/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/legend.py
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revision 562 by jonathan, Wed Mar 26 11:06:22 2003 UTC revision 1837 by frank, Tue Oct 21 09:29:52 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]>
4    # Frank Koormann <[email protected]>
5  #  #
6  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
7  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
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    
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
 from Thuban.Model.messages import *  
21  from Thuban.Model.classification import ClassGroup  from Thuban.Model.classification import ClassGroup
22    from Thuban.Model.proj import PROJ_UNITS_DEGREES
23    
24  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.Model.messages import \
25  from Thuban.UI.dock import DockPanel      MAP_STACKING_CHANGED, MAP_LAYERS_ADDED, MAP_LAYERS_REMOVED, LAYER_CHANGED,\
26        LAYER_VISIBILITY_CHANGED, TITLE_CHANGED
 ID_LEGEND_MOVEUP = 4001  
 ID_LEGEND_MOVEDOWN = 4002  
 ID_LEGEND_TREE = 4003  
 ID_LEGEND_CLASSIFY = 4004  
 ID_LEGEND_SHOWLAYER = 4005  
 ID_LEGEND_HIDELAYER = 4006  
 ID_LEGEND_DOCK = 4007  
 ID_LEGEND_UNDOCK = 4008  
   
 BMP_SIZE_W = 30  
 BMP_SIZE_H = 15  
   
 #class LegendDialog(NonModalDialog):  
   
     #def __init__(self, parent, name, panel):  
         #NonModalDialog.__init__(self, parent, name,  
                                 #_("Legend: %s") % map.Title())  
27    
28          ##topBox = wxBoxSizer(wxVERTICAL)  from Thuban.UI.messages import SCALE_CHANGED
29    
30          #panel = LegendPanel(self, map)  from Thuban.UI.classifier import ClassDataPreviewer
31    from Thuban.UI.dock import DockPanel
32    from Thuban.UI.scalebar import ScaleBar
33    
34          #self.panel = panel  from Thuban.Lib.connector import ConnectorError
35    
36          #topBox.Add(panel, 1, wxGROW, 4)  ID_LEGEND_TOP = 4001
37    ID_LEGEND_RAISE = 4002
38    ID_LEGEND_LOWER = 4003
39    ID_LEGEND_BOTTOM = 4004
40    ID_LEGEND_TREE = 4005
41    ID_LEGEND_PROPS = 4006
42    ID_LEGEND_SHOWLAYER = 4007
43    ID_LEGEND_HIDELAYER = 4008
44    
45    ID_POPUP_TOP = 4501
46    ID_POPUP_UP  = 4502
47    ID_POPUP_DOWN = 4503
48    ID_POPUP_BOTTOM = 4504
49    ID_POPUP_PROPS  = 4506
50    ID_POPUP_VISIBLE = 4507
51    ID_POPUP_PROJ = 4509
52    
53          ##self.SetAutoLayout(True)  BMP_SIZE_W = 15
54          ##self.SetSizer(topBox)  BMP_SIZE_H = 15
55    
56      #def GetLegendPanel(self):  TOP_BMP = "top_layer"
57          #return self.panel  RAISE_BMP = "raise_layer"
58    LOWER_BMP = "lower_layer"
59    BOTTOM_BMP = "bottom_layer"
60    SHOW_BMP  = "show_layer"
61    HIDE_BMP  = "hide_layer"
62    PROPS_BMP = "layer_properties"
63    
     #def OnClose(self, event):  
         #NonModalDialog.OnClose(self, event)  
64    
         #self.panel.SetMap(None)  
       
65  class LegendPanel(DockPanel):  class LegendPanel(DockPanel):
66    
67      def __init__(self, parent, map, mainWindow):      def __init__(self, parent, map, mainWindow):
# Line 64  class LegendPanel(DockPanel): Line 70  class LegendPanel(DockPanel):
70          self.mainWindow = mainWindow          self.mainWindow = mainWindow
71          self.parent = parent          self.parent = parent
72    
         panelBox = wxBoxSizer(wxVERTICAL)  
   
         buttonBox = wxGridSizer(2, 3, 0, 0)  
   
73          self.buttons = []          self.buttons = []
74    
75          button = wxButton(self, ID_LEGEND_MOVEUP, _("Move Up"))          panelBox = wxBoxSizer(wxVERTICAL)
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
   
         button = wxButton(self, ID_LEGEND_SHOWLAYER, _("Show Layer"))  
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
   
         button = wxButton(self, ID_LEGEND_CLASSIFY, _("Classify"))  
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
   
         button = wxButton(self, ID_LEGEND_MOVEDOWN, _("Move Down"))  
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
   
         button = wxButton(self, ID_LEGEND_HIDELAYER, _("Hide Layer"))  
         buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
         self.buttons.append(button)  
   
