/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1234 by jonathan, Wed Jun 18 14:47:38 2003 UTC revision 2562 by jonathan, Wed Feb 16 21:14:47 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.
10    
11    from __future__ import generators
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    # $Source$
15    # $Id$
16    
17  import cStringIO  import cStringIO
18    
19  from Thuban import _  from Thuban import _
20    
21  from wxPython.wx import wxMemoryDC, wxEmptyBitmap, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
     wxPoint, wxRect, wxPen, wxBrush, wxFont, \  
22      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
23      wxBLACK_PEN, wxRED_PEN, wxBLACK, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
24      wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
25      wxBitmap, wxImageFromBitmap, wxBitmapFromImage, \      wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
26      wxImageFromStream, wxBITMAP_TYPE_BMP      wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits
27    
28  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
29    
# Line 27  from Thuban.UI.common import Color2wxCol Line 31  from Thuban.UI.common import Color2wxCol
31  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
32  from Thuban.UI.scalebar import ScaleBar  from Thuban.UI.scalebar import ScaleBar
33    
34  from Thuban.Model.layer import Layer, RasterLayer, \  from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
35       SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT       SHAPETYPE_POINT, RAW_SHAPEFILE
 from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \  
      ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE  
36    
37  from Thuban.Model.classification import Classification  from Thuban.Model.color import Transparent
 from Thuban.Model.color import Color  
38  import Thuban.Model.resource  import Thuban.Model.resource
39    
40  if Thuban.Model.resource.has_gdal_support():  from baserenderer import BaseRenderer
     from gdalwarp import ProjectRasterFile  
   
 class MapRenderer:  
   
     """Class to render a map onto a wxDC"""  
   
     honor_visibility = 1  
   
     def __init__(self, dc, scale, offset, resolution = 72.0,  
                  honor_visibility = None):  
         """Inititalize the renderer.  
   
         dc -- the wxPython DC to render on  
         scale, offset -- the scale factor and translation to convert  
                 between projected coordinates and the DC coordinates  
   
         resolution -- the assumed resolution of the DC. Used to convert  
                 absolute lengths like font sizes to DC coordinates  
   
         honor_visibility -- boolean. If true, honor the visibility flag  
                 of the layers, otherwise draw all layers. If None, use  
                 the renderer's default.  
         """  
         # resolution in pixel/inch  
41    
42          self.dc = dc  from math import floor
         self.scale = scale  
         self.offset = offset  
         if honor_visibility is not None:  
             self.honor_visibility = honor_visibility  
         # store the resolution in pixel/point because it's more useful  
         # later.  
         self.resolution = resolution / 72.0  
   
     def render_map(self, map):  
         self.map = map  
         seenRaster = True  
   
         if self.scale == 0:  
             return  
   
         #  
         # This is only a good optimization if there is only one  
         # raster layer and the image covers the entire window (as  
         # it currently does). We note if there is a raster layer  
         # and only begin drawing layers once we have drawn it.  
         # That way we avoid drawing layers that won't be seen.  
         #  
         if Thuban.Model.resource.has_gdal_support():  
             for layer in map.Layers():  
                 if isinstance(layer, RasterLayer) and layer.Visible():  
                     seenRaster = False  
                     break  
   
