/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 290 by bh, Thu Aug 29 14:11:28 2002 UTC revision 676 by jonathan, Tue Apr 15 19:20:40 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, draw_polygon_init
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    import time
29    
30    
31  class MapRenderer:  class MapRenderer:
32    
# Line 41  class MapRenderer: Line 50  class MapRenderer:
50                  the renderer's default.                  the renderer's default.
51          """          """
52          # resolution in pixel/inch          # resolution in pixel/inch
53    
54            assert scale > 0
55    
56          self.dc = dc          self.dc = dc
57          self.scale = scale          self.scale = scale
58          self.offset = offset          self.offset = offset
# Line 63  class MapRenderer: Line 75  class MapRenderer:
75          scale = self.scale          scale = self.scale
76          offx, offy = self.offset          offx, offy = self.offset
77    
         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)  
   
78          map_proj = self.map.projection          map_proj = self.map.projection
79          layer_proj = layer.projection          layer_proj = layer.projection
80    
81          shapetype = layer.ShapeType()          shapetype = layer.ShapeType()
82    
83          if shapetype == SHAPETYPE_POLYGON:          brush = wxTRANSPARENT_BRUSH
84              for i in self.layer_ids(layer):          pen   = wxTRANSPARENT_PEN
85    
86            old_prop = None
87            lc = layer.GetClassification()
88            field = lc.GetField()
89    
90            #print "drawing layer: ", layer.Title(),
91            #start = time.clock()
92            #count = 0
93    
94            if shapetype != SHAPETYPE_POINT:
95                offx, offy = self.offset        
96                draw_polygon_init(layer.shapefile.cobject(),
97                                  self.dc,
98                                  self.map.projection, layer.projection,
99                                  self.scale, -self.scale, offx, offy)
100    
101            for i in self.layer_ids(layer):
102                value = None
103    
104                if field is not None:
105                    try:
106                        record = layer.table.read_record(i)
107                        if record is not None:
108                            value = record[field]
109                    except:
110                        pass
111    
112                    #
113                    # if the above statements fail 'value' should
114                    # be null, at which point this call will
115                    # at least retreive the NullData
116                    #
117    
118                    group = lc.FindGroup(value)
119    
120                    #prop = lc.GetProperties(value)
121                else:
122                    group = lc.GetDefaultGroup()
123    
124    
125                if not group.IsVisible():
126                    continue
127    
128                prop = group.GetProperties()
129    
130                # don't recreate new objects if they are the same as before
131                if prop != old_prop:
132                    old_prop = prop
133    
134                    if shapetype == SHAPETYPE_ARC:
135                        fill = Color.Transparent
136                    else:
137                        fill = prop.GetFill()
138    
139        
140                    if fill is Color.Transparent:
141                        brush = wxTRANSPARENT_BRUSH
142                    else:
143                        color = Color2wxColour(fill)
144                        brush = wxBrush(color, wxSOLID)
145        
146                    stroke = prop.GetLineColor()
147                    stroke_width = prop.GetLineWidth()
148                    if stroke is Color.Transparent:
149                        pen = wxTRANSPARENT_PEN
150                    else:
151                        color = Color2wxColour(stroke)
152                        pen = wxPen(color, stroke_width, wxSOLID)
153    
154                    self.dc.SetBrush(brush)
155                    self.dc.SetPen(pen)
156        
157                if shapetype == SHAPETYPE_POINT:
158                    self.draw_point_shape(layer, i)
159                else:
160                  self.draw_polygon_shape(layer, i, pen, brush)                  self.draw_polygon_shape(layer, i, pen, brush)
161          elif shapetype == SHAPETYPE_ARC:  
162              for i in self.layer_ids(layer):              #count += 1
163                  self.draw_polygon_shape(layer, i, pen, None)  
164          else:          #end = time.clock()
165              self.dc.SetBrush(brush)          #print (end-start), "seconds -- ", count
166              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)  
167    
168      def layer_ids(self, layer):      def layer_ids(self, layer):
