/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/legend.py
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revision 864 by frank, Thu May 8 12:29:23 2003 UTC revision 1241 by frank, Thu Jun 19 09:25:53 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]>
4    # Frank Koormann <[email protected]>
5  #  #
6  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
7  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 13  import resource Line 14  import resource
14    
15  from wxPython.wx import *  from wxPython.wx import *
16    
17  from Thuban.Model.layer import Layer  from Thuban.Model.layer import BaseLayer
18  from Thuban.Model.map import Map  from Thuban.Model.map import Map
 from Thuban.Model.messages import *  
19  from Thuban.Model.classification import ClassGroup  from Thuban.Model.classification import ClassGroup
20    
21  from Thuban.UI.messages import *  from Thuban.Model.messages import \
22        MAP_STACKING_CHANGED, MAP_LAYERS_ADDED, MAP_LAYERS_REMOVED, LAYER_CHANGED,\
23        LAYER_VISIBILITY_CHANGED, TITLE_CHANGED
24    
25    from Thuban.UI.messages import SCALE_CHANGED
26    
27  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
28  from Thuban.UI.dock import DockPanel  from Thuban.UI.dock import DockPanel
29  from Thuban.UI.scalebar import ScaleBar  from Thuban.UI.scalebar import ScaleBar
30    
31  from Thuban.Lib.connector import ConnectorError  from Thuban.Lib.connector import ConnectorError
32    
33  ID_LEGEND_RAISE = 4001  ID_LEGEND_TOP = 4001
34  ID_LEGEND_LOWER = 4002  ID_LEGEND_RAISE = 4002
35  ID_LEGEND_TREE = 4003  ID_LEGEND_LOWER = 4003
36  ID_LEGEND_PROPS = 4004  ID_LEGEND_BOTTOM = 4004
37  ID_LEGEND_SHOWLAYER = 4005  ID_LEGEND_TREE = 4005
38  ID_LEGEND_HIDELAYER = 4006  ID_LEGEND_PROPS = 4006
39    ID_LEGEND_SHOWLAYER = 4007
40    ID_LEGEND_HIDELAYER = 4008
41    
42  BMP_SIZE_W = 30  BMP_SIZE_W = 15
43  BMP_SIZE_H = 15  BMP_SIZE_H = 15
44    
45    TOP_BMP = "top_layer"
46  RAISE_BMP = "raise_layer"  RAISE_BMP = "raise_layer"
47  LOWER_BMP = "lower_layer"  LOWER_BMP = "lower_layer"
48    BOTTOM_BMP = "bottom_layer"
49  SHOW_BMP  = "show_layer"  SHOW_BMP  = "show_layer"
50  HIDE_BMP  = "hide_layer"  HIDE_BMP  = "hide_layer"
51  PROPS_BMP = "layer_properties"  PROPS_BMP = "layer_properties"
# Line 57  class LegendPanel(DockPanel): Line 66  class LegendPanel(DockPanel):
66          self.toolBar = wxToolBar(self, -1)          self.toolBar = wxToolBar(self, -1)
67          self.toolBar.SetToolBitmapSize(wxSize(24, 24))          self.toolBar.SetToolBitmapSize(wxSize(24, 24))
68    
69            bmp = resource.GetBitmapResource(TOP_BMP, wxBITMAP_TYPE_XPM)
70            self.toolBar.AddTool(ID_LEGEND_TOP, bmp,
71                shortHelpString=_("Top Layer"))
72    
73          bmp = resource.GetBitmapResource(RAISE_BMP, wxBITMAP_TYPE_XPM)          bmp = resource.GetBitmapResource(RAISE_BMP, wxBITMAP_TYPE_XPM)
74          self.toolBar.AddTool(ID_LEGEND_RAISE, bmp,          self.toolBar.AddTool(ID_LEGEND_RAISE, bmp,
75              shortHelpString=_("Raise Layer"))              shortHelpString=_("Raise Layer"))
# Line 65  class LegendPanel(DockPanel): Line 78  class LegendPanel(DockPanel):
78          self.toolBar.AddTool(ID_LEGEND_LOWER, bmp,          self.toolBar.AddTool(ID_LEGEND_LOWER, bmp,
79              shortHelpString=_("Lower Layer"))              shortHelpString=_("Lower Layer"))
80    
81            bmp = resource.GetBitmapResource(BOTTOM_BMP, wxBITMAP_TYPE_XPM)
82            self.toolBar.AddTool(ID_LEGEND_BOTTOM, bmp,