         for layer in map.Layers():  
             # if honor_visibility is true, only draw visible layers,  
             # otherwise draw all layers  
             if not self.honor_visibility or layer.Visible():  
                 if isinstance(layer, Layer) and seenRaster:  
                     self.draw_shape_layer(layer)  
                 elif isinstance(layer, RasterLayer) \  
                     and Thuban.Model.resource.has_gdal_support():  
                     self.draw_raster_layer(layer)  
                     seenRaster = True  
43    
44          self.draw_label_layer(map.LabelLayer())  from types import StringType
45    
46      def draw_shape_layer(self, layer):  from Thuban.version import versions
         scale = self.scale  
         offx, offy = self.offset  
47    
         map_proj = self.map.projection  
         layer_proj = layer.projection  
48    
49          shapetype = layer.ShapeType()  # Map the strings used for the format parameter of the draw_raster_data
50    # method to the appropriate wxWindows constants
51    raster_format_map = {
52        "BMP": wxBITMAP_TYPE_BMP,
53        "JPEG": wxBITMAP_TYPE_JPEG,
54        "PNG": wxBITMAP_TYPE_PNG,
55        "TIFF": wxBITMAP_TYPE_TIF,
56        "GIF": wxBITMAP_TYPE_GIF,
57        }
58    
59          brush = wxTRANSPARENT_BRUSH  class MapRenderer(BaseRenderer):
         pen   = wxTRANSPARENT_PEN  
60    
61          old_prop = None      """Class to render a map onto a wxDC"""
         old_group = None  
         lc = layer.GetClassification()  
         field = lc.GetField()  
         defaultGroup = lc.GetDefaultGroup()  
62    
63        TRANSPARENT_PEN = wxTRANSPARENT_PEN
64        TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
65    
66          if shapetype != SHAPETYPE_POINT:      def make_point(self, x, y):
67              polygon_render_param = self.polygon_render_param(layer)          return wxPoint(int(round(x)), int(round(y)))
68    
69          if shapetype == SHAPETYPE_POINT:      def tools_for_property(self, prop):
70              draw_func = lambda i: \          fill = prop.GetFill()
71                     self.draw_point_shape(layer, i)          if fill is Transparent:
72                brush = self.TRANSPARENT_BRUSH
73          else:          else:
74              draw_func = lambda i: \              brush = wxBrush(Color2wxColour(fill), wxSOLID)
                    self.draw_polygon_shape(polygon_render_param, i, pen, brush)  
   
         table = layer.ShapeStore().Table()  
         for i in self.layer_ids(layer):  
   
             if field is None:  
                 group = defaultGroup  
             else:  
                 record = table.ReadRowAsDict(i)  
                 assert record is not None  
                 group = lc.FindGroup(record[field])  
   
   
             if not group.IsVisible():  
                 continue  
   
   
             # don't recreate new objects if they are the same as before  
             if group is not old_group:  
                 old_group = group  
75    
76                  prop = group.GetProperties()          stroke = prop.GetLineColor()
77            if stroke is Transparent:
78                  if prop != old_prop:              pen = self.TRANSPARENT_PEN
                     old_prop = prop  
   
                     if shapetype == SHAPETYPE_ARC:  
                         fill = Color.Transparent  
                     else:  
                         fill = prop.GetFill()  
   
   
                     if fill is Color.Transparent:  
                         brush = wxTRANSPARENT_BRUSH  
                     else:  
                         color = Color2wxColour(fill)  
                         brush = wxBrush(color, wxSOLID)  
   
                     stroke = prop.GetLineColor()  
                     stroke_width = prop.GetLineWidth()  
                     if stroke is Color.Transparent:  
                         pen = wxTRANSPARENT_PEN  
                     else:  
                         color = Color2wxColour(stroke)  
                         pen = wxPen(color, stroke_width, wxSOLID)  
   
                     if shapetype == SHAPETYPE_POINT:  
                         self.dc.SetBrush(brush)  
                         self.dc.SetPen(pen)  
   
             draw_func(i)  
   
     def draw_raster_layer(self, layer):  
         data = None  
         offx, offy = self.offset  
         width, height = self.dc.GetSizeTuple()  
   
         inProj = ""  
         proj = layer.GetProjection()  
         if proj is not None:  
             for p in proj.GetAllParameters():  
                 inProj += "+" + p + " "  
   
         outProj = ""  
         proj = self.map.GetProjection()  
         if proj is not None:  
             for p in proj.GetAllParameters():  
                 outProj += "+" + p + " "  
   
