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animation.py
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animation.py
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# Beedraw/Hive network capable client and server allowing collaboration on a single image
# Copyright (C) 2009 Thomas Becker
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from base64 import b64decode
import time
from StringIO import StringIO
from beeglobals import *
from beetypes import *
from beeutil import *
from sketchlog import SketchLogWriter
from beeapp import BeeApp
import Image
from ImageQt import ImageQt
import PyQt4.QtCore as qtcore
import PyQt4.QtGui as qtgui
import PyQt4.QtXml as qtxml
# for some reason the location changed between versions
try:
from PyQt4.QtXml import QXmlStreamReader
except:
from PyQt4.QtCore import QXmlStreamReader
class XmlToQueueEventsConverter:
""" Represents a parser to to turn an incomming xml stream into drawing events
"""
def __init__(self,device,window,stepdelay,type=ThreadTypes.animation,id=0):
self.xml=QXmlStreamReader()
#turn off namespace processing
self.xml.setNamespaceProcessing(False)
if device:
self.xml.setDevice(device)
self.id=id
self.window=window
self.type=type
self.stepdelay=stepdelay
self.keymap={}
self.imagestarted=False
self.imagedata=None
if type==ThreadTypes.animation:
self.layertype=LayerTypes.animation
else:
self.layertype=LayerTypes.network
def translateKey(self,key):
""" only needs to do something in animation threads
"""
return key
def addKeyTranslation(self,key,dockey):
""" only needs to do something in animation threads
"""
pass
def read(self):
""" Read tokens in the xml document until the end or until an error occurs, this function serves as a switchboard to call other functions based on the type of token
"""
while not self.xml.atEnd():
tokentype=self.xml.readNext()
if tokentype==QXmlStreamReader.StartElement:
self.processStartElement()
elif tokentype==QXmlStreamReader.EndElement:
self.processEndElement()
elif tokentype==QXmlStreamReader.Characters:
self.processCharacterData()
# if it's an error that might actually be a problem then print it out
if self.xml.hasError() and self.xml.error() != QXmlStreamReader.PrematureEndOfDocumentError:
print_debug("error while parsing XML: %s" % self.xml.errorString())
return self.xml.error()
def processStartElement(self):
""" Handle any type of starting XML tag and turn it into a drawing event if needed
"""
type=self.type
name=self.xml.name()
attrs=self.xml.attributes()
if name == 'createdoc':
(width,ok)=attrs.value('width').toString().toInt()
(height,ok)=attrs.value('height').toString().toInt()
self.window.addSetCanvasSizeRequestToQueue(width,height,type)
elif name == 'addlayer':
if self.type==ThreadTypes.server:
# create our own key data in this case
key=self.window.nextLayerKey()
else:
(key,ok)=attrs.value("key").toString().toInt()
(pos,ok)=attrs.value("position").toString().toInt()
# if this is the server don't trust the client to give the right ID, insthead pull it from the ID given to this thread
if self.type==ThreadTypes.server:
owner=self.id
# otherwise trust the ID in the message
else:
(owner,ok)=attrs.value("owner").toString().toInt()
if self.type!=ThreadTypes.animation:
dockey=key
# if it's an animation I need to map the key to a local one
else:
dockey=self.window.nextLayerKey()
self.addKeyTranslation(key,dockey)
self.window.addInsertLayerEventToQueue(pos,dockey,self.image,self.type,owner=owner)
elif name == 'sublayer':
(key,ok)=attrs.value("index").toString().toInt()
self.window.addRemoveLayerRequestToQueue(key,type)
elif name == 'movelayer':
(change,ok)=attrs.value("change").toString().toInt()
(index,ok)=attrs.value("index").toString().toInt()
if change==1:
self.window.addLayerUpToQueue(index,type)
else:
self.window.addLayerDownToQueue(index,type)
elif name == 'layeralpha':
(key,ok)=attrs.value("key").toString().toInt()
(opacity,ok)=attrs.value("alpha").toString().toFloat()
self.window.addOpacityChangeToQueue(key,opacity,type)
self.window.addOpacityDoneToQueue(key,type)
elif name == 'layermode':
time.sleep(self.stepdelay)
(key,ok)=attrs.value('key').toString().toInt()
mode=BlendTranslations.nameToMode(attrs.value('mode').toString())
self.window.addBlendModeChangeToQueue(self.translateKey(key),mode,type)
