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# libavg - Media Playback Engine.
# Copyright (C) 2003-2014 Ulrich von Zadow
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Current versions can be found at www.libavg.de
#
import os
from libavg import avg, player
from app.touchvisualization import *
class KeysCaptionNode(avg.DivNode):
def __init__(self, parent=None, **kwargs):
super(KeysCaptionNode, self).__init__(**kwargs)
self.registerInstance(self, parent)
self.sensitive = False
self.opacity = 0
self.__background = avg.RectNode(fillcolor='000000', fillopacity=0.6,
opacity=0, size=(450, 450), parent=self)
self.__keysNode = avg.WordsNode(pos=(10, 10), fontsize=18,
color='DDDDDD', parent=self)
self.__isShown = False
def toggleHelp(self):
self.__isShown = not self.__isShown
keys = g_KbManager.getActiveKeyBindings()
if self.__isShown:
helpText = '<span><b> ACTIVE KEYS </b><br/></span>'
for keyObj in sorted(keys, key=lambda ko: ko.key):
if keyObj.state == 'up':
stateAddition = ' (up)'
else:
stateAddition = ''
helpText += ('<span><b>%s</b> '
'<small>%s%s</small></span><br/>' % (keyObj.key,
keyObj.description, stateAddition))
self.__keysNode.text = helpText
self.opacity = 1
self.__background.size = self.__keysNode.getMediaSize()
self.getParent().reorderChild(
self.getParent().indexOf(self),
self.getParent().getNumChildren()-1)
else:
self.__keysNode.text = ''
self.opacity = 0
class KeyBinding(object):
def __init__(self, key, description, state, callback):
if not isinstance(key, unicode) and not isinstance(key, str):
raise TypeError('KeyBinding key should be either a string or unicode object')
self.__key = key
self.__description = description
self.__state = state
self.__callback = callback
def __repr__(self):
return '<%s key=%s (%s) state=%s>' % (self.__class__.__name__,
self.__key, self.__description, self.__state)
@property
def key(self):
return self.__key
@property
def description(self):
return self.__description
@property
def state(self):
return self.__state
def checkKey(self, key, state):
if state is not None and self.__state != state:
return False
return self.__key == key
def checkEvent(self, event, state):
if self.__state != state:
return False
if isinstance(self.__key, unicode):
return self.__key == unichr(event.unicode)
else:
return self.__key == event.keystring
def executeCallback(self):
self.__callback()
class KeyboardManager(object):
_instance = None
TOGGLE_HELP_UNICODE = 63
def __init__(self):
if self._instance is not None:
raise RuntimeError('KeyboardManager has been already instantiated')
self.__keyBindings = []
self.__keyBindingsStack = []
self.__onKeyDownCb = lambda e: False
self.__onKeyUpCb = lambda e: False
self.__keyCaptionsNode = None
KeyboardManager._instance = self
@classmethod
def get(cls):
if cls._instance is None:
cls()
return cls._instance
def setup(self, onKeyDownCb, onKeyUpCb):
player.subscribe(avg.Player.KEY_DOWN, self.__onKeyDown)
player.subscribe(avg.Player.KEY_UP, self.__onKeyUp)
self.__onKeyDownCb = onKeyDownCb
self.__onKeyUpCb = onKeyUpCb
self.__keyCaptionsNode = KeysCaptionNode(pos=(5,5), parent=player.getRootNode())
def teardown(self):
self.__keyBindings = []
self.__keyCaptionsNode.unlink(True)
del self.__keyCaptionsNode
self.__keyCaptionsNode = None
def push(self):
self.__keyBindingsStack.append(self.__keyBindings)
self.__keyBindings = []
def pop(self):
if not self.__keyBindingsStack:
raise RuntimeError('Empty stack')
self.__keyBindings = self.__keyBindingsStack.pop()
def getActiveKeyBindings(self):
return self.__keyBindings
def bindKey(self, key, func, funcName, state='down'):
import warnings
warnings.warn('libavg.KeyboardManager is deprecated, use '
'libavg.app.keyboardmanager instead')
if isinstance(key, unicode) and state != 'down':
raise RuntimeError('bindKey() with unicode keys '
'can be used only with state=down')
if key == unichr(self.TOGGLE_HELP_UNICODE):
raise RuntimeError('%s key is reserved')
keyObj = self.__findKeyByKeystring(key, state)
if keyObj is not None:
raise RuntimeError('Key %s has already been bound (%s)' % (key, keyObj))
self.__keyBindings.append(KeyBinding(key, funcName, state, func))
def unbindKey(self, key):
keyObj = self.__findKeyByKeystring(key)
if keyObj is not None:
self.__keyBindings.remove(keyObj)
else:
raise KeyError('Key %s not found' % key)
def bindUnicode(self, key, func, funcName, state='down'):
raise DeprecationWarning('Use bindKey() passing an unicode object as keystring')
def __findKeyByEvent(self, event, state):
for keyObj in self.__keyBindings:
if keyObj.checkEvent(event, state):
return keyObj
return None
def __findKeyByKeystring(self, key, state=None):
for keyObj in self.__keyBindings:
if keyObj.checkKey(key, state):
return keyObj
return None
def __onKeyDown(self, event):
if self.__onKeyDownCb(event):
return
elif event.unicode == self.TOGGLE_HELP_UNICODE:
self.__keyCaptionsNode.toggleHelp()
else:
keyObj = self.__findKeyByEvent(event, 'down')
if keyObj is not None:
keyObj.executeCallback()
def __onKeyUp(self, event):
if self.__onKeyUpCb(event):
return
else:
keyObj = self.__findKeyByEvent(event, 'up')
if keyObj is not None:
keyObj.executeCallback()
g_KbManager = KeyboardManager.get()
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