/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 535 by bh, Fri Mar 14 20:42:18 2003 UTC revision 2601 by joey, Sat Apr 23 16:40:33 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]> (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
18    
19  from wxPython.wx import wxPoint, wxPen, wxBrush, wxFont, \  import array
      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \  
      wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL  
20    
21  from wxproj import draw_polygon_shape  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, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
26       SHAPETYPE_POINT      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
27  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
28       ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
29        wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
30        wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits
31    
32  from Thuban.Model.classification import Classification  from wxproj import draw_polygon_shape, draw_polygon_init
 from Thuban.Model.color import Color  
33    
34    from Thuban.UI.common import Color2wxColour
35    from Thuban.UI.classifier import ClassDataPreviewer
36    from Thuban.UI.scalebar import ScaleBar
37    
38  class MapRenderer:  from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
39         SHAPETYPE_POINT, RAW_SHAPEFILE
40    
41      """Class to render a map onto a wxDC"""  from Thuban.Model.color import Transparent
42    import Thuban.Model.resource
43    
44      honor_visibility = 1  from baserenderer import BaseRenderer
45    
46      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  
         self.dc = dc  
         self.scale = scale  
         self.offset = offset  
         if honor_visibility is not None:  
             self.honor_visibility = honor_visibility  
         # store the resolution in pixel/point because it's more useful  
         # later.  
         self.resolution = resolution / 72.0  
   
     def render_map(self, map):  
         self.map = map  
         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())  
47    
48      def draw_shape_layer(self, layer):  from types import StringType
         scale = self.scale  
         offx, offy = self.offset  
49    
50          map_proj = self.map.projection  from Thuban.version import versions
         layer_proj = layer.projection  
51    
52          shapetype = layer.ShapeType()  if Thuban.Model.resource.has_gdal_support():
53        from gdalwarp import ProjectRasterFile
54    
         brush = wxTRANSPARENT_BRUSH  
         pen   = wxTRANSPARENT_PEN  
55    
56          old_prop = None  # Map the strings used for the format parameter of the draw_raster_data
57          lc = layer.GetClassification()  # method to the appropriate wxWindows constants
58          field = lc.GetField()  raster_format_map = {
59        "BMP": wxBITMAP_TYPE_BMP,
60          defaultProps = lc.GetDefaultGroup().GetProperties()      "JPEG": wxBITMAP_TYPE_JPEG,
61        "PNG": wxBITMAP_TYPE_PNG,
62          for i in self.layer_ids(layer):      "TIFF": wxBITMAP_TYPE_TIF,
63              value = None      "GIF": wxBITMAP_TYPE_GIF,
64        }
             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  
                 #  
                 prop = lc.GetProperties(value)  
             else:  
                 prop = defaultProps  
65    
66              # don't recreate new objects if they are the same as before  class MapRenderer(BaseRenderer):
             if prop != old_prop:  
                 old_prop = prop  
   
                 if shapetype == SHAPETYPE_ARC:  
                     fill = Color.None  
                 else:  
                     fill = prop.GetFill()  
       
                 if fill is Color.None:  
                     brush = wxTRANSPARENT_BRUSH  
                 else:  
                     color = Color2wxColour(fill)  
                     brush = wxBrush(color, wxSOLID)  
       
                 stroke = prop.GetLineColor()  
                 stroke_width = prop.GetLineWidth()  
                 if stroke is Color.None:  
                     pen = wxTRANSPARENT_PEN  
                 else:  
                     color = Color2wxColour(stroke)  
                     pen = wxPen(color, stroke_width, wxSOLID)  
       
             if shapetype == SHAPETYPE_POINT:  
                 self.dc.SetBrush(brush)  
                 self.dc.SetPen(pen)  
                 self.draw_point_shape(layer, i)  
             else:  
                 self.draw_polygon_shape(layer, i, pen, brush)  
67    
68      def layer_ids(self, layer):      """Class to render a map onto a wxDC"""
         """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())  
69    
70      def draw_polygon_shape(self, layer, index, pen, brush):      TRANSPARENT_PEN = wxTRANSPARENT_PEN
71          offx, offy = self.offset              TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
         draw_polygon_shape(layer.shapefile.cobject(), index,  
                            self.dc, pen, brush,  
                            self.map.projection, layer.projection,  
                            self.scale, -self.scale, offx, offy)  
72    
73      def projected_points(self, layer, index):      def make_point(self, x, y):
74          proj = self.map.projection          return wxPoint(int(round(x)), int(round(y)))
75          if proj is not None:  
76              forward = proj.Forward      def tools_for_property(self, prop):
77            fill = prop.GetFill()
78            if fill is Transparent:
79                brush = self.TRANSPARENT_BRUSH
80          else:          else:
81              forward = None              brush = wxBrush(Color2wxColour(fill), wxSOLID)
82          proj = layer.projection  
83          if proj is not None:          stroke = prop.GetLineColor()
84              inverse = proj.Inverse          if stroke is Transparent:
85                pen = self.TRANSPARENT_PEN
86          else:          else:
87              inverse = None              pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
88          shape = layer.Shape(index)          return pen, brush
         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):  
         p = self.projected_points(layer, index)[0]  
         radius = self.resolution * 5  
         self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)  
89    
90      def draw_label_layer(self, layer):      def low_level_renderer(self, layer):
91          scale = self.scale          """Override inherited method to provide more efficient renderers
         offx, offy = self.offset  
92    
93          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          If the underlying data format is not a shapefile or the layer
94          self.dc.SetFont(font)          contains points shapes, simply use what the inherited method
95            returns.
