1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
"""
Copyright 2008-2011,2015 Free Software Foundation, Inc.
This file is part of GNU Radio
GNU Radio Companion is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
GNU Radio Companion is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
"""
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import GLib
from .Constants import POSSIBLE_ROTATIONS, CANVAS_GRID_SIZE
def get_rotated_coordinate(coor, rotation):
"""
Rotate the coordinate by the given rotation.
Args:
coor: the coordinate x, y tuple
rotation: the angle in degrees
Returns:
the rotated coordinates
"""
# handles negative angles
rotation = (rotation + 360)%360
if rotation not in POSSIBLE_ROTATIONS:
raise ValueError('unusable rotation angle "%s"'%str(rotation))
# determine the number of degrees to rotate
cos_r, sin_r = {
0: (1, 0), 90: (0, 1), 180: (-1, 0), 270: (0, -1),
}[rotation]
x, y = coor
return x * cos_r + y * sin_r, -x * sin_r + y * cos_r
def get_angle_from_coordinates((x1, y1), (x2, y2)):
"""
Given two points, calculate the vector direction from point1 to point2, directions are multiples of 90 degrees.
Args:
(x1,y1): the coordinate of point 1
(x2,y2): the coordinate of point 2
Returns:
the direction in degrees
"""
if y1 == y2: # 0 or 180
return 0 if x2 > x1 else 180
else: # 90 or 270
return 270 if y2 > y1 else 90
def encode(value):
"""Make sure that we pass only valid utf-8 strings into markup_escape_text.
Older versions of glib seg fault if the last byte starts a multi-byte
character.
"""
valid_utf8 = value.decode('utf-8', errors='replace').encode('utf-8')
return GLib.markup_escape_text(valid_utf8)
def align_to_grid(coor, mode=round):
def align(value):
return int(mode(value / (1.0 * CANVAS_GRID_SIZE)) * CANVAS_GRID_SIZE)
try:
return map(align, coor)
except TypeError:
x = coor
return align(coor)
|
