/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 374 by jan, Mon Jan 27 14:20:02 2003 UTC revision 686 by bh, Wed Apr 16 13:22:25 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, draw_polygon_init
16    
17  from Thuban import _  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 43  class MapRenderer: Line 48  class MapRenderer:
48                  the renderer's default.                  the renderer's default.
49          """          """
50          # resolution in pixel/inch          # resolution in pixel/inch
51    
52            assert scale > 0
53    
54          self.dc = dc          self.dc = dc
55          self.scale = scale          self.scale = scale
56          self.offset = offset          self.offset = offset
# Line 74  class MapRenderer: Line 82  class MapRenderer:
82          pen   = wxTRANSPARENT_PEN          pen   = wxTRANSPARENT_PEN
83    
84          old_prop = None          old_prop = None
85            lc = layer.GetClassification()
86            field = lc.GetField()
87    
88    
89            if shapetype != SHAPETYPE_POINT:
90                polygon_render_param = self.polygon_render_param(layer)
91    
92          for i in self.layer_ids(layer):          for i in self.layer_ids(layer):
93              value = None              value = None
             shape = layer.Shape(i)  
             field = layer.classification.field  
94    
95              if field is not None:              if field is not None:
96                  record = layer.table.read_record(i)                  try:
97                  if record is not None:                      record = layer.table.read_record(i)
98                      value = record[field]                      if record is not None:
99                            value = record[field]
100              #                  except:
101              # if the above statements fail 'value' should                      pass
102              # be null, at which point this call will  
103              # at least retreive the NullData                  #
104              #                  # if the above statements fail 'value' should
105              prop = layer.classification.getProperties(value)                  # be null, at which point this call will
106                    # at least retreive the NullData
107                    #
108    
109                    group = lc.FindGroup(value)
110    
111                    #prop = lc.GetProperties(value)
112                else:
113                    group = lc.GetDefaultGroup()
114    
115    
116                if not group.IsVisible():
117                    continue
118    
119                prop = group.GetProperties()
120    
121                # don't recreate new objects if they are the same as before
122              if prop != old_prop:              if prop != old_prop:
123                  old_prop = prop                  old_prop = prop
124    
125                  if shapetype == SHAPETYPE_ARC:                  if shapetype == SHAPETYPE_ARC:
126                      fill = None                      fill = Color.Transparent
127                  else:                  else:
128                      fill = prop['fill']                      fill = prop.GetFill()
129        
130                  if fill is None:  
131                    if fill is Color.Transparent:
132                      brush = wxTRANSPARENT_BRUSH                      brush = wxTRANSPARENT_BRUSH
133                  else:                  else:
134                      color = wxColour(fill.red * 255,                      color = Color2wxColour(fill)
                                      fill.green * 255,  
                                      fill.blue * 255)  
135                      brush = wxBrush(color, wxSOLID)                      brush = wxBrush(color, wxSOLID)
136        
137                  stroke = prop['stroke']                  stroke = prop.GetLineColor()
138                  stroke_width = prop['stroke_width']                  stroke_width = prop.GetLineWidth()
139                  if stroke is None:                  if stroke is Color.Transparent:
140                      pen = wxTRANSPARENT_PEN                      pen = wxTRANSPARENT_PEN
141                  else:                  else:
142                      color = wxColour(stroke.red * 255,                      color = Color2wxColour(stroke)
                                      stroke.green * 255,  
                                      stroke.blue * 255)  
143                      pen = wxPen(color, stroke_width, wxSOLID)                      pen = wxPen(color, stroke_width, wxSOLID)
144        
145    
146              if shapetype == SHAPETYPE_POINT:              if shapetype == SHAPETYPE_POINT:
147                  self.dc.SetBrush(brush)                  self.dc.SetBrush(brush)
148                  self.dc.SetPen(pen)                  self.dc.SetPen(pen)
149                  self.draw_point_shape(layer, i)                  self.draw_point_shape(layer, i)
150              else:              else:
151                  self.draw_polygon_shape(layer, i, pen, brush)                  self.draw_polygon_shape(polygon_render_param, i, pen, brush)
152    
153      def layer_ids(self, layer):      def layer_ids(self, layer):
154          """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.
155            
156          The default implementation simply returns all ids in the layer.          The default implementation simply returns all ids in the layer.
