/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 686 by bh, Wed Apr 16 13:22:25 2003 UTC revision 2712 by bernhard, Sun Oct 15 23:27:05 2006 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001-2006 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]> (2003)
6    # Jan-Oliver Wagner <[email protected]> (2003-2005)
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  from wxPython.wx import wxPoint, wxPen, wxBrush, wxFont, \  import cStringIO
      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \  
      wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL  
18    
19  from wxproj import draw_polygon_shape, draw_polygon_init  import array
20    
21    import traceback
22    
23  from Thuban import _  from Thuban import _
 from Thuban.UI.common import *  
24    
25  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  import wx
      SHAPETYPE_POINT  
 from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \  
      ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE  
26    
27  from Thuban.Model.classification import Classification  from wxproj import draw_polygon_shape, draw_polygon_init
 from Thuban.Model.color import Color  
28    
29    from Thuban.UI.common import Color2wxColour
30    from Thuban.UI.classifier import ClassDataPreviewer
31    from Thuban.UI.scalebar import ScaleBar
32    
33  class MapRenderer:  from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
34         SHAPETYPE_POINT, RAW_SHAPEFILE
35    
36      """Class to render a map onto a wxDC"""  from Thuban.Model.color import Transparent
37    import Thuban.Model.resource
38    
39      honor_visibility = 1  from baserenderer import BaseRenderer
40    
41      def __init__(self, dc, scale, offset, resolution = 72.0,  from math import floor
                  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  
42    
43          assert scale > 0  from types import StringType
44    
45          self.dc = dc  from Thuban.version import versions
         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  
         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():  
                 self.draw_shape_layer(layer)  
         self.draw_label_layer(map.LabelLayer())  
46    
47      def draw_shape_layer(self, layer):  if Thuban.Model.resource.has_gdal_support():
48          scale = self.scale      from gdalwarp import ProjectRasterFile
         offx, offy = self.offset  
49    
50          map_proj = self.map.projection  verbose = 0 # whether to talk more on stdout
         layer_proj = layer.projection  
   
         shapetype = layer.ShapeType()  
51    
52          brush = wxTRANSPARENT_BRUSH  # Map the strings used for the format parameter of the draw_raster_data
53          pen   = wxTRANSPARENT_PEN  # method to the appropriate wxWindows constants
54    raster_format_map = {
55        "BMP": wx.BITMAP_TYPE_BMP,
56        "JPEG": wx.BITMAP_TYPE_JPEG,
57        "PNG": wx.BITMAP_TYPE_PNG,
58        "TIFF": wx.BITMAP_TYPE_TIF,
59        "GIF": wx.BITMAP_TYPE_GIF,
60        }
61    
62          old_prop = None  class MapRenderer(BaseRenderer):
         lc = layer.GetClassification()  
         field = lc.GetField()  
63    
64        """Class to render a map onto a wxDC"""
65    
66          if shapetype != SHAPETYPE_POINT:      TRANSPARENT_PEN = wx.TRANSPARENT_PEN
67              polygon_render_param = self.polygon_render_param(layer)      TRANSPARENT_BRUSH = wx.TRANSPARENT_BRUSH
   
         for i in self.layer_ids(layer):  
             value = None  
   
             if field is not None:  
                 try:  
                     record = layer.table.read_record(i)  
                     if record is not None:  
                         value = record[field]  
                 except:  
                     pass  
   
                 #  
                 # if the above statements fail 'value' should  
                 # be null, at which point this call will  
                 # at least retreive the NullData  
                 #  
68    
69                  group = lc.FindGroup(value)      def make_point(self, x, y):
70            return wx.Point(int(round(x)), int(round(y)))
71    
72                  #prop = lc.GetProperties(value)      def tools_for_property(self, prop):
73              else:          fill = prop.GetFill()
74                  group = lc.GetDefaultGroup()          if fill is Transparent:
75                brush = self.TRANSPARENT_BRUSH
76            else:
77                brush = wx.Brush(Color2wxColour(fill), wx.SOLID)
78    
79            stroke = prop.GetLineColor()
80            if stroke is Transparent:
81                pen = self.TRANSPARENT_PEN
82            else:
83                pen = wx.Pen(Color2wxColour(stroke), prop.GetLineWidth(), wx.SOLID)
84            return pen, brush
85    
86              if not group.IsVisible():      def low_level_renderer(self, layer):
87                  continue          """Override inherited method to provide more efficient renderers
88    
89              prop = group.GetProperties()          If the underlying data format is not a shapefile or the layer
90            contains points shapes, simply use what the inherited method
91            returns.
