lib/python/Screens/Wizard.py

   1 from Screen import Screen
   2
   3 import string
   4
   5 from Screens.HelpMenu import HelpableScreen
   6 from Components.Label import Label
   7 from Components.Slider import Slider
   8 from Components.ActionMap import HelpableActionMap, NumberActionMap
   9 from Components.Pixmap import *
  10 from Components.MenuList import MenuList
  11 from Components.ConfigList import ConfigList
  12
  13 from xml.sax import make_parser
  14 from xml.sax.handler import ContentHandler
  15
  16 class Wizard(Screen, HelpableScreen):
  17
  18         class parseWizard(ContentHandler):
  19                 def __init__(self, wizard):
  20                         self.isPointsElement, self.isReboundsElement = 0, 0
  21                         self.wizard = wizard
  22                         self.currContent = ""
  23                         self.lastStep = 0
  24
  25                 def startElement(self, name, attrs):
  26                         print "startElement", name
  27                         self.currContent = name
  28                         if (name == "step"):
  29                                 self.lastStep += 1
  30                                 if attrs.has_key('id'):
  31                                         id = str(attrs.get('id'))
  32                                 else:
  33                                         id = ""
  34                                 if attrs.has_key('nextstep'):
  35                                         nextstep = str(attrs.get('nextstep'))
  36                                 else:
  37                                         nextstep = None
  38                                 self.wizard[self.lastStep] = {"id": id, "condition": "", "text": "", "list": [], "config": {"screen": None, "args": None, "type": "" }, "code": "", "codeafter": "", "nextstep": nextstep}
  39                         elif (name == "text"):
  40                                 self.wizard[self.lastStep]["text"] = string.replace(str(attrs.get('value')), "\\n", "\n")
  41                         elif (name == "listentry"):
  42                                 self.wizard[self.lastStep]["list"].append((str(attrs.get('caption')), str(attrs.get('step'))))
  43                         elif (name == "config"):
  44                                 exec "from Screens." + str(attrs.get('module')) + " import *"
  45                                 self.wizard[self.lastStep]["config"]["screen"] = eval(str(attrs.get('screen')))
  46                                 if (attrs.has_key('args')):
  47                                         print "has args"
  48                                         self.wizard[self.lastStep]["config"]["args"] = str(attrs.get('args'))
  49                                 self.wizard[self.lastStep]["config"]["type"] = str(attrs.get('type'))
  50                         elif (name == "code"):
  51                                 if attrs.has_key('pos') and str(attrs.get('pos')) == "after":
  52                                         self.codeafter = True
  53                                 else:
  54                                         self.codeafter = False
  55                         elif (name == "condition"):
  56                                 pass
  57                 def endElement(self, name):
  58                         self.currContent = ""
  59                         if name == 'code':
  60                                 if self.codeafter:
  61                                         self.wizard[self.lastStep]["codeafter"] = self.wizard[self.lastStep]["codeafter"].strip()
  62                                 else:
  63                                         self.wizard[self.lastStep]["code"] = self.wizard[self.lastStep]["code"].strip()
  64                         elif name == 'condition':
  65                                 self.wizard[self.lastStep]["condition"] = self.wizard[self.lastStep]["condition"].strip()
  66
  67                 def characters(self, ch):
  68                         if self.currContent == "code":
  69                                 if self.codeafter:
  70                                         self.wizard[self.lastStep]["codeafter"] = self.wizard[self.lastStep]["codeafter"] + ch
  71                                 else:
  72                                         self.wizard[self.lastStep]["code"] = self.wizard[self.lastStep]["code"] + ch
  73                         elif self.currContent == "condition":
  74                                  self.wizard[self.lastStep]["condition"] = self.wizard[self.lastStep]["condition"] + ch
  75         def __init__(self, session, showSteps = True, showStepSlider = True, showList = True, showConfig = True):
  76                 Screen.__init__(self, session)
  77                 HelpableScreen.__init__(self)
  78
  79                 self.stepHistory = []
  80
  81                 self.wizard = {}
