/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1219 by bh, Mon Jun 16 17:42:54 2003 UTC revision 2394 by jan, Wed Nov 17 22:02:29 2004 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, wxBITMAP_TYPE_JPEG
     wxBitmap, wxImageFromBitmap, wxBitmapFromImage, \  
     wxImageFromStream, wxBITMAP_TYPE_BMP  
25    
26  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
 from gdalwarp import ProjectRasterFile  
27    
28  from Thuban.UI.common import Color2wxColour  from Thuban.UI.common import Color2wxColour
29  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
30  from Thuban.UI.scalebar import ScaleBar  from Thuban.UI.scalebar import ScaleBar
31    
32  from Thuban.Model.layer import Layer, RasterLayer, \  from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
33       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  
34    
35  from Thuban.Model.classification import Classification  from Thuban.Model.color import Transparent
 from Thuban.Model.color import Color  
36  import Thuban.Model.resource  import Thuban.Model.resource
37    
38  class MapRenderer:  from baserenderer import BaseRenderer
   
     """Class to render a map onto a wxDC"""  
   
     honor_visibility = 1  
39    
     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  
40    
41          self.dc = dc  # Map the strings used for the format parameter of the draw_raster_data
42          self.scale = scale  # method to the appropriate wxWindows constants
43          self.offset = offset  raster_format_map = {
44          if honor_visibility is not None:      "BMP": wxBITMAP_TYPE_BMP,
45              self.honor_visibility = honor_visibility      "JPEG": wxBITMAP_TYPE_JPEG,
46          # 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.  
         #  
         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  
47    
48          self.draw_label_layer(map.LabelLayer())  class MapRenderer(BaseRenderer):
49    
50      def draw_shape_layer(self, layer):      """Class to render a map onto a wxDC"""
         scale = self.scale  
         offx, offy = self.offset  
   
         map_proj = self.map.projection  
         layer_proj = layer.projection  
   
         shapetype = layer.ShapeType()  
   
         brush = wxTRANSPARENT_BRUSH  
         pen   = wxTRANSPARENT_PEN  
   
         old_prop = None  
         old_group = None  
         lc = layer.GetClassification()  
         field = lc.GetField()  
         defaultGroup = lc.GetDefaultGroup()  
51    
52        TRANSPARENT_PEN = wxTRANSPARENT_PEN
53        TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
54    
55          if shapetype != SHAPETYPE_POINT:      def make_point(self, x, y):
56              polygon_render_param = self.polygon_render_param(layer)          return wxPoint(int(round(x)), int(round(y)))
57    
58          if shapetype == SHAPETYPE_POINT:      def tools_for_property(self, prop):
59              draw_func = lambda i: \          fill = prop.GetFill()
60                     self.draw_point_shape(layer, i)          if fill is Transparent:
61                brush = self.TRANSPARENT_BRUSH
62          else:          else:
63              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  
   
64    
65              # don't recreate new objects if they are the same as before          stroke = prop.GetLineColor()
66              if group is not old_group:          if stroke is Transparent:
67                  old_group = group              pen = self.TRANSPARENT_PEN
   
                 prop = group.GetProperties()  
   
                 if prop != old_prop:  
                     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  
68          else:          else:
69              if data is not None:              pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
70                  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()  
71    
72      def layer_ids(self, layer):      def low_level_renderer(self, layer):
73          """Return the shape ids of the given layer that have to be drawn.          """Override inherited method to provide more efficient renderers
74    
75          The default implementation simply returns all ids in the layer.          If the underlying data format is not a shapefile or the layer
76          Override in derived classes to be more precise.          contains points shapes, simply use what the inherited method
77            returns.
78    
79            Otherwise, i.e. for arc and polygon use the more efficient
80            wxproj.draw_polygon_shape and its corresponding parameter
81            created with wxproj.draw_polygon_init.
82          """          """
83          return range(layer.NumShapes())          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
84                and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
85      def polygon_render_param(self, layer):              offx, offy = self.offset
86          """Return the low-lever render parameter for the layer"""              return (True, draw_polygon_shape,
87          offx, offy = self.offset                      draw_polygon_init(layer.ShapeStore().Shapefile(),
88          return draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,                                        self.dc, self.map.projection,
89                                   self.map.projection,                                        layer.projection,
90                                   layer.projection,                                        self.scale, -self.scale, 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  
91          else:          else:
92              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)  
93    
94      def draw_label_layer(self, layer):      def label_font(self):
95          scale = self.scale          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
96          offx, offy = self.offset                        wxNORMAL)
97    
98          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)      def draw_raster_data(self, data, format = 'BMP'):
99          self.dc.SetFont(font)          stream = cStringIO.StringIO(data)
100            image = wxImageFromStream(stream, raster_format_map[format])
101          map_proj = self.map.projection          bitmap = wxBitmapFromImage(image)
102          if map_proj is not None:          self.dc.DrawBitmap(bitmap, 0, 0)
             forward = map_proj.Forward  
         else:  
             forward = None  
   