83                shortHelpString=_("Bottom Layer"))
84    
85          bmp = resource.GetBitmapResource(SHOW_BMP, wxBITMAP_TYPE_XPM)          bmp = resource.GetBitmapResource(SHOW_BMP, wxBITMAP_TYPE_XPM)
86          self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp,          self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp,
87              shortHelpString=_("Show Layer"))              shortHelpString=_("Show Layer"))
# Line 80  class LegendPanel(DockPanel): Line 97  class LegendPanel(DockPanel):
97          self.toolBar.Realize()          self.toolBar.Realize()
98          panelBox.Add(self.toolBar, 0, wxGROW, 0)          panelBox.Add(self.toolBar, 0, wxGROW, 0)
99    
100            EVT_TOOL(self, ID_LEGEND_TOP, self._OnMoveTop)
101          EVT_TOOL(self, ID_LEGEND_RAISE, self._OnMoveUp)          EVT_TOOL(self, ID_LEGEND_RAISE, self._OnMoveUp)
102          EVT_TOOL(self, ID_LEGEND_LOWER, self._OnMoveDown)          EVT_TOOL(self, ID_LEGEND_LOWER, self._OnMoveDown)
103            EVT_TOOL(self, ID_LEGEND_BOTTOM, self._OnMoveBottom)
104          EVT_TOOL(self, ID_LEGEND_PROPS, self._OnProperties)          EVT_TOOL(self, ID_LEGEND_PROPS, self._OnProperties)
105          EVT_TOOL(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)          EVT_TOOL(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)
106          EVT_TOOL(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)          EVT_TOOL(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)
# Line 116  class LegendPanel(DockPanel): Line 135  class LegendPanel(DockPanel):
135    
136      def DoOnSelChanged(self, layer, group):      def DoOnSelChanged(self, layer, group):
137    
138          ok = isinstance(layer, Layer)          ok = isinstance(layer, BaseLayer)
139          self.__EnableButtons(ok)          self.__EnableButtons(ok)
140    
141          self.mainWindow.SelectLayer(layer)          self.mainWindow.SelectLayer(layer)
# Line 124  class LegendPanel(DockPanel): Line 143  class LegendPanel(DockPanel):
143      def DoOnProperties(self):      def DoOnProperties(self):
144          list = self.tree.GetSelectedHierarchy()          list = self.tree.GetSelectedHierarchy()
145    
146          ok = isinstance(list[0], Layer)          ok = isinstance(list[0], BaseLayer)
147          if ok:          if ok:
148              self.mainWindow.OpenLayerProperties(list[0], list[1])              self.mainWindow.OpenLayerProperties(list[0], list[1])
149    
# Line 134  class LegendPanel(DockPanel): Line 153  class LegendPanel(DockPanel):
153      def _OnProperties(self, event):      def _OnProperties(self, event):
154          self.DoOnProperties()          self.DoOnProperties()
155    
156        def _OnMoveTop(self, event):
157            self.tree.MoveCurrentItemTop()
158            
159      def _OnMoveUp(self, event):      def _OnMoveUp(self, event):
160          self.tree.MoveCurrentItemUp()          self.tree.MoveCurrentItemUp()
161    
162      def _OnMoveDown(self, event):      def _OnMoveDown(self, event):
163          self.tree.MoveCurrentItemDown()          self.tree.MoveCurrentItemDown()
164    
165        def _OnMoveBottom(self, event):
166            self.tree.MoveCurrentItemBottom()
167    
168      def _OnShowLayer(self, event):      def _OnShowLayer(self, event):
169          self.tree.DoOnShowLayer()          self.tree.DoOnShowLayer()
170          pass          pass
# Line 155  class LegendPanel(DockPanel): Line 180  class LegendPanel(DockPanel):
180          pass          pass
