/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1539 by bh, Fri Aug 1 14:27:57 2003 UTC revision 2571 by jonathan, Fri Feb 18 14:54:17 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  from Thuban.Model.data import 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    
 from Thuban.Model.classification import Classification  
37  from Thuban.Model.color import Transparent  from Thuban.Model.color import Transparent
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  
   
         self.dc = dc  
         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  
41    
42          self.dc.BeginDrawing()  from math import floor
   
         #  
         # 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          self.dc.EndDrawing()  from Thuban.version import versions
47    
48      def draw_shape_layer(self, layer):  if Thuban.Model.resource.has_gdal_support():
49          scale = self.scale      from gdalwarp import ProjectRasterFile
         offx, offy = self.offset  
50    
         map_proj = self.map.projection  
         layer_proj = layer.projection  
51    
52          shapetype = layer.ShapeType()  # Map the strings used for the format parameter of the draw_raster_data
53    # method to the appropriate wxWindows constants
54    raster_format_map = {
55        "BMP": wxBITMAP_TYPE_BMP,
56        "JPEG": wxBITMAP_TYPE_JPEG,
57        "PNG": wxBITMAP_TYPE_PNG,
58        "TIFF": wxBITMAP_TYPE_TIF,
59        "GIF": wxBITMAP_TYPE_GIF,
60        }
61    
62          brush = wxTRANSPARENT_BRUSH  class MapRenderer(BaseRenderer):
         pen   = wxTRANSPARENT_PEN  
63    
64          old_prop = None      """Class to render a map onto a wxDC"""
         old_group = None  
         lc = layer.GetClassification()  
         field = layer.GetClassificationColumn()  
         defaultGroup = lc.GetDefaultGroup()  
65    
66        TRANSPARENT_PEN = wxTRANSPARENT_PEN
67        TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
68    
69        def make_point(self, x, y):
70            return wxPoint(int(round(x)), int(round(y)))
71    
72          if shapetype == SHAPETYPE_POINT:      def tools_for_property(self, prop):
73              draw_func = self.draw_point_shape          fill = prop.GetFill()
74              draw_func_param = layer          if fill is Transparent:
75                brush = self.TRANSPARENT_BRUSH
76          else:          else:
77              draw_func = draw_polygon_shape              brush = wxBrush(Color2wxColour(fill), wxSOLID)
             draw_func_param = self.polygon_render_param(layer)  
78    
79          table = layer.ShapeStore().Table()          stroke = prop.GetLineColor()
80          for i in self.layer_ids(layer):          if stroke is Transparent:
81                pen = self.TRANSPARENT_PEN
             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  
   
                 prop = group.GetProperties()  
   
                 if prop != old_prop:  
                     old_prop = prop  
   
                     if shapetype == SHAPETYPE_ARC:  
                         fill = Transparent  
                     else:  
                         fill = prop.GetFill()  
   
   
                     if fill is Transparent:  
                         brush = wxTRANSPARENT_BRUSH  
                     else:  
                         color = Color2wxColour(fill)  
                         brush = wxBrush(color, wxSOLID)  
   
                     stroke = prop.GetLineColor()  
                     stroke_width = prop.GetLineWidth()  
                     if stroke is Transparent:  
                         pen = wxTRANSPARENT_PEN  
                     else:  
                         color = Color2wxColour(stroke)  
                         pen = wxPen(color, stroke_width, wxSOLID)  
   
             draw_func(draw_func_param, i, pen, brush)  
   
