/[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 2668 by jan, Thu Aug 18 21:54:25 2005 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.
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            """Returns a raster layer image in projected space
121    
122            Based on a given filename.  This method must be implemented in
123            classes derived from BaseRenderer.
124            """
125    
126            ret = None
127    
128            if Thuban.Model.resource.has_gdal_support():
129    
130                if versions['wxPython-tuple'] < (2,5,3):
131                    options = options | 4  # INVERT_MASK_BITS
132                    options = options & ~2 # ALPHA_MASK not supported
133    
134                try:
135                    ret = ProjectRasterFile(layer.GetImageFilename(),
136                                            srcProj, dstProj,
137                                            extents, resolution, dimensions,
138                                            options)
139                except (MemoryError, IOError, AttributeError, ValueError):
140                    # Why does this catch AttributeError and ValueError?
141                    # FIXME: The exception should be communicated to the user
142                    # better.
143                    traceback.print_exc()
144    
145            return ret
146    
147        def draw_raster_data(self, x,y, data, format = 'BMP', opacity=1.0):
148    
149            mask = None
150            alpha = None
151            width = data[0]
152            height = data[1]
153            image_data, mask_data, alpha_data = data[2]
154    
155            if versions['wxPython-tuple'] < (2,5,3):
156                alpha_data = None
157    
158            if format == 'RAW':
159                image = wxEmptyImage(width, height)
160                image.SetData(image_data)
161                if mask_data is not None:
162                    mask = wxBitmapFromBits(mask_data, width, height, 1)
163                    mask = wxMask(mask)
164                elif alpha_data is not None:
165                    # alpha_data is already in the right format
166                    alpha = alpha_data
167    
168            else:
169                stream = cStringIO.StringIO(image_data)
170                image = wxImageFromStream(stream, raster_format_map[format])
171    
172                if mask_data is not None:
173                    stream = cStringIO.StringIO(mask_data)
174                    mask = wxImageFromStream(stream, raster_format_map[format])
175                    mask = wxMask(wxBitmapFromImage(mask, 1))
176                elif alpha_data is not None:
177                    stream = cStringIO.StringIO(alpha_data)
178                    alpha = wxImageFromStream(stream, raster_format_map[format])
179                    alpha = alpha.GetData() #[:] # XXX: do we need to copy this?
180                elif image.HasAlpha():
181                    alpha = image.GetAlphaData()
182    
183            #
184            # scale down the alpha values the opacity level using a string
185            # translation table for efficiency.
186            #
187            if alpha is not None:
188                if opacity == 0:
189                    return
190                elif opacity == 1:
191                    a = alpha
192                else:
193                    tr = [int(i*opacity) for i in range(256)]
194                    table = array.array('B', tr).tostring()
195                    a = alpha.translate(table)
196    
197                image.SetAlphaData(a)
198    
     def draw_raster_data(self, data):  
         stream = cStringIO.StringIO(data)  
         image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)  
199          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
200          self.dc.DrawBitmap(bitmap, 0, 0)  
201            if mask is not None:
202                bitmap.SetMask(mask)
203    
204            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
205    
206    
207  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 91  class ScreenRenderer(MapRenderer): Line 209  class ScreenRenderer(MapRenderer):
209      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
210      honor_visibility = 1      honor_visibility = 1
211    
212      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
213          """Render the map.          """Render the map.
214    
215          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 217  class ScreenRenderer(MapRenderer):
217          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
218          selected_layer.          selected_layer.
219          """          """
         self.update_region = region  
220          self.selected_layer = selected_layer          self.selected_layer = selected_layer
221          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
222          self.render_map(map)          self.render_map()
223    
224        def RenderMapIncrementally(self):
225            """Render the map.
226    
227            Only the given region (a tuple in window coordinates as returned
228            by a wxrect's asTuple method) needs to be redrawn. Highlight the
229            shapes given by the ids in selected_shapes in the
230            selected_layer.
231            """
232            return self.render_map_incrementally()
233    
234        def draw_selection_incrementally(self, layer, selected_shapes):
235            """Draw the selected shapes in a emphasized way (i.e.
236            with a special pen and brush.
237            The drawing is performed incrementally, that means every
238            n shapes, the user can have interactions with the map.
239            n is currently fixed to 500.
240    
241            layer -- the layer where the shapes belong to.
242            selected_shapes -- a list of the shape-ids representing the
243                               selected shapes for the given layer.
244            """
245            pen = wxPen(wxBLACK, 3, wxSOLID)
246            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
247    
248            shapetype = layer.ShapeType()
249            useraw, func, param = self.low_level_renderer(layer)
250            args = (pen, brush)
251    
252      def draw_shape_layer(self, layer):          # for point shapes we need to find out the properties
253          MapRenderer.draw_shape_layer(self, layer)          # to determine the size. Based on table and field,
254          if layer is self.selected_layer and self.selected_shapes:          # we can find out the properties for object - see below.
