/[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 2602 by joey, Mon Apr 25 15:01:48 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, layer, x,y, data, format = 'BMP'):
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                if mask_data is not None:
172                    stream = cStringIO.StringIO(mask_data)
173                    mask = wxImageFromStream(stream, raster_format_map[format])
174                    mask = wxMask(wxBitmapFromImage(mask, 1))
175                elif alpha_data is not None:
176                    stream = cStringIO.StringIO(alpha_data)
177                    alpha = wxImageFromStream(stream, raster_format_map[format])
178                    alpha = alpha.GetData()[:] # XXX: do we need to copy this?
179    
180            #
181            # if we are using the alpha_data then scale down the alpha values
182            # by the layer's opacity using a string translation table
183            #
184            if alpha is not None:
185                lo = layer.Opacity()
186                if lo == 0:
187                    return
188                elif lo == 1:
189                    a = alpha
190                else:
191                    tr = [int(i*lo) for i in range(256)]
192                    table = array.array('B', tr).tostring()
193                    a = alpha.translate(table)
194    
195                image.SetAlphaData(a)
196    
     def draw_raster_data(self, data):  
         stream = cStringIO.StringIO(data)  
         image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)  
197          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
198          self.dc.DrawBitmap(bitmap, 0, 0)  
199            if mask is not None:
200                bitmap.SetMask(mask)
201    
202            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
203    
204    
205  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 91  class ScreenRenderer(MapRenderer): Line 207  class ScreenRenderer(MapRenderer):
207      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
208      honor_visibility = 1      honor_visibility = 1
209    
210      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
211          """Render the map.          """Render the map.
212    
213          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 215  class ScreenRenderer(MapRenderer):
215          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
216          selected_layer.          selected_layer.
217          """          """
         self.update_region = region  
218          self.selected_layer = selected_layer          self.selected_layer = selected_layer
219          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
220          self.render_map(map)          self.render_map()
221    
222        def RenderMapIncrementally(self):
223            """Render the map.
224    
225            Only the given region (a tuple in window coordinates as returned
226            by a wxrect's asTuple method) needs to be redrawn. Highlight the
227            shapes given by the ids in selected_shapes in the
228            selected_layer.
229            """
230            return self.render_map_incrementally()
231    
232        def draw_selection_incrementally(self, layer, selected_shapes):
233            """Draw the selected shapes in a emphasized way (i.e.
234            with a special pen and brush.
235            The drawing is performed incrementally, that means every
236            n shapes, the user can have interactions with the map.
237            n is currently fixed to 500.
238    
239            layer -- the layer where the shapes belong to.
240            selected_shapes -- a list of the shape-ids representing the
241                               selected shapes for the given layer.
242            """
243            pen = wxPen(wxBLACK, 3, wxSOLID)
244            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
245    
246            shapetype = layer.ShapeType()
247            useraw, func, param = self.low_level_renderer(layer)
248            args = (pen, brush)
249    
250      def draw_shape_layer(self, layer):          # for point shapes we need to find out the properties
251          MapRenderer.draw_shape_layer(self, layer)          # to determine the size. Based on table and field,
252          if layer is self.selected_layer and self.selected_shapes:          # we can find out the properties for object - see below.
253              pen = wxPen(wxBLACK, 3, wxSOLID)          if shapetype == SHAPETYPE_POINT:
254              brush = wxBrush(wxBLACK, wxCROSS_HATCH)              lc = layer.GetClassification()
255                field = layer.GetClassificationColumn()
256              shapetype = layer.ShapeType()              table = layer.ShapeStore().Table()
257              func, param = self.low_level_renderer(layer)  
258              args = (pen, brush)          count = 0
259              for index in self.selected_shapes:          for index in selected_shapes:
260                  func(param, index, *args)              count += 1
261                shape = layer.Shape(index)
262    
263                # Get the size of the specific property for this
264                # point
265                if shapetype == SHAPETYPE_POINT and field is not None:
266                    value = table.ReadValue(shape.ShapeID(), field)
267                    group = lc.FindGroup(value)
268                    size = group.GetProperties().GetSize()
269                    args = (pen, brush, size)
270    
271                if useraw:
272                    data = shape.RawData()
273                else:
274                    data = shape.Points()
275                func(param, data, *args)
276                if count % 500 == 0:
277                    yield True
278    
279      def layer_ids(self, layer):      def layer_shapes(self, layer):
280          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
281    
282          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 297  class ScreenRenderer(MapRenderer):
297          offx, offy = self.offset          offx, offy = self.offset
298          xs = []          xs = []
299          ys = []          ys = []
300          x, y, width, height = self.update_region          x, y, width, height = self.region
301          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
302                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
303              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 158  class ExportRenderer(ScreenRenderer): Line 318  class ExportRenderer(ScreenRenderer):
318    
319      honor_visibility = 1      honor_visibility = 1
320    
321      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
322                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
323    
324            In addition to all parameters of the the ScreenRender
325            constructor, this class requires and additional keyword argument
326            destination_region with a tuple (minx, miny, maxx, maxy) giving
327            the region in dc coordinates which is to contain the map.