181    
182      def __EnableButtons(self, on):      def __EnableButtons(self, on):
183            self.toolBar.EnableTool(ID_LEGEND_TOP, on)
184          self.toolBar.EnableTool(ID_LEGEND_RAISE, on)          self.toolBar.EnableTool(ID_LEGEND_RAISE, on)
185          self.toolBar.EnableTool(ID_LEGEND_LOWER, on)          self.toolBar.EnableTool(ID_LEGEND_LOWER, on)
186            self.toolBar.EnableTool(ID_LEGEND_BOTTOM, on)
187          self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER,  on)          self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER,  on)
188          self.toolBar.EnableTool(ID_LEGEND_HIDELAYER,  on)          self.toolBar.EnableTool(ID_LEGEND_HIDELAYER,  on)
189          self.toolBar.EnableTool(ID_LEGEND_PROPS, on)          self.toolBar.EnableTool(ID_LEGEND_PROPS, on)
# Line 174  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
208            # we remove layers and/or change a classification because it
209            # changes the image indices if you remove images from the list.
210            # Rather than removing unused images we use this list to keep
211            # track of which indices are available in the image list
212            # (because of a previous removal) and then  replace those indices
213            # with new images rather than appending to the end of the image
214            # list (assuming there are any that are available).
215            #
216            self.availImgListIndices = []
217    
218          self.image_list = None          self.image_list = None
219          self.emptyImageIndex = 0          self.emptyImageIndex = 0
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 197  class LegendTree(wxTreeCtrl): Line 251  class LegendTree(wxTreeCtrl):
251      def SetMap(self, map):      def SetMap(self, map):
252    
253          sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),          sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),
254                      (MAP_LAYERS_ADDED, self._OnMsgMapLayersAddedRemoved),                      (MAP_LAYERS_ADDED, self._OnMsgMapLayersAdded),
255                      (MAP_LAYERS_REMOVED, self._OnMsgMapLayersAddedRemoved)]                      (MAP_LAYERS_REMOVED, self._OnMsgMapLayersRemoved)]
256    
257          if self.map is not None:          if self.map is not None:
258              for msg, func in sub_list: self.map.Unsubscribe(msg, func)              for msg, func in sub_list: self.map.Unsubscribe(msg, func)
# Line 209  class LegendTree(wxTreeCtrl): Line 263  class LegendTree(wxTreeCtrl):
263                      #self._OnMsgMapsChanged)                      #self._OnMsgMapsChanged)
264              #except ConnectorError:              #except ConnectorError:
265                  #pass                  #pass
266              self.__DeleteAllItems()              self.DeleteAllItems()
267                    
268          self.map = map          self.map = map
269    
# Line 221  class LegendTree(wxTreeCtrl): Line 275  class LegendTree(wxTreeCtrl):
275                  #self._OnMsgMapsChanged)                  #self._OnMsgMapsChanged)
276              self.__FillTree(self.map)              self.__FillTree(self.map)
277    
278        def MoveCurrentItemTop(self):
279            layer, group = self.GetSelectedHierarchy()
280    
281            if layer is not None:
282                self.map.MoveLayerToTop(layer)
283            else:
284                assert False, "Shouldn't be allowed."
