2 Copyright 2008, 2009 Free Software Foundation, Inc.
3 This file is part of GNU Radio
5 GNU Radio Companion is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 GNU Radio Companion is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
20 from Constants import POSSIBLE_ROTATIONS
21 from Cheetah.Template import Template
23 def get_rotated_coordinate(coor, rotation):
25 Rotate the coordinate by the given rotation.
26 @param coor the coordinate x, y tuple
27 @param rotation the angle in degrees
28 @return the rotated coordinates
30 #handles negative angles
31 rotation = (rotation + 360)%360
32 assert rotation in POSSIBLE_ROTATIONS
33 #determine the number of degrees to rotate
41 return (x*cos_r + y*sin_r, -x*sin_r + y*cos_r)
43 def get_angle_from_coordinates((x1,y1), (x2,y2)):
45 Given two points, calculate the vector direction from point1 to point2, directions are multiples of 90 degrees.
46 @param (x1,y1) the coordinate of point 1
47 @param (x2,y2) the coordinate of point 2
48 @return the direction in degrees
54 if y2 > y1: return 270
57 def xml_encode(string):
59 Encode a string into an xml safe string by replacing special characters.
60 Needed for gtk pango markup in labels.
61 @param string the input string
62 @return output string with safe characters
71 ): string = string.replace(char, safe)
74 def parse_template(tmpl_str, **kwargs):
76 Parse the template string with the given args.
77 Pass in the xml encode method for pango escape chars.
78 @param tmpl_str the template as a string
79 @return a string of the parsed template
81 kwargs['encode'] = xml_encode
82 return str(Template(tmpl_str, kwargs))