328            """
329            self.destination_region = kw["destination_region"]
330            del kw["destination_region"]
331            ScreenRenderer.__init__(self, *args, **kw)
332    
333        def RenderMap(self, selected_layer, selected_shapes):
334          """Render the map.          """Render the map.
335    
336          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
337          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
338            Thuban.UI.viewport.output_transform().
339    
340          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
341          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
342          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
343          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
344            available for map display.
345          """          """
346    
         self.update_region = region  
347          self.selected_layer = selected_layer          self.selected_layer = selected_layer
348          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
349    
350          # Get some dimensions          # Get some dimensions
351          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
352          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
353    
354          # Manipulate the offset to position the map          # Manipulate the offset to position the map
355          offx, offy = self.offset          offx, offy = self.offset
# Line 193  class ExportRenderer(ScreenRenderer): Line 364  class ExportRenderer(ScreenRenderer):
364          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
365    
366          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
367            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
368    
369          # Draw the map          # Draw the map
370          self.dc.BeginDrawing()          self.dc.BeginDrawing()
371          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
372          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
373                                    urx, ury)                                    urx, ury)
374          self.render_map(map)          self.render_map()
375          self.dc.EndDrawing()          self.dc.EndDrawing()
376    
377          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 210  class ExportRenderer(ScreenRenderer): Line 382  class ExportRenderer(ScreenRenderer):
382          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
383          self.dc.SetFont(font)          self.dc.SetFont(font)
384    
385          self.render_frame(region)          self.render_frame()
386          self.render_legend(map)          self.render_legend()
387          self.render_scalebar(map)          self.render_scalebar()
388          self.dc.EndDrawing()          self.dc.EndDrawing()
389    
390      def render_frame(self, region):      def render_frame(self):
391          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
392    
393          dc = self.dc          dc = self.dc
# Line 224  class ExportRenderer(ScreenRenderer): Line 396  class ExportRenderer(ScreenRenderer):
396    
397          # Dimension stuff          # Dimension stuff
398          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
399          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
400    
401          # Page Frame          # Page Frame
402          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
403    
404          # Map Frame          # Map Frame
405          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
406          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
407    
408          # Legend Frame          # Legend Frame
# Line 240  class ExportRenderer(ScreenRenderer): Line 412  class ExportRenderer(ScreenRenderer):
412          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
413                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
414    
415      def render_legend(self, map):      def render_legend(self):
416          """Render the legend on the Map."""          """Render the legend on the Map."""
417    
418          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 250  class ExportRenderer(ScreenRenderer): Line 422  class ExportRenderer(ScreenRenderer):
422    
423          # Dimension stuff          # Dimension stuff
424          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
425          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
426          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
427          iconwidth  = textheight          iconwidth  = textheight
428          iconheight = textheight          iconheight = textheight
# Line 262  class ExportRenderer(ScreenRenderer): Line 434  class ExportRenderer(ScreenRenderer):
434    
435          # Render the legend          # Render the legend
436          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
437          if map.HasLayers():          if self.map.HasLayers():
438              layers = map.Layers()              layers = self.map.Layers()[:]
439              layers.reverse()              layers.reverse()
440              for l in layers:              for l in layers:
441                  if l.Visible():                  if l.Visible():
# Line 284  class ExportRenderer(ScreenRenderer): Line 456  class ExportRenderer(ScreenRenderer):
456                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
457                                  posy+=stepy                                  posy+=stepy
458    
459      def render_scalebar(self, map):      def render_scalebar(self):
460          """Render the scalebar."""          """Render the scalebar."""
461    
462          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
463    
464          # Dimension stuff          # Dimension stuff
465          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
466          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
467    
468          # Render the scalebar          # Render the scalebar
469          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
Legend:
Removed from v.1552  
changed lines
  Added in v.2602
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