96    
97            Otherwise, i.e. for arc and polygon use the more efficient
98            wxproj.draw_polygon_shape and its corresponding parameter
99            created with wxproj.draw_polygon_init.
100            """
101            if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
102                and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
103                offx, offy = self.offset
104                x = lambda a, b, c, d: None
105                #return (True, x, None)
106                return (True, draw_polygon_shape,
107                        draw_polygon_init(layer.ShapeStore().Shapefile(),
108                                          self.dc, self.map.projection,
109                                          layer.projection,
110                                          self.scale, -self.scale, offx, offy))
111            else:
112                return BaseRenderer.low_level_renderer(self, layer)
113    
114        def label_font(self):
115            return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
116                          wxNORMAL)
117    
118        def projected_raster_layer(self, layer, srcProj, dstProj, extents,
119                                   resolution, dimensions, options):
120    
121            ret = None
122    
123            if Thuban.Model.resource.has_gdal_support():
124    
125                if versions['wxPython-tuple'] < (2,5,3):
126                    options = options | 4  # INVERT_MASK_BITS
127                    options = options & ~2 # ALPHA_MASK not supported
128    
129                try:
130                    ret = ProjectRasterFile(layer.GetImageFilename(),
131                                            srcProj, dstProj,
132                                            extents, resolution, dimensions,
133                                            options)
134                except (MemoryError, IOError, AttributeError, ValueError):
135                    # Why does this catch AttributeError and ValueError?
136                    # FIXME: The exception should be communicated to the user
137                    # better.
138                    traceback.print_exc()
139    
140            return ret
141    
142        def draw_raster_data(self, layer, x,y, data, format = 'BMP'):
143    
144            mask = None
145            alpha = None
146            width = data[0]
147            height = data[1]
148            image_data, mask_data, alpha_data = data[2]
149    
150            if versions['wxPython-tuple'] < (2,5,3):
151                alpha_data = None
152    
153            if format == 'RAW':
154                image = wxEmptyImage(width, height)
155                image.SetData(image_data)
156                if mask_data is not None:
157                    mask = wxBitmapFromBits(mask_data, width, height, 1)
158                    mask = wxMask(mask)
159                elif alpha_data is not None:
160                    # alpha_data is already in the right format
161                    alpha = alpha_data
162    
         map_proj = self.map.projection  
         if map_proj is not None:  
             forward = map_proj.Forward  
163          else:          else:
164              forward = None              stream = cStringIO.StringIO(image_data)
165                image = wxImageFromStream(stream, raster_format_map[format])
166                if mask_data is not None:
167                    stream = cStringIO.StringIO(mask_data)
168                    mask = wxImageFromStream(stream, raster_format_map[format])
169                    mask = wxMask(wxBitmapFromImage(mask, 1))
170                elif alpha_data is not None:
171                    stream = cStringIO.StringIO(alpha_data)
172                    alpha = wxImageFromStream(stream, raster_format_map[format])
173                    alpha = alpha.GetData()[:] # XXX: do we need to copy this?
174    
175            #
176            # if we are using the alpha_data then scale down the alpha values
177            # by the layer's opacity using a string translation table
178            #
179            if alpha is not None:
180                lo = layer.Opacity()
181                if lo == 0:
182                    return
183                elif lo == 1:
184                    a = alpha
185                else:
186                    tr = [int(i*lo) for i in range(256)]
187                    table = array.array('B', tr).tostring()
188                    a = alpha.translate(table)
189    
190                image.SetAlphaData(a)
191    
192          for label in layer.Labels():          bitmap = wxBitmapFromImage(image)
193              x = label.x  
194              y = label.y          if mask is not None:
195              text = label.text              bitmap.SetMask(mask)
196              if forward:  
197                  x, y = forward(x, y)          self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
             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)  
198    
199    
200  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
201    
202      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
203      honor_visibility = 1      honor_visibility = 1
204        
205      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
206          """Render the map.          """Render the map.
