/[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 1165 by jonathan, Thu Jun 12 12:42:10 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    
36  from Thuban.Model.classification import Classification  from Thuban.Model.classification import Classification
37  from Thuban.Model.color import Color  from Thuban.Model.color import Color
38    import Thuban.Model.resource
39    
40  class MapRenderer:  class MapRenderer:
41    
# Line 64  class MapRenderer: Line 71  class MapRenderer:
71    
72      def render_map(self, map):      def render_map(self, map):
73          self.map = map          self.map = map
74            seenRaster = True
75    
76            if self.scale == 0:
77                return
78    
79            #
80            # This is only a good optimization if there is only one
81            # raster layer and the image covers the entire window (as
82            # it currently does). We note if there is a raster layer
83            # and only begin drawing layers once we have drawn it.
84            # That way we avoid drawing layers that won't be seen.
85            #
86            for layer in map.Layers():
87                if isinstance(layer, RasterLayer) and layer.Visible():
88                    seenRaster = False
89                    break
90    
91          for layer in map.Layers():          for layer in map.Layers():
92              # if honor_visibility is true, only draw visible layers,              # if honor_visibility is true, only draw visible layers,
93              # otherwise draw all layers              # otherwise draw all layers
94              if not self.honor_visibility or layer.Visible():              if not self.honor_visibility or layer.Visible():
95                  self.draw_shape_layer(layer)                  if isinstance(layer, Layer) and seenRaster:
96                        self.draw_shape_layer(layer)
97                    elif isinstance(layer, RasterLayer) \
98                        and Thuban.Model.resource.has_gdal_support():
99                        self.draw_raster_layer(layer)
100                        seenRaster = True
101    
102          self.draw_label_layer(map.LabelLayer())          self.draw_label_layer(map.LabelLayer())
103    
104      def draw_shape_layer(self, layer):      def draw_shape_layer(self, layer):
# Line 149  class MapRenderer: Line 179  class MapRenderer:
179    
180              draw_func(i)              draw_func(i)
181    
182        def draw_raster_layer(self, layer):
183            data = None
184            offx, offy = self.offset
185            width, height = self.dc.GetSizeTuple()
186    
187            inProj = ""
188            proj = layer.GetProjection()
189            if proj is not None:
190                for p in proj.GetAllParameters():
191                    inProj += "+" + p + " "
192    
193            outProj = ""
194            proj = self.map.GetProjection()
195            if proj is not None:
196                for p in proj.GetAllParameters():
197                    outProj += "+" + p + " "
198    
199            xmin = (0 - offx) / self.scale
200            ymin = (offy - height) / self.scale
201            xmax = (width - offx) / self.scale
202            ymax = (offy - 0) / self.scale
203    
204            try:
205                data = ProjectRasterFile(
206                    layer.GetImageFilename(),
207                    inProj,
208                    outProj,
209                    (xmin, ymin, xmax, ymax),
210                    "", (width, height))
211            except IOError, (strerr):
212                print strerr
213            except (AttributeError, ValueError):
214                pass
215            else:
216                if data is not None:
217                    stream = cStringIO.StringIO(data)
218                    image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)
219                    bitmap = wxBitmapFromImage(image)
220                    self.dc.BeginDrawing()
221                    self.dc.DrawBitmap(bitmap, 0, 0)
222                    self.dc.EndDrawing()
223    
224      def layer_ids(self, layer):      def layer_ids(self, layer):
225          """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.
226    
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