/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1434 by jonathan, Wed Jul 16 13:24:39 2003 UTC revision 2552 by jonathan, Fri Jan 28 15:54:00 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    
 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  
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    
     def draw_shape_layer(self, layer):  
         scale = self.scale  
         offx, offy = self.offset  
46    
47          map_proj = self.map.projection  # Map the strings used for the format parameter of the draw_raster_data
48          layer_proj = layer.projection  # method to the appropriate wxWindows constants
49    raster_format_map = {
50        "BMP": wxBITMAP_TYPE_BMP,
51        "JPEG": wxBITMAP_TYPE_JPEG,
52        "PNG": wxBITMAP_TYPE_PNG,
53        "TIFF": wxBITMAP_TYPE_TIF,
54        "GIF": wxBITMAP_TYPE_GIF,
55        }
56    
57          shapetype = layer.ShapeType()  class MapRenderer(BaseRenderer):
58    
59          brush = wxTRANSPARENT_BRUSH      """Class to render a map onto a wxDC"""
         pen   = wxTRANSPARENT_PEN  
60    
61          old_prop = None      TRANSPARENT_PEN = wxTRANSPARENT_PEN
62          old_group = None      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
         lc = layer.GetClassification()  
         field = layer.GetClassificationField()  
         defaultGroup = lc.GetDefaultGroup()  
63    
64        def make_point(self, x, y):
65            return wxPoint(int(round(x)), int(round(y)))
66    
67          if shapetype == SHAPETYPE_POINT:      def tools_for_property(self, prop):
68              draw_func = self.draw_point_shape          fill = prop.GetFill()
69              draw_func_param = layer          if fill is Transparent:
70                brush = self.TRANSPARENT_BRUSH
71          else:          else:
72              draw_func = draw_polygon_shape              brush = wxBrush(Color2wxColour(fill), wxSOLID)
             draw_func_param = self.polygon_render_param(layer)  
   
         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  
73    
74                  prop = group.GetProperties()          stroke = prop.GetLineColor()
75            if stroke is Transparent:
76                  if prop != old_prop:              pen = self.TRANSPARENT_PEN
                     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  
77          else:          else:
78              if data is not None:              pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
79                  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()  
80    
81      def layer_ids(self, layer):      def low_level_renderer(self, layer):
82          """Return the shape ids of the given layer that have to be drawn.          """Override inherited method to provide more efficient renderers
83    
84          The default implementation simply returns all ids in the layer.          If the underlying data format is not a shapefile or the layer
85          Override in derived classes to be more precise.          contains points shapes, simply use what the inherited method
86            returns.
87    
88            Otherwise, i.e. for arc and polygon use the more efficient
89            wxproj.draw_polygon_shape and its corresponding parameter
90            created with wxproj.draw_polygon_init.
91          """          """
92          return range(layer.NumShapes())          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
93                and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
94      def polygon_render_param(self, layer):              offx, offy = self.offset
95          """Return the low-lever render parameter for the layer"""              return (True, draw_polygon_shape,
96          offx, offy = self.offset                      draw_polygon_init(layer.ShapeStore().Shapefile(),
97          return draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,                                        self.dc, self.map.projection,
98                                   self.map.projection,                                        layer.projection,
99                                   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  
100          else:          else:
101              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, 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)  
   
     def draw_label_layer(self, layer):  
         scale = self.scale  
         offx, offy = self.offset  
   
         font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)  
         self.dc.SetFont(font)  
102    
103          map_proj = self.map.projection      def label_font(self):
104          if map_proj is not None:          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
105              forward = map_proj.Forward                        wxNORMAL)
106    
107        def draw_raster_data(self, x,y, data, format = 'BMP'):
108    
109            mask = None
110    
111            if format == 'RAW':
112                image = wxEmptyImage(data[0], data[1])
113                image.SetData(data[2][0])
114                if data[2][1] is not None:
115                    mask = wxBitmapFromBits(data[2][1], data[0], data[1], 1)
116                    mask = wxMask(mask)
117          else:          else:
118              forward = None              stream = cStringIO.StringIO(data[2][0])
119                image = wxImageFromStream(stream, raster_format_map[format])
120                if data[2][1] is not None:
121                    stream = cStringIO.StringIO(data[2][1])
122                    mask = wxImageFromStream(stream, raster_format_map[format])
123                    mask = wxMask(wxBitmapFromImage(mask, 1))
124    
125            bitmap = wxBitmapFromImage(image)
126            bitmap.SetMask(mask)
127    
128          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)  
129    
130    
131  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
132    
133      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
134      honor_visibility = 1      honor_visibility = 1
135        
136      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
137          """Render the map.          """Render the map.
