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#!/usr/bin/python
# Python 2/3 compatibility.
from __future__ import print_function
import sys
import os
# Change path so we find Xlib
sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
from Xlib import display, X, threaded
import time
import thread
def redraw(win, gc):
# win.clear_area()
win.fill_rectangle(gc, 20, 20, 60, 60)
def blink(display, win, gc, cols):
while 1:
time.sleep(2)
print('Changing color', cols[0])
gc.change(foreground = cols[0])
cols = (cols[1], cols[0])
redraw(win, gc)
display.flush()
def main():
d = display.Display()
root = d.screen().root
colormap = d.screen().default_colormap
red = colormap.alloc_named_color("red").pixel
blue = colormap.alloc_named_color("blue").pixel
background = colormap.alloc_named_color("white").pixel
window = root.create_window(100, 100, 100, 100, 1,
X.CopyFromParent, X.InputOutput,
X.CopyFromParent,
background_pixel = background,
event_mask = X.StructureNotifyMask | X.ExposureMask)
window.map()
gc = window.create_gc(foreground = red)
thread.start_new_thread(blink, (d, window, gc, (blue, red)))
while 1:
event = d.next_event()
if event.type == X.Expose:
if event.count == 0:
redraw(window, gc)
elif event.type == X.DestroyNotify:
sys.exit(0)
if __name__ == "__main__":
main()
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