/[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 2700 by dpinte, Mon Sep 18 14:27:02 2006 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001-2005 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]> (2003-2005)
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 15  __version__ = "$Revision$" Line 16  __version__ = "$Revision$"
16    
17  import cStringIO  import cStringIO
18    
19    import array
20    
21    import traceback
22    
23  from Thuban import _  from Thuban import _
24    
25  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \  import wx
     wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \  
     wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \  
     wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, wxBITMAP_TYPE_JPEG  
26    
27  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
28    
# Line 36  import Thuban.Model.resource Line 38  import Thuban.Model.resource
38    
39  from baserenderer import BaseRenderer  from baserenderer import BaseRenderer
40    
41    from math import floor
42    
43    from types import StringType
44    
45    from Thuban.version import versions
46    
47    if Thuban.Model.resource.has_gdal_support():
48        from gdalwarp import ProjectRasterFile
49    
50    
51  # 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
52  # method to the appropriate wxWindows constants  # method to the appropriate wxWindows constants
53  raster_format_map = {  raster_format_map = {
54      "BMP": wxBITMAP_TYPE_BMP,      "BMP": wx.BITMAP_TYPE_BMP,
55      "JPEG": wxBITMAP_TYPE_JPEG,      "JPEG": wx.BITMAP_TYPE_JPEG,
56        "PNG": wx.BITMAP_TYPE_PNG,
57        "TIFF": wx.BITMAP_TYPE_TIF,
58        "GIF": wx.BITMAP_TYPE_GIF,
59      }      }
60    
61  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
62    
63      """Class to render a map onto a wxDC"""      """Class to render a map onto a wxDC"""
64    
65      TRANSPARENT_PEN = wxTRANSPARENT_PEN      TRANSPARENT_PEN = wx.TRANSPARENT_PEN
66      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH      TRANSPARENT_BRUSH = wx.TRANSPARENT_BRUSH
67    
68      def make_point(self, x, y):      def make_point(self, x, y):
69          return wxPoint(int(round(x)), int(round(y)))          return wx.Point(int(round(x)), int(round(y)))
70    
71      def tools_for_property(self, prop):      def tools_for_property(self, prop):
72          fill = prop.GetFill()          fill = prop.GetFill()
73          if fill is Transparent:          if fill is Transparent:
74              brush = self.TRANSPARENT_BRUSH              brush = self.TRANSPARENT_BRUSH
75          else:          else:
76              brush = wxBrush(Color2wxColour(fill), wxSOLID)              brush = wx.Brush(Color2wxColour(fill), wx.SOLID)
77    
78          stroke = prop.GetLineColor()          stroke = prop.GetLineColor()
79          if stroke is Transparent:          if stroke is Transparent:
80              pen = self.TRANSPARENT_PEN              pen = self.TRANSPARENT_PEN
81          else:          else:
82              pen = wxPen(Color2wxColour(stroke), prop.GetLineWidth(), wxSOLID)              pen = wx.Pen(Color2wxColour(stroke), prop.GetLineWidth(), wx.SOLID)
83          return pen, brush          return pen, brush
84    
85      def low_level_renderer(self, layer):      def low_level_renderer(self, layer):
# Line 82  class MapRenderer(BaseRenderer): Line 96  class MapRenderer(BaseRenderer):
96          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
97              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
98              offx, offy = self.offset              offx, offy = self.offset
99                x = lambda a, b, c, d: None
100                #return (True, x, None)
101              return (True, draw_polygon_shape,              return (True, draw_polygon_shape,
102                      draw_polygon_init(layer.ShapeStore().Shapefile(),                      draw_polygon_init(layer.ShapeStore().Shapefile(),
103                                        self.dc, self.map.projection,                                        self.dc, self.map.projection,
# Line 91  class MapRenderer(BaseRenderer): Line 107  class MapRenderer(BaseRenderer):
107              return BaseRenderer.low_level_renderer(self, layer)              return BaseRenderer.low_level_renderer(self, layer)
108    
109      def label_font(self):      def label_font(self):
110          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,          return wx.Font(int(round(self.resolution * 10)), wx.SWISS, wx.NORMAL,
111                        wxNORMAL)                        wx.NORMAL)
112    
113        def projected_raster_layer(self, layer, srcProj, dstProj, extents,
114                                   resolution, dimensions, options):
115            """Returns a raster layer image in projected space
116    
117            Based on a given filename.  This method must be implemented in
118            classes derived from BaseRenderer.
