/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/legend.py
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revision 542 by jonathan, Thu Mar 20 09:43:16 2003 UTC revision 2560 by bh, Tue Feb 8 20:25:22 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
16    
17  from wxPython.wx import *  from wxPython.wx import *
18  from dialogs import NonModalDialog  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
22    from Thuban.Model.classification import ClassGroup
23    from Thuban.Model.proj import PROJ_UNITS_DEGREES
24    
25  from Thuban.Model.messages import *  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.Model.classification import ClassGroup  from Thuban.UI.messages import SCALE_CHANGED
30    
31  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
32    from Thuban.UI.dock import DockPanel
33    from Thuban.UI.scalebar import ScaleBar
34    
35    from Thuban.UI.menu import Menu
36    
37  ID_LEGEND_MOVEUP = 4001  from Thuban.Lib.connector import ConnectorError
 ID_LEGEND_MOVEDOWN = 4002  
 ID_LEGEND_TREE = 4003  
 ID_LEGEND_CLASSIFY = 4004  
 ID_LEGEND_SHOWLAYER = 4005  
 ID_LEGEND_HIDELAYER = 4006  
38    
39  BMP_SIZE_W = 30  ID_LEGEND_TOP = 4001
40    ID_LEGEND_RAISE = 4002
41    ID_LEGEND_LOWER = 4003
42    ID_LEGEND_BOTTOM = 4004
43    ID_LEGEND_TREE = 4005
44    ID_LEGEND_PROPS = 4006
45    ID_LEGEND_SHOWLAYER = 4007
46    ID_LEGEND_HIDELAYER = 4008
47    
48    BMP_SIZE_W = 15
49  BMP_SIZE_H = 15  BMP_SIZE_H = 15
50    
51  class Legend(NonModalDialog):  TOP_BMP = "top_layer"
52    RAISE_BMP = "raise_layer"
53    LOWER_BMP = "lower_layer"
54    BOTTOM_BMP = "bottom_layer"
55    SHOW_BMP  = "show_layer"
56    HIDE_BMP  = "hide_layer"
57    PROPS_BMP = "layer_properties"
58    
59      def __init__(self, parent, name, map):  class LegendPanel(DockPanel):
         NonModalDialog.__init__(self, parent, name,  
                                 _("Legend: %s") % map.Title())  
60    
61          self.parent = parent      def __init__(self, parent, map, mainWindow):
62            DockPanel.__init__(self, parent, -1)
63    
64            self.mainWindow = mainWindow
65            self.parent = parent
66    
67          panel = wxPanel(self, -1)          self.buttons = []
68    
         topBox = wxBoxSizer(wxVERTICAL)  
69          panelBox = wxBoxSizer(wxVERTICAL)          panelBox = wxBoxSizer(wxVERTICAL)
70    
71          buttonBox = wxGridSizer(2, 3, 0, 0)          self.toolBar = wxToolBar(self, -1)
72            self.toolBar.SetToolBitmapSize(wxSize(24, 24))
73    
74          self.buttons = []          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)
79            self.toolBar.AddTool(ID_LEGEND_RAISE, bmp,
80                shortHelpString=_("Raise Layer"))
81    
82            bmp = resource.GetBitmapResource(LOWER_BMP, wxBITMAP_TYPE_XPM)
83            self.toolBar.AddTool(ID_LEGEND_LOWER, bmp,
84                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)
91            self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp,
92                shortHelpString=_("Show Layer"))
93    
94            bmp = resource.GetBitmapResource(HIDE_BMP, wxBITMAP_TYPE_XPM)
95            self.toolBar.AddTool(ID_LEGEND_HIDELAYER, bmp,
96                shortHelpString=_("Hide Layer"))
97    
98            bmp = resource.GetBitmapResource(PROPS_BMP, wxBITMAP_TYPE_XPM)
99            self.toolBar.AddTool(ID_LEGEND_PROPS, bmp,
100                shortHelpString=_("Edit Layer Properties"))
101    
102            self.toolBar.Realize()
103            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)
107            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)
110            EVT_TOOL(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)
111            EVT_TOOL(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)
112    
113          button = wxButton(self, ID_LEGEND_MOVEUP, _("Move Up"))          self.tree = LegendTree(self, ID_LEGEND_TREE, map, mainWindow)
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
114    
115          button = wxButton(self, ID_LEGEND_SHOWLAYER, _("Show Layer"))          panelBox.Add(self.tree, 1, wxGROW, 0)
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
116    
117          button = wxButton(self, ID_LEGEND_CLASSIFY, _("Classify"))          self.scalebarbitmap = ScaleBarBitmap(self, map, mainWindow)
118          buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)          panelBox.Add(self.scalebarbitmap, 0, wxGROW, 0)
         self.buttons.append(button)  
119    
120          button = wxButton(self, ID_LEGEND_MOVEDOWN, _("Move Down"))          self.SetAutoLayout(True)
121          buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)          self.SetSizer(panelBox)
122          self.buttons.append(button)          panelBox.SetSizeHints(self)
123    
         button = wxButton(self, ID_LEGEND_HIDELAYER, _("Hide Layer"))  
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