         xmin = (0 - offx) / self.scale  
         ymin = (offy - height) / self.scale  
         xmax = (width - offx) / self.scale  
         ymax = (offy - 0) / self.scale  
   
         try:  
             data = ProjectRasterFile(  
                 layer.GetImageFilename(),  
                 inProj,  
                 outProj,  
                 (xmin, ymin, xmax, ymax),  
                 "", (width, height))  
         except IOError, (strerr):  
             print strerr  
         except (AttributeError, ValueError):  
             pass  
79          else:          else:
80              if data is not None:              pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
81                  stream = cStringIO.StringIO(data)          return pen, brush
                 image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)  
                 bitmap = wxBitmapFromImage(image)  
                 self.dc.BeginDrawing()  
                 self.dc.DrawBitmap(bitmap, 0, 0)  
                 self.dc.EndDrawing()  
82    
83      def layer_ids(self, layer):      def low_level_renderer(self, layer):
84          """Return the shape ids of the given layer that have to be drawn.          """Override inherited method to provide more efficient renderers
85    
86          The default implementation simply returns all ids in the layer.          If the underlying data format is not a shapefile or the layer
87          Override in derived classes to be more precise.          contains points shapes, simply use what the inherited method
88            returns.
89    
90            Otherwise, i.e. for arc and polygon use the more efficient
91            wxproj.draw_polygon_shape and its corresponding parameter
92            created with wxproj.draw_polygon_init.
93          """          """
94          return range(layer.NumShapes())          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
95                and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
96      def polygon_render_param(self, layer):              offx, offy = self.offset
97          """Return the low-lever render parameter for the layer"""              x = lambda a, b, c, d: None
98          offx, offy = self.offset              #return (True, x, None)
99          return draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,              return (True, draw_polygon_shape,
100                                   self.map.projection,                      draw_polygon_init(layer.ShapeStore().Shapefile(),
101                                   layer.projection,                                        self.dc, self.map.projection,
102                                   self.scale, -self.scale,                                        layer.projection,
103                                   offx, offy)                                        self.scale, -self.scale, offx, offy))
   
     def draw_polygon_shape(self, draw_polygon_info, index, pen, brush):  
         draw_polygon_shape(draw_polygon_info, index, pen, brush)  
   
     def projected_points(self, layer, index):  
         proj = self.map.GetProjection()  
         if proj is not None:  
             forward = proj.Forward  
104          else:          else:
105              forward = None              return BaseRenderer.low_level_renderer(self, layer)
         proj = layer.GetProjection()  
         if proj is not None:  
             inverse = proj.Inverse  
         else:  
             inverse = None  
         shape = layer.Shape(index)  
         points = []  
         scale = self.scale  
         offx, offy = self.offset  
         for x, y in shape.Points():  
             if inverse:  
                 x, y = inverse(x, y)  
             if forward:  
                 x, y = forward(x, y)  
             points.append(wxPoint(x * scale + offx,  
                                   -y * scale + offy))  
         return points  
   
     def draw_arc_shape(self, layer, index):  
         points = self.projected_points(layer, index)  
         self.dc.DrawLines(points)  
   
     def draw_point_shape(self, layer, index):  
         pp = self.projected_points(layer, index)  
   
         if len(pp) == 0: return # ignore Null Shapes which have no points  
   
         p = pp[0]  
         radius = self.resolution * 5  
         self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)  
   
