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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
# Copyright (C) 2008 One Laptop Per Child
#
# This program 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.
#
# This program 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 St, Fifth Floor, Boston, MA 02110-1301 USA
import math
import gobject
from sugar.graphics.icon import Icon, CanvasIcon
from sugar.graphics import style
_INTERVAL = 100
_STEP = math.pi / 10 # must be a fraction of pi, for clean caching
_MINIMAL_ALPHA_VALUE = 0.33
class Pulser(object):
def __init__(self, icon):
self._pulse_hid = None
self._icon = icon
self._phase = 0
self._start_scale = 1.0
self._end_scale = 1.0
self._zoom_steps = 1
self._current_zoom_step = 1
self._current_scale_step = 1
def set_zooming(self, start_scale, end_scale, zoom_steps):
""" Set start and end scale and number of steps in zoom animation """
self._start_scale = start_scale
self._end_scale = end_scale
self._zoom_steps = zoom_steps
self._current_scale_step = abs(self._start_scale - self._end_scale) / \
self._zoom_steps
self._icon.scale = self._start_scale
def start(self, restart=False):
if restart:
self._phase = 0
if self._pulse_hid is None:
self._pulse_hid = gobject.timeout_add(_INTERVAL, self.__pulse_cb)
if self._start_scale != self._end_scale:
self._icon.scale = self._start_scale + \
self._current_scale_step * self._current_zoom_step
def stop(self):
if self._pulse_hid is not None:
gobject.source_remove(self._pulse_hid)
self._pulse_hid = None
self._icon.xo_color = self._icon.get_base_color()
self._phase = 0
self._icon.alpha = 1.0
def update(self):
self._icon.xo_color = self._icon.base_color
self._icon.alpha = _MINIMAL_ALPHA_VALUE + \
(1 - _MINIMAL_ALPHA_VALUE) * (math.cos(self._phase) + 1) / 2
def __pulse_cb(self):
self._phase += _STEP
if self._current_zoom_step <= self._zoom_steps and \
self._start_scale != self._end_scale:
self._icon.scale = self._start_scale + \
self._current_scale_step * self._current_zoom_step
self._current_zoom_step += 1
self.update()
return True
class PulsingIcon(Icon):
__gtype_name__ = 'SugarPulsingIcon'
def __init__(self, **kwargs):
self._pulser = Pulser(self)
self._base_color = None
self._pulse_color = None
self._paused = False
self._pulsing = False
Icon.__init__(self, **kwargs)
self._palette = None
self.connect('destroy', self.__destroy_cb)
def set_pulse_color(self, pulse_color):
self._pulse_color = pulse_color
self._pulser.update()
def get_pulse_color(self):
return self._pulse_color
pulse_color = gobject.property(
type=object, getter=get_pulse_color, setter=set_pulse_color)
def set_base_color(self, base_color):
self._base_color = base_color
self._pulser.update()
def get_base_color(self):
return self._base_color
def set_zooming(self, start_size=style.SMALL_ICON_SIZE,
end_size=style.XLARGE_ICON_SIZE,
zoom_steps=10):
if start_size > end_size:
start_scale = 1.0
end_scale = float(end_size) / start_size
else:
start_scale = float(start_size) / end_size
end_scale = 1.0
self._pulser.set_zooming(start_scale, end_scale, zoom_steps)
base_color = gobject.property(
type=object, getter=get_base_color, setter=set_base_color)
def set_paused(self, paused):
self._paused = paused
if self._paused:
self._pulser.stop()
else:
self._pulser.start(restart=False)
def get_paused(self):
return self._paused
paused = gobject.property(
type=bool, default=False, getter=get_paused, setter=set_paused)
def set_pulsing(self, pulsing):
self._pulsing = pulsing
if self._pulsing:
self._pulser.start(restart=True)
else:
self._pulser.stop()
def get_pulsing(self):
return self._pulsing
pulsing = gobject.property(
type=bool, default=False, getter=get_pulsing, setter=set_pulsing)
def _get_palette(self):
return self._palette
def _set_palette(self, palette):
if self._palette is not None:
self._palette.props.invoker = None
self._palette = palette
palette = property(_get_palette, _set_palette)
def __destroy_cb(self, icon):
self._pulser.stop()
if self._palette is not None:
self._palette.destroy()
class CanvasPulsingIcon(CanvasIcon):
__gtype_name__ = 'SugarCanvasPulsingIcon'
def __init__(self, **kwargs):
self._pulser = Pulser(self)
self._base_color = None
self._pulse_color = None
self._paused = False
self._pulsing = False
CanvasIcon.__init__(self, **kwargs)
self.connect('destroy', self.__destroy_cb)
def __destroy_cb(self, box):
self._pulser.stop()
def set_pulse_color(self, pulse_color):
self._pulse_color = pulse_color
self._pulser.update()
def get_pulse_color(self):
return self._pulse_color
pulse_color = gobject.property(
type=object, getter=get_pulse_color, setter=set_pulse_color)
def set_base_color(self, base_color):
self._base_color = base_color
self._pulser.update()
def get_base_color(self):
return self._base_color
base_color = gobject.property(
type=object, getter=get_base_color, setter=set_base_color)
def set_paused(self, paused):
self._paused = paused
if self._paused:
self._pulser.stop()
elif self._pulsing:
self._pulser.start(restart=False)
def get_paused(self):
return self._paused
paused = gobject.property(
type=bool, default=False, getter=get_paused, setter=set_paused)
def set_pulsing(self, pulsing):
self._pulsing = pulsing
if self._paused:
return
if self._pulsing:
self._pulser.start(restart=True)
else:
self._pulser.stop()
def get_pulsing(self):
return self._pulsing
pulsing = gobject.property(
type=bool, default=False, getter=get_pulsing, setter=set_pulsing)
|