92    
93            Otherwise, i.e. for arc and polygon use the more efficient
94            wxproj.draw_polygon_shape and its corresponding parameter
95            created with wxproj.draw_polygon_init.
96            """
97            if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
98                and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
99                offx, offy = self.offset
100                x = lambda a, b, c, d: None
101                #return (True, x, None)
102                return (True, draw_polygon_shape,
103                        draw_polygon_init(layer.ShapeStore().Shapefile(),
104                                          self.dc, self.map.projection,
105                                          layer.projection,
106                                          self.scale, -self.scale, offx, offy))
107            else:
108                return BaseRenderer.low_level_renderer(self, layer)
109    
110              # don't recreate new objects if they are the same as before      def label_font(self):
111              if prop != old_prop:          return wx.Font(int(round(self.resolution * 10)), wx.SWISS, wx.NORMAL,
112                  old_prop = prop                        wx.NORMAL)
113    
114        def projected_raster_layer(self, layer, srcProj, dstProj, extents,
115                                   resolution, dimensions, options):
116            """Returns a raster layer image in projected space
117    
118                  if shapetype == SHAPETYPE_ARC:          Based on a given filename.  This method must be implemented in
119                      fill = Color.Transparent          classes derived from BaseRenderer.
120                  else:          """
                     fill = prop.GetFill()  
121    
122            ret = None
123    
124                  if fill is Color.Transparent:          if Thuban.Model.resource.has_gdal_support():
                     brush = wxTRANSPARENT_BRUSH  
                 else:  
                     color = Color2wxColour(fill)  
                     brush = wxBrush(color, wxSOLID)  
125    
126                  stroke = prop.GetLineColor()              if versions['wxPython-tuple'] < (2,5,3):
127                  stroke_width = prop.GetLineWidth()                  options = options | 4  # INVERT_MASK_BITS
128                  if stroke is Color.Transparent:                  options = options & ~2 # ALPHA_MASK not supported
129                      pen = wxTRANSPARENT_PEN  
130                  else:              try:
131                      color = Color2wxColour(stroke)                  if verbose > 0:
132                      pen = wxPen(color, stroke_width, wxSOLID)                      print "doing ProjectRasterFile '%s' -> '%s'" % \
133                                    (srcProj, dstProj)
134                        print "extents:", extents, "resolution:", resolution
135                        print "dimensions:", dimensions, "options:", options
136                    ret = ProjectRasterFile(layer.GetImageFilename(),
137                                            srcProj, dstProj,
138                                            extents, resolution, dimensions,
139                                            options)
140                except (MemoryError, IOError, AttributeError, ValueError):
141                    # Why does this catch AttributeError and ValueError?
142                    # FIXME: The exception should be communicated to the user
143                    # better.
