demos/py_simple/backends.py

   1 #!/usr/bin/env python
   2
   3 import sys
   4
   5 import gfxprim.core as core
   6 import gfxprim.backends as backends
   7 import gfxprim.gfx as gfx
   8 import gfxprim.text as text
   9 import gfxprim.input as input
  10
  11 def redraw(bk):
  12     c = bk.context
  13
  14     black = c.RGBToPixel(0, 0, 0)
  15     white = c.RGBToPixel(0xff, 0xff, 0xff)
  16
  17     c.gfx.Fill(black)
  18
  19     align = text.C.ALIGN_CENTER | text.C.VALIGN_CENTER
  20     c.text.Text(None, c.w//2, c.h//2, align, white, black, "Hello World!")
  21
  22     bk.Flip()
  23
  24 def main():
  25     backend_string = "X11:100x100"
  26
  27     if len(sys.argv) == 2:
  28         backend_string = sys.argv[1]
  29
  30     if len(sys.argv) > 2:
  31         print("Usage: %s [backend init string]" % sys.argv[0])
  32         sys.exit(1)
  33
  34     # Create backend window
  35     bk = backends.BackendInit(backend_string, "Backend Example")
  36     assert(bk)
  37
  38     redraw(bk)
  39
  40     # Event loop
  41     while True:
  42         ev = bk.WaitEvent()
  43
  44         input.EventDump(ev)
  45
  46         if (ev.type == input.EV_KEY):
  47            sys.exit(0)
  48         elif (ev.type == input.EV_SYS):
  49            if (ev.code == input.EV_SYS_QUIT):
  50                sys.exit(0)
  51            if (ev.code == input.EV_SYS_RESIZE):
  52                bk.ResizeAck()
  53                redraw(bk)
  54
  55 if __name__ == '__main__':
  56     main()