/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 468 by jonathan, Wed Mar 5 18:19:13 2003 UTC revision 1467 by jonathan, Tue Jul 22 14:02:57 2003 UTC
# Line 2  Line 2 
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]>
5    # Frank Koormann <[email protected]>
6  #  #
7  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
8  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
9    
10  __version__ = "$Revision$"  __version__ = "$Revision$"
11    
12  from wxPython.wx import wxPoint, wxPen, wxBrush, wxFont, \  import cStringIO
      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \  
      wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL  
   
 from wxproj import draw_polygon_shape  
13    
14  from Thuban import _  from Thuban import _
 from Thuban.UI.common import *  
15    
16  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from wxPython.wx import wxMemoryDC, wxEmptyBitmap, \
17       SHAPETYPE_POINT      wxPoint, wxRect, wxPen, wxBrush, wxFont, \
18        wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
19        wxBLACK_PEN, wxRED_PEN, wxBLACK, \
20        wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
21        wxBitmap, wxImageFromBitmap, wxBitmapFromImage, \
22        wxImageFromStream, wxBITMAP_TYPE_BMP
23    
24    from wxproj import draw_polygon_shape, draw_polygon_init
25    
26    from Thuban.UI.common import Color2wxColour
27    from Thuban.UI.classifier import ClassDataPreviewer
28    from Thuban.UI.scalebar import ScaleBar
29    
30    from Thuban.Model.layer import Layer, RasterLayer, \
31         SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT
32  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \
33       ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE       ALIGN_LEFT, ALIGN_RIGHT, ALIGN_BASELINE
34    
35  from Thuban.Model.classification import Classification  from Thuban.Model.classification import Classification
36  from Thuban.Model.color import Color  from Thuban.Model.color import Transparent
37    import Thuban.Model.resource
38    
39    if Thuban.Model.resource.has_gdal_support():
40        from gdalwarp import ProjectRasterFile
41    
42  class MapRenderer:  class MapRenderer:
43    
# Line 48  class MapRenderer: Line 61  class MapRenderer:
61                  the renderer's default.                  the renderer's default.
62          """          """
63          # resolution in pixel/inch          # resolution in pixel/inch
64    
65          self.dc = dc          self.dc = dc
66          self.scale = scale          self.scale = scale
67          self.offset = offset          self.offset = offset
# Line 59  class MapRenderer: Line 73  class MapRenderer:
73    
74      def render_map(self, map):      def render_map(self, map):
75          self.map = map          self.map = map
76            seenRaster = True
77    
78            self.dc.BeginDrawing()
79    
80            #
81            # This is only a good optimization if there is only one
82            # raster layer and the image covers the entire window (as
83            # it currently does). We note if there is a raster layer
84            # and only begin drawing layers once we have drawn it.
85            # That way we avoid drawing layers that won't be seen.
