/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1927 by bh, Mon Nov 10 16:57:35 2003 UTC revision 2552 by jonathan, Fri Jan 28 15:54:00 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.
# 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, \
26        wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits
27    
28  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
29    
# Line 36  import Thuban.Model.resource Line 39  import Thuban.Model.resource
39    
40  from baserenderer import BaseRenderer  from baserenderer import BaseRenderer
41    
42    from math import floor
43    
44    from types import StringType
45    
46    
47  # Map the strings used for the format parameter of the draw_raster_data  # Map the strings used for the format parameter of the draw_raster_data
48  # method to the appropriate wxWindows constants  # method to the appropriate wxWindows constants
49  raster_format_map = {  raster_format_map = {
50      "BMP": wxBITMAP_TYPE_BMP,      "BMP": wxBITMAP_TYPE_BMP,
51      "JPEG": wxBITMAP_TYPE_JPEG,      "JPEG": wxBITMAP_TYPE_JPEG,
52        "PNG": wxBITMAP_TYPE_PNG,
53        "TIFF": wxBITMAP_TYPE_TIF,
54        "GIF": wxBITMAP_TYPE_GIF,
55      }      }
56    
57  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
# Line 51  class MapRenderer(BaseRenderer): Line 61  class MapRenderer(BaseRenderer):
61      TRANSPARENT_PEN = wxTRANSPARENT_PEN      TRANSPARENT_PEN = wxTRANSPARENT_PEN
62      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
63    
64      make_point = wxPoint      def make_point(self, x, y):
65            return wxPoint(int(round(x)), int(round(y)))
66    
67      def tools_for_property(self, prop):      def tools_for_property(self, prop):
68          fill = prop.GetFill()          fill = prop.GetFill()
# Line 90  class MapRenderer(BaseRenderer): Line 101  class MapRenderer(BaseRenderer):
101              return BaseRenderer.low_level_renderer(self, layer)              return BaseRenderer.low_level_renderer(self, layer)
102    
103      def label_font(self):      def label_font(self):
104          return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
105                          wxNORMAL)
106    
107        def draw_raster_data(self, x,y, data, format = 'BMP'):
108    
109            mask = None
110    
111            if format == 'RAW':
112                image = wxEmptyImage(data[0], data[1])
113                image.SetData(data[2][0])
114                if data[2][1] is not None:
115                    mask = wxBitmapFromBits(data[2][1], data[0], data[1], 1)
116                    mask = wxMask(mask)
117            else:
118                stream = cStringIO.StringIO(data[2][0])
119                image = wxImageFromStream(stream, raster_format_map[format])
120                if data[2][1] is not None:
121                    stream = cStringIO.StringIO(data[2][1])
122                    mask = wxImageFromStream(stream, raster_format_map[format])
123                    mask = wxMask(wxBitmapFromImage(mask, 1))
124    
     def draw_raster_data(self, data, format = 'BMP'):  
         stream = cStringIO.StringIO(data)  
         image = wxImageFromStream(stream, raster_format_map[format])  
125          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
126          self.dc.DrawBitmap(bitmap, 0, 0)          bitmap.SetMask(mask)
127    
128            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
129    
130    
131  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 127  class ScreenRenderer(MapRenderer): Line 156  class ScreenRenderer(MapRenderer):
156          return self.render_map_incrementally()          return self.render_map_incrementally()
157    
158      def draw_selection_incrementally(self, layer, selected_shapes):      def draw_selection_incrementally(self, layer, selected_shapes):
159            """Draw the selected shapes in a emphasized way (i.e.
160            with a special pen and brush.
161            The drawing is performed incrementally, that means every
162            n shapes, the user can have interactions with the map.
163            n is currently fixed to 500.
164    
165            layer -- the layer where the shapes belong to.
166            selected_shapes -- a list of the shape-ids representing the
167                               selected shapes for the given layer.
168            """
169          pen = wxPen(wxBLACK, 3, wxSOLID)          pen = wxPen(wxBLACK, 3, wxSOLID)
170          brush = wxBrush(wxBLACK, wxCROSS_HATCH)          brush = wxBrush(wxBLACK, wxCROSS_HATCH)
171    
172          shapetype = layer.ShapeType()          shapetype = layer.ShapeType()
173          useraw, func, param = self.low_level_renderer(layer)          useraw, func, param = self.low_level_renderer(layer)
174          args = (pen, brush)          args = (pen, brush)
175    
176            # for point shapes we need to find out the properties
177            # to determine the size. Based on table and field,
178            # we can find out the properties for object - see below.
179            if shapetype == SHAPETYPE_POINT:
180                lc = layer.GetClassification()
181                field = layer.GetClassificationColumn()
182                table = layer.ShapeStore().Table()
183    
184          count = 0          count = 0
185          for index in selected_shapes:          for index in selected_shapes:
186              count += 1              count += 1
187              shape = layer.Shape(index)              shape = layer.Shape(index)
188    
189                # Get the size of the specific property for this
190                # point
191                if shapetype == SHAPETYPE_POINT and field is not None:
192                    value = table.ReadValue(shape.ShapeID(), field)
193                    group = lc.FindGroup(value)
194                    size = group.GetProperties().GetSize()
195                    args = (pen, brush, size)
196    
197              if useraw:              if useraw:
198                  data = shape.RawData()                  data = shape.RawData()
199              else:              else:
# Line 233  class ExportRenderer(ScreenRenderer): Line 290  class ExportRenderer(ScreenRenderer):
290          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
291    
292          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
293            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
294    
295          # Draw the map          # Draw the map
296          self.dc.BeginDrawing()          self.dc.BeginDrawing()
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