git.maemo.org Git - gc-dialer/blob - dialcentral/util/qtpieboard.py

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