86            #
87            if Thuban.Model.resource.has_gdal_support():
88                for layer in map.Layers():
89                    if isinstance(layer, RasterLayer) and layer.Visible():
90                        seenRaster = False
91                        break
92    
93          for layer in map.Layers():          for layer in map.Layers():
94              # if honor_visibility is true, only draw visible layers,              # if honor_visibility is true, only draw visible layers,
95              # otherwise draw all layers              # otherwise draw all layers
96              if not self.honor_visibility or layer.Visible():              if not self.honor_visibility or layer.Visible():
97                  self.draw_shape_layer(layer)                  if isinstance(layer, Layer) and seenRaster:
98                        self.draw_shape_layer(layer)
99                    elif isinstance(layer, RasterLayer) \
100                        and Thuban.Model.resource.has_gdal_support():
101                        self.draw_raster_layer(layer)
102                        seenRaster = True
103    
104          self.draw_label_layer(map.LabelLayer())          self.draw_label_layer(map.LabelLayer())
105    
106            self.dc.EndDrawing()
107    
108      def draw_shape_layer(self, layer):      def draw_shape_layer(self, layer):
109          scale = self.scale          scale = self.scale
110          offx, offy = self.offset          offx, offy = self.offset
# Line 79  class MapRenderer: Line 118  class MapRenderer:
118          pen   = wxTRANSPARENT_PEN          pen   = wxTRANSPARENT_PEN
119    
120          old_prop = None          old_prop = None
121            old_group = None
122          lc = layer.GetClassification()          lc = layer.GetClassification()
123          field = lc.GetField()          field = layer.GetClassificationColumn()
124            defaultGroup = lc.GetDefaultGroup()
125    
126    
         defaultProps = lc.GetDefaultGroup().GetProperties()  
127    
128            if shapetype == SHAPETYPE_POINT:
129                draw_func = self.draw_point_shape
130                draw_func_param = layer
131            else:
132                draw_func = draw_polygon_shape
133                draw_func_param = self.polygon_render_param(layer)
134    
135            table = layer.ShapeStore().Table()
136          for i in self.layer_ids(layer):          for i in self.layer_ids(layer):
             value = None  
137    
138              if field is not None:              if field is None:
139                  try:                  group = defaultGroup
                     record = layer.table.read_record(i)  
                     if record is not None:  
                         value = record[field]  
                 except:  
                     pass  
   
                 #  
                 # if the above statements fail 'value' should  
                 # be null, at which point this call will  
                 # at least retreive the NullData  
                 #  
                 prop = lc.GetProperties(value)  
140              else:              else:
141                  prop = defaultProps                  record = table.ReadRowAsDict(i)
142                    assert record is not None
143                    group = lc.FindGroup(record[field])
144    
145    
146                if not group.IsVisible():
147                    continue
148    
149    
150              # don't recreate new objects if they are the same as before              # don't recreate new objects if they are the same as before
151              if prop != old_prop:              if group is not old_group:
152                  old_prop = prop                  old_group = group
153    
154                  if shapetype == SHAPETYPE_ARC:                  prop = group.GetProperties()
155                      fill = Color.None  
156                  else:                  if prop != old_prop:
157                      fill = prop.GetFill()                      old_prop = prop
158        
159                  if fill is Color.None:                      if shapetype == SHAPETYPE_ARC:
160                      brush = wxTRANSPARENT_BRUSH                          fill = Transparent
161                  else:                      else:
162                      color = Color2wxColour(fill)                          fill = prop.GetFill()
163                      brush = wxBrush(color, wxSOLID)  
164        
165                  stroke = prop.GetLineColor()                      if fill is Transparent:
166                  stroke_width = prop.GetLineWidth()                          brush = wxTRANSPARENT_BRUSH
167                  if stroke is Color.None:                      else:
168                      pen = wxTRANSPARENT_PEN                          color = Color2wxColour(fill)
169                  else:                          brush = wxBrush(color, wxSOLID)
170                      color = Color2wxColour(stroke)  
171                      pen = wxPen(color, stroke_width, wxSOLID)                      stroke = prop.GetLineColor()
172                            stroke_width = prop.GetLineWidth()
173              if shapetype == SHAPETYPE_POINT:                      if stroke is Transparent:
174                  self.dc.SetBrush(brush)                          pen = wxTRANSPARENT_PEN
175                  self.dc.SetPen(pen)                      else:
176                  self.draw_point_shape(layer, i)                          color = Color2wxColour(stroke)
177              else:                          pen = wxPen(color, stroke_width, wxSOLID)
178                  self.draw_polygon_shape(layer, i, pen, brush)  
179                draw_func(draw_func_param, i, pen, brush)
180    
181        def draw_raster_layer(self, layer):
182            data = None
183            offx, offy = self.offset
184            width, height = self.dc.GetSizeTuple()
185    
186            inProj = ""
187            proj = layer.GetProjection()
188            if proj is not None:
189                for p in proj.GetAllParameters():
190                    inProj += "+" + p + " "
191    
192            outProj = ""
193            proj = self.map.GetProjection()
194            if proj is not None:
195                for p in proj.GetAllParameters():
196                    outProj += "+" + p + " "
197    
198            xmin = (0 - offx) / self.scale
199            ymin = (offy - height) / self.scale
200            xmax = (width - offx) / self.scale
201            ymax = (offy - 0) / self.scale
202    
203            try:
204                data = ProjectRasterFile(
205                    layer.GetImageFilename(),
206                    inProj,
207                    outProj,
208                    (xmin, ymin, xmax, ymax),
209                    "", (width, height))
210            except IOError, (strerr):
211                print strerr
212            except (AttributeError, ValueError):
213                pass
214            else:
215                if data is not None:
216                    stream = cStringIO.StringIO(data)
217                    image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)
218                    bitmap = wxBitmapFromImage(image)
219                    self.dc.DrawBitmap(bitmap, 0, 0)
220    
221      def layer_ids(self, layer):      def layer_ids(self, layer):
222          """Return the shape ids of the given layer that have to be drawn.          """Return the shape ids of the given layer that have to be drawn.
