/[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 588 by jonathan, Tue Apr 1 15:58:02 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 41  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 63  class MapRenderer: Line 73  class MapRenderer:
73          scale = self.scale          scale = self.scale
74          offx, offy = self.offset          offx, offy = self.offset
75    
         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)  
   
76          map_proj = self.map.projection          map_proj = self.map.projection
77          layer_proj = layer.projection          layer_proj = layer.projection
78    
79          shapetype = layer.ShapeType()          shapetype = layer.ShapeType()
80    
81          if shapetype == SHAPETYPE_POLYGON:          brush = wxTRANSPARENT_BRUSH
82              for i in self.layer_ids(layer):          pen   = wxTRANSPARENT_PEN
83    
84            old_prop = None
85            lc = layer.GetClassification()
86            field = lc.GetField()
87    
88            defaultProps = lc.GetDefaultGroup().GetProperties()
89    
90            for i in self.layer_ids(layer):
91                value = None
92    
93                if field is not None:
94                    try:
95                        record = layer.table.read_record(i)
96                        if record is not None:
97                            value = record[field]
98                    except:
99                        pass
100    
101                    #
102                    # if the above statements fail 'value' should
103                    # be null, at which point this call will
104                    # at least retreive the NullData
105                    #
106                    prop = lc.GetProperties(value)
107                else:
108                    prop = defaultProps
109    
110                # don't recreate new objects if they are the same as before
111                if prop != old_prop:
112                    old_prop = prop
113    
114                    if shapetype == SHAPETYPE_ARC:
115                        fill = Color.None
116                    else:
117                        fill = prop.GetFill()
118        
119                    if fill is Color.None:
120                        brush = wxTRANSPARENT_BRUSH
121                    else:
122                        color = Color2wxColour(fill)
123                        brush = wxBrush(color, wxSOLID)
124        
125                    stroke = prop.GetLineColor()
126                    stroke_width = prop.GetLineWidth()
127                    if stroke is Color.None:
128                        pen = wxTRANSPARENT_PEN
129                    else:
130                        color = Color2wxColour(stroke)
131                        pen = wxPen(color, stroke_width, wxSOLID)
132        
133                if shapetype == SHAPETYPE_POINT:
134                    self.dc.SetBrush(brush)
135                    self.dc.SetPen(pen)
136                    self.draw_point_shape(layer, i)
137                else:
138                  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)  
139    
140      def layer_ids(self, layer):      def layer_ids(self, layer):
141          """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 146  class MapRenderer: Line 181  class MapRenderer:
181          self.dc.DrawLines(points)          self.dc.DrawLines(points)
182    
183      def draw_point_shape(self, layer, index):      def draw_point_shape(self, layer, index):
184          p = self.projected_points(layer, index)[0]          pp = self.projected_points(layer, index)
185    
186            if len(pp) == 0: return # ignore Null Shapes which have no points
187    
188            p = pp[0]
189          radius = self.resolution * 5          radius = self.resolution * 5
190          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)
191    
# Line 194  class ScreenRenderer(MapRenderer): Line 233  class ScreenRenderer(MapRenderer):
233      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
234      honor_visibility = 1      honor_visibility = 1
235            
236      def RenderMap(self, map, region, selected_layer, selected_shape):      def RenderMap(self, map, region, selected_layer, selected_shapes):
237          """Render the map.          """Render the map.
238    
239          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
240          by a wxrect's asTuple method) needs to be redrawn. Highlight the          by a wxrect's asTuple method) needs to be redrawn. Highlight the
241          shape with id selected_shape in the selected_layer.          shapes given by the ids in selected_shapes in the
242            selected_layer.
243          """          """
244          self.update_region = region          self.update_region = region
245          self.selected_layer = selected_layer          self.selected_layer = selected_layer
246          self.selected_shape = selected_shape          self.selected_shapes = selected_shapes
247          self.render_map(map)          self.render_map(map)
248    
249      def draw_shape_layer(self, layer):      def draw_shape_layer(self, layer):
250          MapRenderer.draw_shape_layer(self, layer)          MapRenderer.draw_shape_layer(self, layer)
251          if layer is self.selected_layer and self.selected_shape is not None:          if layer is self.selected_layer and self.selected_shapes:
252              pen = wxPen(wxBLACK, 3, wxSOLID)              pen = wxPen(wxBLACK, 3, wxSOLID)
253              brush = wxBrush(wxBLACK, wxCROSS_HATCH)              brush = wxBrush(wxBLACK, wxCROSS_HATCH)
254                
255              shapetype = layer.ShapeType()              shapetype = layer.ShapeType()
             index = self.selected_shape  
256              if shapetype == SHAPETYPE_POLYGON:              if shapetype == SHAPETYPE_POLYGON:
257                  self.draw_polygon_shape(layer, index, pen, brush)                  func = self.draw_polygon_shape
258                    args = (pen, brush)
259              elif shapetype == SHAPETYPE_ARC:              elif shapetype == SHAPETYPE_ARC:
260                  self.draw_polygon_shape(layer, index, pen, None)                  func = self.draw_polygon_shape
261              else:                  args = (pen, None)
262                elif shapetype == SHAPETYPE_POINT:
263                  self.dc.SetBrush(brush)                  self.dc.SetBrush(brush)
264                  self.dc.SetPen(pen)                  self.dc.SetPen(pen)
265                  if shapetype == SHAPETYPE_POINT:                  func = self.draw_point_shape
266                      self.draw_point_shape(layer, index)                  args = ()
267                  else:              else:
268                      raise TypeError("Unhandled shape type %s" % shapetype)                  raise TypeError(_("Unhandled shape type %s") % shapetype)
269    
270                for index in self.selected_shapes:
271                    func(layer, index, *args)
272    
273      def layer_ids(self, layer):      def layer_ids(self, layer):
274          """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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