/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 676 by jonathan, Tue Apr 15 19:20:40 2003 UTC revision 2602 by joey, Mon Apr 25 15:01:48 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  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, \  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  import time  from Thuban.UI.common import Color2wxColour
35    from Thuban.UI.classifier import ClassDataPreviewer
36    from Thuban.UI.scalebar import ScaleBar
37    
38    from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
39         SHAPETYPE_POINT, RAW_SHAPEFILE
40    
41  class MapRenderer:  from Thuban.Model.color import Transparent
42    import Thuban.Model.resource
43    
44      """Class to render a map onto a wxDC"""  from baserenderer import BaseRenderer
45    
46      honor_visibility = 1  from math import floor
47    
48      def __init__(self, dc, scale, offset, resolution = 72.0,  from types import StringType
                  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  
49    
50          assert scale > 0  from Thuban.version import versions
51    
52          self.dc = dc  if Thuban.Model.resource.has_gdal_support():
53          self.scale = scale      from gdalwarp import ProjectRasterFile
         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())  
54    
     def draw_shape_layer(self, layer):  
         scale = self.scale  
         offx, offy = self.offset  
55    
56          map_proj = self.map.projection  # Map the strings used for the format parameter of the draw_raster_data
57          layer_proj = layer.projection  # method to the appropriate wxWindows constants
58    raster_format_map = {
59        "BMP": wxBITMAP_TYPE_BMP,
60        "JPEG": wxBITMAP_TYPE_JPEG,
61        "PNG": wxBITMAP_TYPE_PNG,
62        "TIFF": wxBITMAP_TYPE_TIF,
63        "GIF": wxBITMAP_TYPE_GIF,
64        }
65    
66          shapetype = layer.ShapeType()  class MapRenderer(BaseRenderer):
67    
68          brush = wxTRANSPARENT_BRUSH      """Class to render a map onto a wxDC"""
         pen   = wxTRANSPARENT_PEN  
69    
70          old_prop = None      TRANSPARENT_PEN = wxTRANSPARENT_PEN
71          lc = layer.GetClassification()      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
         field = lc.GetField()  
   
         #print "drawing layer: ", layer.Title(),  
         #start = time.clock()  
         #count = 0  
   
         if shapetype != SHAPETYPE_POINT:  
             offx, offy = self.offset          
             draw_polygon_init(layer.shapefile.cobject(),  
                               self.dc,  
                               self.map.projection, layer.projection,  
                               self.scale, -self.scale, offx, offy)  
   
         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  
                 #  
72    
73                  group = lc.FindGroup(value)      def make_point(self, x, y):
74            return wxPoint(int(round(x)), int(round(y)))
                 #prop = lc.GetProperties(value)  
             else:  
                 group = lc.GetDefaultGroup()  
75    
76        def tools_for_property(self, prop):
77            fill = prop.GetFill()
78            if fill is Transparent:
79                brush = self.TRANSPARENT_BRUSH
80            else:
81                brush = wxBrush(Color2wxColour(fill), wxSOLID)
82    
83              if not group.IsVisible():          stroke = prop.GetLineColor()
84                  continue          if stroke is Transparent:
85                pen = self.TRANSPARENT_PEN
86            else:
87                pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
88            return pen, brush
89    
90              prop = group.GetProperties()      def low_level_renderer(self, layer):
91            """Override inherited method to provide more efficient renderers
92    
93              # don't recreate new objects if they are the same as before          If the underlying data format is not a shapefile or the layer
94              if prop != old_prop:          contains points shapes, simply use what the inherited method
95                  old_prop = prop          returns.
96    
97                  if shapetype == SHAPETYPE_ARC:          Otherwise, i.e. for arc and polygon use the more efficient
98                      fill = Color.Transparent          wxproj.draw_polygon_shape and its corresponding parameter
99                  else:          created with wxproj.draw_polygon_init.
100                      fill = prop.GetFill()          """
101            if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
102                    and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
103                  if fill is Color.Transparent:              offx, offy = self.offset
104                      brush = wxTRANSPARENT_BRUSH              x = lambda a, b, c, d: None
105                  else:              #return (True, x, None)
106                      color = Color2wxColour(fill)              return (True, draw_polygon_shape,
107                      brush = wxBrush(color, wxSOLID)                      draw_polygon_init(layer.ShapeStore().Shapefile(),
108                                              self.dc, self.map.projection,
109                  stroke = prop.GetLineColor()                                        layer.projection,
110                  stroke_width = prop.GetLineWidth()                                        self.scale, -self.scale, offx, offy))
111                  if stroke is Color.Transparent:          else:
112                      pen = wxTRANSPARENT_PEN              return BaseRenderer.low_level_renderer(self, layer)
                 else:  
                     color = Color2wxColour(stroke)  
                     pen = wxPen(color, stroke_width, wxSOLID)  
   
