/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/legend.py
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revision 795 by jonathan, Wed Apr 30 17:01:06 2003 UTC revision 2588 by bh, Tue Mar 29 18:05:01 2005 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003, 2005 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.
8    
9  __version__ = "$Revision$"  __version__ = "$Revision$"
10    
11    from  math import fabs, cos, pi
12    
13  from Thuban import _  from Thuban import _
14    
15  import resource  import resource
16    
17  from wxPython.wx import *  from wxPython.wx import *
18    import wxPython
19    
20  from Thuban.Model.layer import Layer  from Thuban.Model.layer import BaseLayer
21  from Thuban.Model.map import Map  from Thuban.Model.map import Map
 from Thuban.Model.messages import *  
22  from Thuban.Model.classification import ClassGroup  from Thuban.Model.classification import ClassGroup
23    from Thuban.Model.proj import PROJ_UNITS_DEGREES
24    
25    from Thuban.Model.messages import \
26        MAP_STACKING_CHANGED, MAP_LAYERS_ADDED, MAP_LAYERS_REMOVED, LAYER_CHANGED,\
27        LAYER_VISIBILITY_CHANGED, TITLE_CHANGED
28    
29    from Thuban.UI.messages import SCALE_CHANGED
30    
 from Thuban.UI.messages import *  
31  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
32  from Thuban.UI.dock import DockPanel  from Thuban.UI.dock import DockPanel
33    from Thuban.UI.scalebar import ScaleBar
34    
35    from Thuban.UI.menu import Menu
36    
37  from Thuban.Lib.connector import ConnectorError  from Thuban.Lib.connector import ConnectorError
38    
39  ID_LEGEND_RAISE = 4001  ID_LEGEND_TOP = 4001
40  ID_LEGEND_LOWER = 4002  ID_LEGEND_RAISE = 4002
41  ID_LEGEND_TREE = 4003  ID_LEGEND_LOWER = 4003
42  ID_LEGEND_PROPS = 4004  ID_LEGEND_BOTTOM = 4004
43  ID_LEGEND_SHOWLAYER = 4005  ID_LEGEND_TREE = 4005
44  ID_LEGEND_HIDELAYER = 4006  ID_LEGEND_PROPS = 4006
45    ID_LEGEND_SHOWLAYER = 4007
46    ID_LEGEND_HIDELAYER = 4008
47    
48  BMP_SIZE_W = 30  BMP_SIZE_W = 16
49  BMP_SIZE_H = 15  BMP_SIZE_H = 16
50    
51    TOP_BMP = "top_layer"
52  RAISE_BMP = "raise_layer"  RAISE_BMP = "raise_layer"
53  LOWER_BMP = "lower_layer"  LOWER_BMP = "lower_layer"
54    BOTTOM_BMP = "bottom_layer"
55  SHOW_BMP  = "show_layer"  SHOW_BMP  = "show_layer"
56  HIDE_BMP  = "hide_layer"  HIDE_BMP  = "hide_layer"
57  PROPS_BMP = "layer_properties"  PROPS_BMP = "layer_properties"
58    
   
59  class LegendPanel(DockPanel):  class LegendPanel(DockPanel):
60    
61      def __init__(self, parent, map, mainWindow):      def __init__(self, parent, map, mainWindow):
# Line 56  class LegendPanel(DockPanel): Line 71  class LegendPanel(DockPanel):
71          self.toolBar = wxToolBar(self, -1)          self.toolBar = wxToolBar(self, -1)
72          self.toolBar.SetToolBitmapSize(wxSize(24, 24))          self.toolBar.SetToolBitmapSize(wxSize(24, 24))
73    
74            bmp = resource.GetBitmapResource(TOP_BMP, wxBITMAP_TYPE_XPM)
75            self.toolBar.AddTool(ID_LEGEND_TOP, bmp,
76                shortHelpString=_("Top Layer"))
77    
78          bmp = resource.GetBitmapResource(RAISE_BMP, wxBITMAP_TYPE_XPM)          bmp = resource.GetBitmapResource(RAISE_BMP, wxBITMAP_TYPE_XPM)
79          self.toolBar.AddTool(ID_LEGEND_RAISE, bmp,          self.toolBar.AddTool(ID_LEGEND_RAISE, bmp,
80              shortHelpString=_("Raise Layer"))              shortHelpString=_("Raise Layer"))
# Line 64  class LegendPanel(DockPanel): Line 83  class LegendPanel(DockPanel):
83          self.toolBar.AddTool(ID_LEGEND_LOWER, bmp,          self.toolBar.AddTool(ID_LEGEND_LOWER, bmp,
84              shortHelpString=_("Lower Layer"))              shortHelpString=_("Lower Layer"))
85    
86            bmp = resource.GetBitmapResource(BOTTOM_BMP, wxBITMAP_TYPE_XPM)
87            self.toolBar.AddTool(ID_LEGEND_BOTTOM, bmp,
88                shortHelpString=_("Bottom Layer"))
89    