elif name == 'undo':
(owner,ok)=attrs.value('owner').toString().toInt()
self.window.addUndoToQueue(owner,type)
elif name == 'redo':
(owner,ok)=attrs.value('owner').toString().toInt()
self.window.addRedoToQueue(owner,type)
elif name == 'event':
self.clippath=None
self.image=None
elif name == 'toolevent':
self.image=None
self.strokestart=False
toolname="%s" % attrs.value('name').toString()
(layerkey,ok)=attrs.value('layerkey').toString().toInt()
(owner,ok)=attrs.value('owner').toString().toInt()
self.curlayer=self.translateKey(layerkey)
tool=self.window.master.getToolClassByName(toolname.strip())
#print error if we can't find the tool
if tool == None:
print_debug("Error, couldn't find tool with name: %s" % toolname)
return
self.curtool=tool.setupTool(self.window,self.curlayer)
self.curtool.clippath=self.clippath
self.curtool.layerkey=self.curlayer
self.curtool.owner=owner
elif name == 'fgcolor':
(r,ok)=attrs.value('r').toString().toInt()
(g,ok)=attrs.value('g').toString().toInt()
(b,ok)=attrs.value('b').toString().toInt()
self.curtool.fgcolor=qtgui.QColor(r,g,b)
elif name == 'bgcolor':
(r,ok)=attrs.value('r').toString().toInt()
(g,ok)=attrs.value('g').toString().toInt()
(b,ok)=attrs.value('b').toString().toInt()
self.curtool.bgcolor=qtgui.QColor(r,g,b)
elif name == 'clippath':
self.clippoints=[]
elif name == 'polypoint':
(x,ok)=attrs.value('x').toString().toInt()
(y,ok)=attrs.value('y').toString().toInt()
self.clippoints.append(qtcore.QPointF(x,y))
elif name == 'toolparam':
(value,ok)=attrs.value('value').toString().toInt()
self.curtool.setOption("%s" % attrs.value('name').toString(),value)
elif name == 'image':
self.imagestarted=True
elif name == 'rawevent':
self.raweventargs=[]
xstr=attrs.value('x').toString()
(self.x,ok)=xstr.toFloat()
(self.y,ok)=attrs.value('y').toString().toFloat()
(layerkey,ok)=attrs.value('layerkey').toString().toInt()
mode=qtgui.QPainter.CompositionMode_SourceOver
if attrs.value('compmode'):
modename=attrs.value('compmode')
mode=BlendTranslations.nameToMode(modename.toString())
if not mode:
mode=qtgui.QPainter.CompositionMode_SourceOver
self.layerkey=self.translateKey(layerkey)
if self.image:
self.window.addRawEventToQueue(self.layerkey,self.image,self.x,self.y,self.clippath,source=type,compmode=mode)
elif name == 'pointslist':
if self.strokestart==True:
self.window.addPenLeaveToQueue(self.curlayer,type)
self.window.addPenEnterToQueue(self.curlayer,type)
elif name == 'point':
time.sleep(self.stepdelay)
(x,ok)=attrs.value('x').toString().toFloat()
(y,ok)=attrs.value('y').toString().toFloat()
self.lastx=x
self.lasty=y
(pressure,ok)=attrs.value('pressure').toString().toFloat()
if self.strokestart == False:
self.window.addPenDownToQueue(x,y,pressure,self.curlayer,self.curtool,type)
self.strokestart=True
else:
self.window.addPenMotionToQueue(x,y,pressure,self.curlayer,type)
elif name == 'resyncrequest':
self.window.addResyncRequestToQueue(self.id)
elif name == 'resyncstart':
(width,ok)=attrs.value('width').toString().toInt()
(height,ok)=attrs.value('height').toString().toInt()
(remoteid,ok)=attrs.value('remoteid').toString().toInt()
self.window.addResyncStartToQueue(remoteid,width,height)
elif name == 'giveuplayer':
(layerkey,ok)=attrs.value('key').toString().toInt()
# make sure command is legit from this source
layer=self.window.getLayerForKey(layerkey)
# make sure layer is there
if layer:
proplock=qtcore.QReadLocker(layer.propertieslock)
if layer.owner!=self.id:
print_debug("ERROR: got bad give up layer command from client: %d for layer key: %d" % (self.id,layerkey))
else:
self.window.addGiveUpLayerToQueue(layerkey,self.id,type)
elif name == 'changelayerowner':
(layerkey,ok)=attrs.value('key').toString().toInt()
(owner,ok)=attrs.value('owner').toString().toInt()
self.window.addChangeLayerOwnerToQueue(layerkey,owner,type)
elif name == 'layerrequest':
(layerkey,ok)=attrs.value('key').toString().toInt()
self.window.addLayerRequestToQueue(layerkey,self.id,type)
elif name == 'fatalerror':
errormessage="%s" % attrs.value('errormessage').toString()
self.window.addFatalErrorNotificationToQueue(0,errormessage,type)
elif name == 'sketchlog':
print_debug("DEBUG: got document start tag")
elif name == 'networkhistorysize':
(newsize,ok)=attrs.value('newsize').toString().toInt()
