/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 144 by bh, Tue May 7 14:54:02 2002 UTC revision 442 by jonathan, Thu Feb 27 15:55:25 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4    # Jonathan Coles <[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 wxPython.wx import wxPoint, wxColour, wxPen, wxBrush, wxFont, \  from wxPython.wx import wxPoint, wxPen, wxBrush, wxFont, \
12       wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \       wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
13       wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL       wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL
14    
15  from wxproj import draw_polygon_shape  from wxproj import draw_polygon_shape
16    
17    from Thuban import _
18    from Thuban.UI.common import *
19    
20  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
21       SHAPETYPE_POINT       SHAPETYPE_POINT
22  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \
23       ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE       ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE
24    
25    from Thuban.Model.classification import Classification
26    from Thuban.Model.color import Color
27    
28    
29  class MapRenderer:  class MapRenderer:
30    
# Line 63  class MapRenderer: Line 70  class MapRenderer:
70          scale = self.scale          scale = self.scale
71          offx, offy = self.offset          offx, offy = self.offset
72    
         fill = layer.fill  
         if fill is None:  
             brush = wxTRANSPARENT_BRUSH  
         else:  
             color = wxColour(fill.red * 255,  
                              fill.green * 255,  
                              fill.blue * 255)  
             brush = wxBrush(color, wxSOLID)  
         stroke = layer.stroke  
         stroke_width = layer.stroke_width  
         if stroke is None:  
             pen = wxTRANSPARENT_PEN  
         else:  
             color = wxColour(stroke.red * 255,  
                              stroke.green * 255,  
                              stroke.blue * 255)  
             pen = wxPen(color, stroke_width, wxSOLID)  
   
73          map_proj = self.map.projection          map_proj = self.map.projection
74          layer_proj = layer.projection          layer_proj = layer.projection
75    
76          shapetype = layer.ShapeType()          shapetype = layer.ShapeType()
77    
78          if shapetype == SHAPETYPE_POLYGON:          brush = wxTRANSPARENT_BRUSH
79              for i in self.layer_ids(layer):          pen   = wxTRANSPARENT_PEN
80    
81            old_prop = None
82            for i in self.layer_ids(layer):
83                value = None
84                lc = layer.GetClassification()
85                field = lc.field
86    
87                if field is not None:
88                    record = layer.table.read_record(i)
89                    if record is not None:
90                        value = record[field]
91    
92                #
93                # if the above statements fail 'value' should
94                # be null, at which point this call will
95                # at least retreive the NullData
96                #
97                prop = lc.GetProperties(value)
98    
99                # don't recreate new objects if they are the same as before
100                if prop != old_prop:
101                    old_prop = prop
102    
103                    if shapetype == SHAPETYPE_ARC:
104                        fill = Color.None
105                    else:
106                        fill = prop.GetFill()
107        
108                    if fill is Color.None:
109                        brush = wxTRANSPARENT_BRUSH
110                    else:
111                        color = Color2wxColour(fill)
112                        brush = wxBrush(color, wxSOLID)
113        
114                    stroke = prop.GetStroke()
115                    stroke_width = prop.GetStrokeWidth()
116                    if stroke is Color.None:
117                        pen = wxTRANSPARENT_PEN
118                    else:
119                        color = Color2wxColour(stroke)
120                        pen = wxPen(color, stroke_width, wxSOLID)
121        
122                if shapetype == SHAPETYPE_POINT:
123                    self.dc.SetBrush(brush)
124                    self.dc.SetPen(pen)
125                    self.draw_point_shape(layer, i)
126                else:
127                  self.draw_polygon_shape(layer, i, pen, brush)                  self.draw_polygon_shape(layer, i, pen, brush)
         elif shapetype == SHAPETYPE_ARC:  
             for i in self.layer_ids(layer):  
                 self.draw_polygon_shape(layer, i, pen, None)  
         else:  
             self.dc.SetBrush(brush)  
             self.dc.SetPen(pen)  
             if shapetype == SHAPETYPE_ARC:  
                 f = self.draw_arc_shape  
             elif shapetype == SHAPETYPE_POINT:  
                 f = self.draw_point_shape  
             for i in self.layer_ids(layer):  
                 f(layer, i)  
128    
129      def layer_ids(self, layer):      def layer_ids(self, layer):
130          """Return the shape ids of the given layer that have to be drawn.          """Return the shape ids of the given layer that have to be drawn.
# Line 197  class ScreenRenderer(MapRenderer): Line 221  class ScreenRenderer(MapRenderer):
221      def RenderMap(self, map, region, selected_layer, selected_shape):      def RenderMap(self, map, region, selected_layer, selected_shape):
222          """Render the map.          """Render the map.
223    
224          Only the given region (a wxRect in window coordinates) needs to          Only the given region (a tuple in window coordinates as returned
225          be redrawn. Highlight the shape with id selected_shape in the          by a wxrect's asTuple method) needs to be redrawn. Highlight the
226          selected_layer.          shape with id selected_shape in the selected_layer.
227          """          """
228          self.update_region = region          self.update_region = region
229          self.selected_layer = selected_layer          self.selected_layer = selected_layer
# Line 216  class ScreenRenderer(MapRenderer): Line 240  class ScreenRenderer(MapRenderer):
240              index = self.selected_shape              index = self.selected_shape
241              if shapetype == SHAPETYPE_POLYGON:              if shapetype == SHAPETYPE_POLYGON:
242                  self.draw_polygon_shape(layer, index, pen, brush)                  self.draw_polygon_shape(layer, index, pen, brush)
243                elif shapetype == SHAPETYPE_ARC:
244                    self.draw_polygon_shape(layer, index, pen, None)
245              else:              else:
246                  self.dc.SetBrush(brush)                  self.dc.SetBrush(brush)
247                  self.dc.SetPen(pen)                  self.dc.SetPen(pen)
248                  if shapetype == SHAPETYPE_ARC:                  if shapetype == SHAPETYPE_POINT:
249                      f = self.draw_arc_shape                      self.draw_point_shape(layer, index)
250                  elif shapetype == SHAPETYPE_POINT:                  else:
251                      f = self.draw_point_shape                      raise TypeError(_("Unhandled shape type %s") % shapetype)
                 f(layer, index)  
252    
253      def layer_ids(self, layer):      def layer_ids(self, layer):
254          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
# Line 246  class ScreenRenderer(MapRenderer): Line 271  class ScreenRenderer(MapRenderer):
271          offx, offy = self.offset          offx, offy = self.offset
272          xs = []          xs = []
273          ys = []          ys = []
274          x, y, width, height = self.update_region.asTuple()          x, y, width, height = self.update_region
275          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
276                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
277              px = (winx - offx) / scale              px = (winx - offx) / scale
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