90          bmp = resource.GetBitmapResource(SHOW_BMP, wxBITMAP_TYPE_XPM)          bmp = resource.GetBitmapResource(SHOW_BMP, wxBITMAP_TYPE_XPM)
91          self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp,          self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp,
92              shortHelpString=_("Show Layer"))              shortHelpString=_("Show Layer"))
# Line 79  class LegendPanel(DockPanel): Line 102  class LegendPanel(DockPanel):
102          self.toolBar.Realize()          self.toolBar.Realize()
103          panelBox.Add(self.toolBar, 0, wxGROW, 0)          panelBox.Add(self.toolBar, 0, wxGROW, 0)
104    
105            EVT_TOOL(self, ID_LEGEND_TOP, self._OnMoveTop)
106          EVT_TOOL(self, ID_LEGEND_RAISE, self._OnMoveUp)          EVT_TOOL(self, ID_LEGEND_RAISE, self._OnMoveUp)
107          EVT_TOOL(self, ID_LEGEND_LOWER, self._OnMoveDown)          EVT_TOOL(self, ID_LEGEND_LOWER, self._OnMoveDown)
108            EVT_TOOL(self, ID_LEGEND_BOTTOM, self._OnMoveBottom)
109          EVT_TOOL(self, ID_LEGEND_PROPS, self._OnProperties)          EVT_TOOL(self, ID_LEGEND_PROPS, self._OnProperties)
110          EVT_TOOL(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)          EVT_TOOL(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)
111          EVT_TOOL(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)          EVT_TOOL(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)
# Line 89  class LegendPanel(DockPanel): Line 114  class LegendPanel(DockPanel):
114    
115          panelBox.Add(self.tree, 1, wxGROW, 0)          panelBox.Add(self.tree, 1, wxGROW, 0)
116    
117            self.scalebarbitmap = ScaleBarBitmap(self, map, mainWindow)
118            panelBox.Add(self.scalebarbitmap, 0, wxGROW, 0)
119    
120          self.SetAutoLayout(True)          self.SetAutoLayout(True)
121          self.SetSizer(panelBox)          self.SetSizer(panelBox)
122          panelBox.SetSizeHints(self)          panelBox.SetSizeHints(self)
# Line 108  class LegendPanel(DockPanel): Line 136  class LegendPanel(DockPanel):
136    
137      def SetMap(self, map):      def SetMap(self, map):
138          self.tree.SetMap(map)          self.tree.SetMap(map)
139            self.scalebarbitmap.SetCanvas(self.mainWindow.canvas)
140    
141      def DoOnSelChanged(self, layer, group):      def DoOnSelChanged(self, layer, group):
142    
143          ok = isinstance(layer, Layer)          ok = isinstance(layer, BaseLayer)
144          self.__EnableButtons(ok)          self.__EnableButtons(ok)
145    
146          self.mainWindow.SelectLayer(layer)          self.mainWindow.SelectLayer(layer)
# Line 119  class LegendPanel(DockPanel): Line 148  class LegendPanel(DockPanel):
148      def DoOnProperties(self):      def DoOnProperties(self):
149          list = self.tree.GetSelectedHierarchy()          list = self.tree.GetSelectedHierarchy()
150    
151          ok = isinstance(list[0], Layer)          ok = isinstance(list[0], BaseLayer)
152          if ok:          if ok:
153              self.mainWindow.OpenLayerProperties(list[0], list[1])              self.mainWindow.OpenLayerProperties(list[0], list[1])
154    
# Line 129  class LegendPanel(DockPanel): Line 158  class LegendPanel(DockPanel):
158      def _OnProperties(self, event):      def _OnProperties(self, event):
159          self.DoOnProperties()          self.DoOnProperties()
160    
161        def _OnMoveTop(self, event):
162            self.tree.MoveCurrentItemTop()
163            
164      def _OnMoveUp(self, event):      def _OnMoveUp(self, event):
165          self.tree.MoveCurrentItemUp()          self.tree.MoveCurrentItemUp()
166    
167      def _OnMoveDown(self, event):      def _OnMoveDown(self, event):
168          self.tree.MoveCurrentItemDown()          self.tree.MoveCurrentItemDown()
169    
170        def _OnMoveBottom(self, event):
171            self.tree.MoveCurrentItemBottom()
172    
