/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/legend.py
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trunk/thuban/Thuban/UI/legend.py revision 542 by jonathan, Thu Mar 20 09:43:16 2003 UTC branches/WIP-pyshapelib-bramz/Thuban/UI/legend.py revision 2734 by bramz, Thu Mar 1 12:42:59 2007 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  from wxPython.wx import *  import resource
16  from dialogs import NonModalDialog  
17    import wx
18    
19  from Thuban.Model.layer import Layer  from Thuban.Model.layer import BaseLayer
20  from Thuban.Model.map import Map  from Thuban.Model.map import Map
21    from Thuban.Model.classification import ClassGroup
22    from Thuban.Model.proj import PROJ_UNITS_DEGREES
23    
24  from Thuban.Model.messages import *  from Thuban.Model.messages import \
25        MAP_STACKING_CHANGED, MAP_LAYERS_ADDED, MAP_LAYERS_REMOVED, LAYER_CHANGED,\
26        LAYER_VISIBILITY_CHANGED, TITLE_CHANGED
27    
28  from Thuban.Model.classification import ClassGroup  from Thuban.UI.messages import SCALE_CHANGED
29    
30  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
31    from Thuban.UI.dock import DockPanel
32    from Thuban.UI.scalebar import ScaleBar
33    
34  ID_LEGEND_MOVEUP = 4001  from Thuban.UI.menu import Menu
 ID_LEGEND_MOVEDOWN = 4002  
 ID_LEGEND_TREE = 4003  
 ID_LEGEND_CLASSIFY = 4004  
 ID_LEGEND_SHOWLAYER = 4005  
 ID_LEGEND_HIDELAYER = 4006  
   
 BMP_SIZE_W = 30  
 BMP_SIZE_H = 15  
   
 class Legend(NonModalDialog):  
   
     def __init__(self, parent, name, map):  
         NonModalDialog.__init__(self, parent, name,  
                                 _("Legend: %s") % map.Title())  
35    
36          self.parent = parent  from Thuban.Lib.connector import ConnectorError
37    
38    ID_LEGEND_TOP = 4001
39    ID_LEGEND_RAISE = 4002
40    ID_LEGEND_LOWER = 4003
41    ID_LEGEND_BOTTOM = 4004
42    ID_LEGEND_TREE = 4005
43    ID_LEGEND_PROPS = 4006
44    ID_LEGEND_SHOWLAYER = 4007
45    ID_LEGEND_HIDELAYER = 4008
46    
47    BMP_SIZE_W = 16
48    BMP_SIZE_H = 16
49    
50    TOP_BMP = "top_layer"
51    RAISE_BMP = "raise_layer"
52    LOWER_BMP = "lower_layer"
53    BOTTOM_BMP = "bottom_layer"
54    SHOW_BMP  = "show_layer"
55    HIDE_BMP  = "hide_layer"
56    PROPS_BMP = "layer_properties"
57    
58          panel = wxPanel(self, -1)  class LegendPanel(DockPanel):
59    
60          topBox = wxBoxSizer(wxVERTICAL)      def __init__(self, parent, map, mainWindow):
61          panelBox = wxBoxSizer(wxVERTICAL)          DockPanel.__init__(self, parent, -1)
62    
63          buttonBox = wxGridSizer(2, 3, 0, 0)          self.mainWindow = mainWindow
64            self.parent = parent
65    
66          self.buttons = []          self.buttons = []
67    
68          button = wxButton(self, ID_LEGEND_MOVEUP, _("Move Up"))          panelBox = wx.BoxSizer(wx.VERTICAL)
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
69    
70          button = wxButton(self, ID_LEGEND_SHOWLAYER, _("Show Layer"))          self.toolBar = wx.ToolBar(self, -1)
71          buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)          self.toolBar.SetToolBitmapSize(wx.Size(24, 24))
         self.buttons.append(button)  
72    
73          button = wxButton(self, ID_LEGEND_CLASSIFY, _("Classify"))          bmp = resource.GetBitmapResource(TOP_BMP, wx.BITMAP_TYPE_XPM)
74          buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)          self.toolBar.AddTool(ID_LEGEND_TOP, bmp,
75          self.buttons.append(button)              shortHelpString=_("Top Layer"))
76    
77          button = wxButton(self, ID_LEGEND_MOVEDOWN, _("Move Down"))          bmp = resource.GetBitmapResource(RAISE_BMP, wx.BITMAP_TYPE_XPM)
78          buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)          self.toolBar.AddTool(ID_LEGEND_RAISE, bmp,
79          self.buttons.append(button)              shortHelpString=_("Raise Layer"))
80    
81          button = wxButton(self, ID_LEGEND_HIDELAYER, _("Hide Layer"))          bmp = resource.GetBitmapResource(LOWER_BMP, wx.BITMAP_TYPE_XPM)
82          buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)          self.toolBar.AddTool(ID_LEGEND_LOWER, bmp,
83          self.buttons.append(button)              shortHelpString=_("Lower Layer"))
84    
85            bmp = resource.GetBitmapResource(BOTTOM_BMP, wx.BITMAP_TYPE_XPM)
86            self.toolBar.AddTool(ID_LEGEND_BOTTOM, bmp,
