/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/baserenderer.py
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revision 1926 by bh, Mon Nov 10 16:57:19 2003 UTC revision 2278 by bh, Tue Jul 13 11:07:45 2004 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003, 2004 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]>
# Line 42  if Thuban.Model.resource.has_gdal_suppor Line 42  if Thuban.Model.resource.has_gdal_suppor
42  # (layer_class, draw_function) pairs. If the renderer has to draw a  # (layer_class, draw_function) pairs. If the renderer has to draw a
43  # non-builtin layer type, i.e. a layer that is not a subclass of Layer  # non-builtin layer type, i.e. a layer that is not a subclass of Layer
44  # or RasterLayer, it iterates through that list, tests whether the layer  # or RasterLayer, it iterates through that list, tests whether the layer
45  # to be drawin is an instance of layer_class and if so calls  # to be drawn is an instance of layer_class and if so calls
46  # draw_function with the renderer and the layer as arguments. Since  # draw_function with the renderer and the layer as arguments. Since
47  # drawing is done incrementally, the draw_function should return an  # drawing is done incrementally, the draw_function should return an
48  # iterable. The easiest way is to simply implement the draw_function as  # iterable. The easiest way is to simply implement the draw_function as
# Line 64  def add_renderer_extension(layer_class, Line 64  def add_renderer_extension(layer_class,
64      function should return an iterable. The easiest way is to simply      function should return an iterable. The easiest way is to simply
65      implement the draw_function as a generator and to yield True in      implement the draw_function as a generator and to yield True in
66      suitable places, or to return the empty tuple if it's not possible      suitable places, or to return the empty tuple if it's not possible
67      to do the rendering in incrementally.      to do the rendering incrementally.
68      """      """
69      _renderer_extensions.append((layer_class, function))      _renderer_extensions.append((layer_class, function))
70    
# Line 198  class BaseRenderer: Line 198  class BaseRenderer:
198              # if honor_visibility is true, only draw visible layers,              # if honor_visibility is true, only draw visible layers,
199              # otherwise draw all layers              # otherwise draw all layers
200              if not self.honor_visibility or layer.Visible():              if not self.honor_visibility or layer.Visible():
201                  if isinstance(layer, Layer) and seenRaster:                  if isinstance(layer, Layer):
202                      for i in self.draw_shape_layer_incrementally(layer):                      if seenRaster:
203                          yield True                          for i in self.draw_shape_layer_incrementally(layer):
204                                yield True
205                  elif isinstance(layer, RasterLayer) \                  elif isinstance(layer, RasterLayer) \
206                      and Thuban.Model.resource.has_gdal_support():                      and Thuban.Model.resource.has_gdal_support():
207                      self.draw_raster_layer(layer)                      self.draw_raster_layer(layer)
# Line 434  class BaseRenderer: Line 435  class BaseRenderer:
435          if not points:          if not points:
436              return              return
437    
438          radius = self.resolution * 5          radius = int(round(self.resolution * 5))
439          self.dc.SetBrush(brush)          self.dc.SetBrush(brush)
440          self.dc.SetPen(pen)          self.dc.SetPen(pen)
441          for part in points:          for part in points:
# Line 531  class BaseRenderer: Line 532  class BaseRenderer:
532              text = label.text              text = label.text
533              if forward:              if forward:
534                  x, y = forward(x, y)                  x, y = forward(x, y)
535              x = x * scale + offx              x = int(round(x * scale + offx))
536              y = -y * scale + offy              y = int(round(-y * scale + offy))
537              width, height = self.dc.GetTextExtent(text)              width, height = self.dc.GetTextExtent(text)
538              if label.halign == ALIGN_LEFT:              if label.halign == ALIGN_LEFT:
539                  # nothing to be done                  # nothing to be done
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