144                    traceback.print_exc()
145    
146            return ret
147    
148        def draw_raster_data(self, x,y, data, format = 'BMP', opacity=1.0):
149    
150            mask = None
151            alpha = None
152            width = data[0]
153            height = data[1]
154            image_data, mask_data, alpha_data = data[2]
155    
156            if versions['wxPython-tuple'] < (2,5,3):
157                alpha_data = None
158    
159            if format == 'RAW':
160                image = wx.EmptyImage(width, height)
161                image.SetData(image_data)
162                if mask_data is not None:
163                    mask = wx.BitmapFromBits(mask_data, width, height, 1)
164                    mask = wx.Mask(mask)
165                elif alpha_data is not None:
166                    # alpha_data is already in the right format
167                    alpha = alpha_data
168    
169            else:
170                stream = cStringIO.StringIO(image_data)
171                image = wx.ImageFromStream(stream, raster_format_map[format])
172    
173              if shapetype == SHAPETYPE_POINT:              if mask_data is not None:
174                  self.dc.SetBrush(brush)                  stream = cStringIO.StringIO(mask_data)
175                  self.dc.SetPen(pen)                  mask = wx.ImageFromStream(stream, raster_format_map[format])
176                  self.draw_point_shape(layer, i)                  mask = wx.Mask(wx.BitmapFromImage(mask, 1))
177                elif alpha_data is not None:
178                    stream = cStringIO.StringIO(alpha_data)
179                    alpha = wx.ImageFromStream(stream, raster_format_map[format])
180                    alpha = alpha.GetData() #[:] # XXX: do we need to copy this?
181                elif image.HasAlpha():
182                    alpha = image.GetAlphaData()
183    
184            #
185            # scale down the alpha values the opacity level using a string
186            # translation table for efficiency.
187            #
188            if alpha is not None:
189                if opacity == 0:
190                    return
191                elif opacity == 1:
192                    a = alpha
193              else:              else:
194                  self.draw_polygon_shape(polygon_render_param, i, pen, brush)                  tr = [int(i*opacity) for i in range(256)]
195                    table = array.array('B', tr).tostring()
196      def layer_ids(self, layer):                  a = alpha.translate(table)
         """Return the shape ids of the given layer that have to be drawn.  
   
         The default implementation simply returns all ids in the layer.  
         Override in derived classes to be more precise.  
         """  
         return range(layer.NumShapes())  
   
     def polygon_render_param(self, layer):  
         """Return the low-lever render parameter for the layer"""  
         offx, offy = self.offset  
         return draw_polygon_init(layer.shapefile, self.dc,  
                                  self.map.projection,  
                                  layer.projection,  
                                  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.projection  
         if proj is not None:  
             forward = proj.Forward  
         else:  
             forward = None  
         proj = layer.projection  
         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)  
197    
198      def draw_label_layer(self, layer):              image.SetAlphaData(a)
         scale = self.scale  
         offx, offy = self.offset  
199    
200          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          bitmap = wx.BitmapFromImage(image)
         self.dc.SetFont(font)  
201    
202          map_proj = self.map.projection          if mask is not None:
203          if map_proj is not None:              bitmap.SetMask(mask)
             forward = map_proj.Forward  
         else:  
             forward = None  
204    
205          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)  
206    
207    
208  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
209    
210      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
211      honor_visibility = 1      honor_visibility = 1
212        
213      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
214          """Render the map.          """Render the map.
215    
216          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 259  class ScreenRenderer(MapRenderer): Line 218  class ScreenRenderer(MapRenderer):
218          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
219          selected_layer.          selected_layer.
220          """          """
         self.update_region = region  
221          self.selected_layer = selected_layer          self.selected_layer = selected_layer
222          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
223          self.render_map(map)          self.render_map()
224    
225      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
226          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)  
227    
228              for index in self.selected_shapes:          Only the given region (a tuple in window coordinates as returned
229                  func(renderparam, index, *args)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
230            shapes given by the ids in selected_shapes in the
231            selected_layer.
232            """
233            return self.render_map_incrementally()
234    
235        def draw_selection_incrementally(self, layer, selected_shapes):
236            """Draw the selected shapes in a emphasized way (i.e.
237            with a special pen and brush.
238            The drawing is performed incrementally, that means every
239            n shapes, the user can have interactions with the map.
240            n is currently fixed to 500.
241    
242            layer -- the layer where the shapes belong to.
243            selected_shapes -- a list of the shape-ids representing the
244                               selected shapes for the given layer.