173      def _OnShowLayer(self, event):      def _OnShowLayer(self, event):
174          self.tree.DoOnShowLayer()          self.tree.DoOnShowLayer()
175          pass          pass
# Line 149  class LegendPanel(DockPanel): Line 184  class LegendPanel(DockPanel):
184          self.tree.DoOnHideLayer()          self.tree.DoOnHideLayer()
185          pass          pass
186    
187        def _OnToggleVisibility(self, event):
188            self.tree.ToggleVisibility()
189    
190        def _OnProjection(self, event):
191            self.tree.LayerProjection()
192    
193        def _OnRemoveLayer(self, event):
194            self.mainWindow.RemoveLayer()
195    
196        def _OnShowTable(self, event):
197            self.mainWindow.LayerShowTable()
198    
199      def __EnableButtons(self, on):      def __EnableButtons(self, on):
200            self.toolBar.EnableTool(ID_LEGEND_TOP, on)
201          self.toolBar.EnableTool(ID_LEGEND_RAISE, on)          self.toolBar.EnableTool(ID_LEGEND_RAISE, on)
202          self.toolBar.EnableTool(ID_LEGEND_LOWER, on)          self.toolBar.EnableTool(ID_LEGEND_LOWER, on)
203            self.toolBar.EnableTool(ID_LEGEND_BOTTOM, on)
204          self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER,  on)          self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER,  on)
205          self.toolBar.EnableTool(ID_LEGEND_HIDELAYER,  on)          self.toolBar.EnableTool(ID_LEGEND_HIDELAYER,  on)
206          self.toolBar.EnableTool(ID_LEGEND_PROPS, on)          self.toolBar.EnableTool(ID_LEGEND_PROPS, on)
# Line 169  class LegendTree(wxTreeCtrl): Line 218  class LegendTree(wxTreeCtrl):
218          self.mainWindow = mainWindow          self.mainWindow = mainWindow
219          self.map = None          self.map = None
220          self.parent = parent          self.parent = parent
221          self.layer2id = {}          self.changing_selection = 0
222    
223            #
224            # The image list used by the wxTreeCtrl causes problems when
225            # we remove layers and/or change a classification because it
226            # changes the image indices if you remove images from the list.
227            # Rather than removing unused images we use this list to keep
228            # track of which indices are available in the image list
229            # (because of a previous removal) and then  replace those indices
230            # with new images rather than appending to the end of the image
231            # list (assuming there are any that are available).
232            #
233            self.availImgListIndices = []
234    
235          self.image_list = None          self.image_list = None
236          self.emptyImageIndex = 0          self.emptyImageIndex = 0
237    
238          self.previewer = ClassDataPreviewer()          self.previewer = ClassDataPreviewer()
239    
240            self.preventExpandCollapse = False
241            self.raiseProperties = False
242    
243          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)
244          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)
245            EVT_TREE_ITEM_EXPANDING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
246            EVT_TREE_ITEM_COLLAPSING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
247            EVT_TREE_ITEM_RIGHT_CLICK(self, ID_LEGEND_TREE, self._OnRightClick)
248    
249          EVT_CLOSE(self, self._OnClose)          EVT_CLOSE(self, self._OnClose)
250    
251          self.SetMap(map)          self.SetMap(map)
252    
253        def _OnRightClick(self, event):
254            """Select item and pop up a context menu"""
255    
256            # The pop up menu is related to the legend tree, so we have direct
257            # access on the tree items. The events issued by the menu are handled
258            # by the legend panel, since most of the handlers are already
259            # implemented there.
