pyglet.app

Applications

To start processing events, most programs merely need to execute run() after establishing one or more windows. A basic program with only one window, for example, is:

import pyglet

win = pyglet.window.Window()
pyglet.app.run()

Events

Manually instantiate the main event loop to handle events. The example below closes the program as soon as any window is closed (the normal strategy is to wait until all windows are closed):

event_loop = pyglet.app.EventLoop()

@event_loop.event
def on_window_close(window):
    event_loop.exit()

Classes

classEventLoop

The main run loop of the application.

The application event loop, which handles operating system events, is started by calling run. tick() invokes pyglet.window and schedules functions. pyglet.window and Window.on draw() To change the contents of a window, use Window.flip().

Subclassing EventLoop and overriding specific methods allows applications to incorporate another framework's run loop or customize processing in various ways. You shouldn't override run() in general because it contains platform-specific functionality that guarantees the program remains responsive to the user while consuming as little CPU as possible.
 

Methods
 

run()

Start processing events, functions that are scheduled, and window updates. When has exit is set to True, this procedure returns.
Overriding this function is prohibited since the implementation is platform-specific.

exit()

Safely exit the event loop at the conclusion of the current iteration.

This technique is the thread-safe counterpart of setting has exit to True. All threads that have been waiting for a response will be terminated.

sleep(timeout)

Wait for a certain period of time, or until exit() is invoked if the has exit flag is set. This is a thread-safe approach. The class's arguments are -

timeout (float) – The number of seconds to wait.

on_enter()

The event loop will begin shortly.

This is issued when the event loop is about to enter the main run loop, and it's an application's last chance to setup itself.

on_exit()

The event loop is about to come to an end.

The run() function returns after dispatching this event (the program may not truly quit if there is extra code after the run() invocation).

on_window_close(window)

A window had been shut.

When a window is closed, this event is triggered. If the close button on the window was pushed but the window did not close, it is not dispatched. If no more windows are open, the default handler exits (). This handler can be overridden if you want your application to quit based on a different policy.

Functions

run()

Start processing events, functions that are scheduled, and window updates.

exit()

Exit the application event loop.

If an event loop is presently operating, this command causes it to end. It is possible that the programme will not terminate (for example, there may be additional code following the run invocation).

Attributes

event_loop= <pyglet.app.base.EventLoop object>

The global event loop is a loop that runs indefinitely. Before invoking EventLoop, applications can substitute their own subclass of EventLoop. run().

platform_event_loop= <pyglet.app.base.PlatformEventLoop object>

The event loop is platform-dependent. This PlatformEventLoop object cannot be subclassed or replaced by applications.

windows= <_weakrefset.WeakSet object>

A collection of all open windows (including invisible windows). Instances of pyglet.window When this set is built, windows are automatically added to it. Because the set employs weak references, windows that are no longer referenced or explicitly closed are removed from the set.

Exceptions

classAppException

The AppException class is utilized to handle the various exception can that can occur.

Frequently Asked Questions

Why is pyglet used?

Pyglet is a multimedia library for Python used to build games and other visually rich applications. 

Is pyglet open source?

pyglet is provided under the BSD open-source license, allowing you to use it for both commercial and other open-source projects with very little restriction.

Is pyglet better than pygame?

Speed-wise, Pyglet is definitely faster than pygame and has better performance, and nowadays speed is always a concern when developing with a game.

What is pyglet.app?

pyglet.app provides application-wide functionality 

What are the different functions in pyglet.app? 

pyglet.app consists of two functions - run() and exit(). run() starts processing events, functions that are scheduled, and window updates. Whereas exit() is used to close the application.

Conclusion

In this article, we have extensively discussed pyglet.app and its classes, functions, and exceptions in detail. Having gone through this article, I am sure you must be excited to read similar blogs. Coding Ninjas has got you covered. Here are some similar blogs to redirect: What is pyglet.media, Pyglet, and Pyglet library. We hope that this blog has helped you enhance your knowledge, and if you wish to learn more, check out our Coding Ninjas Blog site and visit our Library. Here are some courses provided by Coding Ninjas: Basics of C++ with DSA, Competitive Programming, and MERN Stack Web Development. Do upvote our blog to help other ninjas grow. Happy Coding!