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Diffstat (limited to 'src/jarabe/view/pulsingicon.py')
| -rw-r--r-- | src/jarabe/view/pulsingicon.py | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/src/jarabe/view/pulsingicon.py b/src/jarabe/view/pulsingicon.py new file mode 100644 index 0000000..499ae99 --- /dev/null +++ b/src/jarabe/view/pulsingicon.py @@ -0,0 +1,223 @@ +# 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.style import Color + +_INTERVAL = 100 +_STEP = math.pi / 10 # must be a fraction of pi, for clean caching + +class Pulser(object): + def __init__(self, icon): + self._pulse_hid = None + self._icon = icon + self._level = 0 + self._phase = 0 + + 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) + + 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.base_color + + def update(self): + if self._icon.pulsing: + base_color = self._icon.base_color + pulse_color = self._icon.pulse_color + + base_stroke = self._get_as_rgba(base_color.get_stroke_color()) + pulse_stroke = self._get_as_rgba(pulse_color.get_stroke_color()) + base_fill = self._get_as_rgba(base_color.get_fill_color()) + pulse_fill = self._get_as_rgba(pulse_color.get_fill_color()) + + self._icon.stroke_color = \ + self._get_color(base_stroke, pulse_stroke).get_svg() + self._icon.fill_color = \ + self._get_color(base_fill, pulse_fill).get_svg() + else: + self._icon.xo_color = self._icon.base_color + + def _get_as_rgba(self, html_color): + if html_color == 'none': + return Color('#FFFFFF', alpha=1.0).get_rgba() + else: + return Color(html_color).get_rgba() + + def _get_color(self, orig_color, target_color): + next_point = (orig_color[0] + + self._level * (target_color[0] - orig_color[0]), + orig_color[1] + + self._level * (target_color[1] - orig_color[1]), + orig_color[2] + + self._level * (target_color[2] - orig_color[2])) + + return Color('#%02x%02x%02x' % (int(next_point[0] * 255), + int(next_point[1] * 255), + int(next_point[2] * 255))) + + def __pulse_cb(self): + self._phase += _STEP + self._level = (math.sin(self._phase) + 1) / 2 + 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 + + 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): + 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) + + 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() + 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) |