119            """
120    
121            ret = None
122    
123            if Thuban.Model.resource.has_gdal_support():
124    
125                if versions['wxPython-tuple'] < (2,5,3):
126                    options = options | 4  # INVERT_MASK_BITS
127                    options = options & ~2 # ALPHA_MASK not supported
128    
129                try:
130                    ret = ProjectRasterFile(layer.GetImageFilename(),
131                                            srcProj, dstProj,
132                                            extents, resolution, dimensions,
133                                            options)
134                except (MemoryError, IOError, AttributeError, ValueError):
135                    # Why does this catch AttributeError and ValueError?
136                    # FIXME: The exception should be communicated to the user
137                    # better.
138                    traceback.print_exc()
139    
140            return ret
141    
142        def draw_raster_data(self, x,y, data, format = 'BMP', opacity=1.0):
143    
144            mask = None
145            alpha = None
146            width = data[0]
147            height = data[1]
148            image_data, mask_data, alpha_data = data[2]
149    
150            if versions['wxPython-tuple'] < (2,5,3):
151                alpha_data = None
152    
153            if format == 'RAW':
154                image = wx.EmptyImage(width, height)
155                image.SetData(image_data)
156                if mask_data is not None:
157                    mask = wx.BitmapFromBits(mask_data, width, height, 1)
158                    mask = wx.Mask(mask)
159                elif alpha_data is not None:
160                    # alpha_data is already in the right format
161                    alpha = alpha_data
162    
163      def draw_raster_data(self, data, format = 'BMP'):          else:
164          stream = cStringIO.StringIO(data)              stream = cStringIO.StringIO(image_data)
165          image = wxImageFromStream(stream, raster_format_map[format])              image = wx.ImageFromStream(stream, raster_format_map[format])
166          bitmap = wxBitmapFromImage(image)  
167          self.dc.DrawBitmap(bitmap, 0, 0)              if mask_data is not None:
168                    stream = cStringIO.StringIO(mask_data)
169                    mask = wx.ImageFromStream(stream, raster_format_map[format])
170                    mask = wx.Mask(wx.BitmapFromImage(mask, 1))
171                elif alpha_data is not None:
172                    stream = cStringIO.StringIO(alpha_data)
173                    alpha = wx.ImageFromStream(stream, raster_format_map[format])
174                    alpha = alpha.GetData() #[:] # XXX: do we need to copy this?
175                elif image.HasAlpha():
176                    alpha = image.GetAlphaData()
177    
178            #
179            # scale down the alpha values the opacity level using a string
180            # translation table for efficiency.
181            #
182            if alpha is not None:
183                if opacity == 0:
184                    return
185                elif opacity == 1:
186                    a = alpha
187                else:
188                    tr = [int(i*opacity) for i in range(256)]
189                    table = array.array('B', tr).tostring()
190                    a = alpha.translate(table)
191    
192                image.SetAlphaData(a)
193    
194            bitmap = wx.BitmapFromImage(image)
195    
196            if mask is not None:
197                bitmap.SetMask(mask)
198    
199            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
200    
201    
202  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 129  class ScreenRenderer(MapRenderer): Line 227  class ScreenRenderer(MapRenderer):
227          return self.render_map_incrementally()          return self.render_map_incrementally()
228    
229      def draw_selection_incrementally(self, layer, selected_shapes):      def draw_selection_incrementally(self, layer, selected_shapes):
230          pen = wxPen(wxBLACK, 3, wxSOLID)          """Draw the selected shapes in a emphasized way (i.e.
231          brush = wxBrush(wxBLACK, wxCROSS_HATCH)          with a special pen and brush.
232            The drawing is performed incrementally, that means every
233            n shapes, the user can have interactions with the map.
234            n is currently fixed to 500.
235    
236            layer -- the layer where the shapes belong to.
237            selected_shapes -- a list of the shape-ids representing the
238                               selected shapes for the given layer.