223            
224          The default implementation simply returns all ids in the layer.          The default implementation simply returns all ids in the layer.
225          Override in derived classes to be more precise.          Override in derived classes to be more precise.
226          """          """
227          return range(layer.NumShapes())          return range(layer.NumShapes())
228    
229      def draw_polygon_shape(self, layer, index, pen, brush):      def polygon_render_param(self, layer):
230          offx, offy = self.offset                  """Return the low-lever render parameter for the layer"""
231          draw_polygon_shape(layer.shapefile.cobject(), index,          offx, offy = self.offset
232                             self.dc, pen, brush,          return draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,
233                             self.map.projection, layer.projection,                                   self.map.projection,
234                             self.scale, -self.scale, offx, offy)                                   layer.projection,
235                                     self.scale, -self.scale,
236                                     offx, offy)
237    
238        def draw_polygon_shape(self, draw_polygon_info, index, pen, brush):
239            draw_polygon_shape(draw_polygon_info, index, pen, brush)
240    
241      def projected_points(self, layer, index):      def projected_points(self, layer, index):
242          proj = self.map.projection          proj = self.map.GetProjection()
243          if proj is not None:          if proj is not None:
244              forward = proj.Forward              forward = proj.Forward
245          else:          else:
246              forward = None              forward = None
247          proj = layer.projection          proj = layer.GetProjection()
248          if proj is not None:          if proj is not None:
249              inverse = proj.Inverse              inverse = proj.Inverse
250          else:          else:
# Line 177  class MapRenderer: Line 266  class MapRenderer:
266          points = self.projected_points(layer, index)          points = self.projected_points(layer, index)
267          self.dc.DrawLines(points)          self.dc.DrawLines(points)
268    
269      def draw_point_shape(self, layer, index):      def draw_point_shape(self, layer, index, pen, brush):
270          p = self.projected_points(layer, index)[0]          pp = self.projected_points(layer, index)
271    
272            if len(pp) == 0: return # ignore Null Shapes which have no points
273    
274            p = pp[0]
275          radius = self.resolution * 5          radius = self.resolution * 5
276            self.dc.SetBrush(brush)
277            self.dc.SetPen(pen)
278          self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)          self.dc.DrawEllipse(p.x - radius, p.y - radius, 2*radius, 2*radius)
279    
280      def draw_label_layer(self, layer):      def draw_label_layer(self, layer):
# Line 226  class ScreenRenderer(MapRenderer): Line 321  class ScreenRenderer(MapRenderer):
321      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
322      honor_visibility = 1      honor_visibility = 1
323            
324      def RenderMap(self, map, region, selected_layer, selected_shape):      def RenderMap(self, map, region, selected_layer, selected_shapes):
325          """Render the map.          """Render the map.
326    
327          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
328          by a wxrect's asTuple method) needs to be redrawn. Highlight the          by a wxrect's asTuple method) needs to be redrawn. Highlight the
329          shape with id selected_shape in the selected_layer.          shapes given by the ids in selected_shapes in the
330            selected_layer.
