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<div style="border: 1px solid red; background-color: #faa; padding: 20px;"><div style="text-align:center;">'''TECHNOLOGY PREVIEW'''</div></div>

=== Introduction ===

This example requires a working configuration of MADDE. At least one target has to be installed and set as 'default'. The basic steps to do this are described in this [[MADDE/Configuration | guide]].

* start a project in MADDE 
* use template-projects for developing
* compile a project in MADDE
* build a package

=== Templates ===

Templates are used in MADDE to simplify the set up of the basic skeleton for a project. The following command shows the list of available templates:

mad pscreate -l

:The command gives following output:

TEMPLATE NAME    TYPE     DESCRIPTION
 empty            prog     Empty project
 lib_simple       lib      Simple example for C/C++ libraries
 qt_lib_simple    qtlib    Simple example for Qt libraries
 qt_simple        qtprog   Simple example for Qt programs
 simple           prog     Simple example for C/C++ programs

=== Start the project ===

The goal of this example is to create a simple GTK helloworld application. Therefore we can use the "simple" template out of the list with small modifications. The following command creates a project using the "simple" template and named as "helloworld"

mad pscreate -t simple helloworld

Afterwards the skeleton is created with the following subdirectories:

* '''src''': place for sourcefiles
* '''debian''':configuration files, which are needed to create the package later on
* '''uis''':empty folder for ui files which would be needed with Qt applications

Further it contains a file named "prog.pro", which is a [http://doc.trolltech.com/4.5/qmake-project-files.html project file], needed to create the Makefile with qmake.

Lets create a small GTK helloworld application hello.c in src directory:

<source lang="c">
#include <gtk/gtk.h>

static void destroy( GtkWidget *widget,
                     gpointer   data )
{
   gtk_main_quit ();
}

int main( int   argc,
         char *argv[] )
{
   GtkWidget *window;
   GtkWidget *label;
   gtk_init (&argc, &argv);
   label = gtk_label_new("Hello world");
   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);   
   g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (destroy), NULL);
   gtk_container_add (GTK_CONTAINER (window), label);
   gtk_widget_show (window);
   gtk_widget_show(label);
   gtk_main ();
   return 0;
}
</source>

=== Compile & build ===

Before we can compile GTK application we have to modify prog.pro file.
In prog.pro file edit SOURCES  += and HEADERS +=   lines to contain source files in the project, in our case wee need only following line:
SOURCES  += hello.c

For GTK applications we want to use pkgconfig to help compiling and linking against correct libraries.

For our example we add following lines:
CONFIG      += link_pkgconfig  
and
PKGCONFIG   += gtk+-2.0

Now we are ready to build our application.

The following steps describe how to compile and build the project.

1. Create the Makefile:

cd helloworld
 mad qmake

2. Compile the project.

mad make

:Now the executable program helloworld is created in the helloworld/build directory.

3. Create a debian package:

mad dpkg-buildpackage

:This command will build the project and make a debian package called helloworld_0.1_armel.deb. The debian package will be created in the projects' parent directory.

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Editing MADDE/GTK Example

@@ Line 1: / Line 1: @@
-{{MADDE}}
+<div style="border: 1px solid red; background-color: #faa; padding: 20px;"><div style="text-align:center;">'''TECHNOLOGY PREVIEW'''</div></div>
 === Introduction ===
-This example requires a working configuration of [[MADDE]]. At least one target has to be installed and set as 'default'. The basic steps to do this are described in this [[MADDE/Configuration | guide]].
+This example requires a working configuration of MADDE. At least one target has to be installed and set as 'default'. The basic steps to do this are described in this [[MADDE/Configuration | guide]].
 * start a project in MADDE