                 self.dc.SetBrush(brush)  
                 self.dc.SetPen(pen)  
       
             if shapetype == SHAPETYPE_POINT:  
                 self.draw_point_shape(layer, i)  
             else:  
                 self.draw_polygon_shape(layer, i, pen, brush)  
113    
114              #count += 1      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            """Returns a raster layer image in projected space
121    
122          #end = time.clock()          Based on a given filename.  This method must be implemented in
123          #print (end-start), "seconds -- ", count          classes derived from BaseRenderer.
124            """
125    
126            ret = None
127    
128      def layer_ids(self, layer):          if Thuban.Model.resource.has_gdal_support():
         """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())  
129    
130      def draw_polygon_shape(self, layer, index, pen, brush):              if versions['wxPython-tuple'] < (2,5,3):
131          draw_polygon_shape(index, pen, brush)                  options = options | 4  # INVERT_MASK_BITS
132                    options = options & ~2 # ALPHA_MASK not supported
133    
134                try:
135                    ret = ProjectRasterFile(layer.GetImageFilename(),
136                                            srcProj, dstProj,
137                                            extents, resolution, dimensions,
138                                            options)
139                except (MemoryError, IOError, AttributeError, ValueError):
140                    # Why does this catch AttributeError and ValueError?
141                    # FIXME: The exception should be communicated to the user
142                    # better.
143                    traceback.print_exc()
144    
145            return ret
146    
147        def draw_raster_data(self, layer, x,y, data, format = 'BMP'):
148    
149            mask = None
150            alpha = None
151            width = data[0]
152            height = data[1]
153            image_data, mask_data, alpha_data = data[2]
154    
155            if versions['wxPython-tuple'] < (2,5,3):
156                alpha_data = None
157    
158            if format == 'RAW':
159                image = wxEmptyImage(width, height)
160                image.SetData(image_data)
161                if mask_data is not None:
162                    mask = wxBitmapFromBits(mask_data, width, height, 1)
163                    mask = wxMask(mask)
164                elif alpha_data is not None:
165                    # alpha_data is already in the right format
166                    alpha = alpha_data
167    
     def projected_points(self, layer, index):  
         proj = self.map.projection  
         if proj is not None:  
             forward = proj.Forward  
168          else:          else:
169              forward = None              stream = cStringIO.StringIO(image_data)
170          proj = layer.projection              image = wxImageFromStream(stream, raster_format_map[format])
171          if proj is not None:              if mask_data is not None:
172              inverse = proj.Inverse                  stream = cStringIO.StringIO(mask_data)
173          else:                  mask = wxImageFromStream(stream, raster_format_map[format])
174              inverse = None                  mask = wxMask(wxBitmapFromImage(mask, 1))
175          shape = layer.Shape(index)              elif alpha_data is not None:
176          points = []                  stream = cStringIO.StringIO(alpha_data)
177          scale = self.scale                  alpha = wxImageFromStream(stream, raster_format_map[format])
178          offx, offy = self.offset                  alpha = alpha.GetData()[:] # XXX: do we need to copy this?
179          for x, y in shape.Points():  
180              if inverse:          #
181                  x, y = inverse(x, y)          # if we are using the alpha_data then scale down the alpha values
182              if forward:          # by the layer's opacity using a string translation table
183                  x, y = forward(x, y)          #
184              points.append(wxPoint(x * scale + offx,          if alpha is not None:
185                                    -y * scale + offy))              lo = layer.Opacity()
186          return points              if lo == 0:
187                    return
188      def draw_arc_shape(self, layer, index):              elif lo == 1:
189          points = self.projected_points(layer, index)                  a = alpha
190          self.dc.DrawLines(points)              else:
191                    tr = [int(i*lo) for i in range(256)]
192      def draw_point_shape(self, layer, index):                  table = array.array('B', tr).tostring()
193          pp = self.projected_points(layer, index)                  a = alpha.translate(table)
   