87                shortHelpString=_("Bottom Layer"))
88    
89          EVT_BUTTON(self, ID_LEGEND_MOVEUP, self._OnMoveUp)          bmp = resource.GetBitmapResource(SHOW_BMP, wx.BITMAP_TYPE_XPM)
90          EVT_BUTTON(self, ID_LEGEND_MOVEDOWN, self._OnMoveDown)          self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp,
91          EVT_BUTTON(self, ID_LEGEND_CLASSIFY, self._OnClassify)              shortHelpString=_("Show Layer"))
         EVT_BUTTON(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)  
         EVT_BUTTON(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)  
92    
93          panelBox.Add(buttonBox, 0, 0, 4)          bmp = resource.GetBitmapResource(HIDE_BMP, wx.BITMAP_TYPE_XPM)
94            self.toolBar.AddTool(ID_LEGEND_HIDELAYER, bmp,
95                shortHelpString=_("Hide Layer"))
96    
97          self.tree = LegendTree(self, ID_LEGEND_TREE, map)          bmp = resource.GetBitmapResource(PROPS_BMP, wx.BITMAP_TYPE_XPM)
98            self.toolBar.AddTool(ID_LEGEND_PROPS, bmp,
99                shortHelpString=_("Edit Layer Properties"))
100    
101          panelBox.Add(self.tree, 1, wxGROW, 4)          self.toolBar.Realize()
102            panelBox.Add(self.toolBar, 0, wx.GROW, 0)
103    
104          panel.SetAutoLayout(True)          self.Bind(wx.EVT_TOOL, self._OnMoveTop, id=ID_LEGEND_TOP)
105          panel.SetSizer(panelBox)          self.Bind(wx.EVT_TOOL, self._OnMoveUp, id=ID_LEGEND_RAISE)
106          panelBox.SetSizeHints(panel)          self.Bind(wx.EVT_TOOL, self._OnMoveDown, id=ID_LEGEND_LOWER)
107            self.Bind(wx.EVT_TOOL, self._OnMoveBottom, id=ID_LEGEND_BOTTOM)
108            self.Bind(wx.EVT_TOOL, self._OnProperties, id=ID_LEGEND_PROPS)
109            self.Bind(wx.EVT_TOOL, self._OnShowLayer, id=ID_LEGEND_SHOWLAYER)
110            self.Bind(wx.EVT_TOOL, self._OnHideLayer, id=ID_LEGEND_HIDELAYER)
111    
112          topBox.Add(panel, 1, wxGROW, 0)          self.tree = LegendTree(self, ID_LEGEND_TREE, map, mainWindow)
113          panelBox.SetSizeHints(self)  
114            panelBox.Add(self.tree, 1, wx.GROW, 0)
115    
116            self.scalebarbitmap = ScaleBarBitmap(self, map, mainWindow)
117            panelBox.Add(self.scalebarbitmap, 0, wx.GROW, 0)
118    
119          self.SetAutoLayout(True)          self.SetAutoLayout(True)
120          self.SetSizer(topBox)          self.SetSizer(panelBox)
121            panelBox.SetSizeHints(self)
122    
123    
124            self.panelBox = panelBox
125    
126            self.__EnableButtons(False)
127    
128            self.Create()
129    
130            self.Bind(wx.EVT_CLOSE, self._OnClose)
131    
132    
133      def DoOnSelChanged(self):      def GetMap(self):
134          self.__EnableButtons(self.tree.GetSelection().IsOk())          return self.tree.GetMap()
135    
136      def _OnClassify(self, event):      def SetMap(self, map):
137          self.tree.DoOnClassify()          self.tree.SetMap(map)
138            self.scalebarbitmap.SetCanvas(self.mainWindow.canvas)
139    
140      def _OnMoveUp(self, event):      def DoOnSelChanged(self, layer, group):
141    
142            ok = isinstance(layer, BaseLayer)
143            self.__EnableButtons(ok)
144    
145            self.mainWindow.SelectLayer(layer)
146    
147        def DoOnProperties(self):
148            list = self.tree.GetSelectedHierarchy()
149    
150            ok = isinstance(list[0], BaseLayer)
151            if ok:
152                self.mainWindow.OpenLayerProperties(list[0], list[1])
153    
154        def Destroy(self):
155            self.__Close()
156    
157        def _OnProperties(self, event):
158            self.DoOnProperties()
159    
160        def _OnMoveTop(self, event):
161            self.tree.MoveCurrentItemTop()
162    
163        def _OnMoveUp(self, event):
164          self.tree.MoveCurrentItemUp()          self.tree.MoveCurrentItemUp()
165    
166      def _OnMoveDown(self, event):      def _OnMoveDown(self, event):
167          self.tree.MoveCurrentItemDown()          self.tree.MoveCurrentItemDown()
168    
169        def _OnMoveBottom(self, event):
170            self.tree.MoveCurrentItemBottom()
171    
172      def _OnShowLayer(self, event):      def _OnShowLayer(self, event):
173          self.tree.DoOnShowLayer()          self.tree.DoOnShowLayer()
174          pass          pass
175    
176        #def Close(self, force = False):
