/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 159 by bh, Wed May 8 13:46:15 2002 UTC revision 288 by bh, Thu Aug 29 13:31:43 2002 UTC
# Line 129  class ZoomInTool(RectTool): Line 129  class ZoomInTool(RectTool):
129              Tool.MouseUp(self, event)              Tool.MouseUp(self, event)
130              sx, sy = self.start              sx, sy = self.start
131              cx, cy = self.current              cx, cy = self.current
132              if sx == cx and sy == cy:              if sx == cx or sy == cy:
133                  # Just a mouse click. Simply zoom in by a factor of two                  # Just a mouse click or a degenerate rectangle. Simply
134                    # zoom in by a factor of two
135                    # FIXME: For a click this is the desired behavior but should we
136                    # really do this for degenrate rectagles as well or
137                    # should we ignore them?
138                  self.view.ZoomFactor(2, center = (cx, cy))                  self.view.ZoomFactor(2, center = (cx, cy))
139              else:              else:
140                  # A drag. Zoom in to the rectangle                  # A drag. Zoom in to the rectangle
# Line 140  class ZoomInTool(RectTool): Line 144  class ZoomInTool(RectTool):
144  class ZoomOutTool(RectTool):  class ZoomOutTool(RectTool):
145    
146      """The Zoom-Out Tool"""      """The Zoom-Out Tool"""
147        
148      def Name(self):      def Name(self):
149          return "ZoomOutTool"          return "ZoomOutTool"
150    
# Line 149  class ZoomOutTool(RectTool): Line 153  class ZoomOutTool(RectTool):
153              Tool.MouseUp(self, event)              Tool.MouseUp(self, event)
154              sx, sy = self.start              sx, sy = self.start
155              cx, cy = self.current              cx, cy = self.current
156              if sx == cx and sy == cy:              if sx == cx or sy == cy:
157                  # Just a mouse click. Simply zoom out by a factor of two                  # Just a mouse click or a degenerate rectangle. Simply
158                  self.view.ZoomFactor(0.5, center = (cy, cy))                  # zoom out by a factor of two.
159                    # FIXME: For a click this is the desired behavior but should we
160                    # really do this for degenrate rectagles as well or
161                    # should we ignore them?
162                    self.view.ZoomFactor(0.5, center = (cx, cy))
163              else:              else:
164                  # A drag. Zoom out to the rectangle                  # A drag. Zoom out to the rectangle
165                  self.view.ZoomOutToRect((min(sx, cx), min(sy, cy),                  self.view.ZoomOutToRect((min(sx, cx), min(sy, cy),
# Line 184  class PanTool(Tool): Line 192  class PanTool(Tool):
192              sx, sy = self.start              sx, sy = self.start
193              cx, cy = self.current              cx, cy = self.current
194              self.view.Translate(cx - sx, cy - sy)              self.view.Translate(cx - sx, cy - sy)
195            
196  class IdentifyTool(Tool):  class IdentifyTool(Tool):
197    
198      """The "Identify" Tool"""      """The "Identify" Tool"""
199        
200      def Name(self):      def Name(self):
201          return "IdentifyTool"          return "IdentifyTool"
202    
# Line 242  class MapPrintout(wx.wxPrintout): Line 250  class MapPrintout(wx.wxPrintout):
250          renderer = PrinterRender(dc, scale, (offx, offy), resolution = resx)          renderer = PrinterRender(dc, scale, (offx, offy), resolution = resx)
251          renderer.RenderMap(self.map)          renderer.RenderMap(self.map)
252          return wx.true          return wx.true
253            
254    
255  class MapCanvas(wxWindow, Publisher):  class MapCanvas(wxWindow, Publisher):
256    
# Line 286  class MapCanvas(wxWindow, Publisher): Line 294  class MapCanvas(wxWindow, Publisher):
294          self.interactor = interactor          self.interactor = interactor
295          self.interactor.Subscribe(SELECTED_SHAPE, self.shape_selected)          self.interactor.Subscribe(SELECTED_SHAPE, self.shape_selected)
296    
297            # keep track of which layers/shapes are selected to make sure we
298            # only redraw when necessary
299            self.last_selected_layer = None
300            self.last_selected_shape = None
301    
302          # subscribe the WX events we're interested in          # subscribe the WX events we're interested in
303          EVT_PAINT(self, self.OnPaint)          EVT_PAINT(self, self.OnPaint)
304          EVT_LEFT_DOWN(self, self.OnLeftDown)          EVT_LEFT_DOWN(self, self.OnLeftDown)
# Line 309  class MapCanvas(wxWindow, Publisher): Line 322  class MapCanvas(wxWindow, Publisher):
322          else:          else:
323              # 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
324              # the screen.              # the screen.