         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)  
194    
195      def draw_label_layer(self, layer):              image.SetAlphaData(a)
         scale = self.scale  
         offx, offy = self.offset  
196    
197          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          bitmap = wxBitmapFromImage(image)
         self.dc.SetFont(font)  
198    
199          map_proj = self.map.projection          if mask is not None:
200          if map_proj is not None:              bitmap.SetMask(mask)
             forward = map_proj.Forward  
         else:  
             forward = None  
201    
202          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)  
203    
204    
205  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
206    
207      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
208      honor_visibility = 1      honor_visibility = 1
209        
210      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
211          """Render the map.          """Render the map.
212    
213          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 265  class ScreenRenderer(MapRenderer): Line 215  class ScreenRenderer(MapRenderer):
215          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
216          selected_layer.          selected_layer.
217          """          """
         self.update_region = region  
218          self.selected_layer = selected_layer          self.selected_layer = selected_layer
219          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
220          self.render_map(map)          self.render_map()
221    
222      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
223          MapRenderer.draw_shape_layer(self, layer)          """Render the map.
224          if layer is self.selected_layer and self.selected_shapes:  
225              pen = wxPen(wxBLACK, 3, wxSOLID)          Only the given region (a tuple in window coordinates as returned
226              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
227            shapes given by the ids in selected_shapes in the
228              shapetype = layer.ShapeType()          selected_layer.
229              if shapetype == SHAPETYPE_POLYGON:          """
230                  func = self.draw_polygon_shape          return self.render_map_incrementally()
231                  args = (pen, brush)  
232              elif shapetype == SHAPETYPE_ARC:      def draw_selection_incrementally(self, layer, selected_shapes):
233                  func = self.draw_polygon_shape          """Draw the selected shapes in a emphasized way (i.e.
234                  args = (pen, None)          with a special pen and brush.
235              elif shapetype == SHAPETYPE_POINT:          The drawing is performed incrementally, that means every
236                  self.dc.SetBrush(brush)          n shapes, the user can have interactions with the map.
237                  self.dc.SetPen(pen)          n is currently fixed to 500.
238                  func = self.draw_point_shape  
239                  args = ()          layer -- the layer where the shapes belong to.
240              else:          selected_shapes -- a list of the shape-ids representing the
241                  raise TypeError(_("Unhandled shape type %s") % shapetype)                             selected shapes for the given layer.
242            """
243            pen = wxPen(wxBLACK, 3, wxSOLID)
244            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
245    
246              for index in self.selected_shapes:          shapetype = layer.ShapeType()
247                  func(layer, index, *args)          useraw, func, param = self.low_level_renderer(layer)
248            args = (pen, brush)
249    
250      def layer_ids(self, layer):          # for point shapes we need to find out the properties
251            # to determine the size. Based on table and field,
252            # we can find out the properties for object - see below.
253            if shapetype == SHAPETYPE_POINT:
254                lc = layer.GetClassification()
255                field = layer.GetClassificationColumn()
256                table = layer.ShapeStore().Table()
257    
258            count = 0
259            for index in selected_shapes:
260                count += 1
261                shape = layer.Shape(index)
262    
263                # Get the size of the specific property for this
264                # point
265                if shapetype == SHAPETYPE_POINT and field is not None:
266                    value = table.ReadValue(shape.ShapeID(), field)
267                    group = lc.FindGroup(value)
268                    size = group.GetProperties().GetSize()
269                    args = (pen, brush, size)
270    
271                if useraw:
272                    data = shape.RawData()
273                else:
274                    data = shape.Points()
275                func(param, data, *args)
276                if count % 500 == 0:
277                    yield True
278    
279        def layer_shapes(self, layer):
280          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
281    
282          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 315  class ScreenRenderer(MapRenderer): Line 297  class ScreenRenderer(MapRenderer):
297          offx, offy = self.offset          offx, offy = self.offset
298          xs = []          xs = []
299          ys = []          ys = []
300          x, y, width, height = self.update_region          x, y, width, height = self.region
301          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
302                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
303              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 332  class ScreenRenderer(MapRenderer): Line 314  class ScreenRenderer(MapRenderer):
314          return layer.ShapesInRegion((left, bottom, right, top))          return layer.ShapesInRegion((left, bottom, right, top))
315    
316    
317  class PrinterRender(MapRenderer):  class ExportRenderer(ScreenRenderer):
318    
319        honor_visibility = 1
320    
321        def __init__(self, *args, **kw):
322            """Initialize the ExportRenderer.
323    
324            In addition to all parameters of the the ScreenRender
325            constructor, this class requires and additional keyword argument
326            destination_region with a tuple (minx, miny, maxx, maxy) giving
327            the region in dc coordinates which is to contain the map.
328            """
329            self.destination_region = kw["destination_region"]
330            del kw["destination_region"]
331            ScreenRenderer.__init__(self, *args, **kw)
