/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1234 by jonathan, Wed Jun 18 14:47:38 2003 UTC revision 2618 by jonathan, Fri May 6 14:18:31 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    import array
20    
21    import traceback
22    
23  from Thuban import _  from Thuban import _
24    
25  from wxPython.wx import wxMemoryDC, wxEmptyBitmap, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
     wxPoint, wxRect, wxPen, wxBrush, wxFont, \  
26      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
27      wxBLACK_PEN, wxRED_PEN, wxBLACK, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
28      wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
29      wxBitmap, wxImageFromBitmap, wxBitmapFromImage, \      wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
30      wxImageFromStream, wxBITMAP_TYPE_BMP      wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits
31    
32  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
33    
# Line 27  from Thuban.UI.common import Color2wxCol Line 35  from Thuban.UI.common import Color2wxCol
35  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
36  from Thuban.UI.scalebar import ScaleBar  from Thuban.UI.scalebar import ScaleBar
37    
38  from Thuban.Model.layer import Layer, RasterLayer, \  from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
39       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  
40    
41  from Thuban.Model.classification import Classification  from Thuban.Model.color import Transparent
 from Thuban.Model.color import Color  
42  import Thuban.Model.resource  import Thuban.Model.resource
43    
44  if Thuban.Model.resource.has_gdal_support():  from baserenderer import BaseRenderer
     from gdalwarp import ProjectRasterFile  
   
 class MapRenderer:  
45    
46      """Class to render a map onto a wxDC"""  from math import floor
   
     honor_visibility = 1  
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  
   
         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  
         seenRaster = True  
49    
50          if self.scale == 0:  from Thuban.version import versions
             return  
51    
52          #  if Thuban.Model.resource.has_gdal_support():
53          # This is only a good optimization if there is only one      from gdalwarp import ProjectRasterFile
         # 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  
   
         self.draw_label_layer(map.LabelLayer())  
   
     def draw_shape_layer(self, layer):  
         scale = self.scale  
         offx, offy = self.offset  
54    
         map_proj = self.map.projection  
         layer_proj = layer.projection  
55    
56          shapetype = layer.ShapeType()  # Map the strings used for the format parameter of the draw_raster_data
57    # 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          brush = wxTRANSPARENT_BRUSH  class MapRenderer(BaseRenderer):
         pen   = wxTRANSPARENT_PEN  
67    
68          old_prop = None      """Class to render a map onto a wxDC"""
         old_group = None  
         lc = layer.GetClassification()  
         field = lc.GetField()  
         defaultGroup = lc.GetDefaultGroup()  
69    
70        TRANSPARENT_PEN = wxTRANSPARENT_PEN
71        TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
72    
73          if shapetype != SHAPETYPE_POINT:      def make_point(self, x, y):
74              polygon_render_param = self.polygon_render_param(layer)          return wxPoint(int(round(x)), int(round(y)))
75    
76          if shapetype == SHAPETYPE_POINT:      def tools_for_property(self, prop):
77              draw_func = lambda i: \          fill = prop.GetFill()
78                     self.draw_point_shape(layer, i)          if fill is Transparent:
79                brush = self.TRANSPARENT_BRUSH
80          else:          else:
81              draw_func = lambda i: \              brush = wxBrush(Color2wxColour(fill), wxSOLID)
                    self.draw_polygon_shape(polygon_render_param, i, pen, brush)  
   
         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  
   
                 prop = group.GetProperties()  
   