331          """          """
332          self.update_region = region          self.update_region = region
333          self.selected_layer = selected_layer          self.selected_layer = selected_layer
334          self.selected_shape = selected_shape          self.selected_shapes = selected_shapes
335          self.render_map(map)          self.render_map(map)
336    
337      def draw_shape_layer(self, layer):      def draw_shape_layer(self, layer):
338          MapRenderer.draw_shape_layer(self, layer)          MapRenderer.draw_shape_layer(self, layer)
339          if layer is self.selected_layer and self.selected_shape is not None:          if layer is self.selected_layer and self.selected_shapes:
340              pen = wxPen(wxBLACK, 3, wxSOLID)              pen = wxPen(wxBLACK, 3, wxSOLID)
341              brush = wxBrush(wxBLACK, wxCROSS_HATCH)              brush = wxBrush(wxBLACK, wxCROSS_HATCH)
342                
343              shapetype = layer.ShapeType()              shapetype = layer.ShapeType()
             index = self.selected_shape  
344              if shapetype == SHAPETYPE_POLYGON:              if shapetype == SHAPETYPE_POLYGON:
345                  self.draw_polygon_shape(layer, index, pen, brush)                  offx, offy = self.offset
346                    renderparam = self.polygon_render_param(layer)
347                    func = self.draw_polygon_shape
348                    args = (pen, brush)
349              elif shapetype == SHAPETYPE_ARC:              elif shapetype == SHAPETYPE_ARC:
350                  self.draw_polygon_shape(layer, index, pen, None)                  renderparam = self.polygon_render_param(layer)
351              else:                  func = self.draw_polygon_shape
352                    args = (pen, None)
353                elif shapetype == SHAPETYPE_POINT:
354                    renderparam = layer
355                  self.dc.SetBrush(brush)                  self.dc.SetBrush(brush)
356                  self.dc.SetPen(pen)                  self.dc.SetPen(pen)
357                  if shapetype == SHAPETYPE_POINT:                  func = self.draw_point_shape
358                      self.draw_point_shape(layer, index)                  args = (pen, brush)
359                  else:              else:
360                      raise TypeError(_("Unhandled shape type %s") % shapetype)                  raise TypeError(_("Unhandled shape type %s") % shapetype)
361    
362                for index in self.selected_shapes:
363                    func(renderparam, index, *args)
364    
365      def layer_ids(self, layer):      def layer_ids(self, layer):
366          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
# Line 296  class ScreenRenderer(MapRenderer): Line 400  class ScreenRenderer(MapRenderer):
400          return layer.ShapesInRegion((left, bottom, right, top))          return layer.ShapesInRegion((left, bottom, right, top))
401    
402    
403  class PrinterRender(MapRenderer):  class ExportRenderer(ScreenRenderer):
   
     # When printing we want to see all layers  
     honor_visibility = 0  
404    
405      RenderMap = MapRenderer.render_map      honor_visibility = 1
406            
407        def RenderMap(self, map, region, mapregion,
408                      selected_layer, selected_shapes ):
409            """Render the map.
410    
411            The rendering device has been specified during initialisation.
412            The device border distance was set in Thuban.UI.view.OutputTranform().
413            
414            RenderMap renders a frame set (one page frame, one around
415            legend/scalebar and one around the map), the map, the legend and the
416            scalebar on the given DC. The map is rendered with the region displayed
417            in the canvas view, centered on the area available for map display.
