Pressing ESC to close the rendering window ?

C++ coding using Panda3D
2

In PandaFramework:

void 	define_key (const string &event_name, const string &description, EventHandler::EventCallbackFunction *function, void *data);

So, you have to:

PandaFramework framework;

void exit_event ( const Event *e, void *data )
{
framework->close_all_windows();
}

In your setup section (before looping):

window->enable_keyboard();
framework.define_key ("escape", "Quit", exit_event, (void *) NULL);

This will halt by-the-hard-way your game, it’s recomendable that loop yourself the PandaFramework, so you can stop it when you want.