/[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 641 by jonathan, Thu Apr 10 14:36:19 2003 UTC revision 909 by frank, Fri May 16 16:23:12 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    
 from wxPython.wx import wxPoint, wxPen, wxBrush, wxFont, \  
      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \  
      wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL  
   
 from wxproj import draw_polygon_shape  
   
12  from Thuban import _  from Thuban import _
13  from Thuban.UI.common import *  
14    from wxPython.wx import wxMemoryDC, wxEmptyBitmap, \
15        wxPoint, wxRect, wxPen, wxBrush, wxFont, \
16        wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
17        wxBLACK_PEN, wxRED_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL
18    
19    from wxproj import draw_polygon_shape, draw_polygon_init
20    
21    from Thuban.UI.common import Color2wxColour
22    from Thuban.UI.classifier import ClassDataPreviewer
23    from Thuban.UI.scalebar import ScaleBar
24    
25  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
26       SHAPETYPE_POINT       SHAPETYPE_POINT
# Line 25  from Thuban.Model.label import ALIGN_CEN Line 30  from Thuban.Model.label import ALIGN_CEN
30  from Thuban.Model.classification import Classification  from Thuban.Model.classification import Classification
31  from Thuban.Model.color import Color  from Thuban.Model.color import Color
32    
   
33  class MapRenderer:  class MapRenderer:
34    
35      """Class to render a map onto a wxDC"""      """Class to render a map onto a wxDC"""
# Line 49  class MapRenderer: Line 53  class MapRenderer:
53          """          """
54          # resolution in pixel/inch          # resolution in pixel/inch
55    
         assert scale > 0  
   
56          self.dc = dc          self.dc = dc
57          self.scale = scale          self.scale = scale
58          self.offset = offset          self.offset = offset
# Line 82  class MapRenderer: Line 84  class MapRenderer:
84          pen   = wxTRANSPARENT_PEN          pen   = wxTRANSPARENT_PEN
85    
86          old_prop = None          old_prop = None
87            old_group = None
88          lc = layer.GetClassification()          lc = layer.GetClassification()
89          field = lc.GetField()          field = lc.GetField()
90            defaultGroup = lc.GetDefaultGroup()
91    
         defaultProps = lc.GetDefaultGroup().GetProperties()  
92    
93          for i in self.layer_ids(layer):          if shapetype != SHAPETYPE_POINT:
94              value = None              polygon_render_param = self.polygon_render_param(layer)
95    
96              if field is not None:          if shapetype == SHAPETYPE_POINT:
97                  try:              draw_func = lambda i: \
98                      record = layer.table.read_record(i)                     self.draw_point_shape(layer, i)
99                      if record is not None:          else:
100                          value = record[field]              draw_func = lambda i: \
101                  except:                     self.draw_polygon_shape(polygon_render_param, i, pen, brush)
102                      pass              
103            for i in self.layer_ids(layer):
                 #  
                 # if the above statements fail 'value' should  
                 # be null, at which point this call will  
                 # at least retreive the NullData  
                 #  
   