138    
139          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 141  class ScreenRenderer(MapRenderer):
141          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
142          selected_layer.          selected_layer.
143          """          """
         self.update_region = region  
144          self.selected_layer = selected_layer          self.selected_layer = selected_layer
145          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
146          self.render_map(map)          self.render_map()
147    
148      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
149          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)  
150    
151              for index in self.selected_shapes:          Only the given region (a tuple in window coordinates as returned
152                  func(renderparam, index, *args)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
153            shapes given by the ids in selected_shapes in the
154            selected_layer.
155            """
156            return self.render_map_incrementally()
157    
158        def draw_selection_incrementally(self, layer, selected_shapes):
159            """Draw the selected shapes in a emphasized way (i.e.
160            with a special pen and brush.
161            The drawing is performed incrementally, that means every
162            n shapes, the user can have interactions with the map.
163            n is currently fixed to 500.
164    
165            layer -- the layer where the shapes belong to.
166            selected_shapes -- a list of the shape-ids representing the
167                               selected shapes for the given layer.
168            """
169            pen = wxPen(wxBLACK, 3, wxSOLID)
170            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
171    
172            shapetype = layer.ShapeType()
173            useraw, func, param = self.low_level_renderer(layer)
174            args = (pen, brush)
175    
176            # for point shapes we need to find out the properties
177            # to determine the size. Based on table and field,
178            # we can find out the properties for object - see below.
179            if shapetype == SHAPETYPE_POINT:
180                lc = layer.GetClassification()
181                field = layer.GetClassificationColumn()
182                table = layer.ShapeStore().Table()
183    
184            count = 0
185            for index in selected_shapes:
186                count += 1
187                shape = layer.Shape(index)
188    
189                # Get the size of the specific property for this
190                # point
191                if shapetype == SHAPETYPE_POINT and field is not None:
192                    value = table.ReadValue(shape.ShapeID(), field)
193                    group = lc.FindGroup(value)
194                    size = group.GetProperties().GetSize()
195                    args = (pen, brush, size)
196    
197                if useraw:
198                    data = shape.RawData()
199                else:
200                    data = shape.Points()
201                func(param, data, *args)
202                if count % 500 == 0:
203                    yield True
204    
205      def layer_ids(self, layer):      def layer_shapes(self, layer):
206          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
207    
208          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 384  class ScreenRenderer(MapRenderer): Line 223  class ScreenRenderer(MapRenderer):
223          offx, offy = self.offset          offx, offy = self.offset
224          xs = []          xs = []
225          ys = []          ys = []
226          x, y, width, height = self.update_region          x, y, width, height = self.region
227          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
228                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
229              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 404  class ScreenRenderer(MapRenderer): Line 243  class ScreenRenderer(MapRenderer):
243  class ExportRenderer(ScreenRenderer):  class ExportRenderer(ScreenRenderer):
244    
245      honor_visibility = 1      honor_visibility = 1
246        
247      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
248                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
249    
250            In addition to all parameters of the the ScreenRender
251            constructor, this class requires and additional keyword argument
252            destination_region with a tuple (minx, miny, maxx, maxy) giving
253            the region in dc coordinates which is to contain the map.
254            """
255            self.destination_region = kw["destination_region"]
256            del kw["destination_region"]
257            ScreenRenderer.__init__(self, *args, **kw)
258    
259        def RenderMap(self, selected_layer, selected_shapes):
260          """Render the map.          """Render the map.
261    
262          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
263          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
264                    Thuban.UI.viewport.output_transform().
265    
266          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
267          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
268          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
269          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
270            available for map display.
