/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 909 by frank, Fri May 16 16:23:12 2003 UTC revision 938 by jonathan, Tue May 20 15:25:10 2003 UTC
# Line 9  Line 9 
9    
10  __version__ = "$Revision$"  __version__ = "$Revision$"
11    
12    import cStringIO
13    
14  from Thuban import _  from Thuban import _
15    
16  from wxPython.wx import wxMemoryDC, wxEmptyBitmap, \  from wxPython.wx import wxMemoryDC, wxEmptyBitmap, \
17      wxPoint, wxRect, wxPen, wxBrush, wxFont, \      wxPoint, wxRect, wxPen, wxBrush, wxFont, \
18      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
19      wxBLACK_PEN, wxRED_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL      wxBLACK_PEN, wxRED_PEN, wxBLACK, \
20        wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
21        wxBitmap, wxImageFromBitmap, wxBitmapFromImage, \
22        wxImageFromStream, wxBITMAP_TYPE_BMP
23    
24  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
25    from gdalwarp import ProjectRasterFile
26    
27  from Thuban.UI.common import Color2wxColour  from Thuban.UI.common import Color2wxColour
28  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
29  from Thuban.UI.scalebar import ScaleBar  from Thuban.UI.scalebar import ScaleBar
30    
31  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from Thuban.Model.layer import Layer, RasterLayer, \
32       SHAPETYPE_POINT       SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT
33  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \
34       ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE       ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE
35    
# Line 64  class MapRenderer: Line 70  class MapRenderer:
70    
71      def render_map(self, map):      def render_map(self, map):
72          self.map = map          self.map = map
73            seenRaster = True
74    
75            #
76            # This is only a good optimization if there is only one
77            # raster layer and the image covers the entire window (as
78            # it currently does).
79            #
80            for layer in map.Layers():
81                if isinstance(layer, RasterLayer):
82                    seenRaster = False
83                    break
84    
85          for layer in map.Layers():          for layer in map.Layers():
86              # if honor_visibility is true, only draw visible layers,              # if honor_visibility is true, only draw visible layers,
87              # otherwise draw all layers              # otherwise draw all layers
88              if not self.honor_visibility or layer.Visible():              if not self.honor_visibility or layer.Visible():
89                  self.draw_shape_layer(layer)                  if isinstance(layer, Layer) and seenRaster:
90                        self.draw_shape_layer(layer)
91                    elif isinstance(layer, RasterLayer):
92                        self.draw_raster_layer(layer)
93                        seenRaster = True
94    
95          self.draw_label_layer(map.LabelLayer())          self.draw_label_layer(map.LabelLayer())
96    
97      def draw_shape_layer(self, layer):      def draw_shape_layer(self, layer):
# Line 149  class MapRenderer: Line 172  class MapRenderer:
172    
173              draw_func(i)              draw_func(i)
174    
175        def draw_raster_layer(self, layer):
176            data = None
177            offx, offy = self.offset
178            width, height = self.dc.GetSizeTuple()
179    
180            inProj = ""
181            proj = layer.GetProjection()
182            if proj is not None:
183                for p in proj.GetAllParameters():
184                    inProj += "+" + p + " "
185    
186            outProj = ""
187            proj = self.map.GetProjection()
188            if proj is not None:
189                for p in proj.GetAllParameters():
190                    outProj += "+" + p + " "
191    
192            print "self.scale: ", self.scale, offx, offy, width, height
193            xmin = (0 - offx) / self.scale
194            ymin = (offy - height) / self.scale
195            xmax = (width - offx) / self.scale
196            ymax = (offy - 0) / self.scale
197    
198            try:
199                data = ProjectRasterFile(
200                    layer.GetImageFilename(),
201                    inProj,
202                    outProj,
203                    str(xmin), str(ymin), str(xmax), str(ymax),
204                    "", str(width), str(height));
205            except (AttributeError, IOError, ValueError):
206                pass
207            else:
208                if data is not None:
209                    stream = cStringIO.StringIO(data)
210                    image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)
211                    bitmap = wxBitmapFromImage(image)
212                    self.dc.BeginDrawing()
213                    self.dc.DrawBitmap(bitmap, 0, 0)
214                    self.dc.EndDrawing()
215    
216      def layer_ids(self, layer):      def layer_ids(self, layer):
217          """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.
218    
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