124    
125            self.panelBox = panelBox
126    
127          EVT_BUTTON(self, ID_LEGEND_MOVEUP, self._OnMoveUp)          self.__EnableButtons(False)
         EVT_BUTTON(self, ID_LEGEND_MOVEDOWN, self._OnMoveDown)  
         EVT_BUTTON(self, ID_LEGEND_CLASSIFY, self._OnClassify)  
         EVT_BUTTON(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)  
         EVT_BUTTON(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)  
128    
129          panelBox.Add(buttonBox, 0, 0, 4)          self.Create()
130    
131          self.tree = LegendTree(self, ID_LEGEND_TREE, map)          EVT_CLOSE(self, self._OnClose)
132    
         panelBox.Add(self.tree, 1, wxGROW, 4)  
133    
134          panel.SetAutoLayout(True)      def GetMap(self):
135          panel.SetSizer(panelBox)          return self.tree.GetMap()
         panelBox.SetSizeHints(panel)  
136    
137          topBox.Add(panel, 1, wxGROW, 0)      def SetMap(self, map):
138          panelBox.SetSizeHints(self)          self.tree.SetMap(map)
139            self.scalebarbitmap.SetCanvas(self.mainWindow.canvas)
140    
141          self.SetAutoLayout(True)      def DoOnSelChanged(self, layer, group):
142          self.SetSizer(topBox)  
143            ok = isinstance(layer, BaseLayer)
144            self.__EnableButtons(ok)
145    
146            self.mainWindow.SelectLayer(layer)
147    
148        def DoOnProperties(self):
149            list = self.tree.GetSelectedHierarchy()
150    
151            ok = isinstance(list[0], BaseLayer)
152            if ok:
153                self.mainWindow.OpenLayerProperties(list[0], list[1])
154    
155      def DoOnSelChanged(self):      def Destroy(self):
156          self.__EnableButtons(self.tree.GetSelection().IsOk())          self.__Close()
157    
158      def _OnClassify(self, event):      def _OnProperties(self, event):
159          self.tree.DoOnClassify()          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
176    
177        #def Close(self, force = False):
178            #DockPanel.Close(self, force)
179            
180        def _OnClose(self, event):
181            self.__Close()
182    
183      def _OnHideLayer(self, event):      def _OnHideLayer(self, event):
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          for b in self.buttons:          self.toolBar.EnableTool(ID_LEGEND_TOP, on)
201              b.Enable(on)          self.toolBar.EnableTool(ID_LEGEND_RAISE, on)
202            self.toolBar.EnableTool(ID_LEGEND_LOWER, on)
203            self.toolBar.EnableTool(ID_LEGEND_BOTTOM, on)
204            self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER,  on)
205            self.toolBar.EnableTool(ID_LEGEND_HIDELAYER,  on)
206            self.toolBar.EnableTool(ID_LEGEND_PROPS, on)
207    
208        def __Close(self):
209            self.tree.Close()
210    
211  class LegendTree(wxTreeCtrl):  class LegendTree(wxTreeCtrl):
212    
213      def __init__(self, parent, id, map):      def __init__(self, parent, id, map, mainWindow):
214          wxTreeCtrl.__init__(self, parent, id,          wxTreeCtrl.__init__(self, parent, id,
215                              style = wxTR_DEFAULT_STYLE | wxTR_HIDE_ROOT,                              style = wxTR_DEFAULT_STYLE | wxTR_HIDE_ROOT,
216                              size = (200, 200))                              size = (200, 200))
217    
218            self.mainWindow = mainWindow
219            self.map = None
220          self.parent = parent          self.parent = parent
221          self.map = map          self.changing_selection = 0
         self.layer2id = None  
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)
250    
251            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):
296            self.SetMap(None)
297    
298        def GetMap(self):
299            return self.map
300    
301        def SetMap(self, map):
302    
303            sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),
304                        (MAP_LAYERS_ADDED, self._OnMsgMapLayersAdded),
305                        (MAP_LAYERS_REMOVED, self._OnMsgMapLayersRemoved)]
306    
307            if self.map is not None:
308                for msg, func in sub_list: self.map.Unsubscribe(msg, func)
309                #self.mainWindow.application.Unsubscribe(SESSION_REPLACED,
310                    #self._OnMsgMapsChanged)
311                #try:
312                    #self.mainWindow.application.session.Unsubscribe(MAPS_CHANGED,
313                        #self._OnMsgMapsChanged)
314                #except ConnectorError:
315                    #pass
316                self.DeleteAllItems()
317            
318            self.map = map
319    
320          map.Subscribe(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged)          if self.map is not None:
321          map.Subscribe(MAP_LAYERS_CHANGED, self._OnMsgMapLayersChanged)              for msg, func in sub_list: self.map.Subscribe(msg, func)