                 if prop != old_prop:  
                     old_prop = prop  
   
                     if shapetype == SHAPETYPE_ARC:  
                         fill = Color.Transparent  
                     else:  
                         fill = prop.GetFill()  
82    
83            stroke = prop.GetLineColor()
84            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                      if fill is Color.Transparent:      def low_level_renderer(self, layer):
91                          brush = wxTRANSPARENT_BRUSH          """Override inherited method to provide more efficient renderers
                     else:  
                         color = Color2wxColour(fill)  
                         brush = wxBrush(color, wxSOLID)  
92    
93                      stroke = prop.GetLineColor()          If the underlying data format is not a shapefile or the layer
94                      stroke_width = prop.GetLineWidth()          contains points shapes, simply use what the inherited method
95                      if stroke is Color.Transparent:          returns.
96                          pen = wxTRANSPARENT_PEN  
97                      else:          Otherwise, i.e. for arc and polygon use the more efficient
98                          color = Color2wxColour(stroke)          wxproj.draw_polygon_shape and its corresponding parameter
99                          pen = wxPen(color, stroke_width, wxSOLID)          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                      if shapetype == SHAPETYPE_POINT:      def label_font(self):
115                          self.dc.SetBrush(brush)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
116                          self.dc.SetPen(pen)                        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              draw_func(i)          Based on a given filename.  This method must be implemented in
123            classes derived from BaseRenderer.
124            """
125    
126      def draw_raster_layer(self, layer):          ret = None
         data = None  
         offx, offy = self.offset  
         width, height = self.dc.GetSizeTuple()  
127    
128          inProj = ""          if Thuban.Model.resource.has_gdal_support():
         proj = layer.GetProjection()  
         if proj is not None:  
             for p in proj.GetAllParameters():  
                 inProj += "+" + p + " "  
129    
130          outProj = ""              if versions['wxPython-tuple'] < (2,5,3):
131          proj = self.map.GetProjection()                  options = options | 4  # INVERT_MASK_BITS
132          if proj is not None:                  options = options & ~2 # ALPHA_MASK not supported
133              for p in proj.GetAllParameters():  
134                  outProj += "+" + p + " "              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, x,y, data, format = 'BMP', opacity=1.0):
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    
         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  
168          else:          else:
169              if data is not None:              stream = cStringIO.StringIO(image_data)
170                  stream = cStringIO.StringIO(data)              image = wxImageFromStream(stream, raster_format_map[format])
                 image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)  
                 bitmap = wxBitmapFromImage(image)  
                 self.dc.BeginDrawing()  
                 self.dc.DrawBitmap(bitmap, 0, 0)  
                 self.dc.EndDrawing()  
   
