I tried to write a similar program to that I found at:
https://github.com/GNOME/gtkmm-documentation/tree/master/examples/book/application/app_and_win_menus
The problem is that menu does not show itself but menu items do when I
click the place the menu bar should appear. How to make menu bar
visible? Below is my program. I would appreciate any help because I'm
struggling for a long time with the case.
main.cpp
#include <iostream>
#include <gtkmm.h>
#include "simwdg.h"
int main ( int argc, char **argv )
{
Glib::RefPtr<SimApp> app = (Glib::RefPtr<SimApp>)SimApp::create ( );
app->run(argc, argv);
return 0;
}
-------------------
simwdg.h
#ifndef SIMMENU_H
#define SIMMENU_H
#include <gtkmm.h>
class SimAppWnd;
class SimApp : public Gtk::Application
{
public:
SimApp ( );
virtual ~SimApp();
public:
virtual void on_startup();
virtual void on_activate();
static Glib::RefPtr<SimApp> create();
public:
bool on_delete(GdkEventAny* event);
void on_file_menu();
void on_file_menu_new();
void on_file_menu_close();
private:
SimAppWnd *wnd;
};
class SimAppWnd : public Gtk::ApplicationWindow
{
public:
SimAppWnd();
virtual ~SimAppWnd();
private:
Gtk::DrawingArea darea;
public:
bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr);
void on_file_menu_close();
};
#endif // SIMMENU_H
------------------
simwdg.cpp
#include <iostream>
#include "simwdg.h"
SimApp::SimApp ( ) : Gtk::Application ( "KJ.Projects.SimApp" )
{
Glib::set_application_name ( "App" );
}
SimApp::~SimApp()
{
}
void SimApp::on_startup()
{
Glib::RefPtr<Gio::Menu> menu = ( Glib::RefPtr<Gio::Menu> )
Gio::Menu::create(),
wmenu = ( Glib::RefPtr<Gio::Menu> )
Gio::Menu::create(),
fmenu = ( Glib::RefPtr<Gio::Menu> )
Gio::Menu::create();
std::cout << "Startup called" << std::endl;
Gio::Application::on_startup();
add_action ( "filenew", sigc::mem_fun ( *this,
&SimApp::on_file_menu_new ) );
add_action ( "fileclose", sigc::mem_fun ( *this,
&SimApp::on_file_menu_close ) );
menu->append ( "New", "app.filenew" );
set_app_menu ( menu );
fmenu->append("Close", "app.fileclose");
wmenu->append_submenu("File", fmenu);
set_menubar(wmenu);
}
void SimApp::on_activate()
{
std::cout << "Activate called" << std::endl;
Gio::Application::on_activate();
wnd = new SimAppWnd;
add_window ( *wnd );
wnd->signal_delete_event().connect ( sigc::mem_fun ( *this,
&SimApp::on_delete ) );
hold();
wnd->show_all();
}
Glib::RefPtr< SimApp > SimApp::create ( )
{
std::cout<<"Create application"<<std::endl;
return Glib::RefPtr<SimApp> ( new SimApp() );
}
bool SimApp::on_delete ( GdkEventAny* event )
{
Gtk::ApplicationWindow *win= ( Gtk::ApplicationWindow * )
get_active_window();
win->set_show_menubar ( false );
release();
return false;
}
SimAppWnd::SimAppWnd()
{
Gtk::ApplicationWindow();
set_title ( "Simulation" );
set_default_size ( 300, 300 );
}
SimAppWnd::~SimAppWnd()
{
}
void SimApp::on_file_menu()
{
std::cout << "File menu" << std::endl;
}
void SimApp::on_file_menu_new()
{
std::cout << "(app) File menu new" << std::endl;
}
bool SimAppWnd::on_draw ( const Cairo::RefPtr< Cairo::Context >& cr )
{
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
std::cout << "On draw: " << "w: " << width << " h: " << height <<
std::endl;
// coordinates for the center of the window
// int xc, yc;
// xc = width / 2;
// yc = height / 2;
//
// cr->set_line_width ( 10.0 );
//
// // draw red lines out from the center of the window
// cr->set_source_rgb ( 0.8, 0.0, 0.0 );
// cr->move_to ( 0, 0 );
// cr->line_to ( xc, yc );
// cr->line_to ( 0, height );
// cr->move_to ( xc, yc );
// cr->line_to ( width, yc );
// cr->stroke();
return true;
}
void SimApp::on_file_menu_close()
{
std::cout << "(app) File menu close" << std::endl;
}
--
Regards
Krzysztof
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