325                
326              # XXX it's probably possible to get rid of this. The              # XXX it's probably possible to get rid of this. The
327              # background color of the window is already white and the              # background color of the window is already white and the
328              # only thing we may have to do is to call self.Refresh()              # only thing we may have to do is to call self.Refresh()
329              # with a true argument in the right places.              # with a true argument in the right places.
330              dc.BeginDrawing()              dc.BeginDrawing()
331              dc.Clear()                          dc.Clear()
332              dc.EndDrawing()              dc.EndDrawing()
333    
334              # clear the region              # clear the region
# Line 378  class MapCanvas(wxWindow, Publisher): Line 391  class MapCanvas(wxWindow, Publisher):
391          printout = MapPrintout(self.map)          printout = MapPrintout(self.map)
392          printer.Print(self, printout, wx.true)          printer.Print(self, printout, wx.true)
393          printout.Destroy()          printout.Destroy()
394            
395      def SetMap(self, map):      def SetMap(self, map):
396          redraw_channels = (LAYERS_CHANGED, LAYER_LEGEND_CHANGED,          redraw_channels = (LAYERS_CHANGED, LAYER_LEGEND_CHANGED,
397                             LAYER_VISIBILITY_CHANGED)                             LAYER_VISIBILITY_CHANGED)
# Line 547  class MapCanvas(wxWindow, Publisher): Line 560  class MapCanvas(wxWindow, Publisher):
560              self.tool.MouseDown(event)              self.tool.MouseDown(event)
561              self.tool.Show(self.drag_dc)              self.tool.Show(self.drag_dc)
562              self.dragging = 1              self.dragging = 1
563            
564      def OnLeftUp(self, event):      def OnLeftUp(self, event):
         self.ReleaseMouse()  
565          self.set_current_position(event)          self.set_current_position(event)
566          if self.dragging:          if self.dragging:
567                self.ReleaseMouse()
568              self.tool.Hide(self.drag_dc)              self.tool.Hide(self.drag_dc)
569              self.tool.MouseUp(event)              self.tool.MouseUp(event)
570              self.drag_dc = None              self.drag_dc = None
# Line 582  class MapCanvas(wxWindow, Publisher): Line 595  class MapCanvas(wxWindow, Publisher):
595          self.full_redraw()          self.full_redraw()
596    
597      def shape_selected(self, layer, shape):      def shape_selected(self, layer, shape):
598          self.full_redraw()          """Redraw the map.
599    
600            Receiver for the SELECTED_SHAPE messages. Try to redraw only
601            when necessary.
602            """
603            # A redraw is necessary when the display has to change, which
604            # means that either the status changes from having no selection
605            # to having a selection shape or vice versa, or when the fact
606            # whether there is a selection at all doesn't change, when the
607            # shape which is selected has changed (which means that layer or
608            # shapeid changes).
609            if ((shape is not None or self.last_selected_shape is not None)
610                and (shape != self.last_selected_shape
611                     or layer != self.last_selected_layer)):
612                self.full_redraw()
613    
614            # remember the selection so we can compare when it changes again.
615            self.last_selected_layer = layer
616            self.last_selected_shape = shape
617    
618      def unprojected_rect_around_point(self, x, y):      def unprojected_rect_around_point(self, x, y):
619          """return a rect a few pixels around (x, y) in unprojected corrdinates          """return a rect a few pixels around (x, y) in unprojected corrdinates
# Line 606  class MapCanvas(wxWindow, Publisher): Line 637  class MapCanvas(wxWindow, Publisher):
637              ys.append(py)              ys.append(py)
638          return (min(xs), min(ys), max(xs), max(ys))          return (min(xs), min(ys), max(xs), max(ys))
639    
640      def find_shape_at(self, px, py, select_labels = 0, selected_layer = 1):      def find_shape_at(self, px, py, select_labels = 0, searched_layer = None):
641          """Determine the shape at point px, py in window coords          """Determine the shape at point px, py in window coords
642    
643          Return the shape and the corresponding layer as a tuple (layer,          Return the shape and the corresponding layer as a tuple (layer,
# Line 616  class MapCanvas(wxWindow, Publisher): Line 647  class MapCanvas(wxWindow, Publisher):
647          search through the labels. If a label is found return it's index          search through the labels. If a label is found return it's index
648          as the shape and None as the layer.          as the shape and None as the layer.