     def draw_label_layer(self, layer):  
         scale = self.scale  
         offx, offy = self.offset  
106    
107          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)      def label_font(self):
108          self.dc.SetFont(font)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
109                          wxNORMAL)
110          map_proj = self.map.projection  
111          if map_proj is not None:      def draw_raster_data(self, x,y, data, format = 'BMP'):
112              forward = map_proj.Forward  
113            mask = None
114            width = data[0]
115            height = data[1]
116            image_data, mask_data, alpha_data = data[2]
117    
118            if versions['wxPython-tuple'] < (2,5,3):
119                alpha_data = None
120    
121            if format == 'RAW':
122                image = wxEmptyImage(width, height)
123                image.SetData(image_data)
124                if mask_data is not None:
125                    mask = wxBitmapFromBits(mask_data, width, height, 1)
126                    mask = wxMask(mask)
127                elif alpha_data is not None:
128                    image.SetAlphaData(alpha_data)
129          else:          else:
130              forward = None              stream = cStringIO.StringIO(image_data)
131                image = wxImageFromStream(stream, raster_format_map[format])
132                if mask_data is not None:
133                    stream = cStringIO.StringIO(mask_data)
134                    mask = wxImageFromStream(stream, raster_format_map[format])
135                    mask = wxMask(wxBitmapFromImage(mask, 1))
136                elif alpha_data is not None:
137                    stream = cStringIO.StringIO(alpha_data)
138                    alpha = wxImageFromStream(stream, raster_format_map[format])
139                    image.SetAlpha(alpha.GetData()[:])
140    
141          for label in layer.Labels():          bitmap = wxBitmapFromImage(image)
142              x = label.x          bitmap.SetMask(mask)
143              y = label.y  
144              text = label.text          self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
             if forward:  
                 x, y = forward(x, y)  
             x = x * scale + offx  
             y = -y * scale + offy  
             width, height = self.dc.GetTextExtent(text)  
             if label.halign == ALIGN_LEFT:  
                 # nothing to be done  
                 pass  
             elif label.halign == ALIGN_RIGHT:  
                 x = x - width  
             elif label.halign == ALIGN_CENTER:  
                 x = x - width/2  
             if label.valign == ALIGN_TOP:  
                 # nothing to be done  
                 pass  
             elif label.valign == ALIGN_BOTTOM:  
                 y = y - height  
             elif label.valign == ALIGN_CENTER:  
                 y = y - height/2  
             self.dc.DrawText(text, x, y)  
145    
146    
147  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
148    
149      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
150      honor_visibility = 1      honor_visibility = 1
151        
152      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
153          """Render the map.          """Render the map.
154    
155          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 334  class ScreenRenderer(MapRenderer): Line 157  class ScreenRenderer(MapRenderer):
157          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
158          selected_layer.          selected_layer.
159          """          """
         self.update_region = region  
160          self.selected_layer = selected_layer          self.selected_layer = selected_layer
161          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
162          self.render_map(map)          self.render_map()
163    
164      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
165          MapRenderer.draw_shape_layer(self, layer)          """Render the map.
166          if layer is self.selected_layer and self.selected_shapes:  
167              pen = wxPen(wxBLACK, 3, wxSOLID)          Only the given region (a tuple in window coordinates as returned
168              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
169            shapes given by the ids in selected_shapes in the
170              shapetype = layer.ShapeType()          selected_layer.
171              if shapetype == SHAPETYPE_POLYGON:          """
172                  offx, offy = self.offset          return self.render_map_incrementally()
173                  renderparam = self.polygon_render_param(layer)  
174                  func = self.draw_polygon_shape      def draw_selection_incrementally(self, layer, selected_shapes):
175                  args = (pen, brush)          """Draw the selected shapes in a emphasized way (i.e.
176              elif shapetype == SHAPETYPE_ARC:          with a special pen and brush.
177                  renderparam = self.polygon_render_param(layer)          The drawing is performed incrementally, that means every
178                  func = self.draw_polygon_shape          n shapes, the user can have interactions with the map.
179                  args = (pen, None)          n is currently fixed to 500.
180              elif shapetype == SHAPETYPE_POINT:  
181                  renderparam = layer          layer -- the layer where the shapes belong to.
182                  self.dc.SetBrush(brush)          selected_shapes -- a list of the shape-ids representing the
183                  self.dc.SetPen(pen)                             selected shapes for the given layer.
184                  func = self.draw_point_shape          """
185                  args = ()          pen = wxPen(wxBLACK, 3, wxSOLID)
186              else:          brush = wxBrush(wxBLACK, wxCROSS_HATCH)
                 raise TypeError(_("Unhandled shape type %s") % shapetype)  