322                #self.mainWindow.application.session.Subscribe(MAPS_CHANGED,
323          self.__FillTree(map)                  #self._OnMsgMapsChanged)
324                #self.mainWindow.application.Subscribe(SESSION_REPLACED,
325      def MoveCurrentItemUp(self):                  #self._OnMsgMapsChanged)
326          cur_id = self.GetSelection()              self.__FillTree(self.map)
         assert(cur_id.IsOk())  
327    
328          cur_data = self.GetPyData(cur_id)      def MoveCurrentItemTop(self):
329            layer, group = self.GetSelectedHierarchy()
330    
331          #prev_id = self.GetPrevSibling(cur_id)          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):
338          # Get out if there's nowhere to go          layer, group = self.GetSelectedHierarchy()
         #  
         #if prev_id == INVALID_TREE_ID: return  
339    
340          if isinstance(cur_data, Layer):          if layer is not None:
341              self.map.RaiseLayer(cur_data)              self.map.RaiseLayer(layer)
         elif isinstance(cur_data, ClassGroup):  
             pass  
342          else:          else:
343              assert(False, "Shouldn't be here.")              assert False, "Shouldn't be allowed."
344              pass              pass
345    
346      def MoveCurrentItemDown(self):      def MoveCurrentItemDown(self):
347          cur_id = self.GetSelection()          layer, group = self.GetSelectedHierarchy()
         assert(cur_id.IsOk())  
348    
349          cur_data = self.GetPyData(cur_id)          if layer is not None:
350                self.map.LowerLayer(layer)
         if isinstance(cur_data, Layer):  
             self.map.LowerLayer(cur_data)  
         elif isinstance(cur_data, ClassGroup):  
             pass  
351          else:          else:
352              assert(False, "Shouldn't be here.")              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):
376          self.__ShowHideLayer(True)          layer, group = self.GetSelectedHierarchy()
377            layer.SetVisible(True)
378    
379      def DoOnHideLayer(self):      def DoOnHideLayer(self):
380          self.__ShowHideLayer(False)          layer, group = self.GetSelectedHierarchy()
381            layer.SetVisible(False)
382    
383      def DoOnClassify(self):      def ToggleVisibility(self):
384          id = self.GetSelection()          layer, group = self.GetSelectedHierarchy()
         assert(id.IsOk())  
385    
386          item = self.GetPyData(id)          layer.SetVisible(not layer.Visible())
         if isinstance(item, ClassGroup):  
             id = self.GetItemParent(id)  
             assert(id.IsOk())  
             item = self.GetPyData(id)  
387    
388          self.parent.parent.OpenClassifier(item)      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    
394        def GetSelectedHierarchy(self):
395            id = self.GetSelection()
396    
397            if not id.IsOk():
398                return (None, None)
399    
400            layer = self.GetPyData(id)
401            group = None
402    
403            if isinstance(layer, ClassGroup):
404                id = self.GetItemParent(id)
405                assert id.IsOk()
406                group = layer
407                layer = self.GetPyData(id)
408    
409            return (layer, group)
410    
411        def _OnMsgMapsChanged(self):
412            #print self.map is self.mainWindow.Map()
413            self.SetMap(self.mainWindow.Map())
414            
415      def _OnSelChanged(self, event):      def _OnSelChanged(self, event):
416          self.parent.DoOnSelChanged()          # 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()
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.DoOnClassify()          # 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 is not None
473    
474          self.__FillTreeLayer(id)          self.__FillTreeLayer(id)
475            self.__UpdateSelection()
476    
477      def _OnMsgMapStackingChanged(self, *args):      def _OnMsgMapStackingChanged(self, *args):
478          self.Sort()          self.Sort()
479            id = self.GetSelection()
480    
481      def _OnMsgMapLayersChanged(self, map):          if id.IsOk():
482          assert(id(map) == id(self.map))              self.EnsureVisible(id)
483            self.__UpdateSelection()
484    
485          self.__FillTree(self.map)      def _OnMsgMapLayersAdded(self, map):
486            assert map is self.map
487    
488      def __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          assert(isinstance(map, Map))          # 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.Freeze()          self.__UpdateSelection()
503    
504          self.__DeleteAllItems()      def _OnMsgMapLayersRemoved(self, map):
505            assert map is self.map
506    
507          if map.HasLayers():          layers = map.Layers()
508    
