git.maemo.org Git - watersofshiloah/blob - src/presenter.py

   1 import logging
   2
   3 import gobject
   4 import pango
   5 import cairo
   6 import gtk
   7
   8 import util.misc as misc_utils
   9
  10
  11 _moduleLogger = logging.getLogger(__name__)
  12
  13
  14 class NavigationBox(gobject.GObject):
  15
  16         __gsignals__ = {
  17                 'action' : (
  18                         gobject.SIGNAL_RUN_LAST,
  19                         gobject.TYPE_NONE,
  20                         (gobject.TYPE_STRING, ),
  21                 ),
  22                 'navigating' : (
  23                         gobject.SIGNAL_RUN_LAST,
  24                         gobject.TYPE_NONE,
  25                         (gobject.TYPE_STRING, ),
  26                 ),
  27         }
  28
  29         MINIMUM_MOVEMENT = 32
  30
  31         _NO_POSITION = -1, -1
  32
  33         def __init__(self):
  34                 gobject.GObject.__init__(self)
  35                 self._eventBox = gtk.EventBox()
  36                 self._eventBox.connect("button_press_event", self._on_button_press)
  37                 self._eventBox.connect("button_release_event", self._on_button_release)
  38                 self._eventBox.connect("motion_notify_event", self._on_motion_notify)
  39
  40                 self._isPortrait = True
  41                 self._clickPosition = self._NO_POSITION
  42
  43         @property
  44         def toplevel(self):
  45                 return self._eventBox
  46
  47         def set_orientation(self, orientation):
  48                 if orientation == gtk.ORIENTATION_VERTICAL:
  49                         self._isPortrait = True
  50                 elif orientation == gtk.ORIENTATION_HORIZONTAL:
  51                         self._isPortrait = False
  52                 else:
  53                         raise NotImplementedError(orientation)
  54
  55         def is_active(self):
  56                 return self._clickPosition != self._NO_POSITION
  57
  58         def get_state(self, newCoord):
  59                 if self._clickPosition == self._NO_POSITION:
  60                         return ""
  61
  62                 if self._isPortrait:
  63                         delta = (
  64                                 newCoord[0] - self._clickPosition[0],
  65                                 - (newCoord[1] - self._clickPosition[1])
  66                         )
  67                 else:
  68                         delta = (
  69                                 newCoord[1] - self._clickPosition[1],
  70                                 - (newCoord[0] - self._clickPosition[0])
  71                         )
  72                 absDelta = (abs(delta[0]), abs(delta[1]))
  73                 if max(*absDelta) < self.MINIMUM_MOVEMENT:
  74                         return "clicking"
  75
  76                 if absDelta[0] < absDelta[1]:
  77                         if 0 < delta[1]:
  78                                 return "up"
  79                         else:
  80                                 return "down"
  81                 else:
  82                         if 0 < delta[0]:
  83                                 return "right"
  84                         else:
  85                                 return "left"
  86
  87         @misc_utils.log_exception(_moduleLogger)
  88         def _on_button_press(self, widget, event):
  89                 if self._clickPosition != self._NO_POSITION:
  90                         _moduleLogger.debug("Ignoring double click")
  91                 self._clickPosition = event.get_coords()
  92
  93                 self.emit("navigating", "clicking")
  94
  95         @misc_utils.log_exception(_moduleLogger)
  96         def _on_button_release(self, widget, event):
  97                 assert self._clickPosition != self._NO_POSITION
  98                 try:
  99                         mousePosition = event.get_coords()
 100                         state = self.get_state(mousePosition)
 101                         assert state
 102                 finally:
 103                         self._clickPosition = self._NO_POSITION
 104                 self.emit("action", state)
 105
 106         @misc_utils.log_exception(_moduleLogger)
 107         def _on_motion_notify(self, widget, event):
 108                 if self._clickPosition == self._NO_POSITION:
 109                         return
 110
 111                 mousePosition = event.get_coords()
 112                 newState = self.get_state(mousePosition)
 113                 self.emit("navigating", newState)
 114
 115
 116 gobject.type_register(NavigationBox)
 117
 118
 119 class StreamPresenter(object):
 120
 121         def __init__(self, store):
 122                 self._store = store
 123
 124                 self._image = gtk.DrawingArea()
 125                 self._image.connect("expose_event", self._on_expose)
 126
 127                 self._isPortrait = True
 128
 129                 self._backgroundImage = None
 130                 self._title = ""
 131                 self._subtitle = ""
 132                 self._buttonImage = None
 133                 self._imageName = ""
 134                 self._dims = 0, 0
 135
 136         @property
 137         def toplevel(self):
 138                 return self._image
 139
 140         def set_orientation(self, orientation):
 141                 if orientation == gtk.ORIENTATION_VERTICAL:
 142                         self._isPortrait = True
 143                 elif orientation == gtk.ORIENTATION_HORIZONTAL:
 144                         self._isPortrait = False
 145                 else:
 146                         raise NotImplementedError(orientation)
 147
 148                 self._image.queue_draw()
 149
 150         def set_state(self, stateImage):
 151                 if stateImage == self._imageName:
 152                         return
 153                 self._imageName = stateImage
 154                 self._buttonImage = self._store.get_surface_from_store(stateImage)
 155
 156                 self._image.queue_draw()
 157
 158         def set_context(self, backgroundImage, title, subtitle):
 159                 self._backgroundImage = self._store.get_surface_from_store(backgroundImage)
 160                 self._title = title
 161                 self._subtitle = subtitle
 162
 163                 if self._isPortrait:
 164                         backWidth = self._backgroundImage.get_width()
 165                         backHeight = self._backgroundImage.get_height()
 166                 else:
 167                         backHeight = self._backgroundImage.get_width()
 168                         backWidth = self._backgroundImage.get_height()
 169                 self._image.set_size_request(backWidth, backHeight)
 170
 171                 self._image.queue_draw()
 172
 173         @misc_utils.log_exception(_moduleLogger)
 174         def _on_expose(self, widget, event):
 175                 cairoContext = self._image.window.cairo_create()
 176                 if not self._isPortrait:
 177                         cairoContext.transform(cairo.Matrix(0, 1, 1, 0, 0, 0))
 178                 self._draw_presenter(cairoContext)
 179
 180         def _draw_presenter(self, cairoContext):
 181                 rect = self._image.get_allocation()
 182                 self._dims = rect.width, rect.height
 183
 184                 # Blank things
 185                 cairoContext.rectangle(
 186                         0,
 187                         0,
 188                         rect.width,
 189                         rect.height,
 190                 )
 191                 cairoContext.set_source_rgb(0, 0, 0)
 192                 cairoContext.fill()
 193
 194                 # Draw Background
 195                 if self._backgroundImage is not None:
 196                         cairoContext.set_source_surface(
 197                                 self._backgroundImage,
 198                                 0,
 199                                 0,
 200                         )
 201                         cairoContext.paint()
 202
 203                 pangoContext = self._image.create_pango_context()
 204
 205                 titleLayout = pango.Layout(pangoContext)
 206                 titleLayout.set_markup(self._subtitle)
 207                 textWidth, textHeight = titleLayout.get_pixel_size()
 208                 subtitleTextX = self._dims[0] / 2 - textWidth / 2
 209                 subtitleTextY = self._dims[1] - textHeight - self._buttonImage.get_height() + 10
 210
 211                 subtitleLayout = pango.Layout(pangoContext)
 212                 subtitleLayout.set_markup(self._title)
 213                 textWidth, textHeight = subtitleLayout.get_pixel_size()
 214                 textX = self._dims[0] / 2 - textWidth / 2
 215                 textY = subtitleTextY - textHeight
 216
 217                 startContent = 30, textY - 5
 218                 endContent = self._dims[0] - 30,  self._dims[1] - 5
 219
 220                 # Control background
 221                 cairoContext.rectangle(
 222                         startContent[0],
 223                         startContent[1],
 224                         endContent[0] - startContent[0],
 225                         endContent[1] - startContent[1],
 226                 )
 227                 cairoContext.set_source_rgba(0.9, 0.9, 0.9, 0.75)
 228                 cairoContext.fill()
 229
 230                 # title
 231                 if self._title or self._subtitle:
 232                         cairoContext.move_to(subtitleTextX, subtitleTextY)
 233                         cairoContext.set_source_rgb(0, 0, 0)
 234                         cairoContext.show_layout(titleLayout)
 235
 236                         cairoContext.move_to(textX, textY)
 237                         cairoContext.set_source_rgb(0, 0, 0)
 238                         cairoContext.show_layout(subtitleLayout)
 239
 240                 self._draw_state(cairoContext)
 241
 242         def _draw_state(self, cairoContext):
 243                 if self._backgroundImage is None or self._buttonImage is None:
 244                         return
 245                 cairoContext.set_source_surface(
 246                         self._buttonImage,
 247                         self._dims[0] / 2 - self._buttonImage.get_width() / 2,
 248                         self._dims[1] - self._buttonImage.get_height() + 5,
 249                 )
 250                 cairoContext.paint()
 251
 252
 253 class StreamMiniPresenter(object):
 254
 255         def __init__(self, store):
 256                 self._store = store
 257
 258                 self._button = gtk.Image()
 259
 260         @property
 261         def toplevel(self):
 262                 return self._button
 263
 264         def set_orientation(self, orientation):
 265                 pass
 266
 267         def set_state(self, stateImage):
 268                 self._store.set_image_from_store(self._button, stateImage)
 269
 270         def set_context(self, backgroundImage, title, subtitle):
 271                 pass