self.window.setNetworkHistorySize(newsize)
elif name == 'null':
pass
else:
print_debug("WARNING: Don't know how to handle tag: %s" % name.toString())
def processEndElement(self):
name=self.xml.name()
if name == 'toolevent':
#print_debug("Adding end tool event to queue on layer %d" % self.curlayer)
self.window.addPenUpToQueue(self.lastx,self.lasty,self.curlayer,type)
self.curtool=None
elif name == 'clippath':
poly=qtgui.QPolygonF(self.clippoints)
self.clippath=qtgui.QPainterPath()
self.clippath.addPolygon(poly)
def processCharacterData(self):
if self.imagestarted:
#print_debug("processing image data")
self.imagestarted=False
rawstring=self.xml.text().toString()
data=qtcore.QByteArray()
data=data.append(rawstring)
data=qtcore.QByteArray.fromBase64(data)
data=qtcore.qUncompress(data)
self.image=qtgui.QImage.fromData(data,"PNG")
class AnimationEventsConverter(XmlToQueueEventsConverter):
def translateKey(self,key):
""" Translate key from local id to current window ID
"""
if key in self.keymap:
return self.keymap[key]
else:
print_debug("WARNING: couldn't find layer in keymap with key: %d" % key)
return None
def addKeyTranslation(self,key,dockey):
""" add in key translation, since this is an animation thread
"""
self.keymap[key]=dockey
# thread for playing local animations out of a file
class PlayBackAnimation (qtcore.QThread):
def __init__(self,window,filename,stepdelay=.05):
#def __init__(self,window,filename,stepdelay=0):
qtcore.QThread.__init__(self)
self.window=window
self.filename=filename
self.stepdelay=stepdelay
def run(self):
f=qtcore.QFile(self.filename)
f.open(qtcore.QIODevice.ReadOnly)
parser=AnimationEventsConverter(f,self.window,self.stepdelay)
parser.read()
f.close()
self.window.type=WindowTypes.singleuser
class NetworkListenerThread (qtcore.QThread):
def __init__(self,windowid,socket):
qtcore.QThread.__init__(self)
self.windowid=windowid
self.socket=socket
def run(self):
window=BeeApp().master.getWindowById(self.windowid)
# if we failed to get a socket then destroy the window and exit
if not self.socket:
print_debug("failed to get socket connection")
window.closeDrawingWindow()
# get ready for next contact from server
self.parser=XmlToQueueEventsConverter(None,window,0,type=ThreadTypes.network)
#qtcore.QObject.connect(self.socket, qtcore.SIGNAL("readyRead()"), self.readyRead)
#qtcore.QObject.connect(self.socket, qtcore.SIGNAL("disconnected()"), self.disconnected)
sendingthread=NetworkWriterThread(self.windowid,self.socket)
window.sendingthread=sendingthread
sendingthread.start()
# enter read loop, read till socket closes
while 1:
#print_debug("Ready to read from server")
data=self.socket.read(1024)
if not data:
window.setDisconnectMessage("Server has closed connection")
break
print_debug("got animation data from socket: %s" % data)
self.parser.xml.addData(data)
error=self.parser.read()
#error=QXmlStreamReader.NoError
# if there was an error and it wasn't a premature end of document error then we can't recover and need to disconnect
if error!=QXmlStreamReader.PrematureEndOfDocumentError and error!=QXmlStreamReader.NoError:
window.setDisconnectMessage("Error in XML stream")
window.addExitEventToQueue(source=ThreadTypes.network)
break
# this should be run when the socket is disconnected and the buffer is empty
window.disconnected()
self.parser=None
class NetworkWriterThread (qtcore.QThread):
""" class representing a client thread that is sending information to server
"""
def __init__(self,windowid,socket):
qtcore.QThread.__init__(self)
self.socket=socket
self.buffer=qtcore.QBuffer()
self.buffer.open(qtcore.QIODevice.ReadWrite)
self.gen=SketchLogWriter(self.buffer)
window=BeeApp().master.getWindowById(windowid)
self.queue=window.remoteoutputqueue
def run(self):
while 1:
# write out initial document start tag
datastr="%s" % qtcore.QString(self.buffer.data())
#print "wrote to buffer: %s" % datastr
self.socket.write(datastr)
self.buffer.buffer().resize(0)
self.buffer.seek(0)
#if self.socket.state()==qtnet.QAbstractSocket.UnconnectedState:
if not self.socket.isConnected():
break
#print_debug("attempting to get item from queue")
command=self.queue.get()
print_debug("Network Writer Thread got command from queue: %s" % str(command))
if command[0]==DrawingCommandTypes.quit:
return
self.gen.logCommand(command)