207    
208          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 234  class ScreenRenderer(MapRenderer): Line 210  class ScreenRenderer(MapRenderer):
210          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
211          selected_layer.          selected_layer.
212          """          """
         self.update_region = region  
213          self.selected_layer = selected_layer          self.selected_layer = selected_layer
214          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
215          self.render_map(map)          self.render_map()
216    
217      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
218          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:  
                 func = self.draw_polygon_shape  
                 args = (pen, brush)  
             elif shapetype == SHAPETYPE_ARC:  
                 func = self.draw_polygon_shape  
                 args = (pen, None)  
             elif shapetype == SHAPETYPE_POINT:  
                 self.dc.SetBrush(brush)  
                 self.dc.SetPen(pen)  
                 func = self.draw_point_shape  
                 args = ()  
             else:  
                 raise TypeError(_("Unhandled shape type %s") % shapetype)  
219    
220              for index in self.selected_shapes:          Only the given region (a tuple in window coordinates as returned
221                  func(layer, index, *args)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
222            shapes given by the ids in selected_shapes in the
223            selected_layer.
224            """
225            return self.render_map_incrementally()
226    
227        def draw_selection_incrementally(self, layer, selected_shapes):
228            """Draw the selected shapes in a emphasized way (i.e.
229            with a special pen and brush.
230            The drawing is performed incrementally, that means every
231            n shapes, the user can have interactions with the map.
232            n is currently fixed to 500.
233    
234            layer -- the layer where the shapes belong to.
235            selected_shapes -- a list of the shape-ids representing the
236                               selected shapes for the given layer.
237            """
238            pen = wxPen(wxBLACK, 3, wxSOLID)
239            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
240    
241      def layer_ids(self, layer):          shapetype = layer.ShapeType()
242            useraw, func, param = self.low_level_renderer(layer)
243            args = (pen, brush)
244    
245            # for point shapes we need to find out the properties
246            # to determine the size. Based on table and field,
247            # we can find out the properties for object - see below.
248            if shapetype == SHAPETYPE_POINT:
249                lc = layer.GetClassification()
250                field = layer.GetClassificationColumn()
251                table = layer.ShapeStore().Table()
252    
253            count = 0
254            for index in selected_shapes:
255                count += 1
256                shape = layer.Shape(index)
257    
258                # Get the size of the specific property for this
259                # point
260                if shapetype == SHAPETYPE_POINT and field is not None:
261                    value = table.ReadValue(shape.ShapeID(), field)
262                    group = lc.FindGroup(value)
263                    size = group.GetProperties().GetSize()
264                    args = (pen, brush, size)
265    
266                if useraw:
267                    data = shape.RawData()
268                else:
269                    data = shape.Points()
270                func(param, data, *args)
271                if count % 500 == 0:
272                    yield True
273    
274        def layer_shapes(self, layer):
275          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
276    
277          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 284  class ScreenRenderer(MapRenderer): Line 292  class ScreenRenderer(MapRenderer):
292          offx, offy = self.offset          offx, offy = self.offset
293          xs = []          xs = []
294          ys = []          ys = []
295          x, y, width, height = self.update_region          x, y, width, height = self.region
296          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
297                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
298              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 301  class ScreenRenderer(MapRenderer): Line 309  class ScreenRenderer(MapRenderer):
309          return layer.ShapesInRegion((left, bottom, right, top))          return layer.ShapesInRegion((left, bottom, right, top))
310    
311    
312  class PrinterRender(MapRenderer):  class ExportRenderer(ScreenRenderer):
313    
314        honor_visibility = 1
315    
316        def __init__(self, *args, **kw):
317            """Initialize the ExportRenderer.
318    
319            In addition to all parameters of the the ScreenRender
320            constructor, this class requires and additional keyword argument
321            destination_region with a tuple (minx, miny, maxx, maxy) giving
322            the region in dc coordinates which is to contain the map.
323            """
324            self.destination_region = kw["destination_region"]
325            del kw["destination_region"]
326            ScreenRenderer.__init__(self, *args, **kw)
327    
328        def RenderMap(self, selected_layer, selected_shapes):
329            """Render the map.
330    
331            The rendering device has been specified during initialisation.
332            The device border distance was set in
333            Thuban.UI.viewport.output_transform().
334    
335            RenderMap renders a frame set (one page frame, one around
336            legend/scalebar and one around the map), the map, the legend and
337            the scalebar on the given DC. The map is rendered with the
338            region displayed in the canvas view, centered on the area
339            available for map display.