 #       button = wxButton(self, ID_LEGEND_DOCK, _("Dock"))  
 #       buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
 #       self.buttons.append(button)  
   
 #       button = wxButton(self, ID_LEGEND_UNDOCK, _("Undock"))  
 #       buttonBox.Add(button, 0, wxGROW | wxLEFT | wxRIGHT, 0)  
 #       self.buttons.append(button)  
   
   
         EVT_BUTTON(self, ID_LEGEND_MOVEUP, self._OnMoveUp)  
         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)  
         #EVT_BUTTON(self, ID_LEGEND_DOCK, self._OnDock)  
         #EVT_BUTTON(self, ID_LEGEND_UNDOCK, self._OnUndock)  
76    
77          panelBox.Add(buttonBox, 0, 0, 4)          self.toolBar = wxToolBar(self, -1)
78            self.toolBar.SetToolBitmapSize(wxSize(24, 24))
79    
80            bmp = resource.GetBitmapResource(TOP_BMP, wxBITMAP_TYPE_XPM)
81            self.toolBar.AddTool(ID_LEGEND_TOP, bmp,
82                shortHelpString=_("Top Layer"))
83    
84            bmp = resource.GetBitmapResource(RAISE_BMP, wxBITMAP_TYPE_XPM)
85            self.toolBar.AddTool(ID_LEGEND_RAISE, bmp,
86                shortHelpString=_("Raise Layer"))
87    
88            bmp = resource.GetBitmapResource(LOWER_BMP, wxBITMAP_TYPE_XPM)
89            self.toolBar.AddTool(ID_LEGEND_LOWER, bmp,
90                shortHelpString=_("Lower Layer"))
91    
92            bmp = resource.GetBitmapResource(BOTTOM_BMP, wxBITMAP_TYPE_XPM)
93            self.toolBar.AddTool(ID_LEGEND_BOTTOM, bmp,
94                shortHelpString=_("Bottom Layer"))
95    
96            bmp = resource.GetBitmapResource(SHOW_BMP, wxBITMAP_TYPE_XPM)
97            self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp,
98                shortHelpString=_("Show Layer"))
99    
100            bmp = resource.GetBitmapResource(HIDE_BMP, wxBITMAP_TYPE_XPM)
101            self.toolBar.AddTool(ID_LEGEND_HIDELAYER, bmp,
102                shortHelpString=_("Hide Layer"))
103    
104            bmp = resource.GetBitmapResource(PROPS_BMP, wxBITMAP_TYPE_XPM)
105            self.toolBar.AddTool(ID_LEGEND_PROPS, bmp,
106                shortHelpString=_("Edit Layer Properties"))
107    
108            self.toolBar.Realize()
109            panelBox.Add(self.toolBar, 0, wxGROW, 0)
110    
111            EVT_TOOL(self, ID_LEGEND_TOP, self._OnMoveTop)
112            EVT_TOOL(self, ID_LEGEND_RAISE, self._OnMoveUp)
113            EVT_TOOL(self, ID_LEGEND_LOWER, self._OnMoveDown)
114            EVT_TOOL(self, ID_LEGEND_BOTTOM, self._OnMoveBottom)
115            EVT_TOOL(self, ID_LEGEND_PROPS, self._OnProperties)
116            EVT_TOOL(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer)
117            EVT_TOOL(self, ID_LEGEND_HIDELAYER, self._OnHideLayer)
118    
119            EVT_MENU(self, ID_POPUP_PROPS, self._OnProperties)
120            EVT_MENU(self, ID_POPUP_TOP, self._OnMoveTop)
121            EVT_MENU(self, ID_POPUP_UP, self._OnMoveUp)
122            EVT_MENU(self, ID_POPUP_DOWN, self._OnMoveDown)
123            EVT_MENU(self, ID_POPUP_BOTTOM, self._OnMoveBottom)
124            EVT_MENU(self, ID_POPUP_VISIBLE, self._OnToggleVisibility)
125            EVT_MENU(self, ID_POPUP_PROJ, self._OnProjection)
126            
127          self.tree = LegendTree(self, ID_LEGEND_TREE, map, mainWindow)          self.tree = LegendTree(self, ID_LEGEND_TREE, map, mainWindow)
128    
129          panelBox.Add(self.tree, 1, wxGROW, 4)          panelBox.Add(self.tree, 1, wxGROW, 0)
130    
131            self.scalebarbitmap = ScaleBarBitmap(self, map, mainWindow)
132            panelBox.Add(self.scalebarbitmap, 0, wxGROW, 0)
133    
134          self.SetAutoLayout(True)          self.SetAutoLayout(True)
135          self.SetSizer(panelBox)          self.SetSizer(panelBox)
136          panelBox.SetSizeHints(self)          panelBox.SetSizeHints(self)
137    
         #panelBox.SetSizeHints(self.parent)  
138    
139          self.panelBox = panelBox          self.panelBox = panelBox
140    
141            self.__EnableButtons(False)
142    
143            self.Create()
144    
145            EVT_CLOSE(self, self._OnClose)