177            #DockPanel.Close(self, force)
178    
179        def _OnClose(self, event):
180            self.__Close()
181    
182      def _OnHideLayer(self, event):      def _OnHideLayer(self, event):
183          self.tree.DoOnHideLayer()          self.tree.DoOnHideLayer()
184          pass          pass
185    
186        def _OnToggleVisibility(self, event):
187            self.tree.ToggleVisibility()
188    
189      def __EnableButtons(self, on):      def _OnProjection(self, event):
190          for b in self.buttons:          self.tree.LayerProjection()
191              b.Enable(on)  
192        def _OnRemoveLayer(self, event):
193            self.mainWindow.RemoveLayer()
194    
195  class LegendTree(wxTreeCtrl):      def _OnShowTable(self, event):
196            self.mainWindow.LayerShowTable()
197    
198      def __init__(self, parent, id, map):      def __EnableButtons(self, on):
199          wxTreeCtrl.__init__(self, parent, id,          self.toolBar.EnableTool(ID_LEGEND_TOP, on)
200                              style = wxTR_DEFAULT_STYLE | wxTR_HIDE_ROOT,          self.toolBar.EnableTool(ID_LEGEND_RAISE, on)
201            self.toolBar.EnableTool(ID_LEGEND_LOWER, on)
202            self.toolBar.EnableTool(ID_LEGEND_BOTTOM, on)
203            self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER,  on)
204            self.toolBar.EnableTool(ID_LEGEND_HIDELAYER,  on)
205            self.toolBar.EnableTool(ID_LEGEND_PROPS, on)
206    
207        def __Close(self):
208            self.tree.Close()
209    
210    class LegendTree(wx.TreeCtrl):
211    
212        def __init__(self, parent, id, map, mainWindow):
213            wx.TreeCtrl.__init__(self, parent, id,
214                                style = wx.TR_DEFAULT_STYLE | wx.TR_HIDE_ROOT,
215                              size = (200, 200))                              size = (200, 200))
216    
217            self.mainWindow = mainWindow
218            self.map = None
219          self.parent = parent          self.parent = parent
220          self.map = map          self.changing_selection = 0
         self.layer2id = None  
221    
222            #
223            # The image list used by the wxTreeCtrl causes problems when
224            # we remove layers and/or change a classification because it
225            # changes the image indices if you remove images from the list.
226            # Rather than removing unused images we use this list to keep
227            # track of which indices are available in the image list
228            # (because of a previous removal) and then  replace those indices
229            # with new images rather than appending to the end of the image
230            # list (assuming there are any that are available).
231            #
232            self.availImgListIndices = []
233    
234          self.image_list = None          self.image_list = None
235          self.emptyImageIndex = 0          self.emptyImageIndex = 0
236    
237          self.previewer = ClassDataPreviewer()          self.previewer = ClassDataPreviewer()
238    
239            self.preventExpandCollapse = False
240            self.raiseProperties = False
241    
242          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)          self.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self._OnItemActivated, id=ID_LEGEND_TREE)
243          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)          self.Bind(wx.EVT_TREE_SEL_CHANGED, self._OnSelChanged, id=ID_LEGEND_TREE)
244            self.Bind(wx.EVT_TREE_ITEM_EXPANDING, self.OnItemExpandCollapse, id=ID_LEGEND_TREE)
245          map.Subscribe(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged)          self.Bind(wx.EVT_TREE_ITEM_COLLAPSING, self.OnItemExpandCollapse, id=ID_LEGEND_TREE)
246          map.Subscribe(MAP_LAYERS_CHANGED, self._OnMsgMapLayersChanged)          self.Bind(wx.EVT_TREE_ITEM_RIGHT_CLICK, self._OnRightClick, id=ID_LEGEND_TREE)
247    
248            self.Bind(wx.EVT_CLOSE, self._OnClose)
249    
250            self.SetMap(map)
251    
252        def _OnRightClick(self, event):
253            """Select item and pop up a context menu"""
254    
255            # The pop up menu is related to the legend tree, so we have direct
256            # access on the tree items. The events issued by the menu are handled
257            # by the legend panel, since most of the handlers are already
258            # implemented there.
