/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/legend.py
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revision 1102 by jonathan, Fri May 30 06:29:05 2003 UTC revision 1211 by jonathan, Mon Jun 16 12:27:52 2003 UTC
# Line 201  class LegendTree(wxTreeCtrl): Line 201  class LegendTree(wxTreeCtrl):
201          self.mainWindow = mainWindow          self.mainWindow = mainWindow
202          self.map = None          self.map = None
203          self.parent = parent          self.parent = parent
204          self.layer2id = {}          self.changing_selection = 0
205    
206          #          #
207          # The image list used by the wxTreeCtrl causes problems when          # The image list used by the wxTreeCtrl causes problems when
# Line 220  class LegendTree(wxTreeCtrl): Line 220  class LegendTree(wxTreeCtrl):
220    
221          self.previewer = ClassDataPreviewer()          self.previewer = ClassDataPreviewer()
222    
223            self.preventExpandCollapse = False
224    
225          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)
226          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)
227            EVT_TREE_ITEM_EXPANDING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
228            EVT_TREE_ITEM_COLLAPSING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
229    
230          EVT_CLOSE(self, self._OnClose)          EVT_CLOSE(self, self._OnClose)
231    
232          self.SetMap(map)          self.SetMap(map)
233    
234        def find_layer(self, layer):
235            """Return the tree item for the layer"""
236            root = self.GetRootItem()
237            id, cookie = self.GetFirstChild(root, 0)
238            while id.IsOk():
239                if self.GetPyData(id) is layer:
240                    return id
241                id, cookie = self.GetNextChild(root, cookie)
242            return None
243    
244      def _OnClose(self, event):      def _OnClose(self, event):
245          self.SetMap(None)          self.SetMap(None)
246    
# Line 340  class LegendTree(wxTreeCtrl): Line 354  class LegendTree(wxTreeCtrl):
354          self.SetMap(self.mainWindow.Map())          self.SetMap(self.mainWindow.Map())
355                    
356      def _OnSelChanged(self, event):      def _OnSelChanged(self, event):
357            # If we change the selection from normalize_selection do nothing.
358            if self.changing_selection:
359                return
360    
361            self.normalize_selection()
362          self.__UpdateSelection()          self.__UpdateSelection()
363    
364        def normalize_selection(self):
365            """Select the layer containing currently selected item"""
366            # This is really a workaround for a bug in wx where deleting a
367            # subtree with DeleteChildren does not update the selection
368            # properly and can lead to segfaults later because the return
369            # value of GetSelection points to invalid data.
370            item = self.GetSelection()
371            while item.IsOk():
372                object = self.GetPyData(item)
373                if isinstance(object, BaseLayer):
374                    break
375                item = self.GetItemParent(item)
376            else:
377                # No layer was found in the chain of parents, so there's
378                # nothing we can do.
379                return
380    
381            self.changing_selection = 1
382            try:
383                self.SelectItem(item)
384            finally:
385                self.changing_selection = 0
386    
387    
388        def OnItemExpandCollapse(self, event):
389            if self.preventExpandCollapse:
390                event.Veto()
391                self.preventExpandCollapse = False
392    
393      def _OnItemActivated(self, event):      def _OnItemActivated(self, event):
394            self.preventExpandCollapse = True
395          self.parent.DoOnProperties()          self.parent.DoOnProperties()
396    
397      def _OnMsgLayerChanged(self, layer):      def _OnMsgLayerChanged(self, layer):
398          assert isinstance(layer, BaseLayer)          assert isinstance(layer, BaseLayer)
399    
400          id = self.layer2id[layer]          id = self.find_layer(layer)
401          assert id.IsOk()          assert id is not None
402    
403          self.__FillTreeLayer(id)          self.__FillTreeLayer(id)
404          self.__UpdateSelection()          self.__UpdateSelection()
# Line 365  class LegendTree(wxTreeCtrl): Line 414  class LegendTree(wxTreeCtrl):
414      def _OnMsgMapLayersAdded(self, map):      def _OnMsgMapLayersAdded(self, map):
415          assert map is self.map          assert map is self.map
416    
417            # Build a dict with all layers known by the the tree as keys
418            layers = {}
419          root = self.GetRootItem()          root = self.GetRootItem()
420            id, cookie = self.GetFirstChild(root, 0)
421            while id.IsOk():
422                layers[self.GetPyData(id)] = 1
423                id, cookie = self.GetNextChild(root, cookie)
424    
425            # Add layers in the map but not in the dict
426          i = 0          i = 0
427          for l in map.Layers():          for l in map.Layers():
428              if not self.layer2id.has_key(l):              if not l in layers:
429                  self.__AddLayer(i, l)                  self.__AddLayer(i, l)
430    
431          self.__UpdateSelection()          self.__UpdateSelection()
# Line 377  class LegendTree(wxTreeCtrl): Line 433  class LegendTree(wxTreeCtrl):
433      def _OnMsgMapLayersRemoved(self, map):      def _OnMsgMapLayersRemoved(self, map):
434          assert map is self.map          assert map is self.map
435    
         layer, group = self.GetSelectedHierarchy()  
   
         if layer is None:  
             assert False, "Shouldn't be allowed."  
             return  
   
