPackage('EasyListView', @Register);
>So it is overwriting the source file for the component with a
>basically empty file, which it successfully installs and is nowhere to
>be found....
>Apparently I am doing something completely wrong here, but what?
>Bo Berglund
>Developer in Sweden
>lazarus mailing list
>lazarus at lists.lazarus-ide.org
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