/[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 2618 by jonathan, Fri May 6 14:18:31 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            """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 and field is not None:
268                    value = table.ReadValue(shape.ShapeID(), field)
269                    group = lc.FindGroup(value)
270                    size = group.GetProperties().GetSize()
271                    args = (pen, brush, size)
272    
273                if useraw:
274                    data = shape.RawData()
275                else:
276                    data = shape.Points()
277                func(param, data, *args)
278                if count % 500 == 0:
279                    yield True
280    
281      def layer_ids(self, layer):      def layer_shapes(self, layer):
282          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
283    
284          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 299  class ScreenRenderer(MapRenderer):
299          offx, offy = self.offset          offx, offy = self.offset
300          xs = []          xs = []
301          ys = []          ys = []
302          x, y, width, height = self.update_region          x, y, width, height = self.region
303          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
304                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
305              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 158  class ExportRenderer(ScreenRenderer): Line 320  class ExportRenderer(ScreenRenderer):
320    
321      honor_visibility = 1      honor_visibility = 1
322    
323      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
324                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
325    
326            In addition to all parameters of the the ScreenRender
327            constructor, this class requires and additional keyword argument
328            destination_region with a tuple (minx, miny, maxx, maxy) giving
329            the region in dc coordinates which is to contain the map.
330            """
331            self.destination_region = kw["destination_region"]
332            del kw["destination_region"]
333            ScreenRenderer.__init__(self, *args, **kw)
334    
335        def RenderMap(self, selected_layer, selected_shapes):
336          """Render the map.          """Render the map.
337    
338          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
339          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
340            Thuban.UI.viewport.output_transform().
341    
342          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
343          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
344          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
345          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
346            available for map display.
347          """          """
348    
         self.update_region = region  
349          self.selected_layer = selected_layer          self.selected_layer = selected_layer
350          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
351    
352          # Get some dimensions          # Get some dimensions
353          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
354          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
355    
356          # Manipulate the offset to position the map          # Manipulate the offset to position the map
357          offx, offy = self.offset          offx, offy = self.offset
# Line 193  class ExportRenderer(ScreenRenderer): Line 366  class ExportRenderer(ScreenRenderer):
366          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
367    
368          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
369            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
370    
371          # Draw the map          # Draw the map
372          self.dc.BeginDrawing()          self.dc.BeginDrawing()
373          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
374          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
375                                    urx, ury)                                    urx, ury)
376          self.render_map(map)          self.render_map()
377          self.dc.EndDrawing()          self.dc.EndDrawing()
378    
379          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 210  class ExportRenderer(ScreenRenderer): Line 384  class ExportRenderer(ScreenRenderer):
384          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
385          self.dc.SetFont(font)          self.dc.SetFont(font)
386    
387          self.render_frame(region)          self.render_frame()
388          self.render_legend(map)          self.render_legend()
389          self.render_scalebar(map)          self.render_scalebar()
390          self.dc.EndDrawing()          self.dc.EndDrawing()
391    
392      def render_frame(self, region):      def render_frame(self):
393          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
394    
395          dc = self.dc          dc = self.dc
# Line 224  class ExportRenderer(ScreenRenderer): Line 398  class ExportRenderer(ScreenRenderer):
398    
399          # Dimension stuff          # Dimension stuff
400          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
401          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
402    
403          # Page Frame          # Page Frame
404          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
405    
406          # Map Frame          # Map Frame
407          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
408          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
409    
410          # Legend Frame          # Legend Frame
# Line 240  class ExportRenderer(ScreenRenderer): Line 414  class ExportRenderer(ScreenRenderer):
414          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
415                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
416    
417      def render_legend(self, map):      def render_legend(self):
418          """Render the legend on the Map."""          """Render the legend on the Map."""
419    
420          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 250  class ExportRenderer(ScreenRenderer): Line 424  class ExportRenderer(ScreenRenderer):
424    
425          # Dimension stuff          # Dimension stuff
426          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
427          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
428          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
429          iconwidth  = textheight          iconwidth  = textheight
430          iconheight = textheight          iconheight = textheight
# Line 262  class ExportRenderer(ScreenRenderer): Line 436  class ExportRenderer(ScreenRenderer):
436    
437          # Render the legend          # Render the legend
438          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
439          if map.HasLayers():          if self.map.HasLayers():
440              layers = map.Layers()              layers = self.map.Layers()[:]
441              layers.reverse()              layers.reverse()
442              for l in layers:              for l in layers:
443                  if l.Visible():                  if l.Visible():
# Line 284  class ExportRenderer(ScreenRenderer): Line 458  class ExportRenderer(ScreenRenderer):
458                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
459                                  posy+=stepy                                  posy+=stepy
460    
461      def render_scalebar(self, map):      def render_scalebar(self):
462          """Render the scalebar."""          """Render the scalebar."""
463    
464          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
465    
466          # Dimension stuff          # Dimension stuff
467          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
468          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
469    
470          # Render the scalebar          # Render the scalebar
471          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
Legend:
Removed from v.1552  
changed lines
  Added in v.2618
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