340            """
341    
342            self.selected_layer = selected_layer
343            self.selected_shapes = selected_shapes
344    
345            # Get some dimensions
346            llx, lly, urx, ury = self.region
347            mminx, mminy, mmaxx, mmaxy = self.destination_region
348    
349      # When printing we want to see all layers          # Manipulate the offset to position the map
350      honor_visibility = 0          offx, offy = self.offset
351            # 1. Shift to corner of map drawing area
352            offx = offx + mminx
353            offy = offy + mminy
354    
355            # 2. Center the map on the map drawing area:
356            # region identifies the region on the canvas view:
357            # center of map drawing area - half the size of region: rendering origin
358            self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
359            self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
360    
361            self.offset = (offx+self.shiftx, offy+self.shifty)
362            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
363    
364            # Draw the map
365            self.dc.BeginDrawing()
366            self.dc.DestroyClippingRegion()
367            self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
368                                      urx, ury)
369            self.render_map()
370            self.dc.EndDrawing()
371    
372            # Draw the rest (frames, legend, scalebar)
373            self.dc.BeginDrawing()
374            self.dc.DestroyClippingRegion()
375    
376            # Force the font for Legend drawing
377            font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
378            self.dc.SetFont(font)
379    
380            self.render_frame()
381            self.render_legend()
382            self.render_scalebar()
383            self.dc.EndDrawing()
384    
385        def render_frame(self):
386            """Render the frames for map and legend/scalebar."""
387    
388            dc = self.dc
389            dc.SetPen(wxBLACK_PEN)
390            dc.SetBrush(wxTRANSPARENT_BRUSH)
391    
392            # Dimension stuff
393            width, height = dc.GetSizeTuple()
394            mminx, mminy, mmaxx, mmaxy = self.destination_region
395    
396            # Page Frame
397            dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
398    
399            # Map Frame
400            llx, lly, urx, ury = self.region
401            dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
402    
403            # Legend Frame
404            dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
405    
406            dc.DestroyClippingRegion()
407            dc.SetClippingRegion(mmaxx+10,mminy,
408                                 (width-20) - (mmaxx+10), mmaxy-mminy)
409    
410        def render_legend(self):
411            """Render the legend on the Map."""
412    
413            previewer = ClassDataPreviewer()
414            dc = self.dc
415            dc.SetPen(wxBLACK_PEN)
416            dc.SetBrush(wxTRANSPARENT_BRUSH)
417    
418            # Dimension stuff
419            width, height = dc.GetSizeTuple()
420            mminx, mminy, mmaxx, mmaxy = self.destination_region
421            textwidth, textheight = dc.GetTextExtent("0")
422            iconwidth  = textheight
423            iconheight = textheight
424            stepy = textheight+3
425            dx = 10
426            posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
427                                    # 5 pix inside legend frame
428            posy = mminy + 5        # 5 pix inside legend frame
429    
430            # Render the legend
431            dc.SetTextForeground(wxBLACK)
432            if self.map.HasLayers():
433                layers = self.map.Layers()[:]
434                layers.reverse()
435                for l in layers:
436                    if l.Visible():
437                        # Render title
438                        dc.DrawText(l.Title(), posx, posy)
439                        posy+=stepy
440                        if l.HasClassification():
441                            # Render classification
442                            clazz = l.GetClassification()
443                            shapeType = l.ShapeType()
444                            for g in clazz:
445                                if g.IsVisible():
446                                    previewer.Draw(dc,
447                                        wxRect(posx+dx, posy,
448                                               iconwidth, iconheight),
449                                        g.GetProperties(), shapeType)
450                                    dc.DrawText(g.GetDisplayText(),
451                                                posx+2*dx+iconwidth, posy)
452                                    posy+=stepy
453    
454        def render_scalebar(self):
455            """Render the scalebar."""
456    
457            scalebar = ScaleBar(self.map)
458    
459            # Dimension stuff
460            width, height = self.dc.GetSizeTuple()
461            mminx, mminy, mmaxx, mmaxy = self.destination_region
462    
463            # Render the scalebar
464            scalebar.DrawScaleBar(self.scale, self.dc,
465                                 (mmaxx+10+5, mmaxy-25),
466                                 ((width-15-5) - (mmaxx+10+5),20)
467                                )
468            # 10 pix between map and legend frame, 5 pix inside legend frame
469            # 25 pix from the legend frame bottom line
470            # Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
471            # Height: 20
472    
473    class PrinterRenderer(ExportRenderer):
474    
475        # Printing as well as Export / Screen display only the visible layer.
476        honor_visibility = 1
477    
     RenderMap = MapRenderer.render_map  
       
Legend:
Removed from v.535  
changed lines
  Added in v.2601
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