509              self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)          root = self.GetRootItem()
510                                                                                            id, cookie = self.GetFirstChild(root)
511              bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)          while id.IsOk():
512              dc = wxMemoryDC()              if self.GetPyData(id) not in layers:
513              dc.SelectObject(bmp)                  self.__RemoveLayer(id)
514              dc.SetBrush(wxBLACK_BRUSH)              id, cookie = self.GetNextChild(root, cookie)
             dc.Clear()  
             dc.SelectObject(wxNullBitmap)  
                                                                                   
             self.emptyImageIndex = \  
                 self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))  
                                                                                   
             self.AssignImageList(self.image_list)  
515    
             root = self.AddRoot("")  
516    
517              for l in map.Layers():          self.__UpdateSelection()
518                  id = self.PrependItem(root, l.Title())  
519                  l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)      def _OnMsgLayerVisibilityChanged(self, layer):
520                  self.SetPyData(id, l)          assert isinstance(layer, BaseLayer)
521                  font = self.GetItemFont(id)  
522                  if not l.Visible():          self.__ShowHideLayer(layer)
523                      font.SetStyle(wxITALIC)          self.__UpdateSelection()
524                      self.SetItemFont(id, font)  
525        def _OnMsgLayerTitleChanged(self, layer):
526    
527                  self.layer2id[l] = id          id = self.find_layer(layer)
528            if id.IsOk():
529                self.SetItemText(id, layer.Title())
530            self.__UpdateSelection()
531    
532                  self.__FillTreeLayer(id)      def __UpdateSelection(self):
533                  self.Expand(id)          layer, group = self.GetSelectedHierarchy()
534            self.parent.DoOnSelChanged(layer, group)
535            
536        def __FillTree(self, map):
537    
538            self.Freeze()
539    
540            self.DeleteAllItems()
541    
542            if map.HasLayers():
543                root = self.GetRootItem()
544                for l in map.Layers():
545                    self.__AddLayer(0, l)
546    
547          self.Thaw()          self.Thaw()
548    
# Line 283  class LegendTree(wxTreeCtrl): Line 553  class LegendTree(wxTreeCtrl):
553    
554          self.DeleteChildren(pid)          self.DeleteChildren(pid)
555    
556          clazz = layer.GetClassification()          if layer.HasClassification():
   
         shapeType = layer.ShapeType()  
557    
558          for g in clazz:              clazz = layer.GetClassification()
             id = self.AppendItem(pid, g.GetDisplayText())  
             self.SetPyData(id, g)  
559    
560              bmp = self.__BuildGroupImage(g, shapeType)              shapeType = layer.ShapeType()
561    
562              if bmp is None:              show = layer.Visible()
563                  self.SetItemImage(id, self.emptyImageIndex)              for g in clazz:
564              else:                  if g.IsVisible():
565                  i = self.image_list.Add(bmp)                      id = self.AppendItem(pid, g.GetDisplayText())
566                  self.SetItemImage(id, i)                      self.SetPyData(id, g)
567                        self.__SetVisibilityStyle(show, id)
568    
569                        bmp = self.__BuildGroupImage(g, shapeType)
570    
571                        if bmp is None:
572                            self.SetItemImage(id, -1)
573                            self.SetItemSelectedImage(id, -1)
574                        else:
575                            if self.availImgListIndices:
576                                i = self.availImgListIndices.pop(0)
577                                self.image_list.Replace(i, bmp)
578                            else:
579                                i = self.image_list.Add(bmp)
580    
581              #self.layer2id[g] = id                          self.SetItemImage(id, i)
582                            self.SetItemSelectedImage(id, i)
583    
584          self.Thaw()          self.Thaw()
585    
586      def __BuildGroupImage(self, group, shapeType):      def __BuildGroupImage(self, group, shapeType):
         assert(isinstance(group, ClassGroup))  
587    
588          bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)          bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
589          #brush = wxBrush(Color2wxColour(item[1]), wxSOLID)          #brush = wxBrush(Color2wxColour(item[1]), wxSOLID)
# Line 316  class LegendTree(wxTreeCtrl): Line 595  class LegendTree(wxTreeCtrl):
595    