     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  
82          else:          else:
83              if data is not None:              pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
84                  stream = cStringIO.StringIO(data)          return pen, brush
                 image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)  
                 bitmap = wxBitmapFromImage(image)  
                 self.dc.DrawBitmap(bitmap, 0, 0)  
85    
86      def layer_ids(self, layer):      def low_level_renderer(self, layer):
87          """Return the shape ids of the given layer that have to be drawn.          """Override inherited method to provide more efficient renderers
88    
89          The default implementation simply returns all ids in the layer.          If the underlying data format is not a shapefile or the layer
90          Override in derived classes to be more precise.          contains points shapes, simply use what the inherited method
91            returns.
92    
93            Otherwise, i.e. for arc and polygon use the more efficient
94            wxproj.draw_polygon_shape and its corresponding parameter
95            created with wxproj.draw_polygon_init.
96          """          """
97          return range(layer.NumShapes())          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
98                and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
99      def polygon_render_param(self, layer):              offx, offy = self.offset
100          """Return the low-lever render parameter for the layer"""              x = lambda a, b, c, d: None
101          offx, offy = self.offset              #return (True, x, None)
102          return draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,              return (True, draw_polygon_shape,
103                                   self.map.projection,                      draw_polygon_init(layer.ShapeStore().Shapefile(),
104                                   layer.projection,                                        self.dc, self.map.projection,
105                                   self.scale, -self.scale,                                        layer.projection,
106                                   offx, offy)                                        self.scale, -self.scale, offx, offy))
107            else:
108                return BaseRenderer.low_level_renderer(self, layer)
109    
110      def draw_polygon_shape(self, draw_polygon_info, index, pen, brush):      def label_font(self):
111          draw_polygon_shape(draw_polygon_info, index, pen, brush)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
112                          wxNORMAL)
113    
114      def projected_points(self, layer, index):      def projected_raster_layer(self, layer, srcProj, dstProj, extents,
115          proj = self.map.GetProjection()                                 resolution, dimensions, options):
         if proj is not None:  
             forward = proj.Forward  
         else:  
             forward = None  
         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, pen, brush):  
         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.SetBrush(brush)  
         self.dc.SetPen(pen)  
         self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)  
116    
117      def draw_label_layer(self, layer):          ret = None
         scale = self.scale  
         offx, offy = self.offset  
118    
119          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          if Thuban.Model.resource.has_gdal_support():
         self.dc.SetFont(font)  
120    
121          map_proj = self.map.projection              if versions['wxPython-tuple'] < (2,5,3):
122          if map_proj is not None:                  options = options | 4  # INVERT_MASK_BITS
123              forward = map_proj.Forward                  options = options & ~2 # ALPHA_MASK not supported
124    
125                try:
126                    ret = ProjectRasterFile(layer.GetImageFilename(),
127                                            srcProj, dstProj,
128                                            extents, resolution, dimensions,
129                                            options)
130                except (MemoryError, IOError, AttributeError, ValueError):
131                    # Why does this catch AttributeError and ValueError?
132                    # FIXME: The exception should be communicated to the user
133                    # better.
134                    traceback.print_exc()
135    
136            return ret
137    
138        def draw_raster_data(self, x,y, data, format = 'BMP'):
139    
140            mask = None
141            width = data[0]
142            height = data[1]
143            image_data, mask_data, alpha_data = data[2]
144    
145            if versions['wxPython-tuple'] < (2,5,3):
146                alpha_data = None
147    
148            if format == 'RAW':
149                image = wxEmptyImage(width, height)
150                image.SetData(image_data)
151                if mask_data is not None:
152                    mask = wxBitmapFromBits(mask_data, width, height, 1)
153                    mask = wxMask(mask)
154                elif alpha_data is not None:
155                    image.SetAlphaData(alpha_data)
156          else:          else:
157              forward = None              stream = cStringIO.StringIO(image_data)
158                image = wxImageFromStream(stream, raster_format_map[format])
159                if mask_data is not None:
160                    stream = cStringIO.StringIO(mask_data)
161                    mask = wxImageFromStream(stream, raster_format_map[format])
162                    mask = wxMask(wxBitmapFromImage(mask, 1))
163                elif alpha_data is not None:
164                    stream = cStringIO.StringIO(alpha_data)
165                    alpha = wxImageFromStream(stream, raster_format_map[format])
166                    image.SetAlpha(alpha.GetData()[:])
167    
168            bitmap = wxBitmapFromImage(image)
169            bitmap.SetMask(mask)
170    
171          for label in layer.Labels():          self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
             x = label.x  
             y = label.y  
             text = label.text  
             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)  
172    
173    
174  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
175    
176      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
177      honor_visibility = 1      honor_visibility = 1
178        
179      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
180          """Render the map.          """Render the map.
181    
182          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 329  class ScreenRenderer(MapRenderer): Line 184  class ScreenRenderer(MapRenderer):
