/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1927 by bh, Mon Nov 10 16:57:35 2003 UTC revision 2601 by joey, Sat Apr 23 16:40:33 2005 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001-2004 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]> (2001-2003)
4  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]> (2003)
5  # Frank Koormann <[email protected]>  # Frank Koormann <[email protected]> (2003)
6    # Jan-Oliver Wagner <[email protected]> (2003, 2004)
7  #  #
8  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
9  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 15  __version__ = "$Revision$" Line 16  __version__ = "$Revision$"
16    
17  import cStringIO  import cStringIO
18    
19    import array
20    
21    import traceback
22    
23  from Thuban import _  from Thuban import _
24    
25  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
26      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
27      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
28      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, wxBITMAP_TYPE_JPEG      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
29        wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
30        wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits
31    
32  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
33    
# Line 36  import Thuban.Model.resource Line 43  import Thuban.Model.resource
43    
44  from baserenderer import BaseRenderer  from baserenderer import BaseRenderer
45    
46    from math import floor
47    
48    from types import StringType
49    
50    from Thuban.version import versions
51    
52    if Thuban.Model.resource.has_gdal_support():
53        from gdalwarp import ProjectRasterFile
54    
55    
56  # Map the strings used for the format parameter of the draw_raster_data  # Map the strings used for the format parameter of the draw_raster_data
57  # method to the appropriate wxWindows constants  # method to the appropriate wxWindows constants
58  raster_format_map = {  raster_format_map = {
59      "BMP": wxBITMAP_TYPE_BMP,      "BMP": wxBITMAP_TYPE_BMP,
60      "JPEG": wxBITMAP_TYPE_JPEG,      "JPEG": wxBITMAP_TYPE_JPEG,
61        "PNG": wxBITMAP_TYPE_PNG,
62        "TIFF": wxBITMAP_TYPE_TIF,
63        "GIF": wxBITMAP_TYPE_GIF,
64      }      }
65    
66  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
# Line 51  class MapRenderer(BaseRenderer): Line 70  class MapRenderer(BaseRenderer):
70      TRANSPARENT_PEN = wxTRANSPARENT_PEN      TRANSPARENT_PEN = wxTRANSPARENT_PEN
71      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
72    
73      make_point = wxPoint      def make_point(self, x, y):
74            return wxPoint(int(round(x)), int(round(y)))
75    
76      def tools_for_property(self, prop):      def tools_for_property(self, prop):
77          fill = prop.GetFill()          fill = prop.GetFill()
# Line 81  class MapRenderer(BaseRenderer): Line 101  class MapRenderer(BaseRenderer):
101          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
102              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
103              offx, offy = self.offset              offx, offy = self.offset
104                x = lambda a, b, c, d: None
105                #return (True, x, None)
106              return (True, draw_polygon_shape,              return (True, draw_polygon_shape,
107                      draw_polygon_init(layer.ShapeStore().Shapefile(),                      draw_polygon_init(layer.ShapeStore().Shapefile(),
108                                        self.dc, self.map.projection,                                        self.dc, self.map.projection,
# Line 90  class MapRenderer(BaseRenderer): Line 112  class MapRenderer(BaseRenderer):
112              return BaseRenderer.low_level_renderer(self, layer)              return BaseRenderer.low_level_renderer(self, layer)
113    
114      def label_font(self):      def label_font(self):
115          return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
116                          wxNORMAL)
117    
118        def projected_raster_layer(self, layer, srcProj, dstProj, extents,
119                                   resolution, dimensions, options):
120    
121            ret = None
122    
123            if Thuban.Model.resource.has_gdal_support():
124    
125                if versions['wxPython-tuple'] < (2,5,3):
126                    options = options | 4  # INVERT_MASK_BITS
127                    options = options & ~2 # ALPHA_MASK not supported
128    
129                try:
130                    ret = ProjectRasterFile(layer.GetImageFilename(),
131                                            srcProj, dstProj,
132                                            extents, resolution, dimensions,
133                                            options)
134                except (MemoryError, IOError, AttributeError, ValueError):
135                    # Why does this catch AttributeError and ValueError?
136                    # FIXME: The exception should be communicated to the user
137                    # better.
