/[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 1241 by frank, Thu Jun 19 09:25:53 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            self.raiseProperties = False
225    
226          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)
227          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)
228            EVT_TREE_ITEM_EXPANDING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
229            EVT_TREE_ITEM_COLLAPSING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
230    
231          EVT_CLOSE(self, self._OnClose)          EVT_CLOSE(self, self._OnClose)
232    
233          self.SetMap(map)          self.SetMap(map)
234    
235        def find_layer(self, layer):
236            """Return the tree item for the layer"""
237            root = self.GetRootItem()
238            id, cookie = self.GetFirstChild(root, 0)
239            while id.IsOk():
240                if self.GetPyData(id) is layer:
241                    return id
242                id, cookie = self.GetNextChild(root, cookie)
243            return None
244    
245      def _OnClose(self, event):      def _OnClose(self, event):
246          self.SetMap(None)          self.SetMap(None)
247    
# Line 340  class LegendTree(wxTreeCtrl): Line 355  class LegendTree(wxTreeCtrl):
355          self.SetMap(self.mainWindow.Map())          self.SetMap(self.mainWindow.Map())
356                    
357      def _OnSelChanged(self, event):      def _OnSelChanged(self, event):
358            # If we change the selection from normalize_selection do nothing.
359            if self.changing_selection:
360                return
361    
362            self.normalize_selection()
363          self.__UpdateSelection()          self.__UpdateSelection()
364    
365        def normalize_selection(self):
366            """Select the layer containing currently selected item"""
367            # This is really a workaround for a bug in wx where deleting a
368            # subtree with DeleteChildren does not update the selection
369            # properly and can lead to segfaults later because the return
370            # value of GetSelection points to invalid data.
371            item = self.GetSelection()
372            while item.IsOk():
373                object = self.GetPyData(item)
374                if isinstance(object, BaseLayer):
375                    break
376                item = self.GetItemParent(item)
377            else:
378                # No layer was found in the chain of parents, so there's
379                # nothing we can do.
380                return
381    
382            self.changing_selection = 1
383            try:
384                self.SelectItem(item)
385            finally:
386                self.changing_selection = 0
387    
388    
389        def OnItemExpandCollapse(self, event):
390            if self.preventExpandCollapse:
391                event.Veto()
392                self.preventExpandCollapse = False
393    
394      def _OnItemActivated(self, event):      def _OnItemActivated(self, event):
395          self.parent.DoOnProperties()          # The following looks strange but is need under Windows to
396            # raise the Properties on double-click: The tree control
397            # always gets an Expanded / Collapsed event after the ItemActivated
398            # on double click, which raises the main window again. We add a second
399            # ItemActivated event to the queue, which simply raises the already
400            # displayed window.
401            if self.raiseProperties:
402                self.parent.DoOnProperties()
403                self.raiseProperties = False
404            else:
405                self.raiseProperties = True
406                self.preventExpandCollapse = True
407                self.parent.DoOnProperties()
408                self.AddPendingEvent(event)
409    
410      def _OnMsgLayerChanged(self, layer):      def _OnMsgLayerChanged(self, layer):
411          assert isinstance(layer, BaseLayer)          assert isinstance(layer, BaseLayer)
412    
413          id = self.layer2id[layer]          id = self.find_layer(layer)
414          assert id.IsOk()          assert id is not None
415    
416          self.__FillTreeLayer(id)          self.__FillTreeLayer(id)
417          self.__UpdateSelection()          self.__UpdateSelection()
# Line 365  class LegendTree(wxTreeCtrl): Line 427  class LegendTree(wxTreeCtrl):
427      def _OnMsgMapLayersAdded(self, map):      def _OnMsgMapLayersAdded(self, map):
428          assert map is self.map          assert map is self.map
429    
430            # Build a dict with all layers known by the the tree as keys
431            layers = {}
432          root = self.GetRootItem()          root = self.GetRootItem()
433            id, cookie = self.GetFirstChild(root, 0)
434            while id.IsOk():
435                layers[self.GetPyData(id)] = 1
436                id, cookie = self.GetNextChild(root, cookie)
437    
438            # Add layers in the map but not in the dict
439          i = 0          i = 0
440          for l in map.Layers():          for l in map.Layers():
441              if not self.layer2id.has_key(l):              if not l in layers:
442                  self.__AddLayer(i, l)                  self.__AddLayer(i, l)
443    
444          self.__UpdateSelection()          self.__UpdateSelection()
# Line 377  class LegendTree(wxTreeCtrl): Line 446  class LegendTree(wxTreeCtrl):
446      def _OnMsgMapLayersRemoved(self, map):      def _OnMsgMapLayersRemoved(self, map):
447          assert map is self.map          assert map is self.map
448    
         layer, group = self.GetSelectedHierarchy()  
   
         if layer is None:  
             assert False, "Shouldn't be allowed."  
             return  
   
