[Lazarus] Virtual TreeView on Windows x64

[Luiz Americo Pereira Camara]

Em 15/8/2012 09:45, Alexander Hofmann escreveu:
> Hi there.
>
> Is SVN:
> https://lazarus-ccr.svn.sourceforge.net/svnroot/lazarus-ccr/components/virtualtreeview-new/trunk/
> still the actual current repository for the Virtual TreeView component?
> In many cases I read to use the 4.8 branch to be able to compile the
> TreeView on x64 Windows,
> https://lazarus-ccr.svn.sourceforge.net/svnroot/lazarus-ccr/components/virtualtreeview-new/trunk/
>
> In particular, I was searching for a working reversion of the Virtual
> TreeView-Control for Windows x64 platforms. I found numerous bug fixes
> that should enable the Virtual TreeView to compile under that platform,
> and most advises I read was to use the 4.8 branch, which seems to be
> available under
> https://lazarus-ccr.svn.sourceforge.net/svnroot/lazarus-ccr/components/virtualtreeview-new/branches/4.8/
> ?

Yes.
In fact 4.8 is the most recent branch.

> I'm sorry for the rather dumb question here, but I think I might miss
> some points, as the 4.8 branch seems to be older than the trunk - and at
> least the 4.8 branch checked out from the URL above does not compile on
> Windows x64 on my platform (is: Lazarus 0.9.30.4 with FPC 2.6 in Windows
> 7 Ent. x64).

The VirtualTreeView from svn only supports Lazarus 1.0 or above. There's 
one version that supports 0.9.30 but does not have 64bit fixes: 
http://forum.lazarus.freepascal.org/index.php/topic,12172.msg62067.html#msg62067

Please try the Lazarus 1.0RC with 4.8 branch + LCL Extensions from svn ( 
http://code.google.com/p/luipack/source/browse/#svn%2Ftrunk%2Flclextensions 
)

If you find bugs in the above configuration, send patches through bug 
reports (one report for each issue).

I'll do a release compatible with 1.0 soon

> However, as I wanted to use the Virtual TreeView-Control and didn't see
> through all the different versions (which might be sourced in my missing
> experience with version control systems ;-)) I took todays last
> SVN-Version of 2488 and changed some parts to be able to use it.
> My patch is based on the work of Luiz Americo available at
> http://bugs.freepascal.org/view.php?id=21216 - which I applied by hand,
> as it was based on rev. 2275.
>
> Changes:
> o HasMMX-Function now returns true on all Windows x64 platforms, as I
> think all Windows-Capable CPUs with x64 instruction set support MMX
> (which might be wrong in the end, but I don't know)
> o AlphaBlend's assembler helper functions were changed to support x64
> CPUs (rather dirty Hack, but works - I also tried to use Window GDI's
> own AlphaBlend function, which worked up to some extend but resulted in
> dithered blending in the Constant-Alpha-And-Color mode, so I gave up on
> that)
> o all references to TControl.Color have been Wrapped into a small
> function checking for clDefault first to resolve the "Black Control" issue
>
> The "patch" is attached to that eMail. As I didn't know how to make a
> diff in respect to Luiz' patch, that one contains both his and my
> changes; maybe someone can help me out with that?
>
> By the way, using LCL-Extensions 0.4, Virtual TreeView of reversion 2488
> with the changes above applied seems to work fine with Lazarus 1.0 RC1
> x64, too.
>
> You may now throw Tomatoes and Eggs ;-)


Most of the above bugs are fixed, others needs more tests in 64bit.  
Assembly routines should be removed or reworked by someone that have 
such knowledge

Luiz