260    
261            # Update item selection to the right click
262            item = event.GetItem()
263            self.SelectItem(item)
264    
265            # Define the menu
266            popup_menu = Menu("PopUp", "",
267                              [ "layer_visibility",
268                                None,
269                                "layer_properties",
270                                "layer_projection",
271                                "layer_remove",
272                                "layer_show_table",
273                                None,
274                                "layer_to_top",
275                                "layer_raise",
276                                "layer_lower",
277                                "layer_to_bottom"
278                                ])
279    
280            # Display the menu
281            pos = event.GetPoint()
282            shift = self.ClientToScreen((0,0))
283            self.PopupMenu(self.mainWindow.build_menu(popup_menu), pos)
284    
285        def find_layer(self, layer):
286            """Return the tree item for the layer"""
287            root = self.GetRootItem()
288            id, cookie = self.GetFirstChild(root)
289            while id.IsOk():
290                if self.GetPyData(id) is layer:
291                    return id
292                id, cookie = self.GetNextChild(root, cookie)
293            return None
294    
295      def _OnClose(self, event):      def _OnClose(self, event):
296          self.SetMap(None)          self.SetMap(None)
297    
# Line 192  class LegendTree(wxTreeCtrl): Line 301  class LegendTree(wxTreeCtrl):
301      def SetMap(self, map):      def SetMap(self, map):
302    
303          sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),          sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),
304                      (MAP_LAYERS_ADDED, self._OnMsgMapLayersAddedRemoved),                      (MAP_LAYERS_ADDED, self._OnMsgMapLayersAdded),
305                      (MAP_LAYERS_REMOVED, self._OnMsgMapLayersAddedRemoved)]                      (MAP_LAYERS_REMOVED, self._OnMsgMapLayersRemoved)]
306    
307          if self.map is not None:          if self.map is not None:
308              for msg, func in sub_list: self.map.Unsubscribe(msg, func)              for msg, func in sub_list: self.map.Unsubscribe(msg, func)
# Line 204  class LegendTree(wxTreeCtrl): Line 313  class LegendTree(wxTreeCtrl):
313                      #self._OnMsgMapsChanged)                      #self._OnMsgMapsChanged)
314              #except ConnectorError:              #except ConnectorError:
315                  #pass                  #pass
316              self.__DeleteAllItems()              self.DeleteAllItems()
317                    
318          self.map = map          self.map = map
319    
# Line 216  class LegendTree(wxTreeCtrl): Line 325  class LegendTree(wxTreeCtrl):
325                  #self._OnMsgMapsChanged)                  #self._OnMsgMapsChanged)
326              self.__FillTree(self.map)              self.__FillTree(self.map)
327    
328                    def MoveCurrentItemTop(self):
329            layer, group = self.GetSelectedHierarchy()
330    
331            if layer is not None:
332                self.map.MoveLayerToTop(layer)
333            else:
334                assert False, "Shouldn't be allowed."
335                pass
336    
337      def MoveCurrentItemUp(self):      def MoveCurrentItemUp(self):
338          layer, group = self.GetSelectedHierarchy()          layer, group = self.GetSelectedHierarchy()
339    
# Line 235  class LegendTree(wxTreeCtrl): Line 352  class LegendTree(wxTreeCtrl):
352              assert False, "Shouldn't be allowed."              assert False, "Shouldn't be allowed."
353              pass              pass
354    
355        def MoveCurrentItemBottom(self):
356            layer, group = self.GetSelectedHierarchy()
357    
358            if layer is not None:
359                self.map.MoveLayerToBottom(layer)
360            else:
361                assert False, "Shouldn't be allowed."