271          """          """
272            
         self.update_region = region  
273          self.selected_layer = selected_layer          self.selected_layer = selected_layer
274          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
275    
276          # Get some dimensions          # Get some dimensions
277          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
278          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
279    
280          # Manipulate the offset to position the map          # Manipulate the offset to position the map
281          offx, offy = self.offset          offx, offy = self.offset
282          # 1. Shift to corner of map drawing area          # 1. Shift to corner of map drawing area
283          offx = offx + mminx          offx = offx + mminx
284          offy = offy + mminy          offy = offy + mminy
285    
286          # 2. Center the map on the map drawing area:          # 2. Center the map on the map drawing area:
287          # region identifies the region on the canvas view:          # region identifies the region on the canvas view:
288          # center of map drawing area - half the size of region: rendering origin          # center of map drawing area - half the size of region: rendering origin
289          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
290          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
291    
292          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
293            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
294    
295          # Draw the map          # Draw the map
296          self.dc.BeginDrawing()          self.dc.BeginDrawing()
297          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
298          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
299                                    urx, ury)                                    urx, ury)
300          self.render_map(map)          self.render_map()
301          self.dc.EndDrawing()          self.dc.EndDrawing()
302    
303          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 457  class ExportRenderer(ScreenRenderer): Line 308  class ExportRenderer(ScreenRenderer):
308          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
309          self.dc.SetFont(font)          self.dc.SetFont(font)
310    
311          self.render_frame(region)          self.render_frame()
312          self.render_legend(map)          self.render_legend()
313          self.render_scalebar(map)          self.render_scalebar()
314          self.dc.EndDrawing()          self.dc.EndDrawing()
315    
316      def render_frame(self, region):      def render_frame(self):
317          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
318    
319          dc = self.dc          dc = self.dc
# Line 471  class ExportRenderer(ScreenRenderer): Line 322  class ExportRenderer(ScreenRenderer):
322    
323          # Dimension stuff          # Dimension stuff
324          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
325          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
326    
327          # Page Frame          # Page Frame
328          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
329            
330          # Map Frame          # Map Frame
331          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
332          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
333            
334          # Legend Frame          # Legend Frame
335          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
336    
# Line 487  class ExportRenderer(ScreenRenderer): Line 338  class ExportRenderer(ScreenRenderer):
338          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
339                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
340    
341      def render_legend(self, map):      def render_legend(self):
342          """Render the legend on the Map."""          """Render the legend on the Map."""
343    
344          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 497  class ExportRenderer(ScreenRenderer): Line 348  class ExportRenderer(ScreenRenderer):
348    
349          # Dimension stuff          # Dimension stuff
350          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
351          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
352          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
353          iconwidth  = textheight          iconwidth  = textheight
354          iconheight = textheight          iconheight = textheight
355          stepy = textheight+3          stepy = textheight+3
356          dx = 10          dx = 10
357          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
358                                  # 5 pix inside legend frame                                  # 5 pix inside legend frame
359          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
360            
361          # Render the legend          # Render the legend
362          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
363          if map.HasLayers():          if self.map.HasLayers():
364              layers = map.Layers()              layers = self.map.Layers()[:]
365              layers.reverse()              layers.reverse()
366              for l in layers:              for l in layers:
367                  if l.Visible():                  if l.Visible():
# Line 523  class ExportRenderer(ScreenRenderer): Line 374  class ExportRenderer(ScreenRenderer):
374                          shapeType = l.ShapeType()                          shapeType = l.ShapeType()
375                          for g in clazz:                          for g in clazz:
376                              if g.IsVisible():                              if g.IsVisible():
377                                  previewer.Draw(dc,                                  previewer.Draw(dc,
378                                      wxRect(posx+dx, posy,                                      wxRect(posx+dx, posy,
379                                             iconwidth, iconheight),                                             iconwidth, iconheight),
380                                      g.GetProperties(), shapeType)                                      g.GetProperties(), shapeType)
381                                  dc.DrawText(g.GetDisplayText(),                                  dc.DrawText(g.GetDisplayText(),
382                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
383                                  posy+=stepy                                  posy+=stepy
384            
385      def render_scalebar(self, map):      def render_scalebar(self):
386          """Render the scalebar."""          """Render the scalebar."""
387    
388          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
389    
390          # Dimension stuff          # Dimension stuff
391          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
392          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
393          
394          # Render the scalebar          # Render the scalebar
395          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
396                               (mmaxx+10+5, mmaxy-25),                               (mmaxx+10+5, mmaxy-25),
397                               ((width-15-5) - (mmaxx+10+5),20)                               ((width-15-5) - (mmaxx+10+5),20)
398                              )                              )
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