Hi. I'm new to pyglet and having a little difficulty understanding how
pyglet.app.run() updates multiple windows, particularly windows that are
not the active window.
I am trying to write a simple program that does the following.
1. Creates 2 windows that are initially colored all white.
2. If the user presses the key "1", it should toggle the first window
between white and black and print "1" to the console.
3. If the user presses the key "2", it should toggle the second window
between white and black and print "2" to the console
The toggling behavior should occur for either window regardless of what
window is active (i.e., if window 1 is active and the user presses "2", the
color of window 2 should toggle)
import pyglet
from pyglet.window import key
from pyglet.gl import *
class ToggleWindow(pyglet.window.Window):
def __init__(self):
super(ToggleWindow, self).__init__()
self.color = 1.0
def toggle(self):
if self.color == 1.0:
self.color = 0.0
else:
self.color = 1.0
def on_draw(self):
self.switch_to()
glClear(GL_COLOR_BUFFER_BIT)
glLoadIdentity()
glColor3f(self.color,self.color,self.color)
glBegin(GL_QUADS)
glVertex2f(0,0)
glVertex2f(self.width,0)
glVertex2f(self.width,self.height)
glVertex2f(0,self.height)
glEnd()
def main():
window1 = ToggleWindow()
window2 = ToggleWindow()
@window1.event
@window2.event
def on_key_press(symbol, modifiers):
if symbol == key._1:
print(1)
window1.toggle()
elif symbol == key._2:
print(2)
window2.toggle()
else:
print(symbol)
pyglet.app.run()
if __name__ == "__main__":
main()
The problem is that only the active window color will toggle. Is there some
event I have to dispatch to get the render loop to redraw an inactive
window? I thought maybe the "switch_to()" method would do this but I guess
it only changes the opengl context?
I can get the program to work as intended if I replace pyglet.app.run()
with a manual render loop like I might do in SDL, but this is obviously the
sort of thing pyglet is designed to avoid.
while True:
pyglet.clock.tick()
for window in pyglet.app.windows:
window.switch_to()
window.dispatch_events()
window.dispatch_event('on_draw')
window.flip()
Any thoughts? I am on linux if it is relevant.
Thanks in advance for any help.
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