                 group = lc.FindGroup(value)  
                 if not group.IsVisible():  
                     continue  
104    
105                  #prop = lc.GetProperties(value)              if field is None:
106                  prop = group.GetProperties()                  group = defaultGroup
107              else:              else:
108                  prop = defaultProps                  record = layer.table.ReadRowAsDict(i)
109                    assert record is not None
110                    group = lc.FindGroup(record[field])
111    
112    
113                if not group.IsVisible():
114                    continue
115    
116    
117              # don't recreate new objects if they are the same as before              # don't recreate new objects if they are the same as before
118              if prop != old_prop:              if group is not old_group:
119                  old_prop = prop                  old_group = group
120    
121                  if shapetype == SHAPETYPE_ARC:                  prop = group.GetProperties()
122                      fill = Color.Transparent  
123                  else:                  if prop != old_prop:
124                      fill = prop.GetFill()                      old_prop = prop
125        
126                  if fill is Color.Transparent:                      if shapetype == SHAPETYPE_ARC:
127                      brush = wxTRANSPARENT_BRUSH                          fill = Color.Transparent
128                  else:                      else:
129                      color = Color2wxColour(fill)                          fill = prop.GetFill()
130                      brush = wxBrush(color, wxSOLID)  
131        
132                  stroke = prop.GetLineColor()                      if fill is Color.Transparent:
133                  stroke_width = prop.GetLineWidth()                          brush = wxTRANSPARENT_BRUSH
134                  if stroke is Color.Transparent:                      else:
135                      pen = wxTRANSPARENT_PEN                          color = Color2wxColour(fill)
136                  else:                          brush = wxBrush(color, wxSOLID)
137                      color = Color2wxColour(stroke)  
138                      pen = wxPen(color, stroke_width, wxSOLID)                      stroke = prop.GetLineColor()
139                            stroke_width = prop.GetLineWidth()
140              if shapetype == SHAPETYPE_POINT:                      if stroke is Color.Transparent:
141                  self.dc.SetBrush(brush)                          pen = wxTRANSPARENT_PEN
142                  self.dc.SetPen(pen)                      else:
143                  self.draw_point_shape(layer, i)                          color = Color2wxColour(stroke)
144              else:                          pen = wxPen(color, stroke_width, wxSOLID)
145                  self.draw_polygon_shape(layer, i, pen, brush)  
146                        if shapetype == SHAPETYPE_POINT:
147                            self.dc.SetBrush(brush)
148                            self.dc.SetPen(pen)
149    
150                draw_func(i)
151    
152      def layer_ids(self, layer):      def layer_ids(self, layer):
153          """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.
154            
155          The default implementation simply returns all ids in the layer.          The default implementation simply returns all ids in the layer.
156          Override in derived classes to be more precise.          Override in derived classes to be more precise.
157          """          """
158          return range(layer.NumShapes())          return range(layer.NumShapes())
159    
160      def draw_polygon_shape(self, layer, index, pen, brush):      def polygon_render_param(self, layer):
161          offx, offy = self.offset                  """Return the low-lever render parameter for the layer"""
162          draw_polygon_shape(layer.shapefile.cobject(), index,          offx, offy = self.offset
163                             self.dc, pen, brush,          return draw_polygon_init(layer.shapefile, self.dc,
164                             self.map.projection, layer.projection,                                   self.map.projection,
165                             self.scale, -self.scale, offx, offy)                                   layer.projection,
166                                     self.scale, -self.scale,
167                                     offx, offy)
168    
169        def draw_polygon_shape(self, draw_polygon_info, index, pen, brush):
170            draw_polygon_shape(draw_polygon_info, index, pen, brush)
171    
172      def projected_points(self, layer, index):      def projected_points(self, layer, index):
173          proj = self.map.projection          proj = self.map.GetProjection()
174          if proj is not None:          if proj is not None:
175              forward = proj.Forward              forward = proj.Forward
176          else:          else:
177              forward = None              forward = None
178          proj = layer.projection          proj = layer.GetProjection()
179          if proj is not None:          if proj is not None:
180              inverse = proj.Inverse              inverse = proj.Inverse
181          else:          else:
# Line 260  class ScreenRenderer(MapRenderer): Line 271  class ScreenRenderer(MapRenderer):
271    
272              shapetype = layer.ShapeType()              shapetype = layer.ShapeType()
273              if shapetype == SHAPETYPE_POLYGON:              if shapetype == SHAPETYPE_POLYGON:
274                    offx, offy = self.offset
275                    renderparam = self.polygon_render_param(layer)
276                  func = self.draw_polygon_shape                  func = self.draw_polygon_shape
277                  args = (pen, brush)                  args = (pen, brush)
278              elif shapetype == SHAPETYPE_ARC:              elif shapetype == SHAPETYPE_ARC:
279                    renderparam = self.polygon_render_param(layer)
280                  func = self.draw_polygon_shape                  func = self.draw_polygon_shape
281                  args = (pen, None)                  args = (pen, None)
282              elif shapetype == SHAPETYPE_POINT:              elif shapetype == SHAPETYPE_POINT:
283                    renderparam = layer
284                  self.dc.SetBrush(brush)                  self.dc.SetBrush(brush)
285                  self.dc.SetPen(pen)                  self.dc.SetPen(pen)
286                  func = self.draw_point_shape                  func = self.draw_point_shape
# Line 274  class ScreenRenderer(MapRenderer): Line 289  class ScreenRenderer(MapRenderer):
289                  raise TypeError(_("Unhandled shape type %s") % shapetype)                  raise TypeError(_("Unhandled shape type %s") % shapetype)
290    
291              for index in self.selected_shapes:              for index in self.selected_shapes:
292                  func(layer, index, *args)                  func(renderparam, index, *args)
293    
294    
295      def layer_ids(self, layer):      def layer_ids(self, layer):
296          """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 314  class ScreenRenderer(MapRenderer): Line 330  class ScreenRenderer(MapRenderer):
330          return layer.ShapesInRegion((left, bottom, right, top))          return layer.ShapesInRegion((left, bottom, right, top))
331    
332    
333  class PrinterRender(MapRenderer):  class ExportRenderer(ScreenRenderer):
   