436          layers = map.Layers()          layers = map.Layers()
437    
438          for layer, id in self.layer2id.items():          root = self.GetRootItem()
439              if layer not in layers:          id, cookie = self.GetFirstChild(root, 0)
440                  if id.IsOk():          while id.IsOk():
441                      self.__RemoveLayer(id)              if self.GetPyData(id) not in layers:
442                    self.__RemoveLayer(id)
443                id, cookie = self.GetNextChild(root, cookie)
444    
445    
446          self.__UpdateSelection()          self.__UpdateSelection()
447    
# Line 400  class LegendTree(wxTreeCtrl): Line 453  class LegendTree(wxTreeCtrl):
453    
454      def _OnMsgLayerTitleChanged(self, layer):      def _OnMsgLayerTitleChanged(self, layer):
455    
456          id = self.layer2id[layer]          id = self.find_layer(layer)
457          if id.IsOk():          if id.IsOk():
458              self.SetItemText(id, layer.Title())              self.SetItemText(id, layer.Title())
459          self.__UpdateSelection()          self.__UpdateSelection()
# Line 492  class LegendTree(wxTreeCtrl): Line 545  class LegendTree(wxTreeCtrl):
545          self.SetPyData(id, l)          self.SetPyData(id, l)
546          self.__SetVisibilityStyle(l.Visible(), id)          self.__SetVisibilityStyle(l.Visible(), id)
547    
         self.layer2id[l] = id  
   
548          self.__FillTreeLayer(id)          self.__FillTreeLayer(id)
549          self.Expand(id)          self.Expand(id)
550    
# Line 513  class LegendTree(wxTreeCtrl): Line 564  class LegendTree(wxTreeCtrl):
564          layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)          layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
565    
566          self.Delete(id)          self.Delete(id)
         del self.layer2id[layer]  
567    
568      def DeleteChildren(self, pid):      def DeleteChildren(self, pid):
569          id, cookie = self.GetFirstChild(pid, 123)          id, cookie = self.GetFirstChild(pid, 123)
# Line 527  class LegendTree(wxTreeCtrl): Line 577  class LegendTree(wxTreeCtrl):
577    
578          if not root.IsOk():          if not root.IsOk():
579              self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)              self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)
580                                                                                    
581              bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)              bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
582              dc = wxMemoryDC()              dc = wxMemoryDC()
583              dc.SelectObject(bmp)              dc.SelectObject(bmp)
584              dc.SetBrush(wxBLACK_BRUSH)              dc.SetBrush(wxBLACK_BRUSH)
585              dc.Clear()              dc.Clear()
586              dc.SelectObject(wxNullBitmap)              dc.SelectObject(wxNullBitmap)
587                                                                                    
588              self.emptyImageIndex = \              self.emptyImageIndex = \
589                  self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))                  self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
590                                                                                    
591              bmp = resource.GetBitmapResource("legend_icon_layer",              bmp = resource.GetBitmapResource("legend_icon_layer",
592                                                wxBITMAP_TYPE_XPM)                                                wxBITMAP_TYPE_XPM)
593              self.mapImageIndex = \              self.mapImageIndex = \
594                  self.image_list.Add(bmp)                  self.image_list.Add(bmp)
595    
596              self.AssignImageList(self.image_list)              self.AssignImageList(self.image_list)
597                self.availImgListIndices = []
598    
599              root = self.AddRoot("")              root = self.AddRoot("")
600    
# Line 564  class LegendTree(wxTreeCtrl): Line 615  class LegendTree(wxTreeCtrl):
615          self.SetItemFont(id, font)          self.SetItemFont(id, font)
616                    
617      def __ShowHideLayer(self, layer):      def __ShowHideLayer(self, layer):
618          parent = self.layer2id[layer]          parent = self.find_layer(layer)
619          assert parent.IsOk()          assert parent.IsOk()
620    
621          visible = layer.Visible()          visible = layer.Visible()
# Line 618  class ScaleBarBitmap(wxBoxSizer): Line 669  class ScaleBarBitmap(wxBoxSizer):
669          dc.SelectObject(bmp)          dc.SelectObject(bmp)
670          dc.Clear()          dc.Clear()
671    
672          self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())          if self.canvas.map.projection is not None:
673                self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())
674    
675          self.scalebarBitmap.SetBitmap(bmp)          self.scalebarBitmap.SetBitmap(bmp)
676    
Legend:
Removed from v.1102  
changed lines
  Added in v.1211
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