         for label in layer.Labels():  
             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)  
103    
104    
105  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
106    
107      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
108      honor_visibility = 1      honor_visibility = 1
109        
110      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
111          """Render the map.          """Render the map.
112    
113          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 331  class ScreenRenderer(MapRenderer): Line 115  class ScreenRenderer(MapRenderer):
115          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
116          selected_layer.          selected_layer.
117          """          """
         self.update_region = region  
118          self.selected_layer = selected_layer          self.selected_layer = selected_layer
119          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
120          self.render_map(map)          self.render_map()
121    
122      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
123          MapRenderer.draw_shape_layer(self, layer)          """Render the map.
         if layer is self.selected_layer and self.selected_shapes:  
             pen = wxPen(wxBLACK, 3, wxSOLID)  
             brush = wxBrush(wxBLACK, wxCROSS_HATCH)  
   
             shapetype = layer.ShapeType()  
             if shapetype == SHAPETYPE_POLYGON:  
                 offx, offy = self.offset  
                 renderparam = self.polygon_render_param(layer)  
                 func = self.draw_polygon_shape  
                 args = (pen, brush)  
             elif shapetype == SHAPETYPE_ARC:  
                 renderparam = self.polygon_render_param(layer)  
                 func = self.draw_polygon_shape  
                 args = (pen, None)  
             elif shapetype == SHAPETYPE_POINT:  
                 renderparam = layer  
                 self.dc.SetBrush(brush)  
                 self.dc.SetPen(pen)  
                 func = self.draw_point_shape  
                 args = ()  
             else:  
                 raise TypeError(_("Unhandled shape type %s") % shapetype)  
124    
125              for index in self.selected_shapes:          Only the given region (a tuple in window coordinates as returned
126                  func(renderparam, index, *args)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
127            shapes given by the ids in selected_shapes in the
128            selected_layer.
129            """
130            return self.render_map_incrementally()
131    
132        def draw_selection_incrementally(self, layer, selected_shapes):
133            """Draw the selected shapes in a emphasized way (i.e.
134            with a special pen and brush.
135            The drawing is performed incrementally, that means every
136            n shapes, the user can have interactions with the map.
137            n is currently fixed to 500.
138    
139            layer -- the layer where the shapes belong to.
140            selected_shapes -- a list of the shape-ids representing the
141                               selected shapes for the given layer.
142            """
143            pen = wxPen(wxBLACK, 3, wxSOLID)
144            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
145    
146            shapetype = layer.ShapeType()
147            useraw, func, param = self.low_level_renderer(layer)
148            args = (pen, brush)
149    
150            # for point shapes we need to find out the properties
151            # to determine the size. Based on table and field,
152            # we can find out the properties for object - see below.
153            if shapetype == SHAPETYPE_POINT:
154                lc = layer.GetClassification()
155                field = layer.GetClassificationColumn()
156                table = layer.ShapeStore().Table()
157    
158            count = 0
159            for index in selected_shapes:
160                count += 1
161                shape = layer.Shape(index)
162    
163                # Get the size of the specific property for this
164                # point
165                if shapetype == SHAPETYPE_POINT:
166                    value = table.ReadValue(shape.ShapeID(), field)
167                    group = lc.FindGroup(value)
168                    size = group.GetProperties().GetSize()
169                    args = (pen, brush, size)
170    
171      def layer_ids(self, layer):              if useraw:
172                    data = shape.RawData()
173                else:
174                    data = shape.Points()
175                func(param, data, *args)
176                if count % 500 == 0:
177                    yield True
178    
179        def layer_shapes(self, layer):
180          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
181    
182          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 386  class ScreenRenderer(MapRenderer): Line 197  class ScreenRenderer(MapRenderer):
197          offx, offy = self.offset          offx, offy = self.offset
198          xs = []          xs = []
199          ys = []          ys = []
200          x, y, width, height = self.update_region          x, y, width, height = self.region
201          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
202                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
203              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 406  class ScreenRenderer(MapRenderer): Line 217  class ScreenRenderer(MapRenderer):
217  class ExportRenderer(ScreenRenderer):  class ExportRenderer(ScreenRenderer):
218    
219      honor_visibility = 1      honor_visibility = 1
220        
221      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
222                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
223    
224            In addition to all parameters of the the ScreenRender
225            constructor, this class requires and additional keyword argument
226            destination_region with a tuple (minx, miny, maxx, maxy) giving
227            the region in dc coordinates which is to contain the map.
228            """
229            self.destination_region = kw["destination_region"]
230            del kw["destination_region"]
231            ScreenRenderer.__init__(self, *args, **kw)
232    
233        def RenderMap(self, selected_layer, selected_shapes):
234          """Render the map.          """Render the map.
235    
236          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
237          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
238                    Thuban.UI.viewport.output_transform().
239    
240          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
241          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
242          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
243          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
244            available for map display.
245          """          """
246            
         self.update_region = region  
247          self.selected_layer = selected_layer          self.selected_layer = selected_layer
248          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
249    
250          # Get some dimensions          # Get some dimensions
251          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
252          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