138                    traceback.print_exc()
139    
140            return ret
141    
142        def draw_raster_data(self, layer, x,y, data, format = 'BMP'):
143    
144            mask = None
145            alpha = None
146            width = data[0]
147            height = data[1]
148            image_data, mask_data, alpha_data = data[2]
149    
150            if versions['wxPython-tuple'] < (2,5,3):
151                alpha_data = None
152    
153            if format == 'RAW':
154                image = wxEmptyImage(width, height)
155                image.SetData(image_data)
156                if mask_data is not None:
157                    mask = wxBitmapFromBits(mask_data, width, height, 1)
158                    mask = wxMask(mask)
159                elif alpha_data is not None:
160                    # alpha_data is already in the right format
161                    alpha = alpha_data
162    
163            else:
164                stream = cStringIO.StringIO(image_data)
165                image = wxImageFromStream(stream, raster_format_map[format])
166                if mask_data is not None:
167                    stream = cStringIO.StringIO(mask_data)
168                    mask = wxImageFromStream(stream, raster_format_map[format])
169                    mask = wxMask(wxBitmapFromImage(mask, 1))
170                elif alpha_data is not None:
171                    stream = cStringIO.StringIO(alpha_data)
172                    alpha = wxImageFromStream(stream, raster_format_map[format])
173                    alpha = alpha.GetData()[:] # XXX: do we need to copy this?
174    
175            #
176            # if we are using the alpha_data then scale down the alpha values
177            # by the layer's opacity using a string translation table
178            #
179            if alpha is not None:
180                lo = layer.Opacity()
181                if lo == 0:
182                    return
183                elif lo == 1:
184                    a = alpha
185                else:
186                    tr = [int(i*lo) for i in range(256)]
187                    table = array.array('B', tr).tostring()
188                    a = alpha.translate(table)
189    
190                image.SetAlphaData(a)
191    
     def draw_raster_data(self, data, format = 'BMP'):  
         stream = cStringIO.StringIO(data)  
         image = wxImageFromStream(stream, raster_format_map[format])  
192          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
193          self.dc.DrawBitmap(bitmap, 0, 0)  
194            if mask is not None:
195                bitmap.SetMask(mask)
196    
197            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
198    
199    
200  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 127  class ScreenRenderer(MapRenderer): Line 225  class ScreenRenderer(MapRenderer):
225          return self.render_map_incrementally()          return self.render_map_incrementally()
226    
227      def draw_selection_incrementally(self, layer, selected_shapes):      def draw_selection_incrementally(self, layer, selected_shapes):
228            """Draw the selected shapes in a emphasized way (i.e.
229            with a special pen and brush.
230            The drawing is performed incrementally, that means every
231            n shapes, the user can have interactions with the map.
232            n is currently fixed to 500.
233    
234            layer -- the layer where the shapes belong to.
235            selected_shapes -- a list of the shape-ids representing the
236                               selected shapes for the given layer.
237            """
238          pen = wxPen(wxBLACK, 3, wxSOLID)          pen = wxPen(wxBLACK, 3, wxSOLID)
239          brush = wxBrush(wxBLACK, wxCROSS_HATCH)          brush = wxBrush(wxBLACK, wxCROSS_HATCH)
240    
241          shapetype = layer.ShapeType()          shapetype = layer.ShapeType()
242          useraw, func, param = self.low_level_renderer(layer)          useraw, func, param = self.low_level_renderer(layer)
243          args = (pen, brush)          args = (pen, brush)
244    
245            # for point shapes we need to find out the properties
246            # to determine the size. Based on table and field,
247            # we can find out the properties for object - see below.
248            if shapetype == SHAPETYPE_POINT:
249                lc = layer.GetClassification()
250                field = layer.GetClassificationColumn()
251                table = layer.ShapeStore().Table()
252    
253          count = 0          count = 0
254          for index in selected_shapes:          for index in selected_shapes:
255              count += 1              count += 1
256              shape = layer.Shape(index)              shape = layer.Shape(index)
257    
258                # Get the size of the specific property for this
259                # point
260                if shapetype == SHAPETYPE_POINT and field is not None:
261                    value = table.ReadValue(shape.ShapeID(), field)
262                    group = lc.FindGroup(value)
263                    size = group.GetProperties().GetSize()
264                    args = (pen, brush, size)
265    
266              if useraw:              if useraw:
267                  data = shape.RawData()                  data = shape.RawData()
268              else:              else:
# Line 233  class ExportRenderer(ScreenRenderer): Line 359  class ExportRenderer(ScreenRenderer):
359          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
360    
361          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
362            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
363    
364          # Draw the map          # Draw the map
365          self.dc.BeginDrawing()          self.dc.BeginDrawing()
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