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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# 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
#
# Original author of this module: Thomas Schott <scotty at c-base dot org>
#
import os.path
from libavg import avg, player
FEEDBACK_ZOOM_FACTOR = 1.0
# XXX Merge with base.bmpFromSrc()
def _bmpFromSrc(node, src):
if isinstance(src, basestring):
if os.path.isabs(src):
effectiveSrc = src
else:
effectiveSrc = node.getParent().getEffectiveMediaDir() + src
return avg.Bitmap(effectiveSrc)
elif isinstance(src, avg.Bitmap):
return src
elif src is None:
return None
else:
raise RuntimeError("src must be a string or a Bitmap.")
class Key(avg.DivNode):
# KeyDef is (keyCode, pos, size, isCommand=False)
def __init__(self, keyDef, downBmp, feedbackBmp, sticky=False, parent=None,
**kwargs):
self.__keyCode = keyDef[0]
if not(isinstance(self.__keyCode, tuple)):
self.__keyCode = (self.__keyCode,)
kwargs['pos'] = avg.Point2D(keyDef[1])
kwargs['size'] = avg.Point2D(keyDef[2])
if len(keyDef) == 4:
self.__isCommand = keyDef[3]
else:
self.__isCommand = False
super(Key, self).__init__(**kwargs)
self.registerInstance(self, parent)
self.__sticky = sticky
self.__stickyIsDown = False
self.__cursorID = None
if downBmp:
if player.isPlaying():
self.__createImages(downBmp, feedbackBmp)
else:
player.subscribe(avg.Player.PLAYBACK_START,
lambda: self.__createImages(downBmp, feedbackBmp))
def reset(self):
if self.__sticky:
self.__image.opacity = 0.0
self.__stickyIsDown = False
def isCommand(self):
return self.__isCommand
def getCode(self):
return self.__keyCode
def isStickyDown(self):
return self.__sticky and self.__stickyIsDown
def onDown(self, event):
if self.__cursorID:
return
self.__cursorID = event.cursorid
self.__image.opacity = 1.0
def onUp(self, event):
if not self.__cursorID == event.cursorid:
return
if self.__sticky:
self.__stickyIsDown = not(self.__stickyIsDown)
if not self.__stickyIsDown:
self.__image.opacity = 0.0
else:
self.__image.opacity = 0.0
self.__cursorID = None
def onOut(self, event):
if not self.__cursorID == event.cursorid:
return
if not(self.__sticky) or (not self.__stickyIsDown):
self.__cursorID = None
self.__image.opacity = 0.0
def showFeedback(self, show):
if show:
self.__feedbackImage.opacity = 0.95
else:
self.__feedbackImage.opacity = 0.0
def __createImages(self, downBmp, feedbackBmp):
self.__image = avg.ImageNode(parent=self, opacity=0.0)
self.__createImage(self.__image, downBmp, 1)
self.__feedbackImage = avg.ImageNode(parent=self, opacity=0.0)
if feedbackBmp and not(self.__isCommand):
self.__createImage(self.__feedbackImage, feedbackBmp, 2)
self.__feedbackImage.pos = (-self.size.x/2, -self.size.y/3 - \
self.__feedbackImage.size.y)
def __createImage(self, node, bmp, sizeFactor):
canvas = player.createCanvas(id="keycanvas", size=self.size*sizeFactor)
canvasImage = avg.ImageNode(pos=-self.pos*sizeFactor, parent=canvas.getRootNode())
canvasImage.setBitmap(bmp)
canvas.render()
node.setBitmap(canvas.screenshot())
player.deleteCanvas('keycanvas')
class Keyboard(avg.DivNode):
DOWN = avg.Publisher.genMessageID()
UP = avg.Publisher.genMessageID()
CHAR = avg.Publisher.genMessageID()
def __init__(self, bgSrc, downSrc, keyDefs, shiftKeyCode, altGrKeyCode=None,
stickyShift=False, feedbackSrc=None, parent=None, **kwargs):
super(Keyboard, self).__init__(**kwargs)
self.registerInstance(self, parent)
self.__shiftKeyCode = shiftKeyCode
self.__shiftDownCounter = 0
self.__stickyShift = stickyShift
self.__altGrKeyCode = altGrKeyCode
self.__altGrKeyCounter = 0
if not(self.__shiftKeyCode) and self.__altGrKeyCode:
raise RuntimeError(
"Keyboard: If there is an altgr key, there must also be a shift key.")