146    
147    
148      def GetMap(self):      def GetMap(self):
149          return self.tree.GetMap()          return self.tree.GetMap()
150    
151      def SetMap(self, map):      def SetMap(self, map):
152          self.tree.SetMap(map)          self.tree.SetMap(map)
153            self.scalebarbitmap.SetCanvas(self.mainWindow.canvas)
154    
155        def DoOnSelChanged(self, layer, group):
156    
157            ok = isinstance(layer, BaseLayer)
158            self.__EnableButtons(ok)
159    
160            self.mainWindow.SelectLayer(layer)
161    
162        def DoOnProperties(self):
163            list = self.tree.GetSelectedHierarchy()
164    
165            ok = isinstance(list[0], BaseLayer)
166            if ok:
167                self.mainWindow.OpenLayerProperties(list[0], list[1])
168    
169      def DoOnSelChanged(self):      def Destroy(self):
170          self.__EnableButtons(self.tree.GetSelection().IsOk())          self.__Close()
171    
172      def _OnClassify(self, event):      def _OnProperties(self, event):
173          self.tree.DoOnClassify()          self.DoOnProperties()
174    
175        def _OnMoveTop(self, event):
176            self.tree.MoveCurrentItemTop()
177            
178      def _OnMoveUp(self, event):      def _OnMoveUp(self, event):
179          self.tree.MoveCurrentItemUp()          self.tree.MoveCurrentItemUp()
180    
181      def _OnMoveDown(self, event):      def _OnMoveDown(self, event):
182          self.tree.MoveCurrentItemDown()          self.tree.MoveCurrentItemDown()
183    
184        def _OnMoveBottom(self, event):
185            self.tree.MoveCurrentItemBottom()
186    
187      def _OnShowLayer(self, event):      def _OnShowLayer(self, event):
188          self.tree.DoOnShowLayer()          self.tree.DoOnShowLayer()
189          pass          pass
190    
191        #def Close(self, force = False):
192            #DockPanel.Close(self, force)
193            
194        def _OnClose(self, event):
195            self.__Close()
196    
197      def _OnHideLayer(self, event):      def _OnHideLayer(self, event):
198          self.tree.DoOnHideLayer()          self.tree.DoOnHideLayer()
199          pass          pass
200    
201      def _OnDock(self, event):      def _OnToggleVisibility(self, event):
202          self.Dock()          self.tree.ToggleVisibility()
203    
204      def _OnUndock(self, event):      def _OnProjection(self, event):
205          self.UnDock()          self.tree.LayerProjection()
206    
207      def __EnableButtons(self, on):      def __EnableButtons(self, on):
208          for b in self.buttons:          self.toolBar.EnableTool(ID_LEGEND_TOP, on)
209              b.Enable(on)          self.toolBar.EnableTool(ID_LEGEND_RAISE, on)
210            self.toolBar.EnableTool(ID_LEGEND_LOWER, on)
211            self.toolBar.EnableTool(ID_LEGEND_BOTTOM, on)
212            self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER,  on)
213            self.toolBar.EnableTool(ID_LEGEND_HIDELAYER,  on)
214            self.toolBar.EnableTool(ID_LEGEND_PROPS, on)
215    
216        def __Close(self):
217            self.tree.Close()
218    
219  class LegendTree(wxTreeCtrl):  class LegendTree(wxTreeCtrl):
220    
# Line 164  class LegendTree(wxTreeCtrl): Line 223  class LegendTree(wxTreeCtrl):
223                              style = wxTR_DEFAULT_STYLE | wxTR_HIDE_ROOT,                              style = wxTR_DEFAULT_STYLE | wxTR_HIDE_ROOT,
224                              size = (200, 200))                              size = (200, 200))
225    
226            self.mainWindow = mainWindow
227          self.map = None          self.map = None
228          self.parent = parent          self.parent = parent
229          self.layer2id = None          self.changing_selection = 0
230    
231            #
232            # The image list used by the wxTreeCtrl causes problems when
233            # we remove layers and/or change a classification because it
234            # changes the image indices if you remove images from the list.