253    
254          # Manipulate the offset to position the map          # Manipulate the offset to position the map
255          offx, offy = self.offset          offx, offy = self.offset
256          # 1. Shift to corner of map drawing area          # 1. Shift to corner of map drawing area
257          offx = offx + mminx          offx = offx + mminx
258          offy = offy + mminy          offy = offy + mminy
259    
260          # 2. Center the map on the map drawing area:          # 2. Center the map on the map drawing area:
261          # region identifies the region on the canvas view:          # region identifies the region on the canvas view:
262          # center of map drawing area - half the size of region: rendering origin          # center of map drawing area - half the size of region: rendering origin
263          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
264          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
# Line 446  class ExportRenderer(ScreenRenderer): Line 268  class ExportRenderer(ScreenRenderer):
268          # Draw the map          # Draw the map
269          self.dc.BeginDrawing()          self.dc.BeginDrawing()
270          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
271          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
272                                    urx, ury)                                    urx, ury)
273          self.render_map(map)          self.render_map()
274          self.dc.EndDrawing()          self.dc.EndDrawing()
275    
276          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 459  class ExportRenderer(ScreenRenderer): Line 281  class ExportRenderer(ScreenRenderer):
281          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
282          self.dc.SetFont(font)          self.dc.SetFont(font)
283    
284          self.render_frame(region)          self.render_frame()
285          self.render_legend(map)          self.render_legend()
286          self.render_scalebar(map)          self.render_scalebar()
287          self.dc.EndDrawing()          self.dc.EndDrawing()
288    
289      def render_frame(self, region):      def render_frame(self):
290          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
291    
292          dc = self.dc          dc = self.dc
# Line 473  class ExportRenderer(ScreenRenderer): Line 295  class ExportRenderer(ScreenRenderer):
295    
296          # Dimension stuff          # Dimension stuff
297          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
298          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
299    
300          # Page Frame          # Page Frame
301          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
302            
303          # Map Frame          # Map Frame
304          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
305          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
306            
307          # Legend Frame          # Legend Frame
308          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
309    
# Line 489  class ExportRenderer(ScreenRenderer): Line 311  class ExportRenderer(ScreenRenderer):
311          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
312                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
313    
314      def render_legend(self, map):      def render_legend(self):
315          """Render the legend on the Map."""          """Render the legend on the Map."""
316    
317          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 499  class ExportRenderer(ScreenRenderer): Line 321  class ExportRenderer(ScreenRenderer):
321    
322          # Dimension stuff          # Dimension stuff
323          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
324          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
325          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
326          iconwidth  = textheight          iconwidth  = textheight
327          iconheight = textheight          iconheight = textheight
328          stepy = textheight+3          stepy = textheight+3
329          dx = 10          dx = 10
330          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
331                                  # 5 pix inside legend frame                                  # 5 pix inside legend frame
332          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
333            
334          # Render the legend          # Render the legend
335          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
336          if map.HasLayers():          if self.map.HasLayers():
337              for l in map.Layers():              layers = self.map.Layers()[:]
338                layers.reverse()
339                for l in layers:
340                  if l.Visible():                  if l.Visible():
341                      # Render title                      # Render title
342                      dc.DrawText(l.Title(), posx, posy)                      dc.DrawText(l.Title(), posx, posy)
343                      posy+=stepy                      posy+=stepy
344                      # Render classification                      if l.HasClassification():
345                      clazz = l.GetClassification()                          # Render classification
346                      shapeType = l.ShapeType()                          clazz = l.GetClassification()
347                      for g in clazz:                          shapeType = l.ShapeType()
348                          if g.IsVisible():                          for g in clazz:
349                              previewer.Draw(dc,                              if g.IsVisible():
350                                  wxRect(posx+dx, posy, iconwidth, iconheight),                                  previewer.Draw(dc,
351                                  g.GetProperties(), shapeType)                                      wxRect(posx+dx, posy,
352                              dc.DrawText(g.GetDisplayText(),                                             iconwidth, iconheight),
353                                          posx+2*dx+iconwidth, posy)                                      g.GetProperties(), shapeType)
354                              posy+=stepy                                  dc.DrawText(g.GetDisplayText(),
355                                                        posx+2*dx+iconwidth, posy)
356      def render_scalebar(self, map):                                  posy+=stepy
357    
358        def render_scalebar(self):
359          """Render the scalebar."""          """Render the scalebar."""
360    
361          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
362    
363          # Dimension stuff          # Dimension stuff
364          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
365          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
366          
367          # Render the scalebar          # Render the scalebar
368          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
369                               (mmaxx+10+5, mmaxy-25),                               (mmaxx+10+5, mmaxy-25),
370                               ((width-15-5) - (mmaxx+10+5),20)                               ((width-15-5) - (mmaxx+10+5),20)
371                              )                              )
Legend:
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