self.__codesPerKey = 1
if self.__shiftKeyCode:
self.__codesPerKey = 2
if self.__altGrKeyCode:
self.__codesPerKey = 3
self.__keys = []
if bgSrc:
bgNode = avg.ImageNode(parent=self)
bgNode.setBitmap(_bmpFromSrc(self, bgSrc))
for kd in keyDefs:
downBmp = _bmpFromSrc(self, downSrc)
feedbackBmp = _bmpFromSrc(self, feedbackSrc)
if isinstance(kd[0], tuple):
while len(kd[0]) < self.__codesPerKey:
kd[0] += (kd[0][0],)
key = Key(kd, downBmp, feedbackBmp, parent=self)
else:
sticky =(self.__stickyShift and
(self.__shiftKeyCode == kd[0] or self.__altGrKeyCode == kd[0]))
key = Key(kd, downBmp, feedbackBmp, sticky=sticky, parent=self)
self.__keys.append(key)
self.subscribe(avg.Node.CURSOR_DOWN, self.__onCursorDown)
self.__curKeys = {}
self.__feedbackKey = None
self.publish(Keyboard.DOWN)
self.publish(Keyboard.UP)
self.publish(Keyboard.CHAR)
@classmethod
def makeRowKeyDefs(cls, startPos, keySize, spacing, keyStr, shiftKeyStr,
altGrKeyStr=None):
keyDefs = []
curPos = avg.Point2D(startPos)
offset = keySize[0]+spacing
if (len(shiftKeyStr) != len(keyStr) or
(altGrKeyStr and len(altGrKeyStr) != len(keyStr))):
raise RuntimeError("makeRowKeyDefs string lengths must be identical.")
for i in xrange(len(keyStr)):
if altGrKeyStr:
codes = (keyStr[i], shiftKeyStr[i], altGrKeyStr[i])
else:
codes = (keyStr[i], shiftKeyStr[i])
keyDefs.append([codes, curPos, avg.Point2D(keySize), False])
curPos = (curPos[0]+offset, curPos[1])
return keyDefs
def reset(self):
for key in self.__keys:
key.reset()
self.__shiftDownCounter = 0
self.__altGrKeyCounter = 0
def __onCursorDown(self, event):
curKey = self.__findKey(event.pos)
self.__keyDown(curKey, event)
event.contact.subscribe(avg.Contact.CURSOR_MOTION, self.__onCursorMotion)
event.contact.subscribe(avg.Contact.CURSOR_UP, self.__onCursorUp)
def __onCursorMotion(self, event):
newKey = self.__findKey(event.pos)
oldKey = self.__curKeys[event.contact]
if newKey != oldKey:
if oldKey:
oldKey.onOut(event)
self.notifySubscribers(Keyboard.UP, [oldKey.getCode()[0]])
if oldKey.isCommand():
self.__onCommandKeyUp(oldKey)
self.__keyDown(newKey, event)
def __onCursorUp(self, event):
self.__onCursorMotion(event)
key = self.__curKeys[event.contact]
if key:
key.onUp(event)
self.notifySubscribers(Keyboard.UP, [key.getCode()[0]])
if key.isCommand():
self.__onCommandKeyUp(key)
else:
self.__onCharKeyUp(key.getCode())
self.__switchFeedbackKey(None)
del self.__curKeys[event.contact]
def __findKey(self, pos):
for key in self.__keys:
localPos = key.getRelPos(pos)
if self.__isInside(localPos, key):
return key
return None
def __isInside(self, pos, node):
return (pos.x >= 0 and pos.y >= 0 and
pos.x <= node.size.x and pos.y <= node.size.y)
def __switchFeedbackKey(self, newKey):
if self.__feedbackKey:
self.__feedbackKey.showFeedback(False)
self.__feedbackKey = newKey
if self.__feedbackKey:
self.__feedbackKey.showFeedback(True)
def __keyDown(self, key, event):
self.__switchFeedbackKey(key)
self.__curKeys[event.contact] = key
if key:
key.onDown(event)
if key.isCommand():
self.__onCommandKeyDown(key)
else:
self.__onCharKeyDown(key.getCode())
def __getCharKeyCode(self, keyCodes):
if self.__shiftDownCounter:
return keyCodes[1]
elif self.__altGrKeyCounter:
return keyCodes[2]
else:
return keyCodes[0]
def __onCharKeyDown(self, keyCodes):
self.notifySubscribers(Keyboard.DOWN, [keyCodes[0]])
def __onCharKeyUp(self, keyCodes):
self.notifySubscribers(Keyboard.CHAR, [self.__getCharKeyCode(keyCodes)])
def __onCommandKeyDown(self, key):
keyCode = key.getCode()[0]
if not(key.isStickyDown()):
if keyCode == self.__shiftKeyCode:
self.__shiftDownCounter += 1
if keyCode == self.__altGrKeyCode:
self.__altGrKeyCounter += 1
self.notifySubscribers(Keyboard.DOWN, [keyCode])
def __onCommandKeyUp(self, key):
keyCode = key.getCode()[0]
if not(key.isStickyDown()):
if keyCode == self.__shiftKeyCode:
if self.__shiftDownCounter > 0:
self.__shiftDownCounter -= 1
else:
avg.logger.warning('Keyboard: ShiftDownCounter=0 on [%s] up'
%self.__shiftKeyCode)
elif keyCode == self.__altGrKeyCode:
if self.__altGrKeyCounter > 0:
self.__altGrKeyCounter -= 1
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