sudhanshu gautam wrote:
1.import pyglet
window=pyglet.window.Window()
lable=pyglet.text.Lable('Hello, world',
font_name='Times New Roman',
font_size=36,
x=window.width//2, y=window.height//2,
anchor_x='center', anchor_y='center')
*[email protected] *
def on_draw():
window.clear()
label.draw()
pyglet.app.run()
okay I just drop second example just tell me why we are using that all
the code that is showed in RED color .
I never used pyglet, but by reading the documentation it seems that the
decorator is used to register the on_draw() function to the event loop.
As you know, decorator is merely a syntax sugar for calling a function
like this:
def on_draw():
...
on_draw = window.event(on_draw)
I guess the function window.event is the function to register the
on_draw() function as the event handler of the window event. In this
specific case, the window.event() internally will call the
window.set_handler() with the appropriate arguments.
My guess is the window.event() function contains something similar to this:
def event(self, f):
window.add_handler(f.__name__, f)
return f
(of course with a bit more elaborations since it seems it also accept
string argument to replace the f.__name__)
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