245            """
246            pen = wx.Pen(wx.BLACK, 3, wx.SOLID)
247            brush = wx.Brush(wx.BLACK, wx.CROSS_HATCH)
248    
249            shapetype = layer.ShapeType()
250            useraw, func, param = self.low_level_renderer(layer)
251            args = (pen, brush)
252    
253            # for point shapes we need to find out the properties
254            # to determine the size. Based on table and field,
255            # we can find out the properties for object - see below.
256            if shapetype == SHAPETYPE_POINT:
257                lc = layer.GetClassification()
258                field = layer.GetClassificationColumn()
259                table = layer.ShapeStore().Table()
260    
261            count = 0
262            for index in selected_shapes:
263                count += 1
264                shape = layer.Shape(index)
265    
266                # Get the size of the specific property for this
267                # point
268                if shapetype == SHAPETYPE_POINT:
269                    if field is not None:
270                        value = table.ReadValue(shape.ShapeID(), field)
271                        group = lc.FindGroup(value)
272                        size = group.GetProperties().GetSize()
273                    else:
274                        size = lc.GetDefaultGroup().GetProperties().GetSize()
275                    args = (pen, brush, size)
276    
277                if useraw:
278                    data = shape.RawData()
279                else:
280                    data = shape.Points()
281                func(param, data, *args)
282                if count % 500 == 0:
283                    yield True
284    
285      def layer_ids(self, layer):      def layer_shapes(self, layer):
286          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
287    
288          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 314  class ScreenRenderer(MapRenderer): Line 303  class ScreenRenderer(MapRenderer):
303          offx, offy = self.offset          offx, offy = self.offset
304          xs = []          xs = []
305          ys = []          ys = []
306          x, y, width, height = self.update_region          x, y, width, height = self.region
307          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
308                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
309              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 331  class ScreenRenderer(MapRenderer): Line 320  class ScreenRenderer(MapRenderer):
320          return layer.ShapesInRegion((left, bottom, right, top))          return layer.ShapesInRegion((left, bottom, right, top))
321    
322    
323  class PrinterRender(MapRenderer):  class ExportRenderer(ScreenRenderer):
324    
325        honor_visibility = 1
326    
327        def __init__(self, *args, **kw):
328            """Initialize the ExportRenderer.
329    
330            In addition to all parameters of the the ScreenRender
331            constructor, this class requires and additional keyword argument
332            destination_region with a tuple (minx, miny, maxx, maxy) giving
333            the region in dc coordinates which is to contain the map.
334            """
335            self.destination_region = kw["destination_region"]
336            del kw["destination_region"]
337            ScreenRenderer.__init__(self, *args, **kw)
338    
339      # When printing we want to see all layers      def RenderMap(self, selected_layer, selected_shapes):
340      honor_visibility = 0          """Render the map.
341    
342            The rendering device has been specified during initialisation.
343            The device border distance was set in
344            Thuban.UI.viewport.output_transform().
345    
346            RenderMap renders a frame set (one page frame, one around
347            legend/scalebar and one around the map), the map, the legend and
348            the scalebar on the given DC. The map is rendered with the
349            region displayed in the canvas view, centered on the area
350            available for map display.
351            """
352    
353            self.selected_layer = selected_layer
354            self.selected_shapes = selected_shapes
355    
356            # Get some dimensions
357            llx, lly, urx, ury = self.region
358            mminx, mminy, mmaxx, mmaxy = self.destination_region
359    
360            # Manipulate the offset to position the map
361            offx, offy = self.offset
362            # 1. Shift to corner of map drawing area
363            offx = offx + mminx
364            offy = offy + mminy
365    
366            # 2. Center the map on the map drawing area:
367            # region identifies the region on the canvas view:
368            # center of map drawing area - half the size of region: rendering origin
369            self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
370            self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
371    
372            self.offset = (offx+self.shiftx, offy+self.shifty)
373            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
374    
375            # Draw the map
376            self.dc.BeginDrawing()
377            self.dc.DestroyClippingRegion()
378            self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
379                                      urx, ury)
380            self.render_map()
381            self.dc.EndDrawing()
382    
383            # Draw the rest (frames, legend, scalebar)
384            self.dc.BeginDrawing()
385            self.dc.DestroyClippingRegion()
386    
387            # Force the font for Legend drawing
388            font = wx.Font(self.resolution * 10, wx.SWISS, wx.NORMAL, wx.NORMAL)
389            self.dc.SetFont(font)
390    
391            self.render_frame()
392            self.render_legend()
393            self.render_scalebar()
394            self.dc.EndDrawing()
395    
396        def render_frame(self):
397            """Render the frames for map and legend/scalebar."""
