/[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 1285 by jonathan, Mon Jun 23 10:30:53 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, \
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, wxCursor, wxImageFromBitmap, wxPlatform, \
26       wxImageFromBitmap, wxPlatform       wxBeginBusyCursor, wxEndBusyCursor
27    
28    
29  # Export related stuff  # Export related stuff
30  if wxPlatform == '__WXMSW__':  if wxPlatform == '__WXMSW__':
# Line 35  from wxPython import wx Line 36  from wxPython import wx
36  from wxproj import point_in_polygon_shape, shape_centroid  from wxproj import point_in_polygon_shape, shape_centroid
37    
38  from Thuban.Model.messages import MAP_PROJECTION_CHANGED, \  from Thuban.Model.messages import MAP_PROJECTION_CHANGED, \
39         LAYER_PROJECTION_CHANGED, \
40       MAP_LAYERS_CHANGED, LAYER_CHANGED, LAYER_VISIBILITY_CHANGED       MAP_LAYERS_CHANGED, LAYER_CHANGED, LAYER_VISIBILITY_CHANGED
41  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
42       SHAPETYPE_POINT       SHAPETYPE_POINT
# Line 273  class MapPrintout(wx.wxPrintout): Line 275  class MapPrintout(wx.wxPrintout):
275                             self.selected_layer, self.selected_shapes)                             self.selected_layer, self.selected_shapes)
276          return True          return True
277    
   
278  class MapCanvas(wxWindow, Publisher):  class MapCanvas(wxWindow, Publisher):
279    
280      """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 303  class MapCanvas(wxWindow, Publisher):
303          # the map displayed in this canvas. Set with SetMap()          # the map displayed in this canvas. Set with SetMap()
304          self.map = None          self.map = None
305    
306            # current map projection. should only differ from map.projection
307            # when the map's projection is changing and we need access to the
308            # old projection.
309            self.current_map_proj = None
310    
311          # scale and offset describe the transformation from projected          # scale and offset describe the transformation from projected
312          # coordinates to window coordinates.          # coordinates to window coordinates.
313          self.scale = 1.0          self.scale = 1.0
# Line 375  class MapCanvas(wxWindow, Publisher): Line 381  class MapCanvas(wxWindow, Publisher):
381    
382      def OnPaint(self, event):      def OnPaint(self, event):
383          dc = wxPaintDC(self)          dc = wxPaintDC(self)
384    
385          clear = self.map is None or not self.map.HasLayers()          clear = self.map is None or not self.map.HasLayers()
386    
387          wxBeginBusyCursor()          wxBeginBusyCursor()
388          try:          try:
389              if not clear:              if not clear:
390                  self.do_redraw()                  self.do_redraw()
391                  try:              else:
                     pass  
                 except:  
                     print "Error during drawing:", sys.exc_info()[0]  
                     clear = True  
   
             if clear:  
392                  # If we've got no map or if the map is empty, simply clear                  # If we've got no map or if the map is empty, simply clear
393                  # the screen.                  # the screen.
394    
# Line 502  class MapCanvas(wxWindow, Publisher): Line 503  class MapCanvas(wxWindow, Publisher):
503              for channel in redraw_channels:              for channel in redraw_channels:
504                  self.map.Unsubscribe(channel, self.full_redraw)                  self.map.Unsubscribe(channel, self.full_redraw)
505              self.map.Unsubscribe(MAP_PROJECTION_CHANGED,              self.map.Unsubscribe(MAP_PROJECTION_CHANGED,
506                                   self.projection_changed)                                   self.map_projection_changed)
507                self.map.Unsubscribe(LAYER_PROJECTION_CHANGED,
508                                     self.layer_projection_changed)
509          self.map = map          self.map = map
510            self.current_map_proj = self.map.GetProjection()
511          self.selection.ClearSelection()          self.selection.ClearSelection()
512          if self.map is not None:          if self.map is not None:
513              for channel in redraw_channels:              for channel in redraw_channels:
514                  self.map.Subscribe(channel, self.full_redraw)                  self.map.Subscribe(channel, self.full_redraw)
515              self.map.Subscribe(MAP_PROJECTION_CHANGED, self.projection_changed)              self.map.Subscribe(MAP_PROJECTION_CHANGED, self.map_projection_changed)
516                self.map.Subscribe(LAYER_PROJECTION_CHANGED, self.layer_projection_changed)
517          self.FitMapToWindow()          self.FitMapToWindow()
518          # 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
519          # 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 531  class MapCanvas(wxWindow, Publisher):
531          self.bitmap = None          self.bitmap = None
532          self.redraw()          self.redraw()
533    
534      def projection_changed(self, *args):      def map_projection_changed(self, *args):
535          self.FitMapToWindow()  
536            proj = self.current_map_proj
537            self.current_map_proj = self.map.GetProjection()
538    
539            bbox = None
540    
541            if proj is not None and self.current_map_proj is not None:
542                width, height = self.GetSizeTuple()
543                llx, lly = self.win_to_proj(0, height)
544                urx, ury = self.win_to_proj(width, 0)
545                bbox = proj.Inverse(llx, lly) + proj.Inverse(urx, ury)
546                bbox = self.current_map_proj.ForwardBBox(bbox)
547    
548            if bbox is not None:
549                self.FitRectToWindow(bbox)
550            else:
551                self.FitMapToWindow()
552    
553            self.full_redraw()
554    
555        def layer_projection_changed(self, *args):
556          self.full_redraw()          self.full_redraw()
557    
558      def set_view_transform(self, scale, offset):      def set_view_transform(self, scale, offset):
# Line 623  class MapCanvas(wxWindow, Publisher): Line 648  class MapCanvas(wxWindow, Publisher):
648          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
649          center it in the window.          center it in the window.
650          """          """
651          bbox = self.map.ProjectedBoundingBox()          if self.map is not None:
652          if bbox is not None:              bbox = self.map.ProjectedBoundingBox()
653              self.FitRectToWindow(bbox)              if bbox is not None:
654                    self.FitRectToWindow(bbox)
655    
656      def FitLayerToWindow(self, layer):      def FitLayerToWindow(self, layer):
657          """Fit the given layer to the window.          """Fit the given layer to the window.
# Line 912  class MapCanvas(wxWindow, Publisher): Line 938  class MapCanvas(wxWindow, Publisher):
938              layer = layers[layer_index]              layer = layers[layer_index]
939    
940              # search only in visible layers              # search only in visible layers
941              if not layer.Visible():              if not layer.Visible() or not layer.HasShapes():
942                  continue                  continue
943    
944              filled = layer.GetClassification().GetDefaultFill() \              filled = layer.GetClassification().GetDefaultFill() \
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