Monday, March 11, 2013

Building GUI using GtkBuilder in C Project

GLADE is a RAD(Rapid Application Development) Tool which is used for quick and easy development of GUI for GTK+ toolkit and GNOME Desktop environment.

GUI designed by glade, can be saved in XML file (it can be saved in .C or .glade file also). Using GtkBuilder (A GTK+ object), this GUI xml can be loaded by applications dynamically.

By using GtkBuilder, Glade XML files can be used in numerous programming languages including C, C++, C#, Vala, Java, Perl, Python and others.
Building GUI using GtkBuilder in C-Program:

Assume we have designed a GUI using glade, which is saved as /gem.xml /gem.c. Irrespective of their extensions all these files contains XML format strings/tags only, which contains information to build GUI. For example, if we consider gem.c file, it contains the code as shown below

Now we send gui_buffer (see above code) as a parameter to GtkBuilder, which builds required GUI of our application. To access gui_buffer in any file make a declaration

extern const char *gui_buffer;

//Code to build gui by GtkBuilder
 try {
        widgets = Gtk::Builder::create_from_string(gui_buffer);
    } catch (Gtk::BuilderError &e) {
        printf("Error building GUI: %s\n", e.what().c_str());

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