conduit.hildonui.Canvas

1 """ 2 Manages adding, removing, resizing and drawing the canvas 3 4 The Canvas is the main area in Conduit, the area to which DataProviders are 5 dragged onto. 6 7 Copyright: John Stowers, 2006 8 Copyright: Thomas Van Machelen, 2007 9 License: GPLv2 10 """ 11 import gobject 12 import gtk 13 import logging 14 log = logging.getLogger("hildonui.Canvas") 15 16 import conduit.gtkui.Canvas 17 import conduit.gtkui.Util as GtkUtil 18 19 LINE_WIDTH = 3.0 20

21 -class Canvas(conduit.gtkui.Canvas.Canvas, gobject.GObject):

22 """ 23 This class manages many objects 24 """ 25 26 __gsignals__ = { 27 "position-changed" : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, []) # The canvas 28 } 29

30 - def __init__(self, parentWindow, typeConverter, syncManager):

31 """ 32 Draws an empty canvas of the appropriate size 33 """ 34 #setup the canvas 35 conduit.gtkui.Canvas.Canvas.__init__(self, 36 parentWindow,typeConverter,syncManager, 37 None,None, #menus are set in _setup_popup_menus 38 None #no message hints in hildon 39 ) 40 self.position = -1

41

42 - def _update_for_theme(self, *args):

43 pass

44

45 - def _setup_popup_menus(self, dataproviderPopupXML, conduitPopupXML):

46 # dp context menu 47 self.dataproviderMenu = DataProviderMenu(self) 48 # conduit context menu 49 self.conduitMenu = ConduitMenu(self)

50

51 - def _create_welcome(self):

52 c_x,c_y,c_w,c_h = self.get_bounds() 53 self.welcome = goocanvas.Text( 54 x=c_w/2, 55 y=c_w/3, 56 width=3*c_w/5, 57 text=self.WELCOME_MESSAGE, 58 anchor=gtk.ANCHOR_CENTER, 59 alignment=pango.ALIGN_CENTER, 60 font="Sans 10", 61 fill_color="black", 62 ) 63 self.root.add_child(self.welcome,-1)

64

65 - def _on_conduit_button_press(self, view, target, event):

66 log.debug("Clicked View: %s" % view.model) 67 68 #single left click 69 if event.type == gtk.gdk.BUTTON_PRESS and event.button == 1: 70 if not view.model.is_busy(): 71 self.conduitMenu.popup(None, None, 72 None, event.button, event.time) 73 74 #dont propogate the event 75 return True

76

77 - def _on_dataprovider_button_press(self, view, target, event):

78 """ 79 Handle button clicks 80 81 @param user_data_dataprovider_wrapper: The dpw that was clicked 82 @type user_data_dataprovider_wrapper: L{conduit.Module.ModuleWrapper} 83 """ 84 log.debug("Clicked View: %s" % view.model) 85 self.selectedDataproviderItem = view 86 87 #single left click 88 if event.type == gtk.gdk.BUTTON_PRESS and event.button == 1: 89 if view.model.enabled and not view.model.module.is_busy(): 90 self.dataproviderMenu.configureMenuItem.set_property("sensitive", view.model.configurable) 91 self.dataproviderMenu.popup(None, None, 92 None, event.button, event.time) 93 94 #dont propogate the event 95 return True

96

97 - def on_conduit_added(self, sender, conduitAdded):

98 """ 99 Creates a ConduitCanvasItem for the new conduit 100 """ 101 log.debug("Conduit added %s" % conduitAdded) 102 self.set_position(self.model.index(conduitAdded))

103

104 - def on_conduit_removed(self, sender, conduitRemoved):

105 self.move_previous ()

106

107 - def on_dataprovider_removed(self, sender, dataproviderRemoved, conduitCanvasItem):

108 for item in self._get_child_dataprovider_canvas_items(): 109 if item.model == dataproviderRemoved: 110 conduitCanvasItem.delete_dataprovider_canvas_item(item) 111 self._remove_overlap()