255              pen = wxPen(wxBLACK, 3, wxSOLID)          if shapetype == SHAPETYPE_POINT:
256              brush = wxBrush(wxBLACK, wxCROSS_HATCH)              lc = layer.GetClassification()
257                field = layer.GetClassificationColumn()
258              shapetype = layer.ShapeType()              table = layer.ShapeStore().Table()
259              func, param = self.low_level_renderer(layer)  
260              args = (pen, brush)          count = 0
261              for index in self.selected_shapes:          for index in selected_shapes:
262                  func(param, index, *args)              count += 1
263                shape = layer.Shape(index)
264    
265                # Get the size of the specific property for this
266                # point
267                if shapetype == SHAPETYPE_POINT:
268                    if field is not None:
269                        value = table.ReadValue(shape.ShapeID(), field)
270                        group = lc.FindGroup(value)
271                        size = group.GetProperties().GetSize()
272                    else:
273                        size = lc.GetDefaultGroup().GetProperties().GetSize()
274                    args = (pen, brush, size)
275    
276                if useraw:
277                    data = shape.RawData()
278                else:
279                    data = shape.Points()
280                func(param, data, *args)
281                if count % 500 == 0:
282                    yield True
283    
284      def layer_ids(self, layer):      def layer_shapes(self, layer):
285          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
286    
287          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 302  class ScreenRenderer(MapRenderer):
302          offx, offy = self.offset          offx, offy = self.offset
303          xs = []          xs = []
304          ys = []          ys = []
305          x, y, width, height = self.update_region          x, y, width, height = self.region
306          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
307                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
308              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 158  class ExportRenderer(ScreenRenderer): Line 323  class ExportRenderer(ScreenRenderer):
323    
324      honor_visibility = 1      honor_visibility = 1
325    
326      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
327                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
328    
329            In addition to all parameters of the the ScreenRender
330            constructor, this class requires and additional keyword argument
331            destination_region with a tuple (minx, miny, maxx, maxy) giving
332            the region in dc coordinates which is to contain the map.
333            """
334            self.destination_region = kw["destination_region"]
335            del kw["destination_region"]
336            ScreenRenderer.__init__(self, *args, **kw)
337    
338        def RenderMap(self, selected_layer, selected_shapes):
339          """Render the map.          """Render the map.
340    
341          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
342          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
343            Thuban.UI.viewport.output_transform().
344    
345          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
346          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
347          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
348          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
349            available for map display.
350          """          """
351    
         self.update_region = region  
352          self.selected_layer = selected_layer          self.selected_layer = selected_layer
353          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
354    
355          # Get some dimensions          # Get some dimensions
356          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
357          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
358    
359          # Manipulate the offset to position the map          # Manipulate the offset to position the map
360          offx, offy = self.offset          offx, offy = self.offset
# Line 193  class ExportRenderer(ScreenRenderer): Line 369  class ExportRenderer(ScreenRenderer):
369          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
370    
371          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
372            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
373    
374          # Draw the map          # Draw the map
375          self.dc.BeginDrawing()          self.dc.BeginDrawing()
376          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
377          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
378                                    urx, ury)                                    urx, ury)
379          self.render_map(map)          self.render_map()
380          self.dc.EndDrawing()          self.dc.EndDrawing()
381    
382          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 210  class ExportRenderer(ScreenRenderer): Line 387  class ExportRenderer(ScreenRenderer):
387          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
388          self.dc.SetFont(font)          self.dc.SetFont(font)
389    
390          self.render_frame(region)          self.render_frame()
391          self.render_legend(map)          self.render_legend()
392          self.render_scalebar(map)          self.render_scalebar()
393          self.dc.EndDrawing()          self.dc.EndDrawing()
394    
395      def render_frame(self, region):      def render_frame(self):
396          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
397    
398          dc = self.dc          dc = self.dc
# Line 224  class ExportRenderer(ScreenRenderer): Line 401  class ExportRenderer(ScreenRenderer):
401    
402          # Dimension stuff          # Dimension stuff
403          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
404          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
405    
406          # Page Frame          # Page Frame
407          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
408    
409          # Map Frame          # Map Frame
410          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
411          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
412    
413          # Legend Frame          # Legend Frame
# Line 240  class ExportRenderer(ScreenRenderer): Line 417  class ExportRenderer(ScreenRenderer):
417          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
418                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
419    
420      def render_legend(self, map):      def render_legend(self):
421          """Render the legend on the Map."""          """Render the legend on the Map."""
422    
423          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 250  class ExportRenderer(ScreenRenderer): Line 427  class ExportRenderer(ScreenRenderer):
427    
428          # Dimension stuff          # Dimension stuff
429          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
430          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
431          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
432          iconwidth  = textheight          iconwidth  = textheight
433          iconheight = textheight          iconheight = textheight
# Line 262  class ExportRenderer(ScreenRenderer): Line 439  class ExportRenderer(ScreenRenderer):
439    
440          # Render the legend          # Render the legend
441          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
442          if map.HasLayers():          if self.map.HasLayers():
443              layers = map.Layers()              layers = self.map.Layers()[:]
444              layers.reverse()              layers.reverse()
445              for l in layers:              for l in layers:
446                  if l.Visible():                  if l.Visible():
# Line 284  class ExportRenderer(ScreenRenderer): Line 461  class ExportRenderer(ScreenRenderer):
461                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
462                                  posy+=stepy                                  posy+=stepy
463    
464      def render_scalebar(self, map):      def render_scalebar(self):
465          """Render the scalebar."""          """Render the scalebar."""
466    
467          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
468    
469          # Dimension stuff          # Dimension stuff
470          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
471          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
472    
473          # Render the scalebar          # Render the scalebar
474          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
Legend:
Removed from v.1552  
changed lines
  Added in v.2668
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