/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 686 by bh, Wed Apr 16 13:22:25 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    
12  from wxPython.wx import wxPoint, wxPen, wxBrush, wxFont, \  from Thuban import _
13       wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \  
14       wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL  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  from wxproj import draw_polygon_shape, draw_polygon_init
20    
21  from Thuban import _  from Thuban.UI.common import Color2wxColour
22  from Thuban.UI.common import *  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    
92    
93          if shapetype != SHAPETYPE_POINT:          if shapetype != SHAPETYPE_POINT:
94              polygon_render_param = self.polygon_render_param(layer)              polygon_render_param = self.polygon_render_param(layer)
95    
96            if shapetype == SHAPETYPE_POINT:
97                draw_func = lambda i: \
98                       self.draw_point_shape(layer, i)
99            else:
100                draw_func = lambda i: \
101                       self.draw_polygon_shape(polygon_render_param, i, pen, brush)
102                
103          for i in self.layer_ids(layer):          for i in self.layer_ids(layer):
             value = None  
   
             if field is not None:  
                 try:  
                     record = layer.table.read_record(i)  
                     if record is not None:  
                         value = record[field]  
                 except:  
                     pass  
   
                 #  
                 # if the above statements fail 'value' should  
                 # be null, at which point this call will  
                 # at least retreive the NullData  
                 #  
104    
105                  group = lc.FindGroup(value)              if field is None:
106                    group = defaultGroup
                 #prop = lc.GetProperties(value)  
107              else:              else:
108                  group = lc.GetDefaultGroup()                  record = layer.table.ReadRowAsDict(i)
109                    assert record is not None
110                    group = lc.FindGroup(record[field])
111    
112    
113              if not group.IsVisible():              if not group.IsVisible():
114                  continue                  continue
115    
             prop = group.GetProperties()  
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()
                     fill = Color.Transparent  
                 else:  
                     fill = prop.GetFill()  
   
   
                 if fill is Color.Transparent:  
                     brush = wxTRANSPARENT_BRUSH  
                 else:  
                     color = Color2wxColour(fill)  
                     brush = wxBrush(color, wxSOLID)  
   
                 stroke = prop.GetLineColor()  
                 stroke_width = prop.GetLineWidth()  
                 if stroke is Color.Transparent:  
                     pen = wxTRANSPARENT_PEN  
                 else:  
                     color = Color2wxColour(stroke)  
                     pen = wxPen(color, stroke_width, wxSOLID)  
122    
123                    if prop != old_prop:
124                        old_prop = prop
125    
126              if shapetype == SHAPETYPE_POINT:                      if shapetype == SHAPETYPE_ARC:
127                  self.dc.SetBrush(brush)                          fill = Color.Transparent
128                  self.dc.SetPen(pen)                      else:
129                  self.draw_point_shape(layer, i)                          fill = prop.GetFill()
130              else:  
131                  self.draw_polygon_shape(polygon_render_param, i, pen, brush)  
132                        if fill is Color.Transparent:
133                            brush = wxTRANSPARENT_BRUSH
134                        else:
135                            color = Color2wxColour(fill)
136                            brush = wxBrush(color, wxSOLID)
137    
138                        stroke = prop.GetLineColor()
139                        stroke_width = prop.GetLineWidth()
140                        if stroke is Color.Transparent:
141                            pen = wxTRANSPARENT_PEN
142                        else:
143                            color = Color2wxColour(stroke)
144                            pen = wxPen(color, stroke_width, wxSOLID)
145    
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.
# Line 171  class MapRenderer: Line 170  class MapRenderer:
170          draw_polygon_shape(draw_polygon_info, index, pen, brush)          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 331  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):
334    
335      # When printing we want to see all layers      honor_visibility = 1
     honor_visibility = 0  
   
     RenderMap = MapRenderer.render_map  
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.686  
changed lines
  Added in v.909
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