285                pass
286    
287      def MoveCurrentItemUp(self):      def MoveCurrentItemUp(self):
288          layer, group = self.GetSelectedHierarchy()          layer, group = self.GetSelectedHierarchy()
289    
# Line 239  class LegendTree(wxTreeCtrl): Line 302  class LegendTree(wxTreeCtrl):
302              assert False, "Shouldn't be allowed."              assert False, "Shouldn't be allowed."
303              pass              pass
304    
305        def MoveCurrentItemBottom(self):
306            layer, group = self.GetSelectedHierarchy()
307    
308            if layer is not None:
309                self.map.MoveLayerToBottom(layer)
310            else:
311                assert False, "Shouldn't be allowed."
312                pass
313    
314      def OnCompareItems(self, item1, item2):      def OnCompareItems(self, item1, item2):
315    
316          data1 = self.GetPyData(item1)          data1 = self.GetPyData(item1)
317          data2 = self.GetPyData(item2)          data2 = self.GetPyData(item2)
318    
319          if isinstance(data1, Layer):          if isinstance(data1, BaseLayer):
320              layers = self.map.Layers()              layers = self.map.Layers()
321              return layers.index(data2) - layers.index(data1)              return layers.index(data2) - layers.index(data1)
322          else:          else:
323              return wxTreeCtrl.OnCompareItems(self, item1, item2)              return wxTreeCtrl.OnCompareItems(self, item1, item2)
324    
   
325      def DoOnShowLayer(self):      def DoOnShowLayer(self):
         #self.__ShowHideLayer(True)  
326          layer, group = self.GetSelectedHierarchy()          layer, group = self.GetSelectedHierarchy()
327          layer.SetVisible(True)          layer.SetVisible(True)
328    
329      def DoOnHideLayer(self):      def DoOnHideLayer(self):
         #self.__ShowHideLayer(False)  
330          layer, group = self.GetSelectedHierarchy()          layer, group = self.GetSelectedHierarchy()
331          layer.SetVisible(False)          layer.SetVisible(False)
332    
# Line 286  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, Layer)          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          # XXX: yikes! this is so bad, we should be doing what is          self.__FillTreeLayer(id)
         #      commented out, but there is a problem with keeping  
         #      track of the images in the image list when we replace  
         #      a layer. it ends up causing a seg fault.  
         self.__FillTree(self.map)  
417          self.__UpdateSelection()          self.__UpdateSelection()
         #self.__FillTreeLayer(id)  
418    
419      def _OnMsgMapStackingChanged(self, *args):      def _OnMsgMapStackingChanged(self, *args):
420          self.Sort()          self.Sort()
# Line 313  class LegendTree(wxTreeCtrl): Line 424  class LegendTree(wxTreeCtrl):
424              self.EnsureVisible(id)              self.EnsureVisible(id)
425          self.__UpdateSelection()          self.__UpdateSelection()
426    
427      def _OnMsgMapLayersAddedRemoved(self, map):      def _OnMsgMapLayersAdded(self, map):
428          assert map is self.map          assert map is self.map
429    
430          self.__FillTree(self.map)          # Build a dict with all layers known by the the tree as keys
431            layers = {}
432            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
440            for l in map.Layers():
441                if not l in layers:
442                    self.__AddLayer(i, l)
443    
444            self.__UpdateSelection()
445    
446        def _OnMsgMapLayersRemoved(self, map):
447            assert map is self.map
448    
449            layers = map.Layers()
450    
451            root = self.GetRootItem()
452            id, cookie = self.GetFirstChild(root, 0)
453            while id.IsOk():
454                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    
461      def _OnMsgLayerVisibilityChanged(self, layer):      def _OnMsgLayerVisibilityChanged(self, layer):
462          assert isinstance(layer, Layer)          assert isinstance(layer, BaseLayer)
463    
464          self.__ShowHideLayer(layer)          self.__ShowHideLayer(layer)
465          self.__UpdateSelection()          self.__UpdateSelection()
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 340  class LegendTree(wxTreeCtrl): Line 479  class LegendTree(wxTreeCtrl):
479    
480          self.Freeze()          self.Freeze()