112

113 - def on_dataprovider_added(self, sender, dataproviderAdded, conduitCanvasItem):

114 #check for duplicates to eliminate race condition in set_sync_set 115 if dataproviderAdded in [i.model for i in self._get_child_dataprovider_canvas_items()]: 116 return 117 118 item = DataProviderCanvasItem( 119 parent=conduitCanvasItem, 120 model=dataproviderAdded 121 ) 122 item.connect('button-press-event', self._on_dataprovider_button_press) 123 conduitCanvasItem.add_dataprovider_canvas_item(item) 124 self._remove_overlap()

125

126 - def set_sync_set(self, syncSet):

127 conduit.gtkui.Canvas.Canvas.set_sync_set(self, syncSet) 128 if len(self.model.get_all_conduits()) > 0: 129 self.set_position(0)

130

131 - def move_next(self):

132 """ 133 Moves the canvas to the next conduit 134 """ 135 self.set_position(self.position + 1)

136

137 - def move_previous(self):

138 """ 139 Moves the canvas to the previous conduit 140 """ 141 self.set_position(self.position - 1)

142

143 - def set_position (self, index):

144 """ 145 Sets the Canvas position to the index provided 146 """ 147 nr_of_conduits = self.model.num_conduits() 148 149 if index > nr_of_conduits: 150 return 151 152 # get the old one 153 if self.position == index: 154 return 155 156 # set new index 157 self.position = index 158 159 log.debug("Current position %d, Lenght: %d" % (self.position, nr_of_conduits)) 160 161 # position cycling 162 if self.position == nr_of_conduits: 163 self.position = 0 164 elif self.position < 0: 165 self.position = nr_of_conduits - 1 166 167 self._refresh_current_item() 168 169 self.emit("position-changed")

170

171 - def get_position (self):

172 """ 173 Gets the position 174 """ 175 return self.position

176

177 - def get_position_str(self):

178 """ 179 Gets the position representation 180 """ 181 return "%s/%s" % (self.position + 1, self.model.num_conduits())

182

183 - def _refresh_current_item(self):

184 """ 185 Refreshes the current item; only in drawing, not the conduit 186 """ 187 self._remove_current_item() 188 189 try: 190 conduit = self.model.get_conduit(self.position) 191 self._create_item_for_conduit (conduit) 192 except: 193 self._show_welcome_message()

194

195 - def _remove_current_item (self):

196 """ 197 Clears the current conduit from the Canvas 198 """ 199 currentItem = self._get_child_conduit_canvas_item() 200 201 if not currentItem: 202 return 203 204 #remove the canvas item 205 idx = self.root.find_child(currentItem) 206 if idx != -1: 207 self.root.remove_child(idx) 208 else: 209 log.warn("Error finding item") 210 211 self._remove_overlap() 212 self._show_welcome_message()

213

214 - def _create_item_for_conduit (self, conduit):

215 c_x,c_y,c_w,c_h = self.get_bounds() 216 #Create the item and move it into position 217 bottom = self._get_bottom_of_conduits_coord() 218 conduitCanvasItem = ConduitCanvasItem( 219 parent=self.root, 220 model=conduit, 221 width=c_w) 222 conduitCanvasItem.translate( 223 LINE_WIDTH/2.0, 224 bottom+(LINE_WIDTH/2.0) 225 ) 226 227 # keep ref 228 self.selectedConduitItem = conduitCanvasItem 229 230 #FIXME Evilness to fix ConduitCanvasItems ending up too big (scrollbars suck!) 231 #self.set_size_request(self.CANVAS_WIDTH, self.CANVAS_HEIGHT) 232 #self.set_size_request(self.CANVAS_WIDTH, self.CANVAS_HEIGHT) 233 234 conduitCanvasItem.connect('button-press-event', self.

Source Code for Module conduit.hildonui.Canvas