449          layers = map.Layers()          layers = map.Layers()
450    
451          for layer, id in self.layer2id.items():          root = self.GetRootItem()
452              if layer not in layers:          id, cookie = self.GetFirstChild(root, 0)
453                  if id.IsOk():          while id.IsOk():
454                      self.__RemoveLayer(id)              if self.GetPyData(id) not in layers:
455                    self.__RemoveLayer(id)
456                id, cookie = self.GetNextChild(root, cookie)
457    
458    
459          self.__UpdateSelection()          self.__UpdateSelection()
460    
# Line 400  class LegendTree(wxTreeCtrl): Line 466  class LegendTree(wxTreeCtrl):
466    
467      def _OnMsgLayerTitleChanged(self, layer):      def _OnMsgLayerTitleChanged(self, layer):
468    
469          id = self.layer2id[layer]          id = self.find_layer(layer)
470          if id.IsOk():          if id.IsOk():
471              self.SetItemText(id, layer.Title())              self.SetItemText(id, layer.Title())
472          self.__UpdateSelection()          self.__UpdateSelection()
# Line 492  class LegendTree(wxTreeCtrl): Line 558  class LegendTree(wxTreeCtrl):
558          self.SetPyData(id, l)          self.SetPyData(id, l)
559          self.__SetVisibilityStyle(l.Visible(), id)          self.__SetVisibilityStyle(l.Visible(), id)
560    
         self.layer2id[l] = id  
   
561          self.__FillTreeLayer(id)          self.__FillTreeLayer(id)
562          self.Expand(id)          self.Expand(id)
563    
# Line 513  class LegendTree(wxTreeCtrl): Line 577  class LegendTree(wxTreeCtrl):
577          layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)          layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
578    
579          self.Delete(id)          self.Delete(id)
         del self.layer2id[layer]  
580    
581      def DeleteChildren(self, pid):      def DeleteChildren(self, pid):
582          id, cookie = self.GetFirstChild(pid, 123)          id, cookie = self.GetFirstChild(pid, 123)
# Line 527  class LegendTree(wxTreeCtrl): Line 590  class LegendTree(wxTreeCtrl):
590    
591          if not root.IsOk():          if not root.IsOk():
592              self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)              self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)
593                                                                                    
594              bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)              bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
595              dc = wxMemoryDC()              dc = wxMemoryDC()
596              dc.SelectObject(bmp)              dc.SelectObject(bmp)
597              dc.SetBrush(wxBLACK_BRUSH)              dc.SetBrush(wxBLACK_BRUSH)
598              dc.Clear()              dc.Clear()
599              dc.SelectObject(wxNullBitmap)              dc.SelectObject(wxNullBitmap)
600                                                                                    
601              self.emptyImageIndex = \              self.emptyImageIndex = \
602                  self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))                  self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
603                                                                                    
604              bmp = resource.GetBitmapResource("legend_icon_layer",              bmp = resource.GetBitmapResource("legend_icon_layer",
605                                                wxBITMAP_TYPE_XPM)                                                wxBITMAP_TYPE_XPM)
606              self.mapImageIndex = \              self.mapImageIndex = \
607                  self.image_list.Add(bmp)                  self.image_list.Add(bmp)
608    
609              self.AssignImageList(self.image_list)              self.AssignImageList(self.image_list)
610                self.availImgListIndices = []
611    
612              root = self.AddRoot("")              root = self.AddRoot("")
613    
# Line 564  class LegendTree(wxTreeCtrl): Line 628  class LegendTree(wxTreeCtrl):
628          self.SetItemFont(id, font)          self.SetItemFont(id, font)
629                    
630      def __ShowHideLayer(self, layer):      def __ShowHideLayer(self, layer):
631          parent = self.layer2id[layer]          parent = self.find_layer(layer)
632          assert parent.IsOk()          assert parent.IsOk()
633    
634          visible = layer.Visible()          visible = layer.Visible()
# Line 618  class ScaleBarBitmap(wxBoxSizer): Line 682  class ScaleBarBitmap(wxBoxSizer):
682          dc.SelectObject(bmp)          dc.SelectObject(bmp)
683          dc.Clear()          dc.Clear()
684    
685          self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())          if self.canvas.map is not None \
686                and self.canvas.map.projection is not None:
687                self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())
688    
689          self.scalebarBitmap.SetBitmap(bmp)          self.scalebarBitmap.SetBitmap(bmp)
690    
Legend:
Removed from v.1102  
changed lines
  Added in v.1241
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