239            """
240            pen = wx.Pen(wx.BLACK, 3, wx.SOLID)
241            brush = wx.Brush(wx.BLACK, wx.CROSS_HATCH)
242    
243          shapetype = layer.ShapeType()          shapetype = layer.ShapeType()
244          useraw, func, param = self.low_level_renderer(layer)          useraw, func, param = self.low_level_renderer(layer)
245          args = (pen, brush)          args = (pen, brush)
246    
247            # for point shapes we need to find out the properties
248            # to determine the size. Based on table and field,
249            # we can find out the properties for object - see below.
250            if shapetype == SHAPETYPE_POINT:
251                lc = layer.GetClassification()
252                field = layer.GetClassificationColumn()
253                table = layer.ShapeStore().Table()
254    
255          count = 0          count = 0
256          for index in selected_shapes:          for index in selected_shapes:
257              count += 1              count += 1
258              shape = layer.Shape(index)              shape = layer.Shape(index)
259    
260                # Get the size of the specific property for this
261                # point
262                if shapetype == SHAPETYPE_POINT:
263                    if field is not None:
264                        value = table.ReadValue(shape.ShapeID(), field)
265                        group = lc.FindGroup(value)
266                        size = group.GetProperties().GetSize()
267                    else:
268                        size = lc.GetDefaultGroup().GetProperties().GetSize()
269                    args = (pen, brush, size)
270    
271              if useraw:              if useraw:
272                  data = shape.RawData()                  data = shape.RawData()
273              else:              else:
# Line 235  class ExportRenderer(ScreenRenderer): Line 364  class ExportRenderer(ScreenRenderer):
364          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
365    
366          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
367            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
368    
369          # Draw the map          # Draw the map
370          self.dc.BeginDrawing()          self.dc.BeginDrawing()
# Line 249  class ExportRenderer(ScreenRenderer): Line 379  class ExportRenderer(ScreenRenderer):
379          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
380    
381          # Force the font for Legend drawing          # Force the font for Legend drawing
382          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wx.Font(self.resolution * 10, wx.SWISS, wx.NORMAL, wx.NORMAL)
383          self.dc.SetFont(font)          self.dc.SetFont(font)
384    
385          self.render_frame()          self.render_frame()
# Line 261  class ExportRenderer(ScreenRenderer): Line 391  class ExportRenderer(ScreenRenderer):
391          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
392    
393          dc = self.dc          dc = self.dc
394          dc.SetPen(wxBLACK_PEN)          dc.SetPen(wx.BLACK_PEN)
395          dc.SetBrush(wxTRANSPARENT_BRUSH)          dc.SetBrush(wx.TRANSPARENT_BRUSH)
396    
397          # Dimension stuff          # Dimension stuff
398          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
# Line 287  class ExportRenderer(ScreenRenderer): Line 417  class ExportRenderer(ScreenRenderer):
417    
418          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
419          dc = self.dc          dc = self.dc
420          dc.SetPen(wxBLACK_PEN)          dc.SetPen(wx.BLACK_PEN)
421          dc.SetBrush(wxTRANSPARENT_BRUSH)          dc.SetBrush(wx.TRANSPARENT_BRUSH)
422    
423          # Dimension stuff          # Dimension stuff
424          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
# Line 303  class ExportRenderer(ScreenRenderer): Line 433  class ExportRenderer(ScreenRenderer):
433          posy = mminy + 5        # 5 pix inside legend frame          posy = mminy + 5        # 5 pix inside legend frame
434    
435          # Render the legend          # Render the legend
436          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wx.BLACK)
437          if self.map.HasLayers():          if self.map.HasLayers():
438              layers = self.map.Layers()[:]              layers = self.map.Layers()[:]
439              layers.reverse()              layers.reverse()
# Line 319  class ExportRenderer(ScreenRenderer): Line 449  class ExportRenderer(ScreenRenderer):
449                          for g in clazz:                          for g in clazz:
450                              if g.IsVisible():                              if g.IsVisible():
451                                  previewer.Draw(dc,                                  previewer.Draw(dc,
452                                      wxRect(posx+dx, posy,                                      wx.Rect(posx+dx, posy,
453                                             iconwidth, iconheight),                                             iconwidth, iconheight),
454                                      g.GetProperties(), shapeType)                                      g.GetProperties(), shapeType)
455                                  dc.DrawText(g.GetDisplayText(),                                  dc.DrawText(g.GetDisplayText(),
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