418            """
419            
420            self.update_region = region
421            self.selected_layer = selected_layer
422            self.selected_shapes = selected_shapes
423    
424            # Get some dimensions
425            llx, lly, urx, ury = region
426            self.mapregion = mapregion
427            mminx, mminy, mmaxx, mmaxy = self.mapregion
428    
429            # Manipulate the offset to position the map
430            offx, offy = self.offset
431            # 1. Shift to corner of map drawing area
432            offx = offx + mminx
433            offy = offy + mminy
434    
435            # 2. Center the map on the map drawing area:
436            # region identifies the region on the canvas view:
437            # center of map drawing area - half the size of region: rendering origin
438            self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
439            self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
440    
441            self.offset = (offx+self.shiftx, offy+self.shifty)
442    
443            # Draw the map
444            self.dc.BeginDrawing()
445            self.dc.DestroyClippingRegion()
446            self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
447                                      urx, ury)
448            self.render_map(map)
449            self.dc.EndDrawing()
450    
451            # Draw the rest (frames, legend, scalebar)
452            self.dc.BeginDrawing()
453            self.dc.DestroyClippingRegion()
454    
455            # Force the font for Legend drawing
456            font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
457            self.dc.SetFont(font)
458    
459            self.render_frame(region)
460            self.render_legend(map)
461            self.render_scalebar(map)
462            self.dc.EndDrawing()
463    
464        def render_frame(self, region):
465            """Render the frames for map and legend/scalebar."""
466    
467            dc = self.dc
468            dc.SetPen(wxBLACK_PEN)
469            dc.SetBrush(wxTRANSPARENT_BRUSH)
470    
471            # Dimension stuff
472            width, height = dc.GetSizeTuple()
473            mminx, mminy, mmaxx, mmaxy = self.mapregion
474    
475            # Page Frame
476            dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
477            
478            # Map Frame
479            llx, lly, urx, ury = region
480            dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
481            
482            # Legend Frame
483            dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
484    
485            dc.DestroyClippingRegion()
486            dc.SetClippingRegion(mmaxx+10,mminy,
487                                 (width-20) - (mmaxx+10), mmaxy-mminy)
488    
489        def render_legend(self, map):
490            """Render the legend on the Map."""
491    
492            previewer = ClassDataPreviewer()
493            dc = self.dc
494            dc.SetPen(wxBLACK_PEN)
495            dc.SetBrush(wxTRANSPARENT_BRUSH)
496    
497            # Dimension stuff
498            width, height = dc.GetSizeTuple()
499            mminx, mminy, mmaxx, mmaxy = self.mapregion
500            textwidth, textheight = dc.GetTextExtent("0")
501            iconwidth  = textheight
502            iconheight = textheight
503            stepy = textheight+3
504            dx = 10
505            posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
506                                    # 5 pix inside legend frame
507            posy = mminy + 5        # 5 pix inside legend frame
508            
509            # Render the legend
510            dc.SetTextForeground(wxBLACK)
511            if map.HasLayers():
512                layers = map.Layers()
513                layers.reverse()
514                for l in layers:
515                    if l.Visible():
516                        # Render title
517                        dc.DrawText(l.Title(), posx, posy)
518                        posy+=stepy
519                        if l.HasClassification():
520                            # Render classification
521                            clazz = l.GetClassification()
522                            shapeType = l.ShapeType()
523                            for g in clazz:
524                                if g.IsVisible():
525                                    previewer.Draw(dc,
526                                        wxRect(posx+dx, posy,
527                                               iconwidth, iconheight),
528                                        g.GetProperties(), shapeType)
529                                    dc.DrawText(g.GetDisplayText(),
530                                                posx+2*dx+iconwidth, posy)
531                                    posy+=stepy
532            
533        def render_scalebar(self, map):
534            """Render the scalebar."""
535    
536            scalebar = ScaleBar(map)
537    
538            # Dimension stuff
539            width, height = self.dc.GetSizeTuple()
540            mminx, mminy, mmaxx, mmaxy = self.mapregion
541          
542            # Render the scalebar
543            scalebar.DrawScaleBar(self.scale, self.dc,
544                                 (mmaxx+10+5, mmaxy-25),
545                                 ((width-15-5) - (mmaxx+10+5),20)
546                                )
547            # 10 pix between map and legend frame, 5 pix inside legend frame
548            # 25 pix from the legend frame bottom line
549            # Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
550            # Height: 20
551    
552    class PrinterRenderer(ExportRenderer):
553    
554        # Printing as well as Export / Screen display only the visible layer.
555        honor_visibility = 1
556    
Legend:
Removed from v.468  
changed lines
  Added in v.1467
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