[Lazarus] VK codes error message

[Marc Weustink]

brian wrote:
> I have a fairly simple Lazarus program, just a few edit boxes on a form
> to enter some filenames and then it's doing a bunch of simple
> manipulations on a text file.
>
> Using Linux Mint 9 (a fork from Ubuntu), Free Pascal 2.4.0 and Lazarus
> 0.9.28.2, all 64-bit versions, when I run the program from konsole (run
> from within GNOME) I get the following messages, before the program
> (appears to?) run correctly
>
>
> [WARNING] Out of OEM specific VK codes, changing to unassigned
> [WARNING] Out of unassigned VK codes, assigning $FF
>
>
> Can anyone tell me what's going on? The only things I can find about VK
> codes pertain to Windows.

Since the LCL is compatible with the Delphi VCL, lazarus needed to mimic 
the virtual keycodes used in OnKeyDown/Press/Up on other platforms than 
windows. To generate code compilable for different platforms, those 
virtual codes need to be the same for every platform.

For the X based GTK1/2 some logic is added to map the keyboard layout 
reported by the X server to the Virtual keycodes.
Modern distros nowadays tend to provide one keyboard map fitting most of 
the available keyboards. This leads a map with over the 150 possible, 
sometimes exotic keys.
 From a software pov. the LCL cannot tell what kind of keyboard the user 
has plugged in, so it maps all keys reported by the X server.

Since the number of free to choose virtual keycodes is limited, the 
gtk1/2 logic runs out of codes for some of the exotic keys.

So if you happen to have a keyboard with say functionkeys F24-F48 and 
those keys are mapped last by the X server, you may have problems in 
Lazarus when detecting KeyUp/Press/Down.

Marc


>
>
> Thanks,
>
>
> Brian.
>
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