362                pass
363    
364      def OnCompareItems(self, item1, item2):      def OnCompareItems(self, item1, item2):
365    
366          data1 = self.GetPyData(item1)          data1 = self.GetPyData(item1)
367          data2 = self.GetPyData(item2)          data2 = self.GetPyData(item2)
368    
369          if isinstance(data1, Layer):          if isinstance(data1, BaseLayer):
370              layers = self.map.Layers()              layers = self.map.Layers()
371              return layers.index(data2) - layers.index(data1)              return layers.index(data2) - layers.index(data1)
372          else:          else:
373              return wxTreeCtrl.OnCompareItems(self, item1, item2)              return wxTreeCtrl.OnCompareItems(self, item1, item2)
374    
   
375      def DoOnShowLayer(self):      def DoOnShowLayer(self):
         #self.__ShowHideLayer(True)  
376          layer, group = self.GetSelectedHierarchy()          layer, group = self.GetSelectedHierarchy()
377          layer.SetVisible(True)          layer.SetVisible(True)
378    
379      def DoOnHideLayer(self):      def DoOnHideLayer(self):
         #self.__ShowHideLayer(False)  
380          layer, group = self.GetSelectedHierarchy()          layer, group = self.GetSelectedHierarchy()
381          layer.SetVisible(False)          layer.SetVisible(False)
382    
383        def ToggleVisibility(self):
384            layer, group = self.GetSelectedHierarchy()
385    
386            layer.SetVisible(not layer.Visible())
387    
388        def LayerProjection(self):
389            self.parent.mainWindow.LayerProjection()
390    
391      def Sort(self):      def Sort(self):
392          self.SortChildren(self.GetRootItem())          self.SortChildren(self.GetRootItem())
393    
# Line 282  class LegendTree(wxTreeCtrl): Line 413  class LegendTree(wxTreeCtrl):
413          self.SetMap(self.mainWindow.Map())          self.SetMap(self.mainWindow.Map())
414                    
415      def _OnSelChanged(self, event):      def _OnSelChanged(self, event):
416            # If we change the selection from normalize_selection do nothing.
417            if self.changing_selection:
418                return
419    
420            self.normalize_selection()
421          self.__UpdateSelection()          self.__UpdateSelection()
422    
423        def normalize_selection(self):
424            """Select the layer containing currently selected item"""
425            # This is really a workaround for a bug in wx where deleting a
426            # subtree with DeleteChildren does not update the selection
427            # properly and can lead to segfaults later because the return
428            # value of GetSelection points to invalid data.
429            item = self.GetSelection()
430            while item.IsOk():
431                object = self.GetPyData(item)
432                if isinstance(object, BaseLayer):
433                    break
434                item = self.GetItemParent(item)
435            else:
436                # No layer was found in the chain of parents, so there's
437                # nothing we can do.
438                return
439    
440            self.changing_selection = 1
441            try:
442                self.SelectItem(item)
443            finally:
444                self.changing_selection = 0
445    
446    
447        def OnItemExpandCollapse(self, event):
448            if self.preventExpandCollapse:
449                event.Veto()
450                self.preventExpandCollapse = False
451    
452      def _OnItemActivated(self, event):      def _OnItemActivated(self, event):
453          self.parent.DoOnProperties()          # The following looks strange but is need under Windows to
454            # raise the Properties on double-click: The tree control
455            # always gets an Expanded / Collapsed event after the ItemActivated
456            # on double click, which raises the main window again. We add a second
457            # ItemActivated event to the queue, which simply raises the already
458            # displayed window.
