/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1937 by bh, Tue Nov 11 18:16:42 2003 UTC revision 2454 by bh, Mon Dec 13 18:26:11 2004 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.
# Line 20  from Thuban import _ Line 21  from Thuban import _
21  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
22      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
23      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
24      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, wxBITMAP_TYPE_JPEG      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
25        wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, wxBITMAP_TYPE_GIF
26    
27  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
28    
# Line 42  from baserenderer import BaseRenderer Line 44  from baserenderer import BaseRenderer
44  raster_format_map = {  raster_format_map = {
45      "BMP": wxBITMAP_TYPE_BMP,      "BMP": wxBITMAP_TYPE_BMP,
46      "JPEG": wxBITMAP_TYPE_JPEG,      "JPEG": wxBITMAP_TYPE_JPEG,
47        "PNG": wxBITMAP_TYPE_PNG,
48        "TIFF": wxBITMAP_TYPE_TIF,
49        "GIF": wxBITMAP_TYPE_GIF,
50      }      }
51    
52  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
# Line 129  class ScreenRenderer(MapRenderer): Line 134  class ScreenRenderer(MapRenderer):
134          return self.render_map_incrementally()          return self.render_map_incrementally()
135    
136      def draw_selection_incrementally(self, layer, selected_shapes):      def draw_selection_incrementally(self, layer, selected_shapes):
137            """Draw the selected shapes in a emphasized way (i.e.
138            with a special pen and brush.
139            The drawing is performed incrementally, that means every
140            n shapes, the user can have interactions with the map.
141            n is currently fixed to 500.
142    
143            layer -- the layer where the shapes belong to.
144            selected_shapes -- a list of the shape-ids representing the
145                               selected shapes for the given layer.
146            """
147          pen = wxPen(wxBLACK, 3, wxSOLID)          pen = wxPen(wxBLACK, 3, wxSOLID)
148          brush = wxBrush(wxBLACK, wxCROSS_HATCH)          brush = wxBrush(wxBLACK, wxCROSS_HATCH)
149    
150          shapetype = layer.ShapeType()          shapetype = layer.ShapeType()
151          useraw, func, param = self.low_level_renderer(layer)          useraw, func, param = self.low_level_renderer(layer)
152          args = (pen, brush)          args = (pen, brush)
153    
154            # for point shapes we need to find out the properties
155            # to determine the size. Based on table and field,
156            # we can find out the properties for object - see below.
157            if shapetype == SHAPETYPE_POINT:
158                lc = layer.GetClassification()
159                field = layer.GetClassificationColumn()
160                table = layer.ShapeStore().Table()
161    
162          count = 0          count = 0
163          for index in selected_shapes:          for index in selected_shapes:
164              count += 1              count += 1
165              shape = layer.Shape(index)              shape = layer.Shape(index)
166    
167                # Get the size of the specific property for this
168                # point
169                if shapetype == SHAPETYPE_POINT:
170                    value = table.ReadValue(shape.ShapeID(), field)
171                    group = lc.FindGroup(value)
172                    size = group.GetProperties().GetSize()
173                    args = (pen, brush, size)
174    
175              if useraw:              if useraw:
176                  data = shape.RawData()                  data = shape.RawData()
177              else:              else:
# Line 235  class ExportRenderer(ScreenRenderer): Line 268  class ExportRenderer(ScreenRenderer):
268          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
269    
270          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
271            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
272    
273          # Draw the map          # Draw the map
274          self.dc.BeginDrawing()          self.dc.BeginDrawing()
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