157          Override in derived classes to be more precise.          Override in derived classes to be more precise.
158          """          """
159          return range(layer.NumShapes())          return range(layer.NumShapes())
160    
161      def draw_polygon_shape(self, layer, index, pen, brush):      def polygon_render_param(self, layer):
162          offx, offy = self.offset                  """Return the low-lever render parameter for the layer"""
163          draw_polygon_shape(layer.shapefile.cobject(), index,          offx, offy = self.offset
164                             self.dc, pen, brush,          return draw_polygon_init(layer.shapefile, self.dc,
165                             self.map.projection, layer.projection,                                   self.map.projection,
166                             self.scale, -self.scale, offx, offy)                                   layer.projection,
167                                     self.scale, -self.scale,
168                                     offx, offy)
169    
170        def draw_polygon_shape(self, draw_polygon_info, index, pen, brush):
171            draw_polygon_shape(draw_polygon_info, index, pen, brush)
172    
173      def projected_points(self, layer, index):      def projected_points(self, layer, index):
174          proj = self.map.projection          proj = self.map.projection
# Line 168  class MapRenderer: Line 199  class MapRenderer:
199          self.dc.DrawLines(points)          self.dc.DrawLines(points)
200    
201      def draw_point_shape(self, layer, index):      def draw_point_shape(self, layer, index):
202          p = self.projected_points(layer, index)[0]          pp = self.projected_points(layer, index)
203    
204            if len(pp) == 0: return # ignore Null Shapes which have no points
205    
206            p = pp[0]
207          radius = self.resolution * 5          radius = self.resolution * 5
208          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)
209    
# Line 216  class ScreenRenderer(MapRenderer): Line 251  class ScreenRenderer(MapRenderer):
251      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
252      honor_visibility = 1      honor_visibility = 1
253            
254      def RenderMap(self, map, region, selected_layer, selected_shape):      def RenderMap(self, map, region, selected_layer, selected_shapes):
255          """Render the map.          """Render the map.
256    
257          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
258          by a wxrect's asTuple method) needs to be redrawn. Highlight the          by a wxrect's asTuple method) needs to be redrawn. Highlight the
259          shape with id selected_shape in the selected_layer.          shapes given by the ids in selected_shapes in the
260            selected_layer.
261          """          """
262          self.update_region = region          self.update_region = region
263          self.selected_layer = selected_layer          self.selected_layer = selected_layer
264          self.selected_shape = selected_shape          self.selected_shapes = selected_shapes
265          self.render_map(map)          self.render_map(map)
266    
267      def draw_shape_layer(self, layer):      def draw_shape_layer(self, layer):
268          MapRenderer.draw_shape_layer(self, layer)          MapRenderer.draw_shape_layer(self, layer)
269          if layer is self.selected_layer and self.selected_shape is not None:          if layer is self.selected_layer and self.selected_shapes:
270              pen = wxPen(wxBLACK, 3, wxSOLID)              pen = wxPen(wxBLACK, 3, wxSOLID)
271              brush = wxBrush(wxBLACK, wxCROSS_HATCH)              brush = wxBrush(wxBLACK, wxCROSS_HATCH)
272                
273              shapetype = layer.ShapeType()              shapetype = layer.ShapeType()
             index = self.selected_shape  
274              if shapetype == SHAPETYPE_POLYGON:              if shapetype == SHAPETYPE_POLYGON:
275                  self.draw_polygon_shape(layer, index, pen, brush)                  offx, offy = self.offset
276                    renderparam = self.polygon_render_param(layer)
277                    func = self.draw_polygon_shape
278                    args = (pen, brush)
279              elif shapetype == SHAPETYPE_ARC:              elif shapetype == SHAPETYPE_ARC:
280                  self.draw_polygon_shape(layer, index, pen, None)                  renderparam = self.polygon_render_param(layer)
281              else:                  func = self.draw_polygon_shape
282                    args = (pen, None)
283                elif shapetype == SHAPETYPE_POINT:
284                    renderparam = layer
285                  self.dc.SetBrush(brush)                  self.dc.SetBrush(brush)
286                  self.dc.SetPen(pen)                  self.dc.SetPen(pen)
287                  if shapetype == SHAPETYPE_POINT:                  func = self.draw_point_shape
288                      self.draw_point_shape(layer, index)                  args = ()
289                  else:              else:
290                      raise TypeError(_("Unhandled shape type %s") % shapetype)                  raise TypeError(_("Unhandled shape type %s") % shapetype)
291    
292                for index in self.selected_shapes:
293                    func(renderparam, index, *args)
294    
295    
296      def layer_ids(self, layer):      def layer_ids(self, layer):
297          """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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