259    
260            # Update item selection to the right click
261            item = event.GetItem()
262            self.SelectItem(item)
263    
264            # Define the menu
265            popup_menu = Menu("PopUp", "",
266                              [ "layer_visibility",
267                                None,
268                                "layer_properties",
269                                "layer_projection",
270                                "layer_remove",
271                                "layer_show_table",
272                                None,
273                                "layer_to_top",
274                                "layer_raise",
275                                "layer_lower",
276                                "layer_to_bottom"
277                                ])
278    
279            # Display the menu
280            pos = event.GetPoint()
281            shift = self.ClientToScreen((0,0))
282            self.PopupMenu(self.mainWindow.build_menu(popup_menu), pos)
283    
284        def find_layer(self, layer):
285            """Return the tree item for the layer"""
286            root = self.GetRootItem()
287            id, cookie = self.GetFirstChild(root)
288            while id.IsOk():
289                if self.GetPyData(id) is layer:
290                    return id
291                id, cookie = self.GetNextChild(root, cookie)
292            return None
293    
294        def _OnClose(self, event):
295            self.SetMap(None)
296    
297        def GetMap(self):
298            return self.map
299    
300        def SetMap(self, map):
301    
302            sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),
303                        (MAP_LAYERS_ADDED, self._OnMsgMapLayersAdded),
304                        (MAP_LAYERS_REMOVED, self._OnMsgMapLayersRemoved)]
305    
306            if self.map is not None:
307                for msg, func in sub_list: self.map.Unsubscribe(msg, func)
308                #self.mainWindow.application.Unsubscribe(SESSION_REPLACED,
309                    #self._OnMsgMapsChanged)
310                #try:
311                    #self.mainWindow.application.session.Unsubscribe(MAPS_CHANGED,
312                        #self._OnMsgMapsChanged)
313                #except ConnectorError:
314                    #pass
315                self.DeleteAllItems()
316    
317          self.__FillTree(map)          self.map = map
318    
319      def MoveCurrentItemUp(self):          if self.map is not None:
320          cur_id = self.GetSelection()              for msg, func in sub_list: self.map.Subscribe(msg, func)
321          assert(cur_id.IsOk())              #self.mainWindow.application.session.Subscribe(MAPS_CHANGED,
322                    #self._OnMsgMapsChanged)
323                #self.mainWindow.application.Subscribe(SESSION_REPLACED,
324                    #self._OnMsgMapsChanged)
325                self.__FillTree(self.map)
326    
327          cur_data = self.GetPyData(cur_id)      def MoveCurrentItemTop(self):
328            layer, group = self.GetSelectedHierarchy()
329    
330          #prev_id = self.GetPrevSibling(cur_id)          if layer is not None:
331                self.map.MoveLayerToTop(layer)
332            else:
333                assert False, "Shouldn't be allowed."
334                pass
335    
336          #      def MoveCurrentItemUp(self):
337          # Get out if there's nowhere to go          layer, group = self.GetSelectedHierarchy()
         #  
         #if prev_id == INVALID_TREE_ID: return  
338    
339          if isinstance(cur_data, Layer):          if layer is not None:
340              self.map.RaiseLayer(cur_data)              self.map.RaiseLayer(layer)
         elif isinstance(cur_data, ClassGroup):  
             pass  
341          else:          else:
342              assert(False, "Shouldn't be here.")              assert False, "Shouldn't be allowed."
343              pass              pass
344    
345      def MoveCurrentItemDown(self):      def MoveCurrentItemDown(self):
346          cur_id = self.GetSelection()          layer, group = self.GetSelectedHierarchy()
         assert(cur_id.IsOk())  
347    
348          cur_data = self.GetPyData(cur_id)          if layer is not None:
349                self.map.LowerLayer(layer)
         if isinstance(cur_data, Layer):  
             self.map.LowerLayer(cur_data)  
         elif isinstance(cur_data, ClassGroup):  
             pass  
350          else:          else:
351              assert(False, "Shouldn't be here.")              assert False, "Shouldn't be allowed."