169          """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 111  class MapRenderer: Line 174  class MapRenderer:
174          return range(layer.NumShapes())          return range(layer.NumShapes())
175    
176      def draw_polygon_shape(self, layer, index, pen, brush):      def draw_polygon_shape(self, layer, index, pen, brush):
177          offx, offy = self.offset                  draw_polygon_shape(index, pen, brush)
         draw_polygon_shape(layer.shapefile.cobject(), index,  
                            self.dc, pen, brush,  
                            self.map.projection, layer.projection,  
                            self.scale, -self.scale, offx, offy)  
178    
179      def projected_points(self, layer, index):      def projected_points(self, layer, index):
180          proj = self.map.projection          proj = self.map.projection
# Line 146  class MapRenderer: Line 205  class MapRenderer:
205          self.dc.DrawLines(points)          self.dc.DrawLines(points)
206    
207      def draw_point_shape(self, layer, index):      def draw_point_shape(self, layer, index):
208          p = self.projected_points(layer, index)[0]          pp = self.projected_points(layer, index)
209    
210            if len(pp) == 0: return # ignore Null Shapes which have no points
211    
212            p = pp[0]
213          radius = self.resolution * 5          radius = self.resolution * 5
214          self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)          self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)
215    
# Line 194  class ScreenRenderer(MapRenderer): Line 257  class ScreenRenderer(MapRenderer):
257      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
258      honor_visibility = 1      honor_visibility = 1
259            
260      def RenderMap(self, map, region, selected_layer, selected_shape):      def RenderMap(self, map, region, selected_layer, selected_shapes):
261          """Render the map.          """Render the map.
262    
263          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
264          by a wxrect's asTuple method) needs to be redrawn. Highlight the          by a wxrect's asTuple method) needs to be redrawn. Highlight the
265          shape with id selected_shape in the selected_layer.          shapes given by the ids in selected_shapes in the
266            selected_layer.
267          """          """
268          self.update_region = region          self.update_region = region
269          self.selected_layer = selected_layer          self.selected_layer = selected_layer
270          self.selected_shape = selected_shape          self.selected_shapes = selected_shapes
271          self.render_map(map)          self.render_map(map)
272    
273      def draw_shape_layer(self, layer):      def draw_shape_layer(self, layer):
274          MapRenderer.draw_shape_layer(self, layer)          MapRenderer.draw_shape_layer(self, layer)
275          if layer is self.selected_layer and self.selected_shape is not None:          if layer is self.selected_layer and self.selected_shapes:
276              pen = wxPen(wxBLACK, 3, wxSOLID)              pen = wxPen(wxBLACK, 3, wxSOLID)
277              brush = wxBrush(wxBLACK, wxCROSS_HATCH)              brush = wxBrush(wxBLACK, wxCROSS_HATCH)
278                
279              shapetype = layer.ShapeType()              shapetype = layer.ShapeType()
             index = self.selected_shape  
280              if shapetype == SHAPETYPE_POLYGON:              if shapetype == SHAPETYPE_POLYGON:
281                  self.draw_polygon_shape(layer, index, pen, brush)                  func = self.draw_polygon_shape
282                    args = (pen, brush)
283              elif shapetype == SHAPETYPE_ARC:              elif shapetype == SHAPETYPE_ARC:
284                  self.draw_polygon_shape(layer, index, pen, None)                  func = self.draw_polygon_shape
285              else:                  args = (pen, None)
286                elif shapetype == SHAPETYPE_POINT:
287                  self.dc.SetBrush(brush)                  self.dc.SetBrush(brush)
288                  self.dc.SetPen(pen)                  self.dc.SetPen(pen)
289                  if shapetype == SHAPETYPE_POINT:                  func = self.draw_point_shape
290                      self.draw_point_shape(layer, index)                  args = ()
291                  else:              else:
292                      raise TypeError("Unhandled shape type %s" % shapetype)                  raise TypeError(_("Unhandled shape type %s") % shapetype)
293    
294                for index in self.selected_shapes:
295                    func(layer, index, *args)
296    
297      def layer_ids(self, layer):      def layer_ids(self, layer):
298          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
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