459            if self.raiseProperties:
460                self.parent.DoOnProperties()
461                self.raiseProperties = False
462            else:
463                self.raiseProperties = True
464                self.preventExpandCollapse = True
465                self.parent.DoOnProperties()
466                self.AddPendingEvent(event)
467    
468      def _OnMsgLayerChanged(self, layer):      def _OnMsgLayerChanged(self, layer):
469          assert isinstance(layer, Layer)          assert isinstance(layer, BaseLayer)
470    
471          id = self.layer2id[layer]          id = self.find_layer(layer)
472          assert id.IsOk()          assert id is not None
473    
474          # 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)  
475          self.__UpdateSelection()          self.__UpdateSelection()
         #self.__FillTreeLayer(id)  
476    
477      def _OnMsgMapStackingChanged(self, *args):      def _OnMsgMapStackingChanged(self, *args):
478          self.Sort()          self.Sort()
# Line 309  class LegendTree(wxTreeCtrl): Line 482  class LegendTree(wxTreeCtrl):
482              self.EnsureVisible(id)              self.EnsureVisible(id)
483          self.__UpdateSelection()          self.__UpdateSelection()
484    
485      def _OnMsgMapLayersAddedRemoved(self, map):      def _OnMsgMapLayersAdded(self, map):
486          assert map is self.map          assert map is self.map
487    
488          self.__FillTree(self.map)          # Build a dict with all layers known by the the tree as keys
489            layers = {}
490            root = self.GetRootItem()
491            id, cookie = self.GetFirstChild(root)
492            while id.IsOk():
493                layers[self.GetPyData(id)] = 1
494                id, cookie = self.GetNextChild(root, cookie)
495    
496            # Add layers in the map but not in the dict
497            i = 0
498            for l in map.Layers():
499                if not l in layers:
500                    self.__AddLayer(i, l)
501    
502            self.__UpdateSelection()
503    
504        def _OnMsgMapLayersRemoved(self, map):
505            assert map is self.map
506    
507            layers = map.Layers()
508    
509            root = self.GetRootItem()
510            id, cookie = self.GetFirstChild(root)
511            while id.IsOk():
512                if self.GetPyData(id) not in layers:
513                    self.__RemoveLayer(id)
514                id, cookie = self.GetNextChild(root, cookie)
515    
516    
517          self.__UpdateSelection()          self.__UpdateSelection()
518    
519      def _OnMsgLayerVisibilityChanged(self, layer):      def _OnMsgLayerVisibilityChanged(self, layer):
520          assert isinstance(layer, Layer)          assert isinstance(layer, BaseLayer)
521    
522          self.__ShowHideLayer(layer)          self.__ShowHideLayer(layer)
523          self.__UpdateSelection()          self.__UpdateSelection()
524    
525      def _OnMsgLayerTitleChanged(self, layer):      def _OnMsgLayerTitleChanged(self, layer):
526    
527          id = self.layer2id[layer]          id = self.find_layer(layer)
528          if id.IsOk():          if id.IsOk():
529              self.SetItemText(id, layer.Title())              self.SetItemText(id, layer.Title())
530          self.__UpdateSelection()          self.__UpdateSelection()
# Line 336  class LegendTree(wxTreeCtrl): Line 537  class LegendTree(wxTreeCtrl):
537    
538          self.Freeze()          self.Freeze()
539    
540          self.__DeleteAllItems()          self.DeleteAllItems()
541    
542          if map.HasLayers():          if map.HasLayers():
543                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("")  
   
544              for l in map.Layers():              for l in map.Layers():
545                  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)  
546    
547          self.Thaw()          self.Thaw()
548    
549      def __FillTreeLayer(self, pid):      def __FillTreeLayer(self, pid):
550    
551          layer = self.GetPyData(pid)          layer = self.GetPyData(pid)
552    
553          self.Freeze()          self.Freeze()
554    
555          self.DeleteChildren(pid)          self.DeleteChildren(pid)
556    
557          clazz = layer.GetClassification()          if layer.HasClassification():
558    
559          shapeType = layer.ShapeType()              clazz = layer.GetClassification()
560    
561          show = layer.Visible()              shapeType = layer.ShapeType()
562          for g in clazz:  
563              if g.IsVisible():              show = layer.Visible()
564                  id = self.AppendItem(pid, g.GetDisplayText())              for g in clazz:
565                  self.SetPyData(id, g)                  if g.IsVisible():
566                  self.__SetVisibilityStyle(show, id)                      id = self.AppendItem(pid, g.GetDisplayText())
567                        self.SetPyData(id, g)
568                  bmp = self.__BuildGroupImage(g, shapeType)                      self.__SetVisibilityStyle(show, id)
569    
570                  if bmp is None:                      bmp = self.__BuildGroupImage(g, shapeType)
571                      self.SetItemImage(id, self.emptyImageIndex)  
572                  else:                      if bmp is None:
573                      i = self.image_list.Add(bmp)                          self.SetItemImage(id, -1, wxTreeItemIcon_Normal)
574                      self.SetItemImage(id, i)                          self.SetItemImage(id, -1, wxTreeItemIcon_Selected)
575                            #self.SetItemSelectedImage(id, -1)
576                        else:
577                            if self.availImgListIndices:
578                                i = self.availImgListIndices.pop(0)
579                                self.image_list.Replace(i, bmp)