596          return bmp          return bmp
597    
598      def __DeleteAllItems(self):      def DeleteAllItems(self):
         self.DeleteAllItems()  
         self.layer2id = {}  
599    
600            pid = self.GetRootItem()
601    
602      def __ShowHideLayer(self, show):          id, cookie = self.GetFirstChild(pid)
603          id = self.GetSelection()          while id.IsOk():
604          assert(id.IsOk())              self.__RemoveLayer(id)
605                id, cookie = self.GetNextChild(pid, cookie)
606    
607            wxTreeCtrl.DeleteAllItems(self)
608    
609        def __AddLayer(self, before, l):
610            root = self.GetRootItem()
611            id = self.InsertItemBefore(root, before,
612                                l.Title(),
613                                self.mapImageIndex,
614                                self.mapImageIndex)
615    
616            self.SetPyData(id, l)
617            self.__SetVisibilityStyle(l.Visible(), id)
618    
619            self.__FillTreeLayer(id)
620            self.Expand(id)
621    
622            l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)
623            l.Subscribe(LAYER_VISIBILITY_CHANGED,
624                        self._OnMsgLayerVisibilityChanged)
625            l.Subscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
626    
627        def __RemoveLayer(self, id):
628            self.DeleteChildren(id)
629    
630            layer = self.GetPyData(id)
631            layer.Unsubscribe(LAYER_CHANGED,
632                              self._OnMsgLayerChanged)
633            layer.Unsubscribe(LAYER_VISIBILITY_CHANGED,
634                              self._OnMsgLayerVisibilityChanged)
635            layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
636    
637            self.Delete(id)
638    
639        def DeleteChildren(self, pid):
640            id, cookie = self.GetFirstChild(pid)
641            while id.IsOk():
642                self.availImgListIndices.append(self.GetItemImage(id))
643                id, cookie = self.GetNextChild(pid, cookie)
644            wxTreeCtrl.DeleteChildren(self, pid)
645    
646        def GetRootItem(self):
647            root = wxTreeCtrl.GetRootItem(self)
648    
649            if not root.IsOk():
650                self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)
651    
652                bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
653                dc = wxMemoryDC()
654                dc.SelectObject(bmp)
655                dc.SetBrush(wxBLACK_BRUSH)
656                dc.Clear()
657                dc.SelectObject(wxNullBitmap)
658    
659                self.emptyImageIndex = \
660                    self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
661    
662                bmp = resource.GetBitmapResource("legend_icon_layer",
663                                                  wxBITMAP_TYPE_XPM)
664                self.mapImageIndex = \
665                    self.image_list.Add(bmp)
666    
667                self.AssignImageList(self.image_list)
668                self.availImgListIndices = []
669    
670                root = self.AddRoot("")
671    
672            return root
673    
674        def __SetVisibilityStyle(self, visible, id):
675            font = self.GetItemFont(id)
676    
677            if visible:
678                font.SetStyle(wxNORMAL)
679                color = wxBLACK
680            else:
681                #font.SetStyle(wxITALIC)
682                font.SetStyle(wxNORMAL)
683                color = wxLIGHT_GREY
684    
685            self.SetItemTextColour(id, color)
686            self.SetItemFont(id, font)
687                    
688          item = self.GetPyData(id)      def __ShowHideLayer(self, layer):
689          if isinstance(item, ClassGroup):          parent = self.find_layer(layer)
690              id = self.GetItemParent(id)          assert parent.IsOk()
691              assert(id.IsOk())  
692              item = self.GetPyData(id)          visible = layer.Visible()
693    
694            self.__SetVisibilityStyle(visible, parent)
695    
696            id, cookie = self.GetFirstChild(parent)
697    
698          if show != item.Visible():          while id.IsOk():
699                self.__SetVisibilityStyle(visible, id)
700                id, cookie = self.GetNextChild(parent, cookie)
701    
702        # In wxPython 2.4 the GetFirstChild method has to be called with a
703        # second argument and in 2.5 it must not.  Reading the code of
704        # wxPython 2.4 it seems that the second parameter was intended to be
705        # optional there but due to a bug in the C++ code it doesn't work
706        # and omitting the second argument leads to a segfault.  To cope
707        # with this and to make the code usable with both 2.5 and 2.4 we
708        # overwrite the inherited method when running with 2.4 to provide a
709        # default value for the second argument.