235            # Rather than removing unused images we use this list to keep
236            # track of which indices are available in the image list
237            # (because of a previous removal) and then  replace those indices
238            # with new images rather than appending to the end of the image
239            # list (assuming there are any that are available).
240            #
241            self.availImgListIndices = []
242    
243          self.image_list = None          self.image_list = None
244          self.emptyImageIndex = 0          self.emptyImageIndex = 0
245    
246          self.previewer = ClassDataPreviewer()          self.previewer = ClassDataPreviewer()
247    
248            self.preventExpandCollapse = False
249            self.raiseProperties = False
250    
251          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)          EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated)
252          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)          EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged)
253            EVT_TREE_ITEM_EXPANDING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
254            EVT_TREE_ITEM_COLLAPSING(self, ID_LEGEND_TREE, self.OnItemExpandCollapse)
255            EVT_TREE_ITEM_RIGHT_CLICK(self, ID_LEGEND_TREE, self._OnRightClick)
256    
257            EVT_CLOSE(self, self._OnClose)
258    
259          self.SetMap(map)          self.SetMap(map)
260    
261        def find_layer(self, layer):
262            """Return the tree item for the layer"""
263            root = self.GetRootItem()
264            id, cookie = self.GetFirstChild(root, 0)
265            while id.IsOk():
266                if self.GetPyData(id) is layer:
267                    return id
268                id, cookie = self.GetNextChild(root, cookie)
269            return None
270    
271        def _OnClose(self, event):
272            self.SetMap(None)
273    
274      def GetMap(self):      def GetMap(self):
275          return self.map          return self.map
276    
277      def SetMap(self, map):      def SetMap(self, map):
278    
279          sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),          sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged),
280                      (MAP_LAYERS_ADDED, self._OnMsgMapLayersAddedRemoved),                      (MAP_LAYERS_ADDED, self._OnMsgMapLayersAdded),
281                      (MAP_LAYERS_REMOVED, self._OnMsgMapLayersAddedRemoved)]                      (MAP_LAYERS_REMOVED, self._OnMsgMapLayersRemoved)]
282    
283          if self.map is not None:          if self.map is not None:
284              for msg, func in sub_list: self.map.Unsubscribe(msg, func)              for msg, func in sub_list: self.map.Unsubscribe(msg, func)
285              self.__DeleteAllItems()              #self.mainWindow.application.Unsubscribe(SESSION_REPLACED,
286                    #self._OnMsgMapsChanged)
287                #try:
288                    #self.mainWindow.application.session.Unsubscribe(MAPS_CHANGED,
289                        #self._OnMsgMapsChanged)
290                #except ConnectorError:
291                    #pass
292                self.DeleteAllItems()
293                    
294          self.map = map          self.map = map
295    
296          if self.map is not None:          if self.map is not None:
297              for msg, func in sub_list: self.map.Subscribe(msg, func)              for msg, func in sub_list: self.map.Subscribe(msg, func)
298                #self.mainWindow.application.session.Subscribe(MAPS_CHANGED,
299                    #self._OnMsgMapsChanged)
300                #self.mainWindow.application.Subscribe(SESSION_REPLACED,
301                    #self._OnMsgMapsChanged)
302              self.__FillTree(self.map)              self.__FillTree(self.map)
303    
304                    def MoveCurrentItemTop(self):
305      def MoveCurrentItemUp(self):          layer, group = self.GetSelectedHierarchy()
         cur_id = self.GetSelection()  
         assert(cur_id.IsOk())  
   
