/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
ViewVC logotype

Diff of /branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1452 by bh, Fri Jul 18 12:57:59 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]>  # 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    
 from Thuban.Model.classification import Classification  
41  from Thuban.Model.color import Transparent  from Thuban.Model.color import Transparent
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:  
   
     """Class to render a map onto a wxDC"""  
   
     honor_visibility = 1  
   
     def __init__(self, dc, scale, offset, resolution = 72.0,  
                  honor_visibility = None):  
         """Inititalize the renderer.  
   
         dc -- the wxPython DC to render on  
         scale, offset -- the scale factor and translation to convert  
                 between projected coordinates and the DC coordinates  
   
         resolution -- the assumed resolution of the DC. Used to convert  
                 absolute lengths like font sizes to DC coordinates  
   
         honor_visibility -- boolean. If true, honor the visibility flag  
                 of the layers, otherwise draw all layers. If None, use  
                 the renderer's default.  
         """  
         # resolution in pixel/inch  
45    
46          self.dc = dc  from math import floor
         self.scale = scale  
         self.offset = offset  
         if honor_visibility is not None:  
             self.honor_visibility = honor_visibility  
         # store the resolution in pixel/point because it's more useful  
         # later.  
         self.resolution = resolution / 72.0  
   
     def render_map(self, map):  
         self.map = map  
         seenRaster = True  
47    
48          if self.scale == 0:  from types import StringType
             return  
49    
50          #  from Thuban.version import versions
         # This is only a good optimization if there is only one  
         # raster layer and the image covers the entire window (as  
         # it currently does). We note if there is a raster layer  
         # and only begin drawing layers once we have drawn it.  
         # That way we avoid drawing layers that won't be seen.  
         #  
         if Thuban.Model.resource.has_gdal_support():  
             for layer in map.Layers():  
                 if isinstance(layer, RasterLayer) and layer.Visible():  
                     seenRaster = False  
                     break  
   
         for layer in map.Layers():  
             # if honor_visibility is true, only draw visible layers,  
             # otherwise draw all layers  
             if not self.honor_visibility or layer.Visible():  
                 if isinstance(layer, Layer) and seenRaster:  
                     self.draw_shape_layer(layer)  
                 elif isinstance(layer, RasterLayer) \  
                     and Thuban.Model.resource.has_gdal_support():  
                     self.draw_raster_layer(layer)  
                     seenRaster = True  
51    
52          self.draw_label_layer(map.LabelLayer())  if Thuban.Model.resource.has_gdal_support():
53        from gdalwarp import ProjectRasterFile
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          old_group = None      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
         lc = layer.GetClassification()  
         field = layer.GetClassificationColumn()  
         defaultGroup = lc.GetDefaultGroup()  
72    
73        def make_point(self, x, y):
74            return wxPoint(int(round(x)), int(round(y)))
75    
76          if shapetype == SHAPETYPE_POINT:      def tools_for_property(self, prop):
77              draw_func = self.draw_point_shape          fill = prop.GetFill()
78              draw_func_param = layer          if fill is Transparent:
79                brush = self.TRANSPARENT_BRUSH
80          else:          else:
81              draw_func = draw_polygon_shape              brush = wxBrush(Color2wxColour(fill), wxSOLID)
             draw_func_param = self.polygon_render_param(layer)  
82    
83          table = layer.ShapeStore().Table()          stroke = prop.GetLineColor()
84          for i in self.layer_ids(layer):          if stroke is Transparent:
85                pen = self.TRANSPARENT_PEN
86              if field is None:          else:
87                  group = defaultGroup              pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)
88              else:          return pen, brush
                 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 = Transparent  
                     else:  
                         fill = prop.GetFill()  
89    
90        def low_level_renderer(self, layer):
91            """Override inherited method to provide more efficient renderers
92    
93                      if fill is Transparent:          If the underlying data format is not a shapefile or the layer
94                          brush = wxTRANSPARENT_BRUSH          contains points shapes, simply use what the inherited method
95                      else:          returns.
96                          color = Color2wxColour(fill)  
97                          brush = wxBrush(color, wxSOLID)          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                      stroke = prop.GetLineColor()      def label_font(self):
115                      stroke_width = prop.GetLineWidth()          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
116                      if stroke is Transparent:                        wxNORMAL)
                         pen = wxTRANSPARENT_PEN  
                     else:  
                         color = Color2wxColour(stroke)  
                         pen = wxPen(color, stroke_width, wxSOLID)  
117    
118              draw_func(draw_func_param, i, pen, brush)      def projected_raster_layer(self, layer, srcProj, dstProj, extents,
119                                   resolution, dimensions, options):
120    
121      def draw_raster_layer(self, layer):          ret = None
         data = None  
         offx, offy = self.offset  
         width, height = self.dc.GetSizeTuple()  
122    
123          inProj = ""          if Thuban.Model.resource.has_gdal_support():
         proj = layer.GetProjection()  
         if proj is not None:  
             for p in proj.GetAllParameters():  
                 inProj += "+" + p + " "  
124    
125          outProj = ""              if versions['wxPython-tuple'] < (2,5,3):
126          proj = self.map.GetProjection()                  options = options | 4  # INVERT_MASK_BITS
127          if proj is not None:                  options = options & ~2 # ALPHA_MASK not supported
128              for p in proj.GetAllParameters():  
129                  outProj += "+" + p + " "              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    
         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  
163          else:          else:
164              if data is not None:              stream = cStringIO.StringIO(image_data)
165                  stream = cStringIO.StringIO(data)              image = wxImageFromStream(stream, raster_format_map[format])
166                  image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)              if mask_data is not None:
167                  bitmap = wxBitmapFromImage(image)                  stream = cStringIO.StringIO(mask_data)
168                  self.dc.BeginDrawing()                  mask = wxImageFromStream(stream, raster_format_map[format])
169                  self.dc.DrawBitmap(bitmap, 0, 0)                  mask = wxMask(wxBitmapFromImage(mask, 1))
170                  self.dc.EndDrawing()              elif alpha_data is not None:
171                    stream = cStringIO.StringIO(alpha_data)
172      def layer_ids(self, layer):                  alpha = wxImageFromStream(stream, raster_format_map[format])
173          """Return the shape ids of the given layer that have to be drawn.                  alpha = alpha.GetData()[:] # XXX: do we need to copy this?
   