398    
399            dc = self.dc
400            dc.SetPen(wx.BLACK_PEN)
401            dc.SetBrush(wx.TRANSPARENT_BRUSH)
402    
403            # Dimension stuff
404            width, height = dc.GetSizeTuple()
405            mminx, mminy, mmaxx, mmaxy = self.destination_region
406    
407            # Page Frame
408            dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
409    
410            # Map Frame
411            llx, lly, urx, ury = self.region
412            dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
413    
414            # Legend Frame
415            dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
416    
417            dc.DestroyClippingRegion()
418            dc.SetClippingRegion(mmaxx+10,mminy,
419                                 (width-20) - (mmaxx+10), mmaxy-mminy)
420    
421        def render_legend(self):
422            """Render the legend on the Map."""
423    
424            previewer = ClassDataPreviewer()
425            dc = self.dc
426            dc.SetPen(wx.BLACK_PEN)
427            dc.SetBrush(wx.TRANSPARENT_BRUSH)
428    
429            # Dimension stuff
430            width, height = dc.GetSizeTuple()
431            mminx, mminy, mmaxx, mmaxy = self.destination_region
432            textwidth, textheight = dc.GetTextExtent("0")
433            iconwidth  = textheight
434            iconheight = textheight
435            stepy = textheight+3
436            dx = 10
437            posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
438                                    # 5 pix inside legend frame
439            posy = mminy + 5        # 5 pix inside legend frame
440    
441            # Render the legend
442            dc.SetTextForeground(wx.BLACK)
443            if self.map.HasLayers():
444                layers = self.map.Layers()[:]
445                layers.reverse()
446                for l in layers:
447                    if l.Visible():
448                        # Render title
449                        dc.DrawText(l.Title(), posx, posy)
450                        posy+=stepy
451                        if l.HasClassification():
452                            # Render classification
453                            clazz = l.GetClassification()
454                            shapeType = l.ShapeType()
455                            for g in clazz:
456                                if g.IsVisible():
457                                    previewer.Draw(dc,
458                                        wx.Rect(posx+dx, posy,
459                                               iconwidth, iconheight),
460                                        g.GetProperties(), shapeType)
461                                    dc.DrawText(g.GetDisplayText(),
462                                                posx+2*dx+iconwidth, posy)
463                                    posy+=stepy
464    
465        def render_scalebar(self):
466            """Render the scalebar."""
467    
468            scalebar = ScaleBar(self.map)
469    
470            # Dimension stuff
471            width, height = self.dc.GetSizeTuple()
472            mminx, mminy, mmaxx, mmaxy = self.destination_region
473    
474            # Render the scalebar
475            scalebar.DrawScaleBar(self.scale, self.dc,
476                                 (mmaxx+10+5, mmaxy-25),
477                                 ((width-15-5) - (mmaxx+10+5),20)
478                                )
479            # 10 pix between map and legend frame, 5 pix inside legend frame
480            # 25 pix from the legend frame bottom line
481            # Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
482            # Height: 20
483    
484    class PrinterRenderer(ExportRenderer):
485    
486        # Printing as well as Export / Screen display only the visible layer.
487        honor_visibility = 1
488    
     RenderMap = MapRenderer.render_map  
       
Legend:
Removed from v.686  
changed lines
  Added in v.2712
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