Re: Derived widget in libglademm

[Philipp Klaus Krause <pkk spth de>]

Murray Cumming schrieb:

> I guess I'd need to see a complete compileable simple test case to
> figure this out.

I really think this is a problem of me not understanding how to use a
derived widget. In main():

	Display *display = 0;
	refXml->get_widget_derived("display", display);
	
	Gtk::Window* main_win = 0;
	refXml->get_widget("main_window", main_win);
	
	if (main_win)
	{
		kit.run(*main_win);
	}
	return 0;
}

The get_widget_derived() calls created a widget of type Display, I want
it to be used as the widget called "display" in main_window, but it
seems there's something else in main_window (probably an ordinary
Gtk::DrawingArea).

I've gzipped the Makefile so it will make it to the list (40KB limit).

#include "display.h"

#include <iostream>

#include <GL/gl.h>
#include <GL/glu.h>
#include <gtkmm/messagedialog.h>

Display::Display(BaseObjectType *da, Glib::RefPtr<Gnome::Glade::Xml>& refGlade) : Gtk::DrawingArea(da)//, Gtk::GL::Widget<Display>()
{
	std::cout << "Constructor called.";
	std::cout.flush();
	Glib::RefPtr<Gdk::GL::Config> glconfig;
	glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB | Gdk::GL::MODE_DOUBLE);
	
	if(!glconfig)
	{
		Gtk::MessageDialog e("Couldn't find OpenGL visual.\nPlease ensure that OpenGL drivers are installed correctly.", Gtk::MESSAGE_ERROR);
		e.run();
	}

	if(!set_gl_capability(glconfig) || !is_gl_capable())
	{
		Gtk::MessageDialog e("Couldn't set OpenGL capability.\nPlease ensure that OpenGL drivers are installed correctly.", Gtk::MESSAGE_ERROR);
		e.run();
	}
}

void Display::on_realize(void)
{
	std::cout << "\non_realize() called.";
	std::cout.flush();
	Gtk::DrawingArea::on_realize();
	
	Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
	
	glwindow->gl_begin(get_gl_context());
	glClearColor(1.0, 0.0, 0.0, 1.0);
	glMatrixMode(GL_PROJECTION);
	glOrtho(-0.5, 0.5, -0.5, 0.5, -0.1, 0.1);
	glColor3f(1.0f, 0.0f, 0.0f);
	glDisable(GL_DEPTH_TEST);	
	glwindow->gl_end();
}

#include <libglademm.h>
#include <gtkglmm.h>

class Display : public Gtk::DrawingArea, public Gtk::GL::Widget<Display>
{
public:
	Display(BaseObjectType *da, Glib::RefPtr<Gnome::Glade::Xml>& refGlade);
	void on_realize(void);
};

#include <iostream>

#include <libglademm/xml.h>
#include <gtkmm.h>
#include <gtkglmm.h>


#ifdef ENABLE_NLS
#  include <libintl.h>
#endif


/* For testing propose use the local (not installed) glade file */
/* #define GLADE_FILE PACKAGE_DATA_DIR"/ttedit/glade/ttedit.glade" */
#define GLADE_FILE "ttedit.glade"

#include "display.h"
   
int
main (int argc, char *argv[])
{
	Gtk::Main kit(argc, argv);
	
	if(!Gtk::GL::init_check(argc, argv))
	{
		Gtk::MessageDialog e("Couldn't initilize gtkglextmm.\nPlease ensure that OpenGL drivers are installed.", Gtk::MESSAGE_ERROR);
		e.run();
		return(-1);
	}
	
	//Load the Glade file and instiate its widgets:
	Glib::RefPtr<Gnome::Glade::Xml> refXml;
	try
	{
		refXml = Gnome::Glade::Xml::create(GLADE_FILE);
	}
	catch(const Gnome::Glade::XmlError& ex)
    {
		std::cerr << ex.what() << std::endl;
		return 1;
	}
	
	Display *display = 0;
	refXml->get_widget_derived("display", display);
	
	Gtk::Window* main_win = 0;
	refXml->get_widget("main_window", main_win);
	
	if (main_win)
	{
		kit.run(*main_win);
	}
	return 0;
}

Attachment: Makefile.gz
Description: GNU Zip compressed data

Attachment: ttedit.glade
Description: application/glade