         The default implementation simply returns all ids in the layer.  
         Override in derived classes to be more precise.  
         """  
         return range(layer.NumShapes())  
   
     def polygon_render_param(self, layer):  
         """Return the low-lever render parameter for the layer"""  
         offx, offy = self.offset  
         return draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,  
                                  self.map.projection,  
                                  layer.projection,  
                                  self.scale, -self.scale,  
                                  offx, offy)  
174    
175      def draw_polygon_shape(self, draw_polygon_info, index, pen, brush):          #
176          draw_polygon_shape(draw_polygon_info, index, pen, brush)          # 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      def projected_points(self, layer, index):          #
179          proj = self.map.GetProjection()          if alpha is not None:
180          if proj is not None:              lo = layer.Opacity()
181              forward = proj.Forward              if lo == 0:
182          else:                  return
183              forward = None              elif lo == 1:
184          proj = layer.GetProjection()                  a = alpha
185          if proj is not None:              else:
186              inverse = proj.Inverse                  tr = [int(i*lo) for i in range(256)]
187          else:                  table = array.array('B', tr).tostring()
188              inverse = None                  a = alpha.translate(table)
         shape = layer.Shape(index)  
         points = []  
         scale = self.scale  
         offx, offy = self.offset  
         for x, y in shape.Points():  
             if inverse:  
                 x, y = inverse(x, y)  
             if forward:  
                 x, y = forward(x, y)  
             points.append(wxPoint(x * scale + offx,  
                                   -y * scale + offy))  
         return points  
   
     def draw_arc_shape(self, layer, index):  
         points = self.projected_points(layer, index)  
         self.dc.DrawLines(points)  
   
     def draw_point_shape(self, layer, index, pen, brush):  
         pp = self.projected_points(layer, index)  
   
