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# Copyright (C) 2015 James E. Blair <corvus@gnu.org>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
from __future__ import absolute_import, division, print_function
import urwid
class SlidePile(urwid.Pile):
def pack(self, size, focus=False):
cols = 0
rows = 0
for x in self.contents:
c,r = x[0].pack((size[0],))
if c>cols:
cols = c
rows += r
return (cols, rows)
class SlidePadding(urwid.Padding):
def pack(self, size, focus=False):
r = self._original_widget.pack(size, focus)
width = max(r[0] + self.left + self.right, self.min_width or 0)
width = min(size[0], width)
return (width, r[1])
class SlideColumns(urwid.Columns):
def pack(self, size, focus=False):
cols = self.dividechars * (len(self.contents)-1)
rows = 0
for widget, packing in self.contents:
if packing[0] == 'given':
allocated_cols = packing[1]
else:
allocated_cols = size[0]
c,r = widget.pack((allocated_cols,))
if packing[0] == 'given':
c = allocated_cols
if r>rows:
rows = r
cols += c
return (cols, rows)
class SlideFiller(urwid.Filler):
pass
class ScreenHinter(object):
# A terrible hack to try to provide some needed context to the
# image widget.
def __init__(self, screen=None):
self.screen = screen
def setScreen(self, screen):
self.screen = screen
def getSize(self):
cols, rows = self.screen.get_cols_rows()
return (cols, rows-1)
class Handout(urwid.WidgetWrap):
def __init__(self, widget, background):
self.background = background
self.pad = SlidePadding(widget, align='center', width='pack')
self.map = urwid.AttrMap(self.pad, self.background)
super(Handout, self).__init__(self.map)
class UrwidSlide(urwid.WidgetWrap):
def __init__(self, title, transition, widget, background):
self.title = title
self.transition = transition
self.fill = SlideFiller(widget)
self.background = background
self.map = urwid.AttrMap(self.fill, self.background)
self.handout = None
self.animations = []
self.progressives = []
self.progressive_attr = None
self.progressive_state = 0
super(UrwidSlide, self).__init__(self.map)
def startAnimation(self, loop):
for x in self.animations:
x.startAnimation(loop)
def stopAnimation(self):
for x in self.animations:
x.stopAnimation()
def resetAnimation(self):
for x in self.animations:
x.resetAnimation()
def resetProgressive(self, on=False):
if on:
self.progressive_state = len(self.progressives)
for x in self.progressives:
x.set_attr_map({None: None})
else:
self.progressive_state = 0
for x in self.progressives:
x.set_attr_map({None: self.progressive_attr})
def nextProgressive(self):
if self.progressive_state >= len(self.progressives):
return False
self.progressives[self.progressive_state].set_attr_map(
{None: None})
self.progressive_state += 1
return True
def prevProgressive(self):
if self.progressive_state <= 0:
return False
self.progressive_state -= 1
self.progressives[self.progressive_state].set_attr_map(
{None: self.progressive_attr})
return True
def setProgressive(self, state):
self.progressive_state = state
for i, x in enumerate(self.progressives):
if i < self.progressive_state:
x.set_attr_map({None: None})
else:
x.set_attr_map({None: self.progressive_attr})
class AnimatedText(urwid.Text):
def __init__(self, interval=0.5, oneshot=False):
super(AnimatedText, self).__init__(u'')
self.frames = []
self.current = 0
self.running = False
self.interval = interval
self.oneshot = oneshot
def addFrame(self, text):
self.frames.append(text)
if len(self.frames) == self.current+1:
self.set_text(text)
def startAnimation(self, loop):
if self.running:
return
if len(self.frames) == 1:
return
self.running = True
loop.set_alarm_in(self.interval, self.updateCallback)
def updateCallback(self, loop=None, data=None):
if not self.running:
return
if self.current+1 >= len(self.frames):
if self.oneshot:
self.running = False
return
self.current = 0
else:
self.current += 1
self.set_text(self.frames[self.current])
loop.set_alarm_in(self.interval, self.updateCallback)
def stopAnimation(self):
if not self.running:
return
self.running = False
def resetAnimation(self):
self.current = 0
self.set_text(self.frames[self.current])
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