481    
482          self.__DeleteAllItems()          self.DeleteAllItems()
483    
484          if map.HasLayers():          if map.HasLayers():
485                root = self.GetRootItem()
             self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)  
                                                                                   
             bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)  
             dc = wxMemoryDC()  
             dc.SelectObject(bmp)  
             dc.SetBrush(wxBLACK_BRUSH)  
             dc.Clear()  
             dc.SelectObject(wxNullBitmap)  
                                                                                   
             self.emptyImageIndex = \  
                 self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))  
                                                                                   
             self.AssignImageList(self.image_list)  
   
             root = self.AddRoot("")  
   
486              for l in map.Layers():              for l in map.Layers():
487                  id = self.PrependItem(root, l.Title())                  self.__AddLayer(0, l)
                 l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)  
                 l.Subscribe(LAYER_VISIBILITY_CHANGED,  
                             self._OnMsgLayerVisibilityChanged)  
                 l.Subscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)  
                 self.SetPyData(id, l)  
                 self.__SetVisibilityStyle(l.Visible(), id)  
   
                 self.layer2id[l] = id  
   
                 self.__FillTreeLayer(id)  
                 self.Expand(id)  
488    
489          self.Thaw()          self.Thaw()
490    
# Line 383  class LegendTree(wxTreeCtrl): Line 495  class LegendTree(wxTreeCtrl):
495    
496          self.DeleteChildren(pid)          self.DeleteChildren(pid)
497    
498          clazz = layer.GetClassification()          if layer.HasClassification():
499    
500                clazz = layer.GetClassification()
501    
502                shapeType = layer.ShapeType()
503    
504          shapeType = layer.ShapeType()              show = layer.Visible()
505                for g in clazz:
506                    if g.IsVisible():
507                        id = self.AppendItem(pid, g.GetDisplayText())
508                        self.SetPyData(id, g)
509                        self.__SetVisibilityStyle(show, id)
510    
511                        bmp = self.__BuildGroupImage(g, shapeType)
512    
513                        if bmp is None:
514                            self.SetItemImage(id, -1)
515                            self.SetItemSelectedImage(id, -1)
516                        else:
517                            if self.availImgListIndices:
518                                i = self.availImgListIndices.pop(0)
519                                self.image_list.Replace(i, bmp)
520                            else:
521                                i = self.image_list.Add(bmp)
522    
523          show = layer.Visible()                          self.SetItemImage(id, i)
524          for g in clazz:                          self.SetItemSelectedImage(id, i)
             if g.IsVisible():  
                 id = self.AppendItem(pid, g.GetDisplayText())  
                 self.SetPyData(id, g)  
                 self.__SetVisibilityStyle(show, id)  
   
                 bmp = self.__BuildGroupImage(g, shapeType)  
   
                 if bmp is None:  
                     self.SetItemImage(id, self.emptyImageIndex)  
                 else:  
                     i = self.image_list.Add(bmp)  
                     self.SetItemImage(id, i)  
525    
526          self.Thaw()          self.Thaw()
527    
# Line 416  class LegendTree(wxTreeCtrl): Line 537  class LegendTree(wxTreeCtrl):
537    
538          return bmp          return bmp
539    
540      def __DeleteAllItems(self):      def DeleteAllItems(self):
541    
542          while len(self.layer2id) > 0:          pid = self.GetRootItem()
             layer, id = self.layer2id.popitem()  
             layer.Unsubscribe(LAYER_CHANGED,  
                               self._OnMsgLayerChanged)  
             layer.Unsubscribe(LAYER_VISIBILITY_CHANGED,  
                               self._OnMsgLayerVisibilityChanged)  
             layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)  
543    