         cur_data = self.GetPyData(cur_id)  
306    
307          #prev_id = self.GetPrevSibling(cur_id)          if layer is not None:
308                self.map.MoveLayerToTop(layer)
309            else:
310                assert False, "Shouldn't be allowed."
311                pass
312    
313          #      def MoveCurrentItemUp(self):
314          # Get out if there's nowhere to go          layer, group = self.GetSelectedHierarchy()
         #  
         #if prev_id == INVALID_TREE_ID: return  
315    
316          if isinstance(cur_data, Layer):          if layer is not None:
317              self.map.RaiseLayer(cur_data)              self.map.RaiseLayer(layer)
         elif isinstance(cur_data, ClassGroup):  
             pass  
318          else:          else:
319              assert(False, "Shouldn't be here.")              assert False, "Shouldn't be allowed."
320              pass              pass
321    
322      def MoveCurrentItemDown(self):      def MoveCurrentItemDown(self):
323          cur_id = self.GetSelection()          layer, group = self.GetSelectedHierarchy()
         assert(cur_id.IsOk())  
   
         cur_data = self.GetPyData(cur_id)  
324    
325          if isinstance(cur_data, Layer):          if layer is not None:
326              self.map.LowerLayer(cur_data)              self.map.LowerLayer(layer)
         elif isinstance(cur_data, ClassGroup):  
             pass  
327          else:          else:
328              assert(False, "Shouldn't be here.")              assert False, "Shouldn't be allowed."
329              pass              pass
330    
331        def MoveCurrentItemBottom(self):
332            layer, group = self.GetSelectedHierarchy()
333    
334            if layer is not None:
335                self.map.MoveLayerToBottom(layer)
336            else:
337                assert False, "Shouldn't be allowed."
338                pass
339    
340      def OnCompareItems(self, item1, item2):      def OnCompareItems(self, item1, item2):
341    
342          data1 = self.GetPyData(item1)          data1 = self.GetPyData(item1)
343          data2 = self.GetPyData(item2)          data2 = self.GetPyData(item2)
344    
345          if isinstance(data1, Layer):          if isinstance(data1, BaseLayer):
346              layers = self.map.Layers()              layers = self.map.Layers()
347              return layers.index(data2) - layers.index(data1)              return layers.index(data2) - layers.index(data1)
348          else:          else:
349              return wxTreeCtrl.OnCompareItems(self, item1, item2)              return wxTreeCtrl.OnCompareItems(self, item1, item2)
350    
   
