1# This file is part of Xpra. 

2# Copyright (C) 2019 Antoine Martin <antoine@xpra.org> 

3# Xpra is released under the terms of the GNU GPL v2, or, at your option, any 

4# later version. See the file COPYING for details. 

5 

6import math 

7from OpenGL.GL import ( 

8 glBegin, glEnd, 

9 glVertex2i, glColor4f, 

10 GL_POLYGON, 

11 ) 

12 

13from xpra.os_util import monotonic_time 

14from xpra.client.spinner import cv 

15 

16 

17def draw_spinner(bw, bh): 

18 dim = min(bw/3.0, bh/3.0) 

19 t = monotonic_time() 

20 count = int(t*4.0) 

21 bx = bw//2 

22 by = bh//2 

23 for i in range(8): #8 lines 

24 c = cv.trs[count%8][i] 

25 mi1 = math.pi*i/4-math.pi/16 

26 mi2 = math.pi*i/4+math.pi/16 

27 si1 = math.sin(mi1) 

28 si2 = math.sin(mi2) 

29 ci1 = math.cos(mi1) 

30 ci2 = math.cos(mi2) 

31 glBegin(GL_POLYGON) 

32 glColor4f(c, c, c, 1) 

33 glVertex2i(int(bx+si1*10), int(by+ci1*10)) 

34 glVertex2i(int(bx+si1*dim), int(by+ci1*dim)) 

35 glVertex2i(int(bx+si2*dim), int(by+ci2*dim)) 

36 glVertex2i(int(bx+si2*10), int(by+ci2*10)) 

37 glEnd()