/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1419 by bh, Tue Jul 15 09:29:18 2003 UTC revision 2537 by jonathan, Fri Jan 21 14:01:25 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
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 = lc.GetField()  
         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)  
102    
103      def draw_label_layer(self, layer):      def label_font(self):
104          scale = self.scale          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
105          offx, offy = self.offset                        wxNORMAL)
106    
107        def draw_raster_data(self, x,y, data, format = 'BMP', mask = None):
108            if format == 'RAW':
109                image = wxEmptyImage(data[0], data[1])
110                image.SetData(data[2])
111            else:
112                stream = cStringIO.StringIO(data[2])
113                image = wxImageFromStream(stream, raster_format_map[format])
114    
115          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          bitmap = wxBitmapFromImage(image)
         self.dc.SetFont(font)  
116    
117          map_proj = self.map.projection          if mask is None:
118          if map_proj is not None:              self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), False)
             forward = map_proj.Forward  
119          else:          else:
120              forward = None              # if we are given a mask object, try to pass it to SetMaskColour,
121                # otherwise assume it's a mask image
122          for label in layer.Labels():              try:
123              x = label.x                  bitmap.SetMaskColour(mask);
124              y = label.y                  self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
125              text = label.text              except (TypeError):
126              if forward:                  # implement using a mask image
127                  x, y = forward(x, y)                  raise NotImplementedError
             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)  
128    
129    
130  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
131    
132      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
133      honor_visibility = 1      honor_visibility = 1
134        
135      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
136          """Render the map.          """Render the map.
137    
138          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 140  class ScreenRenderer(MapRenderer):
140          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
141          selected_layer.          selected_layer.
142          """          """
         self.update_region = region  
143          self.selected_layer = selected_layer          self.selected_layer = selected_layer
144          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
145          self.render_map(map)          self.render_map()
146    
147      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
148          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)  
149    
150              for index in self.selected_shapes:          Only the given region (a tuple in window coordinates as returned
151                  func(renderparam, index, *args)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
152            shapes given by the ids in selected_shapes in the
153            selected_layer.
154            """
155            return self.render_map_incrementally()
156    
157        def draw_selection_incrementally(self, layer, selected_shapes):
158            """Draw the selected shapes in a emphasized way (i.e.
159            with a special pen and brush.
160            The drawing is performed incrementally, that means every
161            n shapes, the user can have interactions with the map.
162            n is currently fixed to 500.
163    
164            layer -- the layer where the shapes belong to.
165            selected_shapes -- a list of the shape-ids representing the
166                               selected shapes for the given layer.
167            """
168            pen = wxPen(wxBLACK, 3, wxSOLID)
169            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
170    
171            shapetype = layer.ShapeType()
172            useraw, func, param = self.low_level_renderer(layer)
173            args = (pen, brush)
174    
175            # for point shapes we need to find out the properties
176            # to determine the size. Based on table and field,
177            # we can find out the properties for object - see below.
178            if shapetype == SHAPETYPE_POINT:
179                lc = layer.GetClassification()
180                field = layer.GetClassificationColumn()
181                table = layer.ShapeStore().Table()
182    
183            count = 0
184            for index in selected_shapes:
185                count += 1
186                shape = layer.Shape(index)
187    
188                # Get the size of the specific property for this
189                # point
190                if shapetype == SHAPETYPE_POINT and field is not None:
191                    value = table.ReadValue(shape.ShapeID(), field)
192                    group = lc.FindGroup(value)
193                    size = group.GetProperties().GetSize()
194                    args = (pen, brush, size)
195    
196                if useraw:
197                    data = shape.RawData()
198                else:
199                    data = shape.Points()
200                func(param, data, *args)
201                if count % 500 == 0:
202                    yield True
203    
204      def layer_ids(self, layer):      def layer_shapes(self, layer):
205          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
206    
207          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 222  class ScreenRenderer(MapRenderer):
222          offx, offy = self.offset          offx, offy = self.offset
223          xs = []          xs = []
224          ys = []          ys = []
225          x, y, width, height = self.update_region          x, y, width, height = self.region
226          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
227                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
228              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 404  class ScreenRenderer(MapRenderer): Line 242  class ScreenRenderer(MapRenderer):
242  class ExportRenderer(ScreenRenderer):  class ExportRenderer(ScreenRenderer):
243    
244      honor_visibility = 1      honor_visibility = 1
245        
246      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
247                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
248    
249            In addition to all parameters of the the ScreenRender
250            constructor, this class requires and additional keyword argument
251            destination_region with a tuple (minx, miny, maxx, maxy) giving
252            the region in dc coordinates which is to contain the map.