351      def DoOnShowLayer(self):      def DoOnShowLayer(self):
352          self.__ShowHideLayer(True)          layer, group = self.GetSelectedHierarchy()
353            layer.SetVisible(True)
354    
355      def DoOnHideLayer(self):      def DoOnHideLayer(self):
356          self.__ShowHideLayer(False)          layer, group = self.GetSelectedHierarchy()
357            layer.SetVisible(False)
358    
359      def DoOnClassify(self):      def ToggleVisibility(self):
360          id = self.GetSelection()          layer, group = self.GetSelectedHierarchy()
         assert(id.IsOk())  
         assert(id.IsOk())  
361    
362          item = self.GetPyData(id)          layer.SetVisible(not layer.Visible())
         if isinstance(item, ClassGroup):  
             id = self.GetItemParent(id)  
             assert(id.IsOk())  
             item = self.GetPyData(id)  
363    
364          # XXX: THIS IS SUCH AWFUL STYLE! YUCK!      def LayerProjection(self):
365          self.parent.mainWindow.OpenClassifier(item)          self.parent.mainWindow.LayerProjection()
         #assert(False, "XXX: FIXME HERE")  
366    
367      def Sort(self):      def Sort(self):
368          self.SortChildren(self.GetRootItem())          self.SortChildren(self.GetRootItem())
369    
370        def GetSelectedHierarchy(self):
371            id = self.GetSelection()
372    
373            if not id.IsOk():
374                return (None, None)
375    
376            layer = self.GetPyData(id)
377            group = None
378    
379            if isinstance(layer, ClassGroup):
380                id = self.GetItemParent(id)
381                assert id.IsOk()
382                group = layer
383                layer = self.GetPyData(id)
384    
385            return (layer, group)
386    
387        def _OnMsgMapsChanged(self):
388            #print self.map is self.mainWindow.Map()
389            self.SetMap(self.mainWindow.Map())
390            
391      def _OnSelChanged(self, event):      def _OnSelChanged(self, event):
392          self.parent.DoOnSelChanged()          # If we change the selection from normalize_selection do nothing.
393            if self.changing_selection:
394                return
395    
396            self.normalize_selection()
397            self.__UpdateSelection()
398    
399        def normalize_selection(self):
400            """Select the layer containing currently selected item"""
401            # This is really a workaround for a bug in wx where deleting a
402            # subtree with DeleteChildren does not update the selection
403            # properly and can lead to segfaults later because the return
404            # value of GetSelection points to invalid data.
405            item = self.GetSelection()
406            while item.IsOk():
407                object = self.GetPyData(item)
408                if isinstance(object, BaseLayer):
409                    break
410                item = self.GetItemParent(item)
411            else:
412                # No layer was found in the chain of parents, so there's
413                # nothing we can do.
414                return
415    
416            self.changing_selection = 1
417            try:
418                self.SelectItem(item)
419            finally:
420                self.changing_selection = 0
421    
422    
423        def OnItemExpandCollapse(self, event):
424            if self.preventExpandCollapse:
425                event.Veto()
426                self.preventExpandCollapse = False
427    
428        def _OnRightClick(self, event):
429            """Select item and pop up a context menu"""
430    
431            # The pop up menu is related to the legend tree, so we have direct
432            # access on the tree items. The events issued by the menu are handled
433            # by the legend panel, since most of the handlers are already
434            # implemented there.
435    
436            # Update item selection to the right click
437            item = event.GetItem()
438            self.SelectItem(item)
439    
440            # Create the menu
441            menu = wxMenu("", 0)
442    
443            # The "Visible" item is a special ...
444            menuitem = wxMenuItem(menu, ID_POPUP_VISIBLE, _("Visible"),
445                                    "", wxITEM_CHECK)
446            menu.AppendItem(menuitem)
447            layer, group = self.GetSelectedHierarchy()
448            menuitem.Check(layer.Visible())
449    
450            menu.AppendSeparator()
451            menu.Append(ID_POPUP_PROPS, _("Properties"))
452            menu.Append(ID_POPUP_PROJ, _("Projection"))
453            menu.AppendSeparator()
454            menu.Append(ID_POPUP_TOP, _("Top"))
455            menu.Append(ID_POPUP_UP, _("Up"))
456            menu.Append(ID_POPUP_DOWN, _("Down"))
457            menu.Append(ID_POPUP_BOTTOM, _("Bottom"))
458    
459            # Display the menu
460            pos = event.GetPoint()
461            shift = self.ClientToScreen((0,0))
462            self.PopupMenu(menu, pos)
463    
464      def _OnItemActivated(self, event):      def _OnItemActivated(self, event):
465          self.DoOnClassify()          # The following looks strange but is need under Windows to
466            # raise the Properties on double-click: The tree control
467            # always gets an Expanded / Collapsed event after the ItemActivated
468            # on double click, which raises the main window again. We add a second
469            # ItemActivated event to the queue, which simply raises the already
470            # displayed window.
471            if self.raiseProperties:
472                self.parent.DoOnProperties()
473                self.raiseProperties = False
474            else:
475                self.raiseProperties = True
