/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 1219 by bh, Mon Jun 16 17:42:54 2003 UTC revision 1271 by jonathan, Fri Jun 20 16:43:04 2003 UTC
# Line 19  import os.path Line 19  import os.path
19    
20  from math import hypot  from math import hypot
21    
22  from wxPython.wx import wxWindow,\  from wxPython.wx import wxWindow, wxYield,\
23       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\
24       EVT_PAINT, EVT_LEFT_DOWN, EVT_LEFT_UP, EVT_MOTION, EVT_LEAVE_WINDOW, \       EVT_PAINT, EVT_LEFT_DOWN, EVT_LEFT_UP, EVT_MOTION, EVT_LEAVE_WINDOW, \
25       wxBITMAP_TYPE_XPM, wxBeginBusyCursor, wxEndBusyCursor, wxCursor, \       wxBITMAP_TYPE_XPM, wxBeginBusyCursor, wxEndBusyCursor, wxCursor, \
# Line 35  from wxPython import wx Line 35  from wxPython import wx
35  from wxproj import point_in_polygon_shape, shape_centroid  from wxproj import point_in_polygon_shape, shape_centroid
36    
37  from Thuban.Model.messages import MAP_PROJECTION_CHANGED, \  from Thuban.Model.messages import MAP_PROJECTION_CHANGED, \
38         LAYER_PROJECTION_CHANGED, \
39       MAP_LAYERS_CHANGED, LAYER_CHANGED, LAYER_VISIBILITY_CHANGED       MAP_LAYERS_CHANGED, LAYER_CHANGED, LAYER_VISIBILITY_CHANGED
40  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
41       SHAPETYPE_POINT       SHAPETYPE_POINT
# Line 273  class MapPrintout(wx.wxPrintout): Line 274  class MapPrintout(wx.wxPrintout):
274                             self.selected_layer, self.selected_shapes)                             self.selected_layer, self.selected_shapes)
275          return True          return True
276    
   
277  class MapCanvas(wxWindow, Publisher):  class MapCanvas(wxWindow, Publisher):
278    
279      """A widget that displays a map and offers some interaction"""      """A widget that displays a map and offers some interaction"""
# Line 302  class MapCanvas(wxWindow, Publisher): Line 302  class MapCanvas(wxWindow, Publisher):
302          # the map displayed in this canvas. Set with SetMap()          # the map displayed in this canvas. Set with SetMap()
303          self.map = None          self.map = None
304    
305            # current map projection. should only differ from map.projection
306            # when the map's projection is changing and we need access to the
307            # old projection.
308            self.current_map_proj = None
309    
310          # scale and offset describe the transformation from projected          # scale and offset describe the transformation from projected
311          # coordinates to window coordinates.          # coordinates to window coordinates.
312          self.scale = 1.0          self.scale = 1.0
# Line 378  class MapCanvas(wxWindow, Publisher): Line 383  class MapCanvas(wxWindow, Publisher):
383          clear = self.map is None or not self.map.HasLayers()          clear = self.map is None or not self.map.HasLayers()
384    
385          wxBeginBusyCursor()          wxBeginBusyCursor()
386            wxYield()
387    
388          try:          try:
389              if not clear:              if not clear:
390                  self.do_redraw()                  self.do_redraw()
# Line 502  class MapCanvas(wxWindow, Publisher): Line 509  class MapCanvas(wxWindow, Publisher):
509              for channel in redraw_channels:              for channel in redraw_channels:
510                  self.map.Unsubscribe(channel, self.full_redraw)                  self.map.Unsubscribe(channel, self.full_redraw)
511              self.map.Unsubscribe(MAP_PROJECTION_CHANGED,              self.map.Unsubscribe(MAP_PROJECTION_CHANGED,
512                                   self.projection_changed)                                   self.map_projection_changed)
513                self.map.Unsubscribe(LAYER_PROJECTION_CHANGED,
514                                     self.layer_projection_changed)
515          self.map = map          self.map = map
516            self.current_map_proj = self.map.GetProjection()
517          self.selection.ClearSelection()          self.selection.ClearSelection()
518          if self.map is not None:          if self.map is not None:
519              for channel in redraw_channels:              for channel in redraw_channels:
520                  self.map.Subscribe(channel, self.full_redraw)                  self.map.Subscribe(channel, self.full_redraw)
521              self.map.Subscribe(MAP_PROJECTION_CHANGED, self.projection_changed)              self.map.Subscribe(MAP_PROJECTION_CHANGED, self.map_projection_changed)
522                self.map.Subscribe(LAYER_PROJECTION_CHANGED, self.layer_projection_changed)
523          self.FitMapToWindow()          self.FitMapToWindow()
524          # force a redraw. If map is not empty, it's already been called          # force a redraw. If map is not empty, it's already been called
525          # by FitMapToWindow but if map is empty it hasn't been called          # by FitMapToWindow but if map is empty it hasn't been called
# Line 526  class MapCanvas(wxWindow, Publisher): Line 537  class MapCanvas(wxWindow, Publisher):
537          self.bitmap = None          self.bitmap = None
538          self.redraw()          self.redraw()
539    
540      def projection_changed(self, *args):      def map_projection_changed(self, *args):
541          self.FitMapToWindow()  
542            proj = self.current_map_proj
543            self.current_map_proj = self.map.GetProjection()
544    
545            bbox = None
546    
547            if proj is not None and self.current_map_proj is not None:
548                width, height = self.GetSizeTuple()
549                llx, lly = self.win_to_proj(0, height)
550                urx, ury = self.win_to_proj(width, 0)
551                bbox = proj.Inverse(llx, lly) + proj.Inverse(urx, ury)
552                bbox = self.current_map_proj.ForwardBBox(bbox)
553    
554            if bbox is not None:
555                self.FitRectToWindow(bbox)
556            else:
557                self.FitMapToWindow()
558    
559            self.full_redraw()
560    
561        def layer_projection_changed(self, *args):
562          self.full_redraw()          self.full_redraw()
563    
564      def set_view_transform(self, scale, offset):      def set_view_transform(self, scale, offset):
# Line 623  class MapCanvas(wxWindow, Publisher): Line 654  class MapCanvas(wxWindow, Publisher):
654          Set the scale so that the map fits exactly into the window and          Set the scale so that the map fits exactly into the window and
655          center it in the window.          center it in the window.
656          """          """
657          bbox = self.map.ProjectedBoundingBox()          if self.map is not None:
658          if bbox is not None:              bbox = self.map.ProjectedBoundingBox()
659              self.FitRectToWindow(bbox)              if bbox is not None:
660                    self.FitRectToWindow(bbox)
661    
662      def FitLayerToWindow(self, layer):      def FitLayerToWindow(self, layer):
663          """Fit the given layer to the window.          """Fit the given layer to the window.
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