352              pass              pass
353    
354        def MoveCurrentItemBottom(self):
355            layer, group = self.GetSelectedHierarchy()
356    
357            if layer is not None:
358                self.map.MoveLayerToBottom(layer)
359            else:
360                assert False, "Shouldn't be allowed."
361                pass
362    
363      def OnCompareItems(self, item1, item2):      def OnCompareItems(self, item1, item2):
364    
365          data1 = self.GetPyData(item1)          data1 = self.GetPyData(item1)
366          data2 = self.GetPyData(item2)          data2 = self.GetPyData(item2)
367    
368          if isinstance(data1, Layer):          if isinstance(data1, BaseLayer):
369              layers = self.map.Layers()              layers = self.map.Layers()
370              return layers.index(data2) - layers.index(data1)              return layers.index(data2) - layers.index(data1)
371          else:          else:
372              return wxTreeCtrl.OnCompareItems(self, item1, item2)              return wx.TreeCtrl.OnCompareItems(self, item1, item2)
   
373    
374      def DoOnShowLayer(self):      def DoOnShowLayer(self):
375          self.__ShowHideLayer(True)          layer, group = self.GetSelectedHierarchy()
376            layer.SetVisible(True)
377    
378      def DoOnHideLayer(self):      def DoOnHideLayer(self):
379          self.__ShowHideLayer(False)          layer, group = self.GetSelectedHierarchy()
380            layer.SetVisible(False)
381    
382      def DoOnClassify(self):      def ToggleVisibility(self):
383          id = self.GetSelection()          layer, group = self.GetSelectedHierarchy()
         assert(id.IsOk())  
384    
385          item = self.GetPyData(id)          layer.SetVisible(not layer.Visible())
         if isinstance(item, ClassGroup):  
             id = self.GetItemParent(id)  
             assert(id.IsOk())  
             item = self.GetPyData(id)  
386    
387          self.parent.parent.OpenClassifier(item)      def LayerProjection(self):
388            self.parent.mainWindow.LayerProjection()
389    
390      def Sort(self):      def Sort(self):
391          self.SortChildren(self.GetRootItem())          self.SortChildren(self.GetRootItem())
392    
393        def GetSelectedHierarchy(self):
394            id = self.GetSelection()
395    
396            if not id.IsOk():
397                return (None, None)
398    
399            layer = self.GetPyData(id)
400            group = None
401    
402            if isinstance(layer, ClassGroup):
403                id = self.GetItemParent(id)
404                assert id.IsOk()
405                group = layer
406                layer = self.GetPyData(id)
407    
408            return (layer, group)
409    
410        def _OnMsgMapsChanged(self):
411            #print self.map is self.mainWindow.Map()
412            self.SetMap(self.mainWindow.Map())
413    
414      def _OnSelChanged(self, event):      def _OnSelChanged(self, event):
415          self.parent.DoOnSelChanged()          # If we change the selection from normalize_selection do nothing.
416            if self.changing_selection:
417                return
418    
419            self.normalize_selection()
420            self.__UpdateSelection()
421    
422        def normalize_selection(self):
423            """Select the layer containing currently selected item"""
424            # This is really a workaround for a bug in wx where deleting a
425            # subtree with DeleteChildren does not update the selection
426            # properly and can lead to segfaults later because the return
427            # value of GetSelection points to invalid data.
428            item = self.GetSelection()
429            while item.IsOk():
430                object = self.GetPyData(item)
431                if isinstance(object, BaseLayer):
432                    break
433                item = self.GetItemParent(item)
434            else:
435                # No layer was found in the chain of parents, so there's
436                # nothing we can do.
437                return
438    
439            self.changing_selection = 1
440            try:
441                self.SelectItem(item)
442            finally:
443                self.changing_selection = 0
444    
445    
446        def OnItemExpandCollapse(self, event):
447            if self.preventExpandCollapse:
448                event.Veto()
449                self.preventExpandCollapse = False
450    
451      def _OnItemActivated(self, event):      def _OnItemActivated(self, event):
452          self.DoOnClassify()          # The following looks strange but is need under Windows to
453            # raise the Properties on double-click: The tree control
454            # always gets an Expanded / Collapsed event after the ItemActivated
455            # on double click, which raises the main window again. We add a second
456            # ItemActivated event to the queue, which simply raises the already
457            # displayed window.