187    
188              for index in self.selected_shapes:          shapetype = layer.ShapeType()
189                  func(renderparam, index, *args)          useraw, func, param = self.low_level_renderer(layer)
190            args = (pen, brush)
191    
192            # for point shapes we need to find out the properties
193            # to determine the size. Based on table and field,
194            # we can find out the properties for object - see below.
195            if shapetype == SHAPETYPE_POINT:
196                lc = layer.GetClassification()
197                field = layer.GetClassificationColumn()
198                table = layer.ShapeStore().Table()
199    
200            count = 0
201            for index in selected_shapes:
202                count += 1
203                shape = layer.Shape(index)
204    
205                # Get the size of the specific property for this
206                # point
207                if shapetype == SHAPETYPE_POINT and field is not None:
208                    value = table.ReadValue(shape.ShapeID(), field)
209                    group = lc.FindGroup(value)
210                    size = group.GetProperties().GetSize()
211                    args = (pen, brush, size)
212    
213      def layer_ids(self, layer):              if useraw:
214                    data = shape.RawData()
215                else:
216                    data = shape.Points()
217                func(param, data, *args)
218                if count % 500 == 0:
219                    yield True
220    
221        def layer_shapes(self, layer):
222          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
223    
224          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 389  class ScreenRenderer(MapRenderer): Line 239  class ScreenRenderer(MapRenderer):
239          offx, offy = self.offset          offx, offy = self.offset
240          xs = []          xs = []
241          ys = []          ys = []
242          x, y, width, height = self.update_region          x, y, width, height = self.region
243          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
244                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
245              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 409  class ScreenRenderer(MapRenderer): Line 259  class ScreenRenderer(MapRenderer):
259  class ExportRenderer(ScreenRenderer):  class ExportRenderer(ScreenRenderer):
260    
261      honor_visibility = 1      honor_visibility = 1
262        
263      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
264                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
265    
266            In addition to all parameters of the the ScreenRender
267            constructor, this class requires and additional keyword argument
268            destination_region with a tuple (minx, miny, maxx, maxy) giving
269            the region in dc coordinates which is to contain the map.
270            """
271            self.destination_region = kw["destination_region"]
272            del kw["destination_region"]
273            ScreenRenderer.__init__(self, *args, **kw)
274    
275        def RenderMap(self, selected_layer, selected_shapes):
276          """Render the map.          """Render the map.
277    
278          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
279          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
280                    Thuban.UI.viewport.output_transform().
281    
282          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
283          legend/scalebar and one around the map), the map, the legend and the          legend/scalebar and one around the map), the map, the legend and
284          scalebar on the given DC. The map is rendered with the region displayed          the scalebar on the given DC. The map is rendered with the
285          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
286            available for map display.
287          """          """
288            
         self.update_region = region  
289          self.selected_layer = selected_layer          self.selected_layer = selected_layer
290          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
291    
292          # Get some dimensions          # Get some dimensions
293          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
294          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
295    
296          # Manipulate the offset to position the map          # Manipulate the offset to position the map
297          offx, offy = self.offset          offx, offy = self.offset
298          # 1. Shift to corner of map drawing area          # 1. Shift to corner of map drawing area
299          offx = offx + mminx          offx = offx + mminx
300          offy = offy + mminy          offy = offy + mminy
301    
302          # 2. Center the map on the map drawing area:          # 2. Center the map on the map drawing area:
303          # region identifies the region on the canvas view:          # region identifies the region on the canvas view:
304          # center of map drawing area - half the size of region: rendering origin          # center of map drawing area - half the size of region: rendering origin
305          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
306          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
307    
308          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
309            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
310    
311          # Draw the map          # Draw the map
312          self.dc.BeginDrawing()          self.dc.BeginDrawing()
313          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
314          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
315                                    urx, ury)                                    urx, ury)
316          self.render_map(map)          self.render_map()