     def layer_ids(self, layer):  
         """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())  
171    
172      def polygon_render_param(self, layer):              if mask_data is not None:
173          """Return the low-lever render parameter for the layer"""                  stream = cStringIO.StringIO(mask_data)
174          offx, offy = self.offset                  mask = wxImageFromStream(stream, raster_format_map[format])
175          return draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,                  mask = wxMask(wxBitmapFromImage(mask, 1))
176                                   self.map.projection,              elif alpha_data is not None:
177                                   layer.projection,                  stream = cStringIO.StringIO(alpha_data)
178                                   self.scale, -self.scale,                  alpha = wxImageFromStream(stream, raster_format_map[format])
179                                   offx, offy)                  alpha = alpha.GetData() #[:] # XXX: do we need to copy this?
180                elif image.HasAlpha():
181      def draw_polygon_shape(self, draw_polygon_info, index, pen, brush):                  alpha = image.GetAlphaData()
         draw_polygon_shape(draw_polygon_info, index, pen, brush)  
182    
183      def projected_points(self, layer, index):          #
184          proj = self.map.GetProjection()          # scale down the alpha values the opacity level using a string
185          if proj is not None:          # translation table for efficiency.
186              forward = proj.Forward          #
187          else:          if alpha is not None:
188              forward = None              if opacity == 0:
189          proj = layer.GetProjection()                  return
190          if proj is not None:              elif opacity == 1:
191              inverse = proj.Inverse                  a = alpha
192          else:              else:
193              inverse = None                  tr = [int(i*opacity) for i in range(256)]
194          shape = layer.Shape(index)                  table = array.array('B', tr).tostring()
195          points = []                  a = alpha.translate(table)
         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)  
196    
197      def draw_label_layer(self, layer):              image.SetAlphaData(a)
         scale = self.scale  
         offx, offy = self.offset  
198    
199          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          bitmap = wxBitmapFromImage(image)
         self.dc.SetFont(font)  
200    
201          map_proj = self.map.projection          if mask is not None:
202          if map_proj is not None:              bitmap.SetMask(mask)
             forward = map_proj.Forward  
         else:  
             forward = None  
203    
204          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)  
205    
206    
207  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
208    
209      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
210      honor_visibility = 1      honor_visibility = 1
211        
212      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
213          """Render the map.          """Render the map.
214    
215          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 334  class ScreenRenderer(MapRenderer): Line 217  class ScreenRenderer(MapRenderer):
217          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
218          selected_layer.          selected_layer.
219          """          """
         self.update_region = region  
220          self.selected_layer = selected_layer          self.selected_layer = selected_layer
221          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
222          self.render_map(map)          self.render_map()
223    
224      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
225          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)  
226    
227              for index in self.selected_shapes:          Only the given region (a tuple in window coordinates as returned
228                  func(renderparam, index, *args)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
229            shapes given by the ids in selected_shapes in the
230            selected_layer.
231            """
232            return self.render_map_incrementally()
233    
234        def draw_selection_incrementally(self, layer, selected_shapes):
235            """Draw the selected shapes in a emphasized way (i.e.
236            with a special pen and brush.
237            The drawing is performed incrementally, that means every
238            n shapes, the user can have interactions with the map.
239            n is currently fixed to 500.
240    
241            layer -- the layer where the shapes belong to.
242            selected_shapes -- a list of the shape-ids representing the
243                               selected shapes for the given layer.
244            """
245            pen = wxPen(wxBLACK, 3, wxSOLID)
246            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
247    
248            shapetype = layer.ShapeType()
249            useraw, func, param = self.low_level_renderer(layer)
250            args = (pen, brush)
251    
252            # for point shapes we need to find out the properties
253            # to determine the size. Based on table and field,
254            # we can find out the properties for object - see below.
255            if shapetype == SHAPETYPE_POINT:
256                lc = layer.GetClassification()
257                field = layer.GetClassificationColumn()
258                table = layer.ShapeStore().Table()
259    
260            count = 0
261            for index in selected_shapes:
262                count += 1
263                shape = layer.Shape(index)
264    
265                # Get the size of the specific property for this
266                # point
267                if shapetype == SHAPETYPE_POINT and field is not None:
268                    value = table.ReadValue(shape.ShapeID(), field)
269                    group = lc.FindGroup(value)
270                    size = group.GetProperties().GetSize()
271                    args = (pen, brush, size)
272    
273                if useraw:
274                    data = shape.RawData()
275                else:
276                    data = shape.Points()
277                func(param, data, *args)
278                if count % 500 == 0:
279                    yield True
280    
281      def layer_ids(self, layer):      def layer_shapes(self, layer):
282          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
283    
284          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 389  class ScreenRenderer(MapRenderer): Line 299  class ScreenRenderer(MapRenderer):
299          offx, offy = self.offset          offx, offy = self.offset
300          xs = []          xs = []
301          ys = []          ys = []
302          x, y, width, height = self.update_region          x, y, width, height = self.region
303          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
304                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
305              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 409  class ScreenRenderer(MapRenderer): Line 319  class ScreenRenderer(MapRenderer):
319  class ExportRenderer(ScreenRenderer):  class ExportRenderer(ScreenRenderer):
320    
321      honor_visibility = 1      honor_visibility = 1
322        
323      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
324                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
325    
326            In addition to all parameters of the the ScreenRender
327            constructor, this class requires and additional keyword argument
328            destination_region with a tuple (minx, miny, maxx, maxy) giving
329            the region in dc coordinates which is to contain the map.
330            """
331            self.destination_region = kw["destination_region"]
332            del kw["destination_region"]
333            ScreenRenderer.__init__(self, *args, **kw)
334    
335        def RenderMap(self, selected_layer, selected_shapes):
336          """Render the map.          """Render the map.
337    
338          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