  82                 parser = make_parser()
  83                 print "Reading " + self.xmlfile
  84                 wizardHandler = self.parseWizard(self.wizard)
  85                 parser.setContentHandler(wizardHandler)
  86                 parser.parse('/usr/share/enigma2/' + self.xmlfile)
  87
  88                 self.showSteps = showSteps
  89                 self.showStepSlider = showStepSlider
  90                 self.showList = showList
  91                 self.showConfig = showConfig
  92
  93                 self.numSteps = len(self.wizard)
  94                 self.currStep = 1
  95
  96                 self["text"] = Label()
  97
  98                 if showConfig:
  99                         self["config"] = ConfigList([])
 100
 101                 if self.showSteps:
 102                         self["step"] = Label()
 103
 104                 if self.showStepSlider:
 105                         self["stepslider"] = Slider(1, self.numSteps)
 106
 107                 if self.showList:
 108                         self.list = []
 109                         self["list"] = MenuList(self.list)
 110
 111                 self.onShown.append(self.updateValues)
 112
 113                 self["actions"] = NumberActionMap(["WizardActions", "NumberActions"],
 114                 {
 115                         "ok": self.ok,
 116                         "back": self.back,
 117                         "left": self.left,
 118                         "right": self.right,
 119                         "up": self.up,
 120                         "down": self.down,
 121                         "1": self.keyNumberGlobal,
 122                         "2": self.keyNumberGlobal,
 123                         "3": self.keyNumberGlobal,
 124                         "4": self.keyNumberGlobal,
 125                         "5": self.keyNumberGlobal,
 126                         "6": self.keyNumberGlobal,
 127                         "7": self.keyNumberGlobal,
 128                         "8": self.keyNumberGlobal,
 129                         "9": self.keyNumberGlobal,
 130                         "0": self.keyNumberGlobal
 131                 }, -1)
 132
 133         def back(self):
 134                 if len(self.stepHistory) > 1:
 135                         self.currStep = self.stepHistory[-2]
 136                         self.stepHistory = self.stepHistory[:-2]
 137                 if self.currStep < 1:
 138                         self.currStep = 1
 139                 self.updateValues()
 140
 141         def markDone(self):
 142                 pass
 143
 144         def getStepWithID(self, id):
 145                 count = 0
 146                 for x in self.wizard:
 147                         if self.wizard[x]["id"] == id:
 148                                 return count
 149                         count += 1
 150                 return 0
 151
 152         def ok(self):
 153                 print "OK"
 154                 currStep = self.currStep
 155                 if self.showConfig:
 156                         if (self.wizard[currStep]["config"]["screen"] != None):
 157                                 try: # don't die, if no run() is available
 158                                         self.configInstance.run()
 159                                 except:
 160                                         print "Failed to run configInstance"
 161
 162                 if self.showList:
 163                         if (len(self.wizard[currStep]["list"]) > 0):
 164                                 nextStep = self.wizard[currStep]["list"][self["list"].l.getCurrentSelectionIndex()][1]
 165                                 self.currStep = self.getStepWithID(nextStep)
 166
 167                 if (currStep == self.numSteps): # wizard finished
 168                         self.markDone()
 169                         self.session.close()
 170                 else:
 171                         self.runCode(self.wizard[currStep]["codeafter"])
 172                         if self.wizard[currStep]["nextstep"] is not None:
 173                                 self.currStep = self.getStepWithID(self.wizard[currStep]["nextstep"])
 174                         self.currStep += 1
 175                         self.updateValues()
 176
 177                 print "Now: " + str(self.currStep)
 178
 179         def keyNumberGlobal(self, number):
 180                 if (self.wizard[self.currStep]["config"]["screen"] != None):
 181                         self.configInstance.keyNumberGlobal(number)
 182
 183         def left(self):
 184                 if (self.wizard[self.currStep]["config"]["screen"] != None):
 185                         self.configInstance.keyLeft()
 186                 print "left"
 187
 188         def right(self):
 189                 if (self.wizard[self.currStep]["config"]["screen"] != None):
 190                         self.configInstance.keyRight()
 191                 print "right"
 192
