/[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 1593 by bh, Fri Aug 15 14:10:27 2003 UTC revision 2601 by joey, Sat Apr 23 16:40:33 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.
10    
11    from __future__ import generators
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    # $Source$
15    # $Id$
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, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
26      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
27      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
28      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
29        wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
30        wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits
31    
32  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
33    
# Line 32  import Thuban.Model.resource Line 43  import Thuban.Model.resource
43    
44  from baserenderer import BaseRenderer  from baserenderer import BaseRenderer
45    
46    from math import floor
47    
48    from types import StringType
49    
50    from Thuban.version import versions
51    
52    if Thuban.Model.resource.has_gdal_support():
53        from gdalwarp import ProjectRasterFile
54    
55    
56    # Map the strings used for the format parameter of the draw_raster_data
57    # method to the appropriate wxWindows constants
58    raster_format_map = {
59        "BMP": wxBITMAP_TYPE_BMP,
60        "JPEG": wxBITMAP_TYPE_JPEG,
61        "PNG": wxBITMAP_TYPE_PNG,
62        "TIFF": wxBITMAP_TYPE_TIF,
63        "GIF": wxBITMAP_TYPE_GIF,
64        }
65    
66  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
67    
68      """Class to render a map onto a wxDC"""      """Class to render a map onto a wxDC"""
# Line 39  class MapRenderer(BaseRenderer): Line 70  class MapRenderer(BaseRenderer):
70      TRANSPARENT_PEN = wxTRANSPARENT_PEN      TRANSPARENT_PEN = wxTRANSPARENT_PEN
71      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
72    
73      make_point = wxPoint      def make_point(self, x, y):
74            return wxPoint(int(round(x)), int(round(y)))
75    
76      def tools_for_property(self, prop):      def tools_for_property(self, prop):
77          fill = prop.GetFill()          fill = prop.GetFill()
# Line 69  class MapRenderer(BaseRenderer): Line 101  class MapRenderer(BaseRenderer):
101          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
102              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
103              offx, offy = self.offset              offx, offy = self.offset
104                x = lambda a, b, c, d: None
105                #return (True, x, None)
106              return (True, draw_polygon_shape,              return (True, draw_polygon_shape,
107                      draw_polygon_init(layer.ShapeStore().Shapefile(),                      draw_polygon_init(layer.ShapeStore().Shapefile(),
108                                        self.dc, self.map.projection,                                        self.dc, self.map.projection,
# Line 78  class MapRenderer(BaseRenderer): Line 112  class MapRenderer(BaseRenderer):
112              return BaseRenderer.low_level_renderer(self, layer)              return BaseRenderer.low_level_renderer(self, layer)
113    
114      def label_font(self):      def label_font(self):
115          return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
116                          wxNORMAL)
117    
118        def projected_raster_layer(self, layer, srcProj, dstProj, extents,
119                                   resolution, dimensions, options):
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, layer, x,y, data, format = 'BMP'):
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 = wxEmptyImage(width, height)
155                image.SetData(image_data)
156                if mask_data is not None:
157                    mask = wxBitmapFromBits(mask_data, width, height, 1)
158                    mask = wxMask(mask)
159                elif alpha_data is not None:
160                    # alpha_data is already in the right format
161                    alpha = alpha_data
162    
163            else:
164                stream = cStringIO.StringIO(image_data)
165                image = wxImageFromStream(stream, raster_format_map[format])
166                if mask_data is not None:
167                    stream = cStringIO.StringIO(mask_data)
168                    mask = wxImageFromStream(stream, raster_format_map[format])
169                    mask = wxMask(wxBitmapFromImage(mask, 1))
170                elif alpha_data is not None:
171                    stream = cStringIO.StringIO(alpha_data)
172                    alpha = wxImageFromStream(stream, raster_format_map[format])
173                    alpha = alpha.GetData()[:] # XXX: do we need to copy this?