339          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
340                    Thuban.UI.viewport.output_transform().
341    
342          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
343          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
344          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
345          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
346            available for map display.
347          """          """
348            
         self.update_region = region  
349          self.selected_layer = selected_layer          self.selected_layer = selected_layer
350          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
351    
352          # Get some dimensions          # Get some dimensions
353          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
354          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
355    
356          # Manipulate the offset to position the map          # Manipulate the offset to position the map
357          offx, offy = self.offset          offx, offy = self.offset
358          # 1. Shift to corner of map drawing area          # 1. Shift to corner of map drawing area
359          offx = offx + mminx          offx = offx + mminx
360          offy = offy + mminy          offy = offy + mminy
361    
362          # 2. Center the map on the map drawing area:          # 2. Center the map on the map drawing area:
363          # region identifies the region on the canvas view:          # region identifies the region on the canvas view:
364          # center of map drawing area - half the size of region: rendering origin          # center of map drawing area - half the size of region: rendering origin
365          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
366          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
367    
368          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
369            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
370    
371          # Draw the map          # Draw the map
372          self.dc.BeginDrawing()          self.dc.BeginDrawing()
373          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
374          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
375                                    urx, ury)                                    urx, ury)
376          self.render_map(map)          self.render_map()
377          self.dc.EndDrawing()          self.dc.EndDrawing()
378    
379          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 462  class ExportRenderer(ScreenRenderer): Line 384  class ExportRenderer(ScreenRenderer):
384          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
385          self.dc.SetFont(font)          self.dc.SetFont(font)
386    
387          self.render_frame(region)          self.render_frame()
388          self.render_legend(map)          self.render_legend()
389          self.render_scalebar(map)          self.render_scalebar()
390          self.dc.EndDrawing()          self.dc.EndDrawing()
391    
392      def render_frame(self, region):      def render_frame(self):
393          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
394    
395          dc = self.dc          dc = self.dc
# Line 476  class ExportRenderer(ScreenRenderer): Line 398  class ExportRenderer(ScreenRenderer):
398    
399          # Dimension stuff          # Dimension stuff
400          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
401          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
402    
403          # Page Frame          # Page Frame
404          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
405            
406          # Map Frame          # Map Frame
407          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
408          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
409            
410          # Legend Frame          # Legend Frame
411          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
412    
# Line 492  class ExportRenderer(ScreenRenderer): Line 414  class ExportRenderer(ScreenRenderer):
414          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
415                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
416    
417      def render_legend(self, map):      def render_legend(self):
418          """Render the legend on the Map."""          """Render the legend on the Map."""
419    
420          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 502  class ExportRenderer(ScreenRenderer): Line 424  class ExportRenderer(ScreenRenderer):
424    
425          # Dimension stuff          # Dimension stuff
426          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
427          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
428          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
429          iconwidth  = textheight          iconwidth  = textheight
430          iconheight = textheight          iconheight = textheight
431          stepy = textheight+3          stepy = textheight+3
432          dx = 10          dx = 10
433          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
434                                  # 5 pix inside legend frame                                  # 5 pix inside legend frame
435          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
436            
437          # Render the legend          # Render the legend
438          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
439          if map.HasLayers():          if self.map.HasLayers():
440              for l in map.Layers():              layers = self.map.Layers()[:]
441                layers.reverse()
442                for l in layers:
443                  if l.Visible():                  if l.Visible():
444                      # Render title                      # Render title
445                      dc.DrawText(l.Title(), posx, posy)                      dc.DrawText(l.Title(), posx, posy)
446                      posy+=stepy                      posy+=stepy
447                      # Render classification                      if l.HasClassification():
448                      clazz = l.GetClassification()                          # Render classification
449                      shapeType = l.ShapeType()                          clazz = l.GetClassification()
450                      for g in clazz:                          shapeType = l.ShapeType()
451                          if g.IsVisible():                          for g in clazz:
452                              previewer.Draw(dc,                              if g.IsVisible():
453                                  wxRect(posx+dx, posy, iconwidth, iconheight),                                  previewer.Draw(dc,
454                                  g.GetProperties(), shapeType)                                      wxRect(posx+dx, posy,
455                              dc.DrawText(g.GetDisplayText(),                                             iconwidth, iconheight),
456                                          posx+2*dx+iconwidth, posy)                                      g.GetProperties(), shapeType)
457                              posy+=stepy                                  dc.DrawText(g.GetDisplayText(),
458                                                        posx+2*dx+iconwidth, posy)
459      def render_scalebar(self, map):                                  posy+=stepy
460    
461        def render_scalebar(self):
462          """Render the scalebar."""          """Render the scalebar."""
463    
464          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
465    
466          # Dimension stuff          # Dimension stuff
467          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
468          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
469          
470          # Render the scalebar          # Render the scalebar
471          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
472                               (mmaxx+10+5, mmaxy-25),                               (mmaxx+10+5, mmaxy-25),
473                               ((width-15-5) - (mmaxx+10+5),20)                               ((width-15-5) - (mmaxx+10+5),20)
474                              )                              )
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