# Copyright (C) 2006-2008, TamTam Team
#
# 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
# Widget was copy&pasted from TamTam activities
import gtk
import rsvg
import cairo
from sugar.graphics import style
class TempoSlider(gtk.HBox):
def __init__(self, min_value, max_value):
gtk.HBox.__init__(self)
self._pixbuf = [None] * 8
self._image = gtk.Image()
self._image.show()
# used to store tempo updates while the slider is active
self._delayed = 0
self._active = False
self.adjustment = gtk.Adjustment(min_value, min_value, max_value,
(max_value - min_value) / 8, (max_value - min_value) / 8, 0)
self._adjustment_h = self.adjustment.connect('value-changed',
self._changed_cb)
slider = gtk.HScale(adjustment = self.adjustment)
slider.show()
slider.set_draw_value(False)
slider.connect("button-press-event", self._press_cb)
slider.connect("button-release-event", self._release_cb)
self.pack_start(slider, True, True)
self.pack_end(self._image, False, False)
def set_value(self, tempo, quiet = False):
if self._active:
self._delayed = tempo
elif quiet:
self.adjustment.handler_block(self._adjustment_h)
self.adjustment.set_value(tempo)
self._update(tempo)
self.adjustment.handler_unblock(self._adjustment_h)
else:
self.adjustment.set_value(tempo)
def _changed_cb(self, widget):
self._update(widget.get_value())
def _update(self, tempo):
def map_range(value, ilower, iupper, olower, oupper):
if value == iupper:
return oupper
return olower + int((oupper-olower+1) * (value-ilower) /
float(iupper-ilower))
img = map_range(tempo, self.adjustment.lower,
self.adjustment.upper, 0, 7)
if not self._pixbuf[img]:
svg = rsvg.Handle(data=IMAGE[img])
self._pixbuf[img] = _from_svg_at_size(handle=svg,
width=style.STANDARD_ICON_SIZE,
height=style.STANDARD_ICON_SIZE)
self._image.set_from_pixbuf(self._pixbuf[img])
def _press_cb(self, widget, event):
self._active = True
def _release_cb(self, widget, event):
self._active = False
if self._delayed != 0:
self.set_value(self._delayed, True)
self._delayed = 0
def _from_svg_at_size(filename=None, width=None, height=None, handle=None,
keep_ratio=True):
""" import from pixbuf.py """
if not handle:
handle = rsvg.Handle(filename)
dimensions = handle.get_dimension_data()
icon_width = dimensions[0]
icon_height = dimensions[1]
if icon_width != width or icon_height != height:
ratio_width = float(width) / icon_width
ratio_height = float(height) / icon_height
if keep_ratio:
ratio = min(ratio_width, ratio_height)
if ratio_width != ratio:
ratio_width = ratio
width = int(icon_width * ratio)
elif ratio_height != ratio:
ratio_height = ratio
height = int(icon_height * ratio)
else:
ratio_width = 1
ratio_height = 1
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
context = cairo.Context(surface)
context.scale(ratio_width, ratio_height)
handle.render_cairo(context)
loader = gtk.gdk.pixbuf_loader_new_with_mime_type('image/png')
surface.write_to_png(loader)
loader.close()
return loader.get_pixbuf()
IMAGE = [None] * 8
IMAGE[0] = """
"""
IMAGE[1] = """
"""
IMAGE[2] = """
"""
IMAGE[3] = """
"""
IMAGE[4] = """
"""
IMAGE[5] = """
"""
IMAGE[6] = """
"""
IMAGE[7] = """
"""