174    
175            #
176            # if we are using the alpha_data then scale down the alpha values
177            # by the layer's opacity using a string translation table
178            #
179            if alpha is not None:
180                lo = layer.Opacity()
181                if lo == 0:
182                    return
183                elif lo == 1:
184                    a = alpha
185                else:
186                    tr = [int(i*lo) for i in range(256)]
187                    table = array.array('B', tr).tostring()
188                    a = alpha.translate(table)
189    
190                image.SetAlphaData(a)
191    
     def draw_raster_data(self, data):  
         stream = cStringIO.StringIO(data)  
         image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)  
192          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
193          self.dc.DrawBitmap(bitmap, 0, 0)  
194            if mask is not None:
195                bitmap.SetMask(mask)
196    
197            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
198    
199    
200  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 92  class ScreenRenderer(MapRenderer): Line 202  class ScreenRenderer(MapRenderer):
202      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
203      honor_visibility = 1      honor_visibility = 1
204    
205      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
206          """Render the map.          """Render the map.
207    
208          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 100  class ScreenRenderer(MapRenderer): Line 210  class ScreenRenderer(MapRenderer):
210          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
211          selected_layer.          selected_layer.
212          """          """
         self.update_region = region  
213          self.selected_layer = selected_layer          self.selected_layer = selected_layer
214          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
215          self.render_map(map)          self.render_map()
216    
217      def draw_shape_layer(self, layer):      def RenderMapIncrementally(self):
218          MapRenderer.draw_shape_layer(self, layer)          """Render the map.
219          if layer is self.selected_layer and self.selected_shapes:  
220              pen = wxPen(wxBLACK, 3, wxSOLID)          Only the given region (a tuple in window coordinates as returned
221              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
222            shapes given by the ids in selected_shapes in the
223              shapetype = layer.ShapeType()          selected_layer.
224              useraw, func, param = self.low_level_renderer(layer)          """
225              args = (pen, brush)          return self.render_map_incrementally()
226              for index in self.selected_shapes:  
227                  shape = layer.Shape(index)      def draw_selection_incrementally(self, layer, selected_shapes):
228                  if useraw:          """Draw the selected shapes in a emphasized way (i.e.
229                      data = shape.RawData()          with a special pen and brush.
230                  else:          The drawing is performed incrementally, that means every
231                      data = shape.Points()          n shapes, the user can have interactions with the map.
232                  func(param, data, *args)          n is currently fixed to 500.
233    
234            layer -- the layer where the shapes belong to.
235            selected_shapes -- a list of the shape-ids representing the
236                               selected shapes for the given layer.
237            """
238            pen = wxPen(wxBLACK, 3, wxSOLID)
239            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
240    
241            shapetype = layer.ShapeType()
242            useraw, func, param = self.low_level_renderer(layer)
243            args = (pen, brush)
244    
245            # for point shapes we need to find out the properties
246            # to determine the size. Based on table and field,
247            # we can find out the properties for object - see below.
248            if shapetype == SHAPETYPE_POINT:
249                lc = layer.GetClassification()
250                field = layer.GetClassificationColumn()
251                table = layer.ShapeStore().Table()
252    
253            count = 0
254            for index in selected_shapes:
255                count += 1
256                shape = layer.Shape(index)
257    
258                # Get the size of the specific property for this
259                # point
260                if shapetype == SHAPETYPE_POINT and field is not None:
261                    value = table.ReadValue(shape.ShapeID(), field)
262                    group = lc.FindGroup(value)
263                    size = group.GetProperties().GetSize()
264                    args = (pen, brush, size)
265    
266                if useraw:
267                    data = shape.RawData()
268                else:
269                    data = shape.Points()
270                func(param, data, *args)
271                if count % 500 == 0:
272                    yield True
273    
274      def layer_shapes(self, layer):      def layer_shapes(self, layer):
275          """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 143  class ScreenRenderer(MapRenderer): Line 292  class ScreenRenderer(MapRenderer):
292          offx, offy = self.offset          offx, offy = self.offset
293          xs = []          xs = []
294          ys = []          ys = []
295          x, y, width, height = self.update_region          x, y, width, height = self.region
296          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
297                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
298              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 164  class ExportRenderer(ScreenRenderer): Line 313  class ExportRenderer(ScreenRenderer):
313    
314      honor_visibility = 1      honor_visibility = 1
315    
316      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
317                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
318    
319            In addition to all parameters of the the ScreenRender
320            constructor, this class requires and additional keyword argument
321            destination_region with a tuple (minx, miny, maxx, maxy) giving
322            the region in dc coordinates which is to contain the map.