580                            else:
581                                i = self.image_list.Add(bmp)
582    
583                            self.SetItemImage(id, i, wxTreeItemIcon_Normal)
584                            self.SetItemImage(id, i, wxTreeItemIcon_Selected)
585                            #self.SetItemlectedImage(id, i)
586    
587          self.Thaw()          self.Thaw()
588    
# Line 412  class LegendTree(wxTreeCtrl): Line 598  class LegendTree(wxTreeCtrl):
598    
599          return bmp          return bmp
600    
601      def __DeleteAllItems(self):      def DeleteAllItems(self):
602    
603          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)  
604    
605          self.DeleteAllItems()          id, cookie = self.GetFirstChild(pid)
606            while id.IsOk():
607                self.__RemoveLayer(id)
608                id, cookie = self.GetNextChild(pid, cookie)
609    
610            wxTreeCtrl.DeleteAllItems(self)
611    
612        def __AddLayer(self, before, l):
613            root = self.GetRootItem()
614            id = self.InsertItemBefore(root, before,
615                                l.Title(),
616                                self.mapImageIndex,
617                                self.mapImageIndex)
618    
619            self.SetPyData(id, l)
620            self.__SetVisibilityStyle(l.Visible(), id)
621    
622            self.__FillTreeLayer(id)
623            self.Expand(id)
624    
625            l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)
626            l.Subscribe(LAYER_VISIBILITY_CHANGED,
627                        self._OnMsgLayerVisibilityChanged)
628            l.Subscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
629    
630        def __RemoveLayer(self, id):
631            self.DeleteChildren(id)
632    
633            layer = self.GetPyData(id)
634            layer.Unsubscribe(LAYER_CHANGED,
635                              self._OnMsgLayerChanged)
636            layer.Unsubscribe(LAYER_VISIBILITY_CHANGED,
637                              self._OnMsgLayerVisibilityChanged)
638            layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
639    
640            self.Delete(id)
641    
642        def DeleteChildren(self, pid):
643            id, cookie = self.GetFirstChild(pid)
644            while id.IsOk():
645                self.availImgListIndices.append(self.GetItemImage(id))
646                id, cookie = self.GetNextChild(pid, cookie)
647            wxTreeCtrl.DeleteChildren(self, pid)
648    
649        def GetRootItem(self):
650            root = wxTreeCtrl.GetRootItem(self)
651    
652            if not root.IsOk():
653                self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)
654    
655                bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
656                dc = wxMemoryDC()
657                dc.SelectObject(bmp)
658                dc.SetBrush(wxBLACK_BRUSH)
659                dc.Clear()
660                dc.SelectObject(wxNullBitmap)
661    
662                self.emptyImageIndex = \
663                    self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
664    
665                bmp = resource.GetBitmapResource("legend_icon_layer",
666                                                  wxBITMAP_TYPE_XPM)
667                self.mapImageIndex = \
668                    self.image_list.Add(bmp)
669    
670                self.AssignImageList(self.image_list)
671                self.availImgListIndices = []
672    
673                root = self.AddRoot("")
674    
675            return root
676    
677      def __SetVisibilityStyle(self, visible, id):      def __SetVisibilityStyle(self, visible, id):
678          font = self.GetItemFont(id)          font = self.GetItemFont(id)
# Line 431  class LegendTree(wxTreeCtrl): Line 681  class LegendTree(wxTreeCtrl):
681              font.SetStyle(wxNORMAL)              font.SetStyle(wxNORMAL)
682              color = wxBLACK              color = wxBLACK
683          else:          else:
684              font.SetStyle(wxITALIC)              #font.SetStyle(wxITALIC)
685                font.SetStyle(wxNORMAL)
686              color = wxLIGHT_GREY              color = wxLIGHT_GREY
687    
688          self.SetItemTextColour(id, color)          self.SetItemTextColour(id, color)
689          self.SetItemFont(id, font)          self.SetItemFont(id, font)
690                    
691      def __ShowHideLayer(self, layer):      def __ShowHideLayer(self, layer):
692          parent = self.layer2id[layer]          parent = self.find_layer(layer)
693          assert parent.IsOk()          assert parent.IsOk()
694    
695          visible = layer.Visible()          visible = layer.Visible()
696    
697          self.__SetVisibilityStyle(visible, parent)          self.__SetVisibilityStyle(visible, parent)
698    
699          id, cookie = self.GetFirstChild(parent, 123)          id, cookie = self.GetFirstChild(parent)
700    
701          while id.IsOk():          while id.IsOk():
702              self.__SetVisibilityStyle(visible, id)              self.__SetVisibilityStyle(visible, id)
703              id, cookie = self.GetNextChild(parent, cookie)              id, cookie = self.GetNextChild(parent, cookie)
704                
705        # In wxPython 2.4 the GetFirstChild method has to be called with a
706        # second argument and in 2.5 it must not.  Reading the code of
707        # wxPython 2.4 it seems that the second parameter was intended to be
708        # optional there but due to a bug in the C++ code it doesn't work
709        # and omitting the second argument leads to a segfault.  To cope
710        # with this and to make the code usable with both 2.5 and 2.4 we
711        # overwrite the inherited method when running with 2.4 to provide a
712        # default value for the second argument.
