/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1552 by bh, Wed Aug 6 17:21:32 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 24  from Thuban.UI.common import Color2wxCol Line 35  from Thuban.UI.common import Color2wxCol
35  from Thuban.UI.classifier import ClassDataPreviewer  from Thuban.UI.classifier import ClassDataPreviewer
36  from Thuban.UI.scalebar import ScaleBar  from Thuban.UI.scalebar import ScaleBar
37    
38  from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT  from Thuban.Model.data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
39         SHAPETYPE_POINT, RAW_SHAPEFILE
40    
41  from Thuban.Model.color import Transparent  from Thuban.Model.color import Transparent
42  import Thuban.Model.resource  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 38  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 57  class MapRenderer(BaseRenderer): Line 90  class MapRenderer(BaseRenderer):
90      def low_level_renderer(self, layer):      def low_level_renderer(self, layer):
91          """Override inherited method to provide more efficient renderers          """Override inherited method to provide more efficient renderers
92    
93          For point shapes, return self.draw_point_shape and layer just as          If the underlying data format is not a shapefile or the layer
94          the base class method. For arc and polygon use the more          contains points shapes, simply use what the inherited method
95          efficient wxproj.draw_polygon_shape and its corresponding          returns.
96          parameter created with wxproj.draw_polygon_init.  
97            Otherwise, i.e. for arc and polygon use the more efficient
98            wxproj.draw_polygon_shape and its corresponding parameter
99            created with wxproj.draw_polygon_init.
100          """          """
101          shapetype = layer.ShapeType()          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
102          if shapetype == SHAPETYPE_POINT:              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
             func = self.draw_point_shape  
             param = layer  
         else:  
103              offx, offy = self.offset              offx, offy = self.offset
104              param = draw_polygon_init(layer.ShapeStore().Shapefile(), self.dc,              x = lambda a, b, c, d: None
105                                        self.map.projection,              #return (True, x, None)
106                return (True, draw_polygon_shape,
107                        draw_polygon_init(layer.ShapeStore().Shapefile(),
108                                          self.dc, self.map.projection,
109                                        layer.projection,                                        layer.projection,
110                                        self.scale, -self.scale,                                        self.scale, -self.scale, offx, offy))
111                                        offx, offy)          else:
112              func = draw_polygon_shape              return BaseRenderer.low_level_renderer(self, layer)
         return func, param  
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 91  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 99  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 RenderMapIncrementally(self):
218            """Render the map.
219    
220            Only the given region (a tuple in window coordinates as returned
221            by a wxrect's asTuple method) needs to be redrawn. Highlight the
222            shapes given by the ids in selected_shapes in the
223            selected_layer.
224            """
225            return self.render_map_incrementally()
226    
227      def draw_shape_layer(self, layer):      def draw_selection_incrementally(self, layer, selected_shapes):
228          MapRenderer.draw_shape_layer(self, layer)          """Draw the selected shapes in a emphasized way (i.e.
229          if layer is self.selected_layer and self.selected_shapes:          with a special pen and brush.
230              pen = wxPen(wxBLACK, 3, wxSOLID)          The drawing is performed incrementally, that means every
231              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          n shapes, the user can have interactions with the map.
232            n is currently fixed to 500.
233              shapetype = layer.ShapeType()  
234              func, param = self.low_level_renderer(layer)          layer -- the layer where the shapes belong to.
235              args = (pen, brush)          selected_shapes -- a list of the shape-ids representing the
236              for index in self.selected_shapes:                             selected shapes for the given layer.
237                  func(param, index, *args)          """
238            pen = wxPen(wxBLACK, 3, wxSOLID)
239            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
240    
241      def layer_ids(self, layer):          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):
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
276    
277          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 137  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 158  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 193  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 210  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 224  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 240  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 250  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 262  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 284  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.1552  
changed lines
  Added in v.2601
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