[Gambas-user] set of questions

[Faysal Banna]

Doriano...

do you have a sample src package of what you have just explained ?
can u share a simple running example with source files and forms ?

much regards

On Wed, Oct 21, 2009 at 11:11 AM, Doriano Blengino <
doriano.blengino at ...1909...> wrote:

> Dima Malkov ha scritto:
> > Using Gambas 2.7, Debian Lenny 32
> > --
> >
> > Hello!
> >
> > Main question.
> > I want to run my gambas2-application from USB-FLASH-DISK on the
> > computers, that do not have gambas2 installed.
> >
> > There is a folder on my USB-FLASH-DISK with my application and
> > subfolders:
> > 1) "bin", includes files "gba2", "gbc2", "gbi2", "gbx2", soft links;
> > 2) "lib", includes files "*.so.0.0.0", "*.component", "*.gambas", soft
> > links;
> > 3) "share", includes "icons/*.png", "info/*" (strange files),
> > "mime/*.xml".
> > It also includes bash-script for copying all above to system
> > folders /usr/bin/, /usr/lib/ and /usr/share.
> >
> > Can I run my application with just some command, without copying?
> >
> Copying is a very bad idea - there is the risk of messing up the host
> system.
> In theory it is possible to do what you want, at a variable degree of
> difficulty.
> The only problem can arise if gambas searches its components using
> absolute paths without querying environment variables. You can refer, in
> your script, to relative paths for executables, and use the environment
> variable LD_LIBRARY_PATH for shared libraries. About /usr/lib and
> /usr/share, I am not sure about what gambas does.
> >
> > 2) I have the GridView in my program, that displays 4 thousands of rows.
> > When it updates the data (4-10 seconds), program do not reflexes.
> > There is a string in the documentation:
> > "You should use the last <method> if you have thousands of rows to
> > display.".
> > I'm sorry, I do not understand this at all.
> > Could anybody explain this on a simple example?
> >
> The "second method" refers to the Data event, and works like this: you
> don't load all the data in the GridView; instead, you wait for Gridview
> to ask for the data through the Data event. In the event handler, you
> load the requested data. This method if far faster because Gridview asks
> for data only when needed (ie, when they are visible).
> You put a Gridview in a form, and setup the Data event. When the form
> shows up, there will be, say, 10 rows visible; Gridview will raise the
> event 10 times, asking for data of each visible row. If you scroll the
> Gridview, as more rows will become visible, more data will be requested
> by mean of Data event.
>
> Sorry for the missing answers - I told you the few things I knew.
> Regards,
> Doriano
>
>
>
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