git.maemo.org Git - ejpi/blob - src/libraries/qtpieboard.py

   1 #!/usr/bin/env python
   2
   3
   4 from __future__ import division
   5
   6 import os
   7 import warnings
   8
   9 from PyQt4 import QtGui
  10 from PyQt4 import QtCore
  11
  12 import qtpie
  13
  14
  15 class PieKeyboard(object):
  16
  17         SLICE_CENTER = -1
  18         SLICE_NORTH = 0
  19         SLICE_NORTH_WEST = 1
  20         SLICE_WEST = 2
  21         SLICE_SOUTH_WEST = 3
  22         SLICE_SOUTH = 4
  23         SLICE_SOUTH_EAST = 5
  24         SLICE_EAST = 6
  25         SLICE_NORTH_EAST = 7
  26
  27         MAX_ANGULAR_SLICES = 8
  28
  29         SLICE_DIRECTIONS = [
  30                 SLICE_CENTER,
  31                 SLICE_NORTH,
  32                 SLICE_NORTH_WEST,
  33                 SLICE_WEST,
  34                 SLICE_SOUTH_WEST,
  35                 SLICE_SOUTH,
  36                 SLICE_SOUTH_EAST,
  37                 SLICE_EAST,
  38                 SLICE_NORTH_EAST,
  39         ]
  40
  41         SLICE_DIRECTION_NAMES = [
  42                 "CENTER",
  43                 "NORTH",
  44                 "NORTH_WEST",
  45                 "WEST",
  46                 "SOUTH_WEST",
  47                 "SOUTH",
  48                 "SOUTH_EAST",
  49                 "EAST",
  50                 "NORTH_EAST",
  51         ]
  52
  53         def __init__(self, rows, columns):
  54                 self._layout = QtGui.QGridLayout()
  55
  56                 self.__cells = {}
  57
  58         @property
  59         def toplevel(self):
  60                 return self._layout
  61
  62         def add_pie(self, row, column, pieButton):
  63                 assert len(pieButton) == 8
  64                 self._layout.addWidget(pieButton, row, column)
  65                 self.__cells[(row, column)] = pieButton
  66
  67         def get_pie(self, row, column):
  68                 return self.__cells[(row, column)]
  69
  70
  71 class KeyboardModifier(object):
  72
  73         def __init__(self, name):
  74                 self.name = name
  75                 self.lock = False
  76                 self.once = False
  77
  78         @property
  79         def isActive(self):
  80                 return self.lock or self.once
  81
  82         def on_toggle_lock(self, *args, **kwds):
  83                 self.lock = not self.lock
  84
  85         def on_toggle_once(self, *args, **kwds):
  86                 self.once = not self.once
  87
  88         def reset_once(self):
  89                 self.once = False
  90
  91
  92 def parse_keyboard_data(text):
  93         return eval(text)
  94
  95
  96 def _enumerate_pie_slices(pieData, iconPaths):
  97         for direction, directionName in zip(
  98                 PieKeyboard.SLICE_DIRECTIONS, PieKeyboard.SLICE_DIRECTION_NAMES
  99         ):
 100                 if directionName in pieData:
 101                         sliceData = pieData[directionName]
 102
 103                         action = QtGui.QAction(None)
 104                         try:
 105                                 action.setText(sliceData["text"])
 106                         except KeyError:
 107                                 pass
 108                         try:
 109                                 relativeIconPath = sliceData["path"]
 110                         except KeyError:
 111                                 pass
 112                         else:
 113                                 for iconPath in iconPaths:
 114                                         absIconPath = os.path.join(iconPath, relativeIconPath)
 115                                         if os.path.exists(absIconPath):
 116                                                 action.setIcon(QtGui.QIcon(absIconPath))
 117                                                 break
 118                         pieItem = qtpie.QActionPieItem(action)
 119                         actionToken = sliceData["action"]
 120                 else:
 121                         pieItem = qtpie.PieFiling.NULL_CENTER
 122                         actionToken = ""
 123                 yield direction, pieItem, actionToken
 124
 125
 126 def load_keyboard(keyboardName, dataTree, keyboard, keyboardHandler, iconPaths):
 127         for (row, column), pieData in dataTree.iteritems():
 128                 pieItems = list(_enumerate_pie_slices(pieData, iconPaths))
 129                 assert pieItems[0][0] == PieKeyboard.SLICE_CENTER, pieItems[0]
 130                 _, center, centerAction = pieItems.pop(0)
 131
 132                 pieButton = qtpie.QPieButton(center)
 133                 pieButton.set_center(center)
 134                 keyboardHandler.map_slice_action(center, centerAction)
 135                 for direction, pieItem, action in pieItems:
 136                         pieButton.insertItem(pieItem)
 137                         keyboardHandler.map_slice_action(pieItem, action)
 138                 keyboard.add_pie(row, column, pieButton)
 139
 140
 141 class KeyboardHandler(object):
 142
 143         def __init__(self, keyhandler):
 144                 self.__keyhandler = keyhandler
 145                 self.__commandHandlers = {}
 146                 self.__modifiers = {}
 147                 self.__sliceActions = {}
 148
 149                 self.register_modifier("Shift")
 150                 self.register_modifier("Super")
 151                 self.register_modifier("Control")
 152                 self.register_modifier("Alt")
 153
 154         def register_command_handler(self, command, handler):
 155                 # @todo Look into hooking these up directly to the pie actions
 156                 self.__commandHandlers["[%s]" % command] = handler
 157
 158         def unregister_command_handler(self, command):
 159                 # @todo Look into hooking these up directly to the pie actions
 160                 del self.__commandHandlers["[%s]" % command]
 161
 162         def register_modifier(self, modifierName):
 163                 mod = KeyboardModifier(modifierName)
 164                 self.register_command_handler(modifierName, mod.on_toggle_lock)
 165                 self.__modifiers["<%s>" % modifierName] = mod
 166
 167         def unregister_modifier(self, modifierName):
 168                 self.unregister_command_handler(modifierName)
 169                 del self.__modifiers["<%s>" % modifierName]
 170
 171         def map_slice_action(self, slice, action):
 172                 callback = lambda direction: self(direction, action)
 173                 slice.action().triggered.connect(callback)
 174                 self.__sliceActions[slice] = (action, callback)
 175
 176         def __call__(self, direction, action):
 177                 activeModifiers = [
 178                         mod.name
 179                         for mod in self.__modifiers.itervalues()
 180                                 if mod.isActive
 181                 ]
 182
 183                 needResetOnce = False
 184                 if action.startswith("[") and action.endswith("]"):
 185                         commandName = action[1:-1]
 186                         if action in self.__commandHandlers:
 187                                 self.__commandHandlers[action](commandName, activeModifiers)
 188                                 needResetOnce = True
 189                         else:
 190                                 warnings.warn("Unknown command: [%s]" % commandName)
 191                 elif action.startswith("<") and action.endswith(">"):
 192                         modName = action[1:-1]
 193                         for mod in self.__modifiers.itervalues():
 194                                 if mod.name == modName:
 195                                         mod.on_toggle_once()
 196                                         break
 197                         else:
 198                                 warnings.warn("Unknown modifier: <%s>" % modName)
 199                 else:
 200                         self.__keyhandler(action, activeModifiers)
 201                         needResetOnce = True
 202
 203                 if needResetOnce:
 204                         for mod in self.__modifiers.itervalues():
 205                                 mod.reset_once()