544          self.DeleteAllItems()          id, cookie = self.GetFirstChild(pid, 123)
545            while id.IsOk():
546                self.__RemoveLayer(id)
547                id, cookie = self.GetNextChild(pid, cookie)
548    
549            wxTreeCtrl.DeleteAllItems(self)
550    
551        def __AddLayer(self, before, l):
552            root = self.GetRootItem()
553            id = self.InsertItemBefore(root, before,
554                                l.Title(),
555                                self.mapImageIndex,
556                                self.mapImageIndex)
557    
558            self.SetPyData(id, l)
559            self.__SetVisibilityStyle(l.Visible(), id)
560    
561            self.__FillTreeLayer(id)
562            self.Expand(id)
563    
564            l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)
565            l.Subscribe(LAYER_VISIBILITY_CHANGED,
566                        self._OnMsgLayerVisibilityChanged)
567            l.Subscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
568    
569        def __RemoveLayer(self, id):
570            self.DeleteChildren(id)
571    
572            layer = self.GetPyData(id)
573            layer.Unsubscribe(LAYER_CHANGED,
574                              self._OnMsgLayerChanged)
575            layer.Unsubscribe(LAYER_VISIBILITY_CHANGED,
576                              self._OnMsgLayerVisibilityChanged)
577            layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
578    
579            self.Delete(id)
580    
581        def DeleteChildren(self, pid):
582            id, cookie = self.GetFirstChild(pid, 123)
583            while id.IsOk():
584                self.availImgListIndices.append(self.GetItemImage(id))
585                id, cookie = self.GetNextChild(pid, cookie)
586            wxTreeCtrl.DeleteChildren(self, pid)
587    
588        def GetRootItem(self):
589            root = wxTreeCtrl.GetRootItem(self)
590    
591            if not root.IsOk():
592                self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)
593    
594                bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
595                dc = wxMemoryDC()
596                dc.SelectObject(bmp)
597                dc.SetBrush(wxBLACK_BRUSH)
598                dc.Clear()
599                dc.SelectObject(wxNullBitmap)
600    
601                self.emptyImageIndex = \
602                    self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
603    
604                bmp = resource.GetBitmapResource("legend_icon_layer",
605                                                  wxBITMAP_TYPE_XPM)
606                self.mapImageIndex = \
607                    self.image_list.Add(bmp)
608    
609                self.AssignImageList(self.image_list)
610                self.availImgListIndices = []
611    
612                root = self.AddRoot("")
613    
614            return root
615    
616      def __SetVisibilityStyle(self, visible, id):      def __SetVisibilityStyle(self, visible, id):
617          font = self.GetItemFont(id)          font = self.GetItemFont(id)
# Line 435  class LegendTree(wxTreeCtrl): Line 620  class LegendTree(wxTreeCtrl):
620              font.SetStyle(wxNORMAL)              font.SetStyle(wxNORMAL)
621              color = wxBLACK              color = wxBLACK
622          else:          else:
623              font.SetStyle(wxITALIC)              #font.SetStyle(wxITALIC)
624                font.SetStyle(wxNORMAL)
625              color = wxLIGHT_GREY              color = wxLIGHT_GREY
626    
627          self.SetItemTextColour(id, color)          self.SetItemTextColour(id, color)
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 461  class ScaleBarBitmap(wxBoxSizer): Line 647  class ScaleBarBitmap(wxBoxSizer):
647          # While the width is fixed, get the height _now_.          # While the width is fixed, get the height _now_.
648          dc = wxMemoryDC()          dc = wxMemoryDC()
649          textwidth, textheight = dc.GetTextExtent("%d"%0)          textwidth, textheight = dc.GetTextExtent("%d"%0)
650          self.width = 200          self.width = 210
651          self.height = textheight + 3*2 + 8          self.height = textheight + 3*2 + 8
652    
653          wxBoxSizer.__init__(self, wxVERTICAL)          wxBoxSizer.__init__(self, wxVERTICAL)
# Line 496  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)          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    
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