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    <p>First of all libglade is an old library. If you are writing new project start with <a href="http://library.gnome.org/devel/gtkmm/stable/classGtk_1_1Builder.html" rel="noreferrer">gtk builder</a>.</p> <p>As you can see <a href="http://library.gnome.org/devel/gtkmm-tutorial/unstable/sec-builder-using-derived-widgets.html.en" rel="noreferrer">here</a> gtkmm provide easy way to create your own widgets and see them (almost) in glade tool. You simply insert plain DrawinArea widget to window and then tell gtk-builder to put in this place yours derived class.</p> <p>Here is all together:</p> <p>Setting up gtk-builder:</p> <pre><code>refBuilder = Gtk::Builder::create_from_file(ui_file); GlDrawingArea*glArea = NULL; refBuilder-&gt;get_widget_derived("drawing_gl",glArea); </code></pre> <p>Opengl DrawingArea class:</p> <pre><code> class GlDrawingArea : public Gtk::DrawingArea , public Gtk::GL::Widget&lt;GlDrawingArea&gt; { public: GlDrawingArea(BaseObjectType* cobject, const Glib::RefPtr&lt;Gtk::Builder&gt;&amp; builder); virtual ~GlDrawingArea(); protected: void on_realize(); bool on_expose_event(GdkEventExpose* event); bool on_configure_event(GdkEventConfigure* event); private: Glib::RefPtr&lt;Gtk::Builder&gt; refBuilder; }; </code></pre> <p>Constructing opengl drawingarea:</p> <pre><code>// GlDrawingArea: GlDrawingArea::GlDrawingArea(BaseObjectType*cobject, const Glib::RefPtr&lt;Gtk::Builder&gt;&amp; builder) : Gtk::DrawingArea(cobject), refBuilder(builder), screen_tex(0) { // // Configure OpenGL-capable visual. // Glib::RefPtr&lt;Gdk::GL::Config&gt; glconfig; // Try double-buffered visual glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB | Gdk::GL::MODE_DEPTH | Gdk::GL::MODE_DOUBLE); if (!glconfig) { std::cerr &lt;&lt; "*** Cannot find the double-buffered visual.\n" &lt;&lt; "*** Trying single-buffered visual.\n"; // Try single-buffered visual glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB |Gdk::GL::MODE_DEPTH); if (!glconfig) { std::cerr &lt;&lt; "*** Cannot find any OpenGL-capable visual.\n"; std::exit(1); } } // print frame buffer attributes. GLConfigUtil::examine_gl_attrib(glconfig); // // Set OpenGL-capability to the widget. // set_gl_capability(glconfig); } </code></pre>
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    1. USqba
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    1. COThank you very much "qba". So the key was in using "derived" widgets.
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