476                self.preventExpandCollapse = True
477                self.parent.DoOnProperties()
478                self.AddPendingEvent(event)
479    
480      def _OnMsgLayerChanged(self, layer):      def _OnMsgLayerChanged(self, layer):
481          assert(isinstance(layer, Layer))          assert isinstance(layer, BaseLayer)
482    
483          id = self.layer2id[layer]          id = self.find_layer(layer)
484            assert id is not None
485    
486          self.__FillTreeLayer(id)          self.__FillTreeLayer(id)
487            self.__UpdateSelection()
488    
489      def _OnMsgMapStackingChanged(self, *args):      def _OnMsgMapStackingChanged(self, *args):
490          self.Sort()          self.Sort()
# Line 290  class LegendTree(wxTreeCtrl): Line 492  class LegendTree(wxTreeCtrl):
492    
493          if id.IsOk():          if id.IsOk():
494              self.EnsureVisible(id)              self.EnsureVisible(id)
495            self.__UpdateSelection()
496    
497      def _OnMsgMapLayersAddedRemoved(self, map):      def _OnMsgMapLayersAdded(self, map):
498          assert(id(map) == id(self.map))          assert map is self.map
499    
500          self.__FillTree(self.map)          # Build a dict with all layers known by the the tree as keys
501            layers = {}
502            root = self.GetRootItem()
503            id, cookie = self.GetFirstChild(root, 0)
504            while id.IsOk():
505                layers[self.GetPyData(id)] = 1
506                id, cookie = self.GetNextChild(root, cookie)
507    
508      def __FillTree(self, map):          # Add layers in the map but not in the dict
509            i = 0
510            for l in map.Layers():
511                if not l in layers:
512                    self.__AddLayer(i, l)
513    
514          assert(isinstance(map, Map))          self.__UpdateSelection()
515    
516          self.Freeze()      def _OnMsgMapLayersRemoved(self, map):
517            assert map is self.map
518    
519          self.__DeleteAllItems()          layers = map.Layers()
520    
521          if map.HasLayers():          root = self.GetRootItem()
522            id, cookie = self.GetFirstChild(root, 0)
523            while id.IsOk():
524                if self.GetPyData(id) not in layers:
525                    self.__RemoveLayer(id)
526                id, cookie = self.GetNextChild(root, cookie)
527    
             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)  
528    
529              root = self.AddRoot("")          self.__UpdateSelection()
530    
531              for l in map.Layers():      def _OnMsgLayerVisibilityChanged(self, layer):
532                  id = self.PrependItem(root, l.Title())          assert isinstance(layer, BaseLayer)
                 l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)  
                 self.SetPyData(id, l)  
                 font = self.GetItemFont(id)  
                 if not l.Visible():  
                     font.SetStyle(wxITALIC)  
                     self.SetItemFont(id, font)  
533    
534                  self.layer2id[l] = id          self.__ShowHideLayer(layer)
535            self.__UpdateSelection()
536    
537                  self.__FillTreeLayer(id)      def _OnMsgLayerTitleChanged(self, layer):
538                  self.Expand(id)  
539            id = self.find_layer(layer)
540            if id.IsOk():
541                self.SetItemText(id, layer.Title())
542            self.__UpdateSelection()
543    
544        def __UpdateSelection(self):
545            layer, group = self.GetSelectedHierarchy()
546            self.parent.DoOnSelChanged(layer, group)
547            
548        def __FillTree(self, map):
549    
550            self.Freeze()
551    
552            self.DeleteAllItems()
553    
554            if map.HasLayers():
555                root = self.GetRootItem()
556                for l in map.Layers():
557                    self.__AddLayer(0, l)
558    
559          self.Thaw()          self.Thaw()
560    
# Line 345  class LegendTree(wxTreeCtrl): Line 565  class LegendTree(wxTreeCtrl):
565    
566          self.DeleteChildren(pid)          self.DeleteChildren(pid)
567    
568          clazz = layer.GetClassification()          if layer.HasClassification():
569    
570          shapeType = layer.ShapeType()              clazz = layer.GetClassification()
571    
572          for g in clazz:              shapeType = layer.ShapeType()
             id = self.AppendItem(pid, g.GetDisplayText())  
             self.SetPyData(id, g)  
573    
574              bmp = self.__BuildGroupImage(g, shapeType)              show = layer.Visible()
575                for g in clazz:
576                    if g.IsVisible():
577                        id = self.AppendItem(pid, g.GetDisplayText())
578                        self.SetPyData(id, g)
579                        self.__SetVisibilityStyle(show, id)
580    
581                        bmp = self.__BuildGroupImage(g, shapeType)
582    
583                        if bmp is None:
584                            self.SetItemImage(id, -1)
585                            self.SetItemSelectedImage(id, -1)
586                        else:
587                            if self.availImgListIndices:
588                                i = self.availImgListIndices.pop(0)
589                                self.image_list.Replace(i, bmp)
590                            else:
591                                i = self.image_list.Add(bmp)
592    
593              if bmp is None:                          self.SetItemImage(id, i)
594                  self.SetItemImage(id, self.emptyImageIndex)                          self.SetItemSelectedImage(id, i)
             else:  
                 i = self.image_list.Add(bmp)  
                 self.SetItemImage(id, i)  
   