         if len(pp) == 0: return # ignore Null Shapes which have no points  
   
         p = pp[0]  
         radius = self.resolution * 5  
         self.dc.SetBrush(brush)  
         self.dc.SetPen(pen)  
         self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)  
189    
190      def draw_label_layer(self, layer):              image.SetAlphaData(a)
         scale = self.scale  
         offx, offy = self.offset  
191    
192          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          bitmap = wxBitmapFromImage(image)
         self.dc.SetFont(font)  
193    
194          map_proj = self.map.projection          if mask is not None:
195          if map_proj is not None:              bitmap.SetMask(mask)
             forward = map_proj.Forward  
         else:  
             forward = None  
196    
197          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)  
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 329  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.
219          if layer is self.selected_layer and self.selected_shapes:  
220              pen = wxPen(wxBLACK, 3, wxSOLID)          Only the given region (a tuple in window coordinates as returned
221              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
222            shapes given by the ids in selected_shapes in the
223              shapetype = layer.ShapeType()          selected_layer.
224              if shapetype == SHAPETYPE_POLYGON:          """
225                  offx, offy = self.offset          return self.render_map_incrementally()
                 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:      def draw_selection_incrementally(self, layer, selected_shapes):
228                  func(renderparam, index, *args)          """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            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_ids(self, layer):      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 384  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 404  class ScreenRenderer(MapRenderer): Line 312  class ScreenRenderer(MapRenderer):
312  class ExportRenderer(ScreenRenderer):  class ExportRenderer(ScreenRenderer):
313    
314      honor_visibility = 1      honor_visibility = 1
315        
316      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
317                    selected_layer, selected_shapes ):          """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.          """Render the map.
330    
331          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
332          The device border distance was set in Thuban.UI.view.OutputTranform().          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          RenderMap renders a frame set (one page frame, one around
336          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
337          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
338          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
339            available for map display.
340          """          """
341            
         self.update_region = region  
342          self.selected_layer = selected_layer          self.selected_layer = selected_layer
343          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
344    
345          # Get some dimensions          # Get some dimensions
346          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
347          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
348    
349          # Manipulate the offset to position the map          # Manipulate the offset to position the map
350          offx, offy = self.offset          offx, offy = self.offset
351          # 1. Shift to corner of map drawing area          # 1. Shift to corner of map drawing area
352          offx = offx + mminx          offx = offx + mminx
353          offy = offy + mminy          offy = offy + mminy
354    
355          # 2. Center the map on the map drawing area:          # 2. Center the map on the map drawing area:
356          # region identifies the region on the canvas view:          # region identifies the region on the canvas view:
357          # center of map drawing area - half the size of region: rendering origin          # center of map drawing area - half the size of region: rendering origin
358          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5          self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
359          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
360    
361          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
362            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
363    
364          # Draw the map          # Draw the map
365          self.dc.BeginDrawing()          self.dc.BeginDrawing()
366          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
367          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
368                                    urx, ury)                                    urx, ury)
369          self.render_map(map)          self.render_map()
370          self.dc.EndDrawing()          self.dc.EndDrawing()
371    
372          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 457  class ExportRenderer(ScreenRenderer): Line 377  class ExportRenderer(ScreenRenderer):
377          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
378          self.dc.SetFont(font)          self.dc.SetFont(font)
379    
380          self.render_frame(region)          self.render_frame()
381          self.render_legend(map)          self.render_legend()
382          self.render_scalebar(map)          self.render_scalebar()
383          self.dc.EndDrawing()          self.dc.EndDrawing()
384    
385      def render_frame(self, region):      def render_frame(self):
386          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
387    
388          dc = self.dc          dc = self.dc
# Line 471  class ExportRenderer(ScreenRenderer): Line 391  class ExportRenderer(ScreenRenderer):
391    
392          # Dimension stuff          # Dimension stuff
393          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
394          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
395    
396          # Page Frame          # Page Frame
397          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
398            
399          # Map Frame          # Map Frame
400          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
401          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
402            
403          # Legend Frame          # Legend Frame
404          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)          dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
405    
# Line 487  class ExportRenderer(ScreenRenderer): Line 407  class ExportRenderer(ScreenRenderer):
407          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
408                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
409    
410      def render_legend(self, map):      def render_legend(self):
411          """Render the legend on the Map."""          """Render the legend on the Map."""
412    
413          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 497  class ExportRenderer(ScreenRenderer): Line 417  class ExportRenderer(ScreenRenderer):
417    
418          # Dimension stuff          # Dimension stuff
419          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
420          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
421          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
422          iconwidth  = textheight          iconwidth  = textheight
423          iconheight = textheight          iconheight = textheight
424          stepy = textheight+3          stepy = textheight+3
425          dx = 10          dx = 10
426          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,          posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
427                                  # 5 pix inside legend frame                                  # 5 pix inside legend frame
428          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
429            
430          # Render the legend          # Render the legend
431          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
432          if map.HasLayers():          if self.map.HasLayers():
433              layers = map.Layers()              layers = self.map.Layers()[:]
434              layers.reverse()              layers.reverse()
435              for l in layers:              for l in layers:
436                  if l.Visible():                  if l.Visible():
# Line 523  class ExportRenderer(ScreenRenderer): Line 443  class ExportRenderer(ScreenRenderer):
443                          shapeType = l.ShapeType()                          shapeType = l.ShapeType()
444                          for g in clazz:                          for g in clazz:
445                              if g.IsVisible():                              if g.IsVisible():
446                                  previewer.Draw(dc,                                  previewer.Draw(dc,
447                                      wxRect(posx+dx, posy,                                      wxRect(posx+dx, posy,
448                                             iconwidth, iconheight),                                             iconwidth, iconheight),
449                                      g.GetProperties(), shapeType)                                      g.GetProperties(), shapeType)
450                                  dc.DrawText(g.GetDisplayText(),                                  dc.DrawText(g.GetDisplayText(),
451                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
452                                  posy+=stepy                                  posy+=stepy
453            
454      def render_scalebar(self, map):      def render_scalebar(self):
455          """Render the scalebar."""          """Render the scalebar."""
456    
457          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
458    
459          # Dimension stuff          # Dimension stuff
460          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
461          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
462          
463          # Render the scalebar          # Render the scalebar
464          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
465                               (mmaxx+10+5, mmaxy-25),                               (mmaxx+10+5, mmaxy-25),
466                               ((width-15-5) - (mmaxx+10+5),20)                               ((width-15-5) - (mmaxx+10+5),20)
467                              )                              )
Legend:
Removed from v.1452  
changed lines
  Added in v.2601
[email protected]
 ViewVC Help
Powered by ViewVC 1.1.26