458            if self.raiseProperties:
459                self.parent.DoOnProperties()
460                self.raiseProperties = False
461            else:
462                self.raiseProperties = True
463                self.preventExpandCollapse = True
464                self.parent.DoOnProperties()
465                self.AddPendingEvent(event)
466    
467      def _OnMsgLayerChanged(self, layer):      def _OnMsgLayerChanged(self, layer):
468          assert(isinstance(layer, Layer))          assert isinstance(layer, BaseLayer)
469    
470          id = self.layer2id[layer]          id = self.find_layer(layer)
471            assert id is not None
472    
473          self.__FillTreeLayer(id)          self.__FillTreeLayer(id)
474            self.__UpdateSelection()
475    
476      def _OnMsgMapStackingChanged(self, *args):      def _OnMsgMapStackingChanged(self, *args):
477          self.Sort()          self.Sort()
478            id = self.GetSelection()
479    
480      def _OnMsgMapLayersChanged(self, map):          if id.IsOk():
481          assert(id(map) == id(self.map))              self.EnsureVisible(id)
482            self.__UpdateSelection()
483    
484          self.__FillTree(self.map)      def _OnMsgMapLayersAdded(self, map):
485            assert map is self.map
486    
487      def __FillTree(self, map):          # Build a dict with all layers known by the the tree as keys
488            layers = {}
489            root = self.GetRootItem()
490            id, cookie = self.GetFirstChild(root)
491            while id.IsOk():
492                layers[self.GetPyData(id)] = 1
493                id, cookie = self.GetNextChild(root, cookie)
494    
495          assert(isinstance(map, Map))          # Add layers in the map but not in the dict
496            i = 0
497            for l in map.Layers():
498                if not l in layers:
499                    self.__AddLayer(i, l)
500    
501          self.Freeze()          self.__UpdateSelection()
502    
503          self.__DeleteAllItems()      def _OnMsgMapLayersRemoved(self, map):
504            assert map is self.map
505    
506          if map.HasLayers():          layers = map.Layers()
507    
508              self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)          root = self.GetRootItem()
509                                                                                            id, cookie = self.GetFirstChild(root)
510              bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)          while id.IsOk():
511              dc = wxMemoryDC()              if self.GetPyData(id) not in layers:
512              dc.SelectObject(bmp)                  self.__RemoveLayer(id)
513              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)  
514    
             root = self.AddRoot("")  
515    
516              for l in map.Layers():          self.__UpdateSelection()
517                  id = self.PrependItem(root, l.Title())  
518                  l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)      def _OnMsgLayerVisibilityChanged(self, layer):
519                  self.SetPyData(id, l)          assert isinstance(layer, BaseLayer)
                 font = self.GetItemFont(id)  
                 if not l.Visible():  
                     font.SetStyle(wxITALIC)  
                     self.SetItemFont(id, font)  
520    
521                  self.layer2id[l] = id          self.__ShowHideLayer(layer)
522            self.__UpdateSelection()
523    
524                  self.__FillTreeLayer(id)      def _OnMsgLayerTitleChanged(self, layer):
525                  self.Expand(id)  
526            id = self.find_layer(layer)
527            if id.IsOk():
528                self.SetItemText(id, layer.Title())
529            self.__UpdateSelection()
530    
531        def __UpdateSelection(self):
532            layer, group = self.GetSelectedHierarchy()
533            self.parent.DoOnSelChanged(layer, group)
534    
535        def __FillTree(self, map):
536    
537            self.Freeze()
538    
539            self.DeleteAllItems()
540    
541            if map.HasLayers():
542                root = self.GetRootItem()
543                for l in map.Layers():
544                    self.__AddLayer(0, l)
545    
546          self.Thaw()          self.Thaw()
547    
548      def __FillTreeLayer(self, pid):      def __FillTreeLayer(self, pid):
549    
550          layer = self.GetPyData(pid)          layer = self.GetPyData(pid)
551    
552          self.Freeze()          self.Freeze()
553    
554          self.DeleteChildren(pid)          self.DeleteChildren(pid)
555    
556          clazz = layer.GetClassification()          if layer.HasClassification():
   
         shapeType = layer.ShapeType()  
   
         for g in clazz:  
             id = self.AppendItem(pid, g.GetDisplayText())  
             self.SetPyData(id, g)  
557    
558              bmp = self.__BuildGroupImage(g, shapeType)              clazz = layer.GetClassification()
559    
560              if bmp is None:              shapeType = layer.ShapeType()
                 self.SetItemImage(id, self.emptyImageIndex)  
             else:  
                 i = self.image_list.Add(bmp)  
                 self.SetItemImage(id, i)  
561    
562              #self.layer2id[g] = id              show = layer.Visible()
563                for g in clazz:
564                    if g.IsVisible():
565                        id = self.AppendItem(pid, g.GetDisplayText())
566                        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, wx.TreeItemIcon_Normal)
573                            self.SetItemImage(id, -1, wx.TreeItemIcon_Selected)
574                            #self.SetItemSelectedImage(id, -1)
575                        else:
576                            if self.availImgListIndices:
577                                i = self.availImgListIndices.pop(0)
578                                self.image_list.Replace(i, bmp)
579                            else:
580                                i = self.image_list.Add(bmp)
581    
582                            self.SetItemImage(id, i, wx.TreeItemIcon_Normal)
583                            self.SetItemImage(id, i, wx.TreeItemIcon_Selected)
584                            #self.SetItemlectedImage(id, i)
585    
586          self.Thaw()          self.Thaw()
587    
588      def __BuildGroupImage(self, group, shapeType):      def __BuildGroupImage(self, group, shapeType):
         assert(isinstance(group, ClassGroup))  
589    
590          bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)          bmp = wx.EmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
591          #brush = wxBrush(Color2wxColour(item[1]), wxSOLID)          #brush = wxBrush(Color2wxColour(item[1]), wxSOLID)
592          dc = wxMemoryDC()          dc = wx.MemoryDC()
593          dc.SelectObject(bmp)          dc.SelectObject(bmp)
594          dc.Clear()          dc.Clear()
595    
# Line 316  class LegendTree(wxTreeCtrl): Line 597  class LegendTree(wxTreeCtrl):
597    
598          return bmp          return bmp
599    
600      def __DeleteAllItems(self):      def DeleteAllItems(self):
         self.DeleteAllItems()  
         self.layer2id = {}  
601    
602            pid = self.GetRootItem()
603    
604      def __ShowHideLayer(self, show):          id, cookie = self.GetFirstChild(pid)
605          id = self.GetSelection()          while id.IsOk():
606          assert(id.IsOk())              self.__RemoveLayer(id)
607                        id, cookie = self.GetNextChild(pid, cookie)
608          item = self.GetPyData(id)  
609          if isinstance(item, ClassGroup):          wx.TreeCtrl.DeleteAllItems(self)
610              id = self.GetItemParent(id)  
611              assert(id.IsOk())      def __AddLayer(self, before, l):
612              item = self.GetPyData(id)          root = self.GetRootItem()
613            id = self.InsertItemBefore(root, before,
614                                l.Title(),
615                                self.mapImageIndex,
616                                self.mapImageIndex)
617    
618            self.SetPyData(id, l)
619            self.__SetVisibilityStyle(l.Visible(), id)
620    
621          if show != item.Visible():          self.__FillTreeLayer(id)
622            self.Expand(id)
623    
624            l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)
625            l.Subscribe(LAYER_VISIBILITY_CHANGED,
626                        self._OnMsgLayerVisibilityChanged)
627            l.Subscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
628    
629        def __RemoveLayer(self, id):
630            self.DeleteChildren(id)
631    
632            layer = self.GetPyData(id)
633            layer.Unsubscribe(LAYER_CHANGED,
634                              self._OnMsgLayerChanged)
635            layer.Unsubscribe(LAYER_VISIBILITY_CHANGED,
636                              self._OnMsgLayerVisibilityChanged)
637            layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
638    
639            self.Delete(id)
640    
641        def DeleteChildren(self, pid):
642            id, cookie = self.GetFirstChild(pid)
643            while id.IsOk():
644                self.availImgListIndices.append(self.GetItemImage(id))
645                id, cookie = self.GetNextChild(pid, cookie)
646            wx.TreeCtrl.DeleteChildren(self, pid)
647    
648        def GetRootItem(self):
649            root = wx.TreeCtrl.GetRootItem(self)
650    
651            if not root.IsOk():
652                self.image_list = wx.ImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)
653    
654                bmp = wx.EmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
655                dc = wx.MemoryDC()
656                dc.SelectObject(bmp)
657                dc.SetBrush(wx.BLACK_BRUSH)
658                dc.Clear()
659                dc.SelectObject(wx.NullBitmap)
660    
661                self.emptyImageIndex = \
662                    self.image_list.AddWithColourMask(bmp, wx.Colour(0, 0, 0))
663    
664                bmp = resource.GetBitmapResource("legend_icon_layer",
665                                                  wx.BITMAP_TYPE_XPM)
666                self.mapImageIndex = \
667                    self.image_list.Add(bmp)
668    
669                self.AssignImageList(self.image_list)
670                self.availImgListIndices = []
671    
672                root = self.AddRoot("")
673    
674            return root
675    
676        def __SetVisibilityStyle(self, visible, id):
677            font = self.GetItemFont(id)
678    
679            if visible:
680                font.SetStyle(wx.NORMAL)
681                color = wx.BLACK
682            else:
683                #font.SetStyle(wxITALIC)
684                font.SetStyle(wx.NORMAL)
685                color = wx.LIGHT_GREY
686    
687            self.SetItemTextColour(id, color)
688            self.SetItemFont(id, font)
689    
690        def __ShowHideLayer(self, layer):
691            parent = self.find_layer(layer)
692            assert parent.IsOk()
693    
694            visible = layer.Visible()
695    
696            self.__SetVisibilityStyle(visible, parent)
697    
698            id, cookie = self.GetFirstChild(parent)
699    
700            while id.IsOk():
701                self.__SetVisibilityStyle(visible, id)
702                id, cookie = self.GetNextChild(parent, cookie)
703    
704        # In wxPython 2.4 the GetFirstChild method has to be called with a
705        # second argument and in 2.5 it must not.  Reading the code of
706        # wxPython 2.4 it seems that the second parameter was intended to be
707        # optional there but due to a bug in the C++ code it doesn't work
708        # and omitting the second argument leads to a segfault.  To cope
709        # with this and to make the code usable with both 2.5 and 2.4 we
710        # overwrite the inherited method when running with 2.4 to provide a
711        # default value for the second argument.