649    
650          If the optional parameter selected_layer is true (default), only          If the optional parameter searched_layer is given (or not None
651          search in the currently selected layer.          which it defaults to), only search in that layer.
652          """          """
653          map_proj = self.map.projection          map_proj = self.map.projection
654          if map_proj is not None:          if map_proj is not None:
# Line 632  class MapCanvas(wxWindow, Publisher): Line 663  class MapCanvas(wxWindow, Publisher):
663    
664          if select_labels:          if select_labels:
665              labels = self.map.LabelLayer().Labels()              labels = self.map.LabelLayer().Labels()
666                
667              if labels:              if labels:
668                  dc = wxClientDC(self)                  dc = wxClientDC(self)
669                  font = wxFont(10, wx.wxSWISS, wx.wxNORMAL, wx.wxNORMAL)                  font = wxFont(10, wx.wxSWISS, wx.wxNORMAL, wx.wxNORMAL)
# Line 664  class MapCanvas(wxWindow, Publisher): Line 695  class MapCanvas(wxWindow, Publisher):
695                      if x <= px < x + width and y <= py <= y + height:                      if x <= px < x + width and y <= py <= y + height:
696                          return None, i                          return None, i
697    
698          if selected_layer:          if searched_layer:
699              layer = self.interactor.SelectedLayer()              layers = [searched_layer]
             if layer is not None:  
                 layers = [layer]  
             else:  
                 # no layer selected. Use an empty list to effectively  
                 # ignore all layers.  
                 layers = []  
700          else:          else:
701              layers = self.map.Layers()              layers = self.map.Layers()
702    
# Line 684  class MapCanvas(wxWindow, Publisher): Line 709  class MapCanvas(wxWindow, Publisher):
709    
710              filled = layer.fill is not None              filled = layer.fill is not None
711              stroked = layer.stroke is not None              stroked = layer.stroke is not None
712                    
713              layer_proj = layer.projection              layer_proj = layer.projection
714              if layer_proj is not None:              if layer_proj is not None:
715                  inverse = layer_proj.Inverse                  inverse = layer_proj.Inverse
716              else:              else:
717                  inverse = None                  inverse = None
718                    
719              shapetype = layer.ShapeType()              shapetype = layer.ShapeType()
720    
721              select_shape = -1              select_shape = -1
# Line 737  class MapCanvas(wxWindow, Publisher): Line 762  class MapCanvas(wxWindow, Publisher):
762                  return layer, select_shape                  return layer, select_shape
763          return None, None          return None, None
764    
765      def SelectShapeAt(self, x, y):      def SelectShapeAt(self, x, y, layer = None):
766          layer, shape = self.find_shape_at(x, y, selected_layer = 0)          """\
767            Select and return the shape and its layer at window position (x, y)
768    
769            If layer is given, only search in that layer. If no layer is
770            given, search through all layers.
771    
772            Return a tuple (layer, shapeid). If no shape is found, return
773            (None, None).
774            """
775            layer, shape = result = self.find_shape_at(x, y, searched_layer=layer)
776          # If layer is None, then shape will also be None. We don't want          # If layer is None, then shape will also be None. We don't want
777          # to deselect the currently selected layer, so we simply select          # to deselect the currently selected layer, so we simply select
778          # the already selected layer again.          # the already selected layer again.
779          if layer is None:          if layer is None:
780              layer = self.interactor.SelectedLayer()              layer = self.interactor.SelectedLayer()
781          self.interactor.SelectLayerAndShape(layer, shape)          self.interactor.SelectLayerAndShape(layer, shape)
782            return result
783    
784      def LabelShapeAt(self, x, y):      def LabelShapeAt(self, x, y):
785          ox = x; oy = y          ox = x; oy = y
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