323            """
324            self.destination_region = kw["destination_region"]
325            del kw["destination_region"]
326            ScreenRenderer.__init__(self, *args, **kw)
327    
328        def RenderMap(self, selected_layer, selected_shapes):
329          """Render the map.          """Render the map.
330    
331          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
332          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
333            Thuban.UI.viewport.output_transform().
334    
335          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
336          legend/scalebar and one around the map), the map, the legend and the          legend/scalebar and one around the map), the map, the legend and
337          scalebar on the given DC. The map is rendered with the region displayed          the scalebar on the given DC. The map is rendered with the
338          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
339            available for map display.
340          """          """
341    
         self.update_region = region  
342          self.selected_layer = selected_layer          self.selected_layer = selected_layer
343          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
344    
345          # Get some dimensions          # Get some dimensions
346          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
347          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
348    
349          # Manipulate the offset to position the map          # Manipulate the offset to position the map
350          offx, offy = self.offset          offx, offy = self.offset
# Line 199  class ExportRenderer(ScreenRenderer): Line 359  class ExportRenderer(ScreenRenderer):
359          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
360    
361          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
362            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
363    
364          # Draw the map          # Draw the map
365          self.dc.BeginDrawing()          self.dc.BeginDrawing()
366          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
367          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
368                                    urx, ury)                                    urx, ury)
369          self.render_map(map)          self.render_map()
370          self.dc.EndDrawing()          self.dc.EndDrawing()
371    
372          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 216  class ExportRenderer(ScreenRenderer): Line 377  class ExportRenderer(ScreenRenderer):
377          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
378          self.dc.SetFont(font)          self.dc.SetFont(font)
379    
380          self.render_frame(region)          self.render_frame()
381          self.render_legend(map)          self.render_legend()
382          self.render_scalebar(map)          self.render_scalebar()
383          self.dc.EndDrawing()          self.dc.EndDrawing()
384    
385      def render_frame(self, region):      def render_frame(self):
386          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
387    
388          dc = self.dc          dc = self.dc
# Line 230  class ExportRenderer(ScreenRenderer): Line 391  class ExportRenderer(ScreenRenderer):
391    
392          # Dimension stuff          # Dimension stuff
393          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
394          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
395    
396          # Page Frame          # Page Frame
397          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
398    
399          # Map Frame          # Map Frame
400          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
401          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
402    
403          # Legend Frame          # Legend Frame
# Line 246  class ExportRenderer(ScreenRenderer): Line 407  class ExportRenderer(ScreenRenderer):
407          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
408                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
409    
410      def render_legend(self, map):      def render_legend(self):
411          """Render the legend on the Map."""          """Render the legend on the Map."""
412    
413          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 256  class ExportRenderer(ScreenRenderer): Line 417  class ExportRenderer(ScreenRenderer):
417    
418          # Dimension stuff          # Dimension stuff
419          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
420          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
421          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
422          iconwidth  = textheight          iconwidth  = textheight
423          iconheight = textheight          iconheight = textheight
# Line 268  class ExportRenderer(ScreenRenderer): Line 429  class ExportRenderer(ScreenRenderer):
429    
430          # Render the legend          # Render the legend
431          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
432          if map.HasLayers():          if self.map.HasLayers():
433              layers = map.Layers()              layers = self.map.Layers()[:]
434              layers.reverse()              layers.reverse()
435              for l in layers:              for l in layers:
436                  if l.Visible():                  if l.Visible():
# Line 290  class ExportRenderer(ScreenRenderer): Line 451  class ExportRenderer(ScreenRenderer):
451                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
452                                  posy+=stepy                                  posy+=stepy
453    
454      def render_scalebar(self, map):      def render_scalebar(self):
455          """Render the scalebar."""          """Render the scalebar."""
456    
457          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
458    
459          # Dimension stuff          # Dimension stuff
460          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
461          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
462    
463          # Render the scalebar          # Render the scalebar
464          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
Legend:
Removed from v.1593  
changed lines
  Added in v.2601
[email protected]
 ViewVC Help
Powered by ViewVC 1.1.26