253            """
254            self.destination_region = kw["destination_region"]
255            del kw["destination_region"]
256            ScreenRenderer.__init__(self, *args, **kw)
257    
258        def RenderMap(self, selected_layer, selected_shapes):
259          """Render the map.          """Render the map.
260    
261          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
262          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
263                    Thuban.UI.viewport.output_transform().
264    
265          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
266          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
267          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
268          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
269            available for map display.
270          """          """
271            
         self.update_region = region  
272          self.selected_layer = selected_layer          self.selected_layer = selected_layer
273          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
274    
275          # Get some dimensions          # Get some dimensions
276          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
277          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
278    
279          # Manipulate the offset to position the map          # Manipulate the offset to position the map
280          offx, offy = self.offset          offx, offy = self.offset
281          # 1. Shift to corner of map drawing area          # 1. Shift to corner of map drawing area
282          offx = offx + mminx          offx = offx + mminx
283          offy = offy + mminy          offy = offy + mminy
284    
285          # 2. Center the map on the map drawing area:          # 2. Center the map on the map drawing area:
286          # region identifies the region on the canvas view:          # region identifies the region on the canvas view:
287          # center of map drawing area - half the size of region: rendering origin          # center of map drawing area - half the size of region: rendering origin
288          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
289          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
290    
291          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
292            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
293    
294          # Draw the map          # Draw the map
295          self.dc.BeginDrawing()          self.dc.BeginDrawing()
296          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
297          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
298                                    urx, ury)                                    urx, ury)
299          self.render_map(map)          self.render_map()
300          self.dc.EndDrawing()          self.dc.EndDrawing()
301    
302          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 457  class ExportRenderer(ScreenRenderer): Line 307  class ExportRenderer(ScreenRenderer):
307          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
308          self.dc.SetFont(font)          self.dc.SetFont(font)
309    
310          self.render_frame(region)          self.render_frame()
311          self.render_legend(map)          self.render_legend()
312          self.render_scalebar(map)          self.render_scalebar()
313          self.dc.EndDrawing()          self.dc.EndDrawing()
314    
315      def render_frame(self, region):      def render_frame(self):
316          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
317    
318          dc = self.dc          dc = self.dc
# Line 471  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    
326          # Page Frame          # Page Frame
327          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
328            
329          # Map Frame          # Map Frame
330          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
331          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
332            
333          # Legend Frame          # Legend Frame
334          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
335    
# Line 487  class ExportRenderer(ScreenRenderer): Line 337  class ExportRenderer(ScreenRenderer):
337          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
338                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
339    
340      def render_legend(self, map):      def render_legend(self):
341          """Render the legend on the Map."""          """Render the legend on the Map."""
342    
343          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 497  class ExportRenderer(ScreenRenderer): Line 347  class ExportRenderer(ScreenRenderer):
347    
348          # Dimension stuff          # Dimension stuff
349          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
350          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
351          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
352          iconwidth  = textheight          iconwidth  = textheight
353          iconheight = textheight          iconheight = textheight
354          stepy = textheight+3          stepy = textheight+3
355          dx = 10          dx = 10
356          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
357                                  # 5 pix inside legend frame                                  # 5 pix inside legend frame
358          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
359            
360          # Render the legend          # Render the legend
361          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
362          if map.HasLayers():          if self.map.HasLayers():
363              layers = map.Layers()              layers = self.map.Layers()[:]
364              layers.reverse()              layers.reverse()
365              for l in layers:              for l in layers:
366                  if l.Visible():                  if l.Visible():
# Line 523  class ExportRenderer(ScreenRenderer): Line 373  class ExportRenderer(ScreenRenderer):
373                          shapeType = l.ShapeType()                          shapeType = l.ShapeType()
374                          for g in clazz:                          for g in clazz:
375                              if g.IsVisible():                              if g.IsVisible():
376                                  previewer.Draw(dc,                                  previewer.Draw(dc,
377                                      wxRect(posx+dx, posy,                                      wxRect(posx+dx, posy,
378                                             iconwidth, iconheight),                                             iconwidth, iconheight),
379                                      g.GetProperties(), shapeType)                                      g.GetProperties(), shapeType)
380                                  dc.DrawText(g.GetDisplayText(),                                  dc.DrawText(g.GetDisplayText(),
381                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
382                                  posy+=stepy                                  posy+=stepy
383            
384      def render_scalebar(self, map):      def render_scalebar(self):
385          """Render the scalebar."""          """Render the scalebar."""
386    
387          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
388    
389          # Dimension stuff          # Dimension stuff
390          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
391          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
392          
393          # Render the scalebar          # Render the scalebar
394          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
395                               (mmaxx+10+5, mmaxy-25),                               (mmaxx+10+5, mmaxy-25),
396                               ((width-15-5) - (mmaxx+10+5),20)                               ((width-15-5) - (mmaxx+10+5),20)
397                              )                              )
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