710        if map(int, wxPython.__version__.split(".")[:2]) < [2, 5]:
711            def GetFirstChild(self, item):
712                return wxTreeCtrl.GetFirstChild(self, item, 0)
713    
714    
715    class ScaleBarBitmap(wxBoxSizer):
716    
717        def __init__(self, parent, map, mainWindow):
718            # While the width is fixed, get the height _now_.
719            dc = wxMemoryDC()
720            textwidth, textheight = dc.GetTextExtent("%d"%0)
721            self.width = 210
722            self.height = textheight + 3*2 + 8
723    
724            wxBoxSizer.__init__(self, wxVERTICAL)
725            bmp=wxEmptyBitmap(self.width, self.height)
726            self.scalebarBitmap = wxStaticBitmap(parent, -1, bmp)
727            self.Add(self.scalebarBitmap, 0, wxALIGN_CENTER|wxLEFT|wxTOP|wxRIGHT, 1)
728    
729            self.mainWindow = mainWindow
730            self.parent = parent
731            self.canvas = None
732            self.SetCanvas(self.mainWindow.canvas)
733    
734        def SetCanvas(self, canvas):
735            sub_list = [(SCALE_CHANGED, self._OnMsgScaleChanged)]
736    
737            if self.canvas is not None:
738                for msg, func in sub_list: self.canvas.Unsubscribe(msg, func)
739            
740            self.canvas = canvas
741            self.scalebar = ScaleBar(canvas.map)
742    
743            if self.canvas is not None:
744                for msg, func in sub_list: self.canvas.Subscribe(msg, func)
745                self.__SetScale(self.canvas.scale)
746    
747        def _OnMsgScaleChanged(self, scale):
748            self.__SetScale(scale)
749    
750        def __SetScale(self, scale):
751            bmp = wxEmptyBitmap(self.width, self.height)
752            dc = wxMemoryDC()
753            dc.SelectObject(bmp)
754            dc.Clear()
755    
756              item.SetVisible(show)          if self.canvas.map is not None \
757                and self.canvas.map.projection is not None:
758    
759              font = self.GetItemFont(id)              # if we are using a projection with geographics coordinates
760              if show:              # we need to change the scale value based on where we are
761                  font.SetStyle(wxNORMAL)              # on the globe.
762                  self.SetItemFont(id, font)              if self.canvas.map.projection.GetProjectedUnits() \
763              else:                  == PROJ_UNITS_DEGREES:
764                  font.SetStyle(wxITALIC)  
765                  self.SetItemFont(id, font)                  width, height = self.canvas.GetSizeTuple()
766                    long, lat = self.canvas.win_to_proj(width/2, height/2)
767    
768                    # slightly inaccurate, but if we are looking at
769                    # the north/south pole we could end up dividing by zero
770                    #
771                    # it shouldn't matter for our purposes that we ignore
772                    # the original sign of lat.
773                    if fabs(lat) > 89.9: lat = 89.9
774    
775                    #
776                    # one degree is about 111,133m at the equator
777                    # we need to adjust that for latitude as
778                    # we move north/south. use the center of the map
779                    # as the point to scale the length to.
780                    #
781                    scale = scale / (111133.0 * fabs(cos(lat * pi/180)))
782    
783                self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())
784    
785            self.scalebarBitmap.SetBitmap(bmp)
786    
Legend:
Removed from v.542  
changed lines
  Added in v.2560
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