184          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
185          selected_layer.          selected_layer.
186          """          """
         self.update_region = region  
187          self.selected_layer = selected_layer          self.selected_layer = selected_layer
188          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
189          self.render_map(map)          self.render_map()
190    
191      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
192          MapRenderer.draw_shape_layer(self, layer)          """Render the map.
193          if layer is self.selected_layer and self.selected_shapes:  
194              pen = wxPen(wxBLACK, 3, wxSOLID)          Only the given region (a tuple in window coordinates as returned
195              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
196            shapes given by the ids in selected_shapes in the
197              shapetype = layer.ShapeType()          selected_layer.
198              if shapetype == SHAPETYPE_POLYGON:          """
199                  offx, offy = self.offset          return self.render_map_incrementally()
200                  renderparam = self.polygon_render_param(layer)  
201                  func = self.draw_polygon_shape      def draw_selection_incrementally(self, layer, selected_shapes):
202                  args = (pen, brush)          """Draw the selected shapes in a emphasized way (i.e.
203              elif shapetype == SHAPETYPE_ARC:          with a special pen and brush.
204                  renderparam = self.polygon_render_param(layer)          The drawing is performed incrementally, that means every
205                  func = self.draw_polygon_shape          n shapes, the user can have interactions with the map.
206                  args = (pen, None)          n is currently fixed to 500.
207              elif shapetype == SHAPETYPE_POINT:  
208                  renderparam = layer          layer -- the layer where the shapes belong to.
209                  func = self.draw_point_shape          selected_shapes -- a list of the shape-ids representing the
210                  args = (pen, brush)                             selected shapes for the given layer.
211              else:          """
212                  raise TypeError(_("Unhandled shape type %s") % shapetype)          pen = wxPen(wxBLACK, 3, wxSOLID)
213            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
214    
215              for index in self.selected_shapes:          shapetype = layer.ShapeType()
216                  func(renderparam, index, *args)          useraw, func, param = self.low_level_renderer(layer)
217            args = (pen, brush)
218    
219            # for point shapes we need to find out the properties
220            # to determine the size. Based on table and field,
221            # we can find out the properties for object - see below.
222            if shapetype == SHAPETYPE_POINT:
223                lc = layer.GetClassification()
224                field = layer.GetClassificationColumn()
225                table = layer.ShapeStore().Table()
226    
227            count = 0
228            for index in selected_shapes:
229                count += 1
230                shape = layer.Shape(index)
231    
232                # Get the size of the specific property for this
233                # point
234                if shapetype == SHAPETYPE_POINT and field is not None:
235                    value = table.ReadValue(shape.ShapeID(), field)
236                    group = lc.FindGroup(value)
237                    size = group.GetProperties().GetSize()
238                    args = (pen, brush, size)
239    
240                if useraw:
241                    data = shape.RawData()
242                else:
243                    data = shape.Points()
244                func(param, data, *args)
245                if count % 500 == 0:
246                    yield True
247    
248      def layer_ids(self, layer):      def layer_shapes(self, layer):
249          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
250    
251          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 381  class ScreenRenderer(MapRenderer): Line 266  class ScreenRenderer(MapRenderer):
266          offx, offy = self.offset          offx, offy = self.offset
267          xs = []          xs = []
268          ys = []          ys = []
269          x, y, width, height = self.update_region          x, y, width, height = self.region
270          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
271                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
272              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 401  class ScreenRenderer(MapRenderer): Line 286  class ScreenRenderer(MapRenderer):
286  class ExportRenderer(ScreenRenderer):  class ExportRenderer(ScreenRenderer):
287    
288      honor_visibility = 1      honor_visibility = 1
289        
290      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
291                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
292    
293            In addition to all parameters of the the ScreenRender
294            constructor, this class requires and additional keyword argument
295            destination_region with a tuple (minx, miny, maxx, maxy) giving
296            the region in dc coordinates which is to contain the map.
297            """
298            self.destination_region = kw["destination_region"]
299            del kw["destination_region"]
300            ScreenRenderer.__init__(self, *args, **kw)
301    
302        def RenderMap(self, selected_layer, selected_shapes):
303          """Render the map.          """Render the map.
304    
305          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
306          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
307                    Thuban.UI.viewport.output_transform().
308    
309          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
310          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
311          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
312          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
313            available for map display.
314          """          """
315            
         self.update_region = region  
316          self.selected_layer = selected_layer          self.selected_layer = selected_layer
317          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
318    
319          # Get some dimensions          # Get some dimensions
320          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
321          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
322    
323          # Manipulate the offset to position the map          # Manipulate the offset to position the map
324          offx, offy = self.offset          offx, offy = self.offset