712        if map(int, wx.__version__.split(".")[:2]) < [2, 5]:
713            def GetFirstChild(self, item):
714                return wx.TreeCtrl.GetFirstChild(self, item, 0)
715    
716    
717    class ScaleBarBitmap(wx.BoxSizer):
718    
719        def __init__(self, parent, map, mainWindow):
720            # While the width is fixed, get the height _now_.
721            dc = wx.MemoryDC()
722            textwidth, textheight = dc.GetTextExtent("%d"%0)
723            self.width = 210
724            self.height = textheight + 3*2 + 8
725    
726            wx.BoxSizer.__init__(self, wx.VERTICAL)
727            bmp=wx.EmptyBitmap(self.width, self.height)
728            self.scalebarBitmap = wx.StaticBitmap(parent, -1, bmp)
729            self.Add(self.scalebarBitmap, 0, wx.ALIGN_CENTER|wx.LEFT|wx.TOP|wx.RIGHT, 1)
730    
731            self.mainWindow = mainWindow
732            self.parent = parent
733            self.canvas = None
734            self.SetCanvas(self.mainWindow.canvas)
735    
736        def SetCanvas(self, canvas):
737            sub_list = [(SCALE_CHANGED, self._OnMsgScaleChanged)]
738    
739            if self.canvas is not None:
740                for msg, func in sub_list: self.canvas.Unsubscribe(msg, func)
741    
742            self.canvas = canvas
743            self.scalebar = ScaleBar(canvas.map)
744    
745            if self.canvas is not None:
746                for msg, func in sub_list: self.canvas.Subscribe(msg, func)
747                self.__SetScale(self.canvas.scale)
748    
749        def _OnMsgScaleChanged(self, scale):
750            self.__SetScale(scale)
751    
752        def __SetScale(self, scale):
753            bmp = wx.EmptyBitmap(self.width, self.height)
754            dc = wx.MemoryDC()
755            dc.SelectObject(bmp)
756            dc.Clear()
757    
758              item.SetVisible(show)          if self.canvas.map is not None \
759                and self.canvas.map.projection is not None:
760    
761              font = self.GetItemFont(id)              # if we are using a projection with geographics coordinates
762              if show:              # we need to change the scale value based on where we are
763                  font.SetStyle(wxNORMAL)              # on the globe.
764                  self.SetItemFont(id, font)              if self.canvas.map.projection.GetProjectedUnits() \
765              else:                  == PROJ_UNITS_DEGREES:
766                  font.SetStyle(wxITALIC)  
767                  self.SetItemFont(id, font)                  width, height = self.canvas.GetSizeTuple()
768                    long, lat = self.canvas.win_to_proj(width/2, height/2)
769    
770                    # slightly inaccurate, but if we are looking at
771                    # the north/south pole we could end up dividing by zero
772                    #
773                    # it shouldn't matter for our purposes that we ignore
774                    # the original sign of lat.
775                    if fabs(lat) > 89.9: lat = 89.9
776    
777                    #
778                    # one degree is about 111,133m at the equator
779                    # we need to adjust that for latitude as
780                    # we move north/south. use the center of the map
781                    # as the point to scale the length to.
782                    #
783                    scale = scale / (111133.0 * fabs(cos(lat * pi/180)))
784    
785                self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())
786    
787            self.scalebarBitmap.SetBitmap(bmp)
788    
Legend:
Removed from v.542  
changed lines
  Added in v.2734
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