317          self.dc.EndDrawing()          self.dc.EndDrawing()
318    
319          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 462  class ExportRenderer(ScreenRenderer): Line 324  class ExportRenderer(ScreenRenderer):
324          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
325          self.dc.SetFont(font)          self.dc.SetFont(font)
326    
327          self.render_frame(region)          self.render_frame()
328          self.render_legend(map)          self.render_legend()
329          self.render_scalebar(map)          self.render_scalebar()
330          self.dc.EndDrawing()          self.dc.EndDrawing()
331    
332      def render_frame(self, region):      def render_frame(self):
333          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
334    
335          dc = self.dc          dc = self.dc
# Line 476  class ExportRenderer(ScreenRenderer): Line 338  class ExportRenderer(ScreenRenderer):
338    
339          # Dimension stuff          # Dimension stuff
340          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
341          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
342    
343          # Page Frame          # Page Frame
344          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
345            
346          # Map Frame          # Map Frame
347          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
348          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
349            
350          # Legend Frame          # Legend Frame
351          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
352    
# Line 492  class ExportRenderer(ScreenRenderer): Line 354  class ExportRenderer(ScreenRenderer):
354          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
355                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
356    
357      def render_legend(self, map):      def render_legend(self):
358          """Render the legend on the Map."""          """Render the legend on the Map."""
359    
360          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 502  class ExportRenderer(ScreenRenderer): Line 364  class ExportRenderer(ScreenRenderer):
364    
365          # Dimension stuff          # Dimension stuff
366          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
367          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
368          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
369          iconwidth  = textheight          iconwidth  = textheight
370          iconheight = textheight          iconheight = textheight
371          stepy = textheight+3          stepy = textheight+3
372          dx = 10          dx = 10
373          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
374                                  # 5 pix inside legend frame                                  # 5 pix inside legend frame
375          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
376            
377          # Render the legend          # Render the legend
378          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
379          if map.HasLayers():          if self.map.HasLayers():
380              for l in map.Layers():              layers = self.map.Layers()[:]
381                layers.reverse()
382                for l in layers:
383                  if l.Visible():                  if l.Visible():
384                      # Render title                      # Render title
385                      dc.DrawText(l.Title(), posx, posy)                      dc.DrawText(l.Title(), posx, posy)
386                      posy+=stepy                      posy+=stepy
387                      # Render classification                      if l.HasClassification():
388                      clazz = l.GetClassification()                          # Render classification
389                      shapeType = l.ShapeType()                          clazz = l.GetClassification()
390                      for g in clazz:                          shapeType = l.ShapeType()
391                          if g.IsVisible():                          for g in clazz:
392                              previewer.Draw(dc,                              if g.IsVisible():
393                                  wxRect(posx+dx, posy, iconwidth, iconheight),                                  previewer.Draw(dc,
394                                  g.GetProperties(), shapeType)                                      wxRect(posx+dx, posy,
395                              dc.DrawText(g.GetDisplayText(),                                             iconwidth, iconheight),
396                                          posx+2*dx+iconwidth, posy)                                      g.GetProperties(), shapeType)
397                              posy+=stepy                                  dc.DrawText(g.GetDisplayText(),
398                                                        posx+2*dx+iconwidth, posy)
399      def render_scalebar(self, map):                                  posy+=stepy
400    
401        def render_scalebar(self):
402          """Render the scalebar."""          """Render the scalebar."""
403    
404          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
405    
406          # Dimension stuff          # Dimension stuff
407          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
408          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
409          
410          # Render the scalebar          # Render the scalebar
411          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
412                               (mmaxx+10+5, mmaxy-25),                               (mmaxx+10+5, mmaxy-25),
413                               ((width-15-5) - (mmaxx+10+5),20)                               ((width-15-5) - (mmaxx+10+5),20)
414                              )                              )
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