             #self.layer2id[g] = id  
595    
596          self.Thaw()          self.Thaw()
597    
598      def __BuildGroupImage(self, group, shapeType):      def __BuildGroupImage(self, group, shapeType):
         assert(isinstance(group, ClassGroup))  
599    
600          bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)          bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
601          #brush = wxBrush(Color2wxColour(item[1]), wxSOLID)          #brush = wxBrush(Color2wxColour(item[1]), wxSOLID)
# Line 378  class LegendTree(wxTreeCtrl): Line 607  class LegendTree(wxTreeCtrl):
607    
608          return bmp          return bmp
609    
610      def __DeleteAllItems(self):      def DeleteAllItems(self):
         self.DeleteAllItems()  
         self.layer2id = {}  
611    
612            pid = self.GetRootItem()
613    
614      def __ShowHideLayer(self, show):          id, cookie = self.GetFirstChild(pid, 123)
615          id = self.GetSelection()          while id.IsOk():
616          assert(id.IsOk())              self.__RemoveLayer(id)
617                id, cookie = self.GetNextChild(pid, cookie)
618    
619            wxTreeCtrl.DeleteAllItems(self)
620    
621        def __AddLayer(self, before, l):
622            root = self.GetRootItem()
623            id = self.InsertItemBefore(root, before,
624                                l.Title(),
625                                self.mapImageIndex,
626                                self.mapImageIndex)
627    
628            self.SetPyData(id, l)
629            self.__SetVisibilityStyle(l.Visible(), id)
630    
631            self.__FillTreeLayer(id)
632            self.Expand(id)
633    
634            l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged)
635            l.Subscribe(LAYER_VISIBILITY_CHANGED,
636                        self._OnMsgLayerVisibilityChanged)
637            l.Subscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
638    
639        def __RemoveLayer(self, id):
640            self.DeleteChildren(id)
641    
642            layer = self.GetPyData(id)
643            layer.Unsubscribe(LAYER_CHANGED,
644                              self._OnMsgLayerChanged)
645            layer.Unsubscribe(LAYER_VISIBILITY_CHANGED,
646                              self._OnMsgLayerVisibilityChanged)
647            layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged)
648    
649            self.Delete(id)
650    
651        def DeleteChildren(self, pid):
652            id, cookie = self.GetFirstChild(pid, 123)
653            while id.IsOk():
654                self.availImgListIndices.append(self.GetItemImage(id))
655                id, cookie = self.GetNextChild(pid, cookie)
656            wxTreeCtrl.DeleteChildren(self, pid)
657    
658        def GetRootItem(self):
659            root = wxTreeCtrl.GetRootItem(self)
660    
661            if not root.IsOk():
662                self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0)
663    
664                bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H)
665                dc = wxMemoryDC()
666                dc.SelectObject(bmp)
667                dc.SetBrush(wxBLACK_BRUSH)
668                dc.Clear()
669                dc.SelectObject(wxNullBitmap)
670    
671                self.emptyImageIndex = \
672                    self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
673    
674                bmp = resource.GetBitmapResource("legend_icon_layer",
675                                                  wxBITMAP_TYPE_XPM)
676                self.mapImageIndex = \
677                    self.image_list.Add(bmp)
678    
679                self.AssignImageList(self.image_list)
680                self.availImgListIndices = []
681    
682                root = self.AddRoot("")
683    
684            return root
685    
686        def __SetVisibilityStyle(self, visible, id):
687            font = self.GetItemFont(id)
688    
689            if visible:
690                font.SetStyle(wxNORMAL)
691                color = wxBLACK
692            else:
693                #font.SetStyle(wxITALIC)
694                font.SetStyle(wxNORMAL)
695                color = wxLIGHT_GREY
696    
697            self.SetItemTextColour(id, color)
698            self.SetItemFont(id, font)
699                    
700          item = self.GetPyData(id)      def __ShowHideLayer(self, layer):
701          if isinstance(item, ClassGroup):          parent = self.find_layer(layer)
702              id = self.GetItemParent(id)          assert parent.IsOk()
             assert(id.IsOk())  
             item = self.GetPyData(id)  
703    
704            visible = layer.Visible()
705    
706          if show != item.Visible():          self.__SetVisibilityStyle(visible, parent)
707    
708            id, cookie = self.GetFirstChild(parent, 123)
709    
710            while id.IsOk():
711                self.__SetVisibilityStyle(visible, id)
712                id, cookie = self.GetNextChild(parent, cookie)
713                
714    class ScaleBarBitmap(wxBoxSizer):
715    
716        def __init__(self, parent, map, mainWindow):
717            # While the width is fixed, get the height _now_.
718            dc = wxMemoryDC()
719            textwidth, textheight = dc.GetTextExtent("%d"%0)
720            self.width = 210
721            self.height = textheight + 3*2 + 8
722    
723            wxBoxSizer.__init__(self, wxVERTICAL)
724            bmp=wxEmptyBitmap(self.width, self.height)
725            self.scalebarBitmap = wxStaticBitmap(parent, -1, bmp)
726            self.Add(self.scalebarBitmap, 0, wxALIGN_CENTER|wxLEFT|wxTOP|wxRIGHT, 1)
727    
728            self.mainWindow = mainWindow
729            self.parent = parent
730            self.canvas = None
731            self.SetCanvas(self.mainWindow.canvas)
732    
733        def SetCanvas(self, canvas):
734            sub_list = [(SCALE_CHANGED, self._OnMsgScaleChanged)]
735    
736            if self.canvas is not None:
737                for msg, func in sub_list: self.canvas.Unsubscribe(msg, func)
738            
739            self.canvas = canvas
740            self.scalebar = ScaleBar(canvas.map)
741    
742            if self.canvas is not None:
743                for msg, func in sub_list: self.canvas.Subscribe(msg, func)
744                self.__SetScale(self.canvas.scale)
745    
746        def _OnMsgScaleChanged(self, scale):
747            self.__SetScale(scale)
748    
749        def __SetScale(self, scale):
750            bmp = wxEmptyBitmap(self.width, self.height)
751            dc = wxMemoryDC()
752            dc.SelectObject(bmp)
753            dc.Clear()
754    
755              item.SetVisible(show)          if self.canvas.map is not None \
756                and self.canvas.map.projection is not None:
757    
758              font = self.GetItemFont(id)              # if we are using a projection with geographics coordinates
759              if show:              # we need to change the scale value based on where we are
760                  font.SetStyle(wxNORMAL)              # on the globe.
761                  self.SetItemFont(id, font)              if self.canvas.map.projection.GetProjectedUnits() \
762              else:                  == PROJ_UNITS_DEGREES:
763                  font.SetStyle(wxITALIC)  
764                  self.SetItemFont(id, font)                  width, height = self.canvas.GetSizeTuple()
765                    long, lat = self.canvas.win_to_proj(width/2, height/2)
766    
767                    # slightly inaccurate, but if we are looking at
768                    # the north/south pole we could end up dividing by zero
769                    #
770                    # it shouldn't matter for our purposes that we ignore
771                    # the original sign of lat.
772                    if fabs(lat) > 89.9: lat = 89.9
773    
774                    #
775                    # one degree is about 111,133m at the equator
776                    # we need to adjust that for latitude as
777                    # we move north/south. use the center of the map
778                    # as the point to scale the length to.
779                    #
780                    scale = scale / (111133.0 * fabs(cos(lat * pi/180)))
781    
782                self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple())
783    
784            self.scalebarBitmap.SetBitmap(bmp)
785    
Legend:
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changed lines
  Added in v.1837
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