325          # 1. Shift to corner of map drawing area          # 1. Shift to corner of map drawing area
326          offx = offx + mminx          offx = offx + mminx
327          offy = offy + mminy          offy = offy + mminy
328    
329          # 2. Center the map on the map drawing area:          # 2. Center the map on the map drawing area:
330          # region identifies the region on the canvas view:          # region identifies the region on the canvas view:
331          # center of map drawing area - half the size of region: rendering origin          # center of map drawing area - half the size of region: rendering origin
332          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
333          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
334    
335          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
336            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
337    
338          # Draw the map          # Draw the map
339          self.dc.BeginDrawing()          self.dc.BeginDrawing()
340          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
341          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
342                                    urx, ury)                                    urx, ury)
343          self.render_map(map)          self.render_map()
344          self.dc.EndDrawing()          self.dc.EndDrawing()
345    
346          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 454  class ExportRenderer(ScreenRenderer): Line 351  class ExportRenderer(ScreenRenderer):
351          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
352          self.dc.SetFont(font)          self.dc.SetFont(font)
353    
354          self.render_frame(region)          self.render_frame()
355          self.render_legend(map)          self.render_legend()
356          self.render_scalebar(map)          self.render_scalebar()
357          self.dc.EndDrawing()          self.dc.EndDrawing()
358    
359      def render_frame(self, region):      def render_frame(self):
360          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
361    
362          dc = self.dc          dc = self.dc
# Line 468  class ExportRenderer(ScreenRenderer): Line 365  class ExportRenderer(ScreenRenderer):
365    
366          # Dimension stuff          # Dimension stuff
367          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
368          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
369    
370          # Page Frame          # Page Frame
371          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
372            
373          # Map Frame          # Map Frame
374          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
375          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
376            
377          # Legend Frame          # Legend Frame
378          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
379    
# Line 484  class ExportRenderer(ScreenRenderer): Line 381  class ExportRenderer(ScreenRenderer):
381          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
382                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
383    
384      def render_legend(self, map):      def render_legend(self):
385          """Render the legend on the Map."""          """Render the legend on the Map."""
386    
387          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 494  class ExportRenderer(ScreenRenderer): Line 391  class ExportRenderer(ScreenRenderer):
391    
392          # Dimension stuff          # Dimension stuff
393          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
394          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
395          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
396          iconwidth  = textheight          iconwidth  = textheight
397          iconheight = textheight          iconheight = textheight
398          stepy = textheight+3          stepy = textheight+3
399          dx = 10          dx = 10
400          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
401                                  # 5 pix inside legend frame                                  # 5 pix inside legend frame
402          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
403            
404          # Render the legend          # Render the legend
405          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
406          if map.HasLayers():          if self.map.HasLayers():
407              layers = map.Layers()              layers = self.map.Layers()[:]
408              layers.reverse()              layers.reverse()
409              for l in layers:              for l in layers:
410                  if l.Visible():                  if l.Visible():
# Line 520  class ExportRenderer(ScreenRenderer): Line 417  class ExportRenderer(ScreenRenderer):
417                          shapeType = l.ShapeType()                          shapeType = l.ShapeType()
418                          for g in clazz:                          for g in clazz:
419                              if g.IsVisible():                              if g.IsVisible():
420                                  previewer.Draw(dc,                                  previewer.Draw(dc,
421                                      wxRect(posx+dx, posy,                                      wxRect(posx+dx, posy,
422                                             iconwidth, iconheight),                                             iconwidth, iconheight),
423                                      g.GetProperties(), shapeType)                                      g.GetProperties(), shapeType)
424                                  dc.DrawText(g.GetDisplayText(),                                  dc.DrawText(g.GetDisplayText(),
425                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
426                                  posy+=stepy                                  posy+=stepy
427            
428      def render_scalebar(self, map):      def render_scalebar(self):
429          """Render the scalebar."""          """Render the scalebar."""
430    
431          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
432    
433          # Dimension stuff          # Dimension stuff
434          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
435          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
436          
437          # Render the scalebar          # Render the scalebar
438          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
439                               (mmaxx+10+5, mmaxy-25),                               (mmaxx+10+5, mmaxy-25),
440                               ((width-15-5) - (mmaxx+10+5),20)                               ((width-15-5) - (mmaxx+10+5),20)
441                              )                              )
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