713        if map(int, wxPython.__version__.split(".")[:2]) < [2, 5]:
714            def GetFirstChild(self, item):
715                return wxTreeCtrl.GetFirstChild(self, item, 0)
716    
717    
718    class ScaleBarBitmap(wxBoxSizer):
719    
720        def __init__(self, parent, map, mainWindow):
721            # While the width is fixed, get the height _now_.
722            dc = wxMemoryDC()
723            textwidth, textheight = dc.GetTextExtent("%d"%0)
724            self.width = 210
725            self.height = textheight + 3*2 + 8
726    
727            wxBoxSizer.__init__(self, wxVERTICAL)
728            bmp=wxEmptyBitmap(self.width, self.height)
729            self.scalebarBitmap = wxStaticBitmap(parent, -1, bmp)
730            self.Add(self.scalebarBitmap, 0, wxALIGN_CENTER|wxLEFT|wxTOP|wxRIGHT, 1)
731    
732            self.mainWindow = mainWindow
733            self.parent = parent
734            self.canvas = None
735            self.SetCanvas(self.mainWindow.canvas)
736    
737        def SetCanvas(self, canvas):
738            sub_list = [(SCALE_CHANGED, self._OnMsgScaleChanged)]
739    
740            if self.canvas is not None:
741                for msg, func in sub_list: self.canvas.Unsubscribe(msg, func)
742            
743            self.canvas = canvas
744            self.scalebar = ScaleBar(canvas.map)
745    
746            if self.canvas is not None:
747                for msg, func in sub_list: self.canvas.Subscribe(msg, func)
748                self.__SetScale(self.canvas.scale)
749    
750        def _OnMsgScaleChanged(self, scale):
751            self.__SetScale(scale)
752    
753        def __SetScale(self, scale):
754            bmp = wxEmptyBitmap(self.width, self.height)
755            dc = wxMemoryDC()
756            dc.SelectObject(bmp)
757            dc.Clear()
758    
759            if self.canvas.map is not None \
760                and self.canvas.map.projection is not None:
761    
762                # if we are using a projection with geographics coordinates
763                # we need to change the scale value based on where we are
764                # on the globe.
765                if self.canvas.map.projection.GetProjectedUnits() \
766                    == PROJ_UNITS_DEGREES:
767    
768                    width, height = self.canvas.GetSizeTuple()
769                    long, lat = self.canvas.win_to_proj(width/2, height/2)
770    
771                    # slightly inaccurate, but if we are looking at
772                    # the north/south pole we could end up dividing by zero
773                    #
774                    # it shouldn't matter for our purposes that we ignore
775                    # the original sign of lat.
776                    if fabs(lat) > 89.9: lat = 89.9
777    
778                    #
779                    # one degree is about 111,133m at the equator
780                    # we need to adjust that for latitude as
781                    # we move north/south. use the center of the map
782                    # as the point to scale the length to.
783                    #
784                    scale = scale / (111133.0 * fabs(cos(lat * pi/180)))
785    
786                self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())
787    
788            self.scalebarBitmap.SetBitmap(bmp)
789    
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