332    
333        def RenderMap(self, selected_layer, selected_shapes):
334            """Render the map.
335    
336            The rendering device has been specified during initialisation.
337            The device border distance was set in
338            Thuban.UI.viewport.output_transform().
339    
340            RenderMap renders a frame set (one page frame, one around
341            legend/scalebar and one around the map), the map, the legend and
342            the scalebar on the given DC. The map is rendered with the
343            region displayed in the canvas view, centered on the area
344            available for map display.
345            """
346    
347            self.selected_layer = selected_layer
348            self.selected_shapes = selected_shapes
349    
350            # Get some dimensions
351            llx, lly, urx, ury = self.region
352            mminx, mminy, mmaxx, mmaxy = self.destination_region
353    
354            # Manipulate the offset to position the map
355            offx, offy = self.offset
356            # 1. Shift to corner of map drawing area
357            offx = offx + mminx
358            offy = offy + mminy
359    
360            # 2. Center the map on the map drawing area:
361            # region identifies the region on the canvas view:
362            # center of map drawing area - half the size of region: rendering origin
363            self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
364            self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
365    
366            self.offset = (offx+self.shiftx, offy+self.shifty)
367            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
368    
369            # Draw the map
370            self.dc.BeginDrawing()
371            self.dc.DestroyClippingRegion()
372            self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
373                                      urx, ury)
374            self.render_map()
375            self.dc.EndDrawing()
376    
377            # Draw the rest (frames, legend, scalebar)
378            self.dc.BeginDrawing()
379            self.dc.DestroyClippingRegion()
380    
381      # When printing we want to see all layers          # Force the font for Legend drawing
382      honor_visibility = 0          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
383            self.dc.SetFont(font)
384    
385            self.render_frame()
386            self.render_legend()
387            self.render_scalebar()
388            self.dc.EndDrawing()
389    
390        def render_frame(self):
391            """Render the frames for map and legend/scalebar."""
392    
393            dc = self.dc
394            dc.SetPen(wxBLACK_PEN)
395            dc.SetBrush(wxTRANSPARENT_BRUSH)
396    
397            # Dimension stuff
398            width, height = dc.GetSizeTuple()
399            mminx, mminy, mmaxx, mmaxy = self.destination_region
400    
401            # Page Frame
402            dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
403    
404            # Map Frame
405            llx, lly, urx, ury = self.region
406            dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
407    
408            # Legend Frame
409            dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
410    
411            dc.DestroyClippingRegion()
412            dc.SetClippingRegion(mmaxx+10,mminy,
413                                 (width-20) - (mmaxx+10), mmaxy-mminy)
414    
415        def render_legend(self):
416            """Render the legend on the Map."""
417    
418            previewer = ClassDataPreviewer()
419            dc = self.dc
420            dc.SetPen(wxBLACK_PEN)
421            dc.SetBrush(wxTRANSPARENT_BRUSH)
422    
423            # Dimension stuff
424            width, height = dc.GetSizeTuple()
425            mminx, mminy, mmaxx, mmaxy = self.destination_region
426            textwidth, textheight = dc.GetTextExtent("0")
427            iconwidth  = textheight
428            iconheight = textheight
429            stepy = textheight+3
430            dx = 10
431            posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
432                                    # 5 pix inside legend frame
433            posy = mminy + 5        # 5 pix inside legend frame
434    
435            # Render the legend
436            dc.SetTextForeground(wxBLACK)
437            if self.map.HasLayers():
438                layers = self.map.Layers()[:]
439                layers.reverse()
440                for l in layers:
441                    if l.Visible():
442                        # Render title
443                        dc.DrawText(l.Title(), posx, posy)
444                        posy+=stepy
445                        if l.HasClassification():
446                            # Render classification
447                            clazz = l.GetClassification()
448                            shapeType = l.ShapeType()
449                            for g in clazz:
450                                if g.IsVisible():
451                                    previewer.Draw(dc,
452                                        wxRect(posx+dx, posy,
453                                               iconwidth, iconheight),
454                                        g.GetProperties(), shapeType)
455                                    dc.DrawText(g.GetDisplayText(),
456                                                posx+2*dx+iconwidth, posy)
457                                    posy+=stepy
458    
459        def render_scalebar(self):
460            """Render the scalebar."""
461    
462            scalebar = ScaleBar(self.map)
463    
464            # Dimension stuff
465            width, height = self.dc.GetSizeTuple()
466            mminx, mminy, mmaxx, mmaxy = self.destination_region
467    
468            # Render the scalebar
469            scalebar.DrawScaleBar(self.scale, self.dc,
470                                 (mmaxx+10+5, mmaxy-25),
471                                 ((width-15-5) - (mmaxx+10+5),20)
472                                )
473            # 10 pix between map and legend frame, 5 pix inside legend frame
474            # 25 pix from the legend frame bottom line
475            # Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
476            # Height: 20
477    
478    class PrinterRenderer(ExportRenderer):
479    
480        # Printing as well as Export / Screen display only the visible layer.
481        honor_visibility = 1
482    
     RenderMap = MapRenderer.render_map  
       
Legend:
Removed from v.676  
changed lines
  Added in v.2602
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