 193         def up(self):
 194                 if (self.showConfig and self.wizard[self.currStep]["config"]["screen"] != None):
 195                                 self["config"].instance.moveSelection(self["config"].instance.moveUp)
 196                 elif (self.showList and len(self.wizard[self.currStep]["list"]) > 0):
 197                         self["list"].instance.moveSelection(self["list"].instance.moveUp)
 198                 print "up"
 199
 200         def down(self):
 201                 if (self.showConfig and self.wizard[self.currStep]["config"]["screen"] != None):
 202                         self["config"].instance.moveSelection(self["config"].instance.moveDown)
 203                 elif (self.showList and len(self.wizard[self.currStep]["list"]) > 0):
 204                         self["list"].instance.moveSelection(self["list"].instance.moveDown)
 205                 print "down"
 206
 207         def runCode(self, code):
 208                 if code != "":
 209                         print "code", code
 210                         exec(code)
 211
 212         def updateValues(self):
 213                 print "Updating values in step " + str(self.currStep)
 214
 215                 self.stepHistory.append(self.currStep)
 216
 217                 self.condition = True
 218                 exec (self.wizard[self.currStep]["condition"])
 219                 if self.condition:
 220                         if self.showSteps:
 221                                 self["step"].setText(_("Step ") + str(self.currStep) + "/" + str(self.numSteps))
 222                         if self.showStepSlider:
 223                                 self["stepslider"].setValue(self.currStep)
 224
 225                         print "wizard text", _(self.wizard[self.currStep]["text"])
 226                         self["text"].setText(_(self.wizard[self.currStep]["text"]))
 227
 228                         self.runCode(self.wizard[self.currStep]["code"])
 229
 230                         if self.showList:
 231                                 self["list"].instance.setZPosition(1)
 232                                 self.list = []
 233                                 if (len(self.wizard[self.currStep]["list"]) > 0):
 234                                         self["list"].instance.setZPosition(2)
 235                                         for x in self.wizard[self.currStep]["list"]:
 236                                                 self.list.append((_(x[0]), None))
 237                                 self["list"].l.setList(self.list)
 238
 239                         if self.showConfig:
 240                                 self["config"].instance.setZPosition(1)
 241                                 if (self.wizard[self.currStep]["config"]["screen"] != None):
 242                                         if self.wizard[self.currStep]["config"]["type"] == "standalone":
 243                                                 print "Type is standalone"
 244                                                 self.session.openWithCallback(self.ok, self.wizard[self.currStep]["config"]["screen"])
 245                                         else:
 246                                                 self["config"].instance.setZPosition(2)
 247                                                 print "wizard screen", self.wizard[self.currStep]["config"]["screen"]
 248                                                 if self.wizard[self.currStep]["config"]["args"] == None:
 249                                                         self.configInstance = self.session.instantiateDialog(self.wizard[self.currStep]["config"]["screen"])
 250                                                 else:
 251                                                         self.configInstance = self.session.instantiateDialog(self.wizard[self.currStep]["config"]["screen"], eval(self.wizard[self.currStep]["config"]["args"]))
 252                                                 self["config"].l.setList(self.configInstance["config"].list)
 253                                                 self.configInstance["config"] = self["config"]
 254                                 else:
 255                                         self["config"].l.setList([])
 256                 else: # condition false
 257                                 self.currStep += 1
 258                                 self.updateValues()
 259
 260 class WizardManager:
 261         def __init__(self):
 262                 self.wizards = []
 263
 264         def registerWizard(self, wizard, precondition):
 265                 self.wizards.append((wizard, precondition))
 266
 267         def getWizards(self):
 268                 list = []
 269                 for x in self.wizards:
 270                         if x[1] == 1: # precondition
 271                                 list.append(x[0])
 272                 return list
 273
 274 wizardManager = WizardManager()