Mer/Documentation/Vala control panel
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Mer needs new control panels. But not everyone knows C, but they may be proficient in C#. Vala is a language with C#-like syntax, that compiles to C, which makes it perfect for writing CPAs which are (to my knowledge) C only.
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{{Mer}}
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But, documentation on Vala is rather lacking.
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An example can be found here: http://slexy.org/view/s2LF62vIvs
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Mer needs new control panels. But not everyone knows C, but they may be proficient in C#. Vala is a language with C#-like syntax, that compiles to C, which makes it perfect for writing CPAs which are (to my knowledge) C only. But, documentation on Vala is rather lacking.
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(maemo.org wiki sucks and does not understand "<source lang="c-sharp">")
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An example can be found here:
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<source lang="csharp">
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/*
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*      cpa.vala
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*     
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*      Copyright 2009 Faheem Pervez <qwerty12>
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*     
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*      This library is free software; you can redistribute it and/or
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*      modify it under the terms of the GNU Lesser General Public
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*      License as published by the Free Software Foundation; either
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*      version 2.1 of the License, or (at your option) any later version.
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*     
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*      This library is distributed in the hope that it will be useful,
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*      but WITHOUT ANY WARRANTY; without even the implied warranty of
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*      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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*      Lesser General Public License for more details.
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*     
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*      You should have received a copy of the GNU Lesser General Public
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*      License along with this library; if not, write to the Free Software
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*      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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*      MA 02110-1301, USA.
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*/
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using Osso;
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using Hildon;
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using Gtk;
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public Hildon.Program program;
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public Gtk.Widget dialog;
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Status execute(Context *osso, void* data, bool user_activated)
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{
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        osso = new Osso.Context("vala-test-applet", "0.1", false, null);
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        program = Hildon.Program.get_instance();
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        data = new Hildon.Window();
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        program.add_window((Hildon.Window)data);
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        dialog = new Hildon.Note.information ((Hildon.Window)data, "Hey, I'ma CPA written in Vala.\n"+"The \"programmer\" who wrote me sucks; but he hopes \nthat this can be used for something.");
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        ((Gtk.Window)dialog).set_modal(true);
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        ((Gtk.Window)dialog).set_position(WindowPosition.CENTER_ALWAYS);
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        ((Gtk.Dialog)dialog).run();
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        dialog.destroy();
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delete osso;
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        return Status.OK;
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}
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//valac -C --pkg libosso --pkg hildon-1 cpa.vala ; gcc `pkg-config --cflags libosso hildon-1` -fPIC -c cpa.c ; gcc -module -avoid-version -shared -Wl,-soname,cpa.so  -o cpa.so cpa.o  -lc
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</source>
Save the above as "cpa.vala". Because valac seems to be more accustomed for making programs, you have to use valac's -C option which'll output the generated C code and gcc can then be used to make it into a library.
Save the above as "cpa.vala". Because valac seems to be more accustomed for making programs, you have to use valac's -C option which'll output the generated C code and gcc can then be used to make it into a library.
Improvements ''very'' much welcomed.
Improvements ''very'' much welcomed.
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[[Category:Development]]

Latest revision as of 13:50, 9 March 2011

Image:Mer infobox icon.png
 Mer is back : Please visit http://www.merproject.org to learn more about this news.


Mer needs new control panels. But not everyone knows C, but they may be proficient in C#. Vala is a language with C#-like syntax, that compiles to C, which makes it perfect for writing CPAs which are (to my knowledge) C only. But, documentation on Vala is rather lacking.

An example can be found here: 

/*
 *      cpa.vala
 *      
 *      Copyright 2009 Faheem Pervez <qwerty12>
 *      
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation; either
 *      version 2.1 of the License, or (at your option) any later version.
 *      
 *      This library is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      Lesser General Public License for more details.
 *      
 *      You should have received a copy of the GNU Lesser General Public
 *      License along with this library; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 */
 
using Osso;
using Hildon;
using Gtk;
 
public Hildon.Program program;
public Gtk.Widget dialog;
 
Status execute(Context *osso, void* data, bool user_activated)
{
        osso = new Osso.Context("vala-test-applet", "0.1", false, null);
        program = Hildon.Program.get_instance();
        data = new Hildon.Window();
        program.add_window((Hildon.Window)data);
 
        dialog = new Hildon.Note.information ((Hildon.Window)data, "Hey, I'ma CPA written in Vala.\n"+"The \"programmer\" who wrote me sucks; but he hopes \nthat this can be used for something.");
        ((Gtk.Window)dialog).set_modal(true);
        ((Gtk.Window)dialog).set_position(WindowPosition.CENTER_ALWAYS);
        ((Gtk.Dialog)dialog).run();
        dialog.destroy();
	delete osso;
 
        return Status.OK;
}
 
//valac -C --pkg libosso --pkg hildon-1 cpa.vala ; gcc `pkg-config --cflags libosso hildon-1` -fPIC -c cpa.c ; gcc -module -avoid-version -shared -Wl,-soname,cpa.so  -o cpa.so cpa.o  -lc

Save the above as "cpa.vala". Because valac seems to be more accustomed for making programs, you have to use valac's -C option which'll output the generated C code and gcc can then be used to make it into a library.

Improvements very much welcomed.

Retrieved from "https://wiki.maemo.org/Mer/Documentation/Vala_control_panel"