gtkmm- Hiding toplevel window

[KatiePoint]

I am a new programmer, new to this forum and new to gtkmm.
I have created an application that goes through a bunch of windows where the user must fill out fields etc all using gtkmm. I am able to hide all the other windows when I move from window to window. Except the main/ toplevel window which always stays open and if I try to hide() closes the entire program.

Any help is appreciated, thanks in advance.

[raja.genupula]

what comes to mean for top level window , explain more please

[howefield]

Thread moved to the "Programming Talk" forum.

[KatiePoint]

It is the first window I open. So in main when I run the "window"

Gtk::Main::run(window);

[raja.genupula]

Yeah it seems like , your program will start with opening that window.

[bird1500]

There are 2 ways to display the toplevel window:
1) The old way, with Gtk::Main::run(window)
2) The new way, with Gtk::Application::run(window)

I'm giving an example with the latter one since they require different approaches and the latter one is the preferred one. This sample app will hide the toplevel window the first 3 times you click on "close" and the 4th time the app will exit completely.

main.cpp


#include "Win.h"

int
main(int argc, char *argv[])
{
Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv,
"com.your.appName");
Win win(app);
app->run(win);
return 0;
}
Win.h:


#ifndef WIN_H
#define WIN_H

#include <gtkmm.h>

class Win : public Gtk::Window
{
public:
Win(const Glib::RefPtr<Gtk::Application> &a);
virtual ~Win() {}

bool
toggleVisibility();

virtual bool
windowClosing(GdkEventAny*);

private:
const Glib::RefPtr<Gtk::Application> &app;
};


#endif

Win.cpp:


#include "Win.h"
#include <pthread.h>

Win::Win(const Glib::RefPtr<Gtk::Application> &a) : app(a)
{
set_default_size(600, 400);
signal_delete_event().connect(sigc::mem_fun(*this,
&Win::windowClosing));
show_all();
}

void*
showUpAgain(void *obj)
{
pthread_detach(pthread_self());
sleep(2);
Win *p = (Win*)obj;
/*using pthreads and calling toggleVisibility() directly
from the pthread
since Glib::signal_idle(..) doesn't work - blocks the system,
probably because of app->hold()
*/
p->toggleVisibility();
return NULL;
}

bool
Win::windowClosing(GdkEventAny *pEvent)
{
toggleVisibility();

//exit completely after a few close requests
static int count = 0;
count++;
if(count > 3) {
app->quit();
}

pthread_t thread;
pthread_create(&thread, NULL, showUpAgain, this);
return true;
}

bool
Win::toggleVisibility()
{
if(get_visible()) {
app->hold();
hide();
} else {
set_visible();
}

return false;
}