[Gambas-user] File extensions

[Willy Raets]

On Fri, 2013-05-17 at 19:52 +0200, Willy Raets wrote:
> On Fri, 2013-05-17 at 01:18 +0200, Benoît Minisini wrote:
> > Le 16/05/2013 17:39, Willy Raets a écrit :
> > > Hi all,
> > >
> > > I'm trying to achieve something but have no idea even where to start
> > > looking.
> > >
> > > Let's say I have a gambas3 application named MyFileMaker
> > >
> > > The application MyFileMaker saves files with extension .myfile
> > >
> > > What I want to achieve is when double clicking a .myfile for application
> > > MyFileMaker to open with the double clicked .myfile
> > >
> > > 1. How does my application know it is opened because a .myfile was
> > > double clicked instead of opened from menu as usual as it has to act
> > > differently?
> > > 2. How does the system know that a .myfile needs to be opened with
> > > MyFileMaker?
> > > 3. How do I give the .myfile their own icon, meaning how does the system
> > > know that when there is a .myfile it has to use an icon I provided?
> > >
> > > This all needs to work when a end user installs MyFileMaker, so:
> > >
> > > 4. What do I need to do when making a package. Are there any options
> > > that need to be set in the packaging wizard and how do they need to be
> > > set?
> > >
> > > Any hint or link to more information would be welcome.
> > >
> > 
> > The 6th step of the wizard packager allows you to define which mimetypes 
> > are associated with your program.
> > 
> > Alas, there is nothing to define a new mimetype, which is needed to make 
> > the system aware of the *.myfile extension.
> > 
> > All the information is there:
> > 
> > http://freedesktop.org/wiki/Specifications/shared-mime-info-spec
> > 
> > A new mime type can be defined by running the 'xdg-mime install xxx.xml' 
> > command where 'xxx.xml' is an XML file that defines how to identify the 
> > mime type.
> > 
> > The syntax of that xml file is defined there:
> > 
> > http://standards.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-0.18.html#id2604543
> > 
> > Regards,
> 
> This has been really helpful information, thanks.
> 
> 1. Implemented gb.args to get the path and file name that needs opening 
> 2. Added mimetype information to packager
> 3. Have a myapp.xml file set in place in packager (I chose
> for /usr/local/share/mime/packages/)
> 
> All I need to do know is code that on first run the myapp.xml file gets
> added as mimetype
> 
> All that needs to be done is:
> sudo xdg-mime install /usr/local/share/mime/packages/myapp.xml
> --novendor
> OR
> sudo update-mime-database /usr/local/share/mime/
> 
> This last option I found in the documentation and needs the xml file to
> be located in /usr/local/share/mime/packages/
> 
> I'm almost there, one more thing:
> 
> Is there a likewise solution to handle the icon being associated with
> the new mimetype.
> Where do these icons have to be placed and how to tell the system to use
> them?

I found this:

sudo xdg-icon-resource install --context mimetypes --size 48 appicon.png
application/fdap


Where application/fdap is the mimetype to connect the icon to and
appicon.png is a 48x48 icon

I was wondering where does Gambas store the Project Icon after
installation (or does it reside inside the gambas executable).

If so what would be the proper location to copy the icon.png to before
running the 'xdg-icon-recourse install' mentioned a above.

Any suggestions what is appropriate location for icons according to
linux standards, as I can't find any on Google. Maybe I'm using the
wrong search string, tried all kinds. 

> 
> 
> P.S.
> If I look at all this is could be implemented in the packager.
> If mime type defined in Gambas package wizard 6th step give option to
> make or browse for the xml file in packager wizard and add it
> automatically to Extra files in step 8 of package wizerd to be copied to
> to /usr/local/share/mime/packages/ upon installing application.
> Next have the packager (if mimetype conditions are met) make a script to
> be run after install doing a
> update-mime-database /usr/local/share/mime/ 
> 
> All xml files residing in /usr/local/share/mime/packages/ will have
> their mimetypes registered, so you don't even need to know the name of
> the .xml with above command.
> 
> Could something like that be done as it would kind of automate the
> mimetype configuration during packaging?

-- 
Kind regards,

Willy (aka gbWilly)

http://gambasshowcase.org/
http://howtogambas.org
http://gambos.org