     # When printing we want to see all layers  
     honor_visibility = 0  
334    
335      RenderMap = MapRenderer.render_map      honor_visibility = 1
336            
337        def RenderMap(self, map, region, mapregion,
338                      selected_layer, selected_shapes ):
339            """Render the map.
340    
341            The rendering device has been specified during initialisation.
342            The device border distance was set in Thuban.UI.view.OutputTranform().
343            
344            RenderMap renders a frame set (one page frame, one around
345            legend/scalebar and one around the map), the map, the legend and the
346            scalebar on the given DC. The map is rendered with the region displayed
347            in the canvas view, centered on the area available for map display.
348            """
349            
350            self.update_region = region
351            self.selected_layer = selected_layer
352            self.selected_shapes = selected_shapes
353    
354            # Get some dimensions
355            llx, lly, urx, ury = region
356            self.mapregion = mapregion
357            mminx, mminy, mmaxx, mmaxy = self.mapregion
358    
359            # Manipulate the offset to position the map
360            offx, offy = self.offset
361            # 1. Shift to corner of map drawing area
362            offx = offx + mminx
363            offy = offy + mminy
364    
365            # 2. Center the map on the map drawing area:
366            # region identifies the region on the canvas view:
367            # center of map drawing area - half the size of region: rendering origin
368            self.shiftx = (mmaxx - mminx)*0.5 - (urx - llx)*0.5
369            self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
370    
371            self.offset = (offx+self.shiftx, offy+self.shifty)
372    
373            # Draw the map
374            self.dc.BeginDrawing()
375            self.dc.DestroyClippingRegion()
376            self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
377                                      urx, ury)
378            self.render_map(map)
379            self.dc.EndDrawing()
380    
381            # Draw the rest (frames, legend, scalebar)
382            self.dc.BeginDrawing()
383            self.dc.DestroyClippingRegion()
384    
385            # Force the font for Legend drawing
386            font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
387            self.dc.SetFont(font)
388    
389            self.render_frame(region)
390            self.render_legend(map)
391            self.render_scalebar(map)
392            self.dc.EndDrawing()
393    
394        def render_frame(self, region):
395            """Render the frames for map and legend/scalebar."""
396    
397            dc = self.dc
398            dc.SetPen(wxBLACK_PEN)
399            dc.SetBrush(wxTRANSPARENT_BRUSH)
400    
401            # Dimension stuff
402            width, height = dc.GetSizeTuple()
403            mminx, mminy, mmaxx, mmaxy = self.mapregion
404    
405            # Page Frame
406            dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
407            
408            # Map Frame
409            llx, lly, urx, ury = region
410            dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
411            
412            # Legend Frame
413            dc.DrawRectangle(mmaxx+10,mminy,(width-20) - (mmaxx+10), mmaxy-mminy)
414    
415            dc.DestroyClippingRegion()
416            dc.SetClippingRegion(mmaxx+10,mminy,
417                                 (width-20) - (mmaxx+10), mmaxy-mminy)
418    
419        def render_legend(self, map):
420            """Render the legend on the Map."""
421    
422            previewer = ClassDataPreviewer()
423            dc = self.dc
424            dc.SetPen(wxBLACK_PEN)
425            dc.SetBrush(wxTRANSPARENT_BRUSH)
426    
427            # Dimension stuff
428            width, height = dc.GetSizeTuple()
429            mminx, mminy, mmaxx, mmaxy = self.mapregion
430            textwidth, textheight = dc.GetTextExtent("0")
431            iconwidth  = textheight
432            iconheight = textheight
433            stepy = textheight+3
434            dx = 10
435            posx = mmaxx + 10 + 5   # 10 pix distance mapframe/legend frame,
436                                    # 5 pix inside legend frame
437            posy = mminy + 5        # 5 pix inside legend frame
438            
439            # Render the legend
440            dc.SetTextForeground(wxBLACK)
441            if map.HasLayers():
442                for l in map.Layers():
443                    if l.Visible():
444                        # Render title
445                        dc.DrawText(l.Title(), posx, posy)
446                        posy+=stepy
447                        # Render classification
448                        clazz = l.GetClassification()
449                        shapeType = l.ShapeType()
450                        for g in clazz:
451                            if g.IsVisible():
452                                previewer.Draw(dc,
453                                    wxRect(posx+dx, posy, iconwidth, iconheight),
454                                    g.GetProperties(), shapeType)
455                                dc.DrawText(g.GetDisplayText(),
456                                            posx+2*dx+iconwidth, posy)
457                                posy+=stepy
458            
459        def render_scalebar(self, map):
460            """Render the scalebar."""
461    
462            scalebar = ScaleBar(map)
463    
464            # Dimension stuff
465            width, height = self.dc.GetSizeTuple()
466            mminx, mminy, mmaxx, mmaxy = self.mapregion
467          
468            # Render the scalebar
469            scalebar.DrawScaleBar(self.scale, self.dc,
470                                 (mmaxx+10+5, mmaxy-25),
471                                 ((width-15-5) - (mmaxx+10+5),20)
472                                )
473            # 10 pix between map and legend frame, 5 pix inside legend frame
474            # 25 pix from the legend frame bottom line
475            # Width: 15 pix from DC border, 5 pix inside frame, 10, 5 as above
476            # Height: 20
477    
478    class PrinterRenderer(ExportRenderer):
479    
480        # Printing as well as Export / Screen display only the visible layer.
481        honor_visibility = 1
482    
Legend:
Removed from v.641  
changed lines
  Added in v.909
[email protected]
 ViewVC Help
Powered by ViewVC 1.1.26