/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 1591 by bh, Fri Aug 15 14:00:53 2003 UTC revision 2537 by jonathan, Fri Jan 21 14:01:25 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    
# Line 16  from Thuban import _ Line 21  from Thuban import _
21  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
22      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
23      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
24      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
25        wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
26        wxBITMAP_TYPE_GIF, wxEmptyImage
27    
28  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
29    
# Line 32  import Thuban.Model.resource Line 39  import Thuban.Model.resource
39    
40  from baserenderer import BaseRenderer  from baserenderer import BaseRenderer
41    
42    from math import floor
43    
44    from types import StringType
45    
46    
47    # Map the strings used for the format parameter of the draw_raster_data
48    # method to the appropriate wxWindows constants
49    raster_format_map = {
50        "BMP": wxBITMAP_TYPE_BMP,
51        "JPEG": wxBITMAP_TYPE_JPEG,
52        "PNG": wxBITMAP_TYPE_PNG,
53        "TIFF": wxBITMAP_TYPE_TIF,
54        "GIF": wxBITMAP_TYPE_GIF,
55        }
56    
57  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
58    
59      """Class to render a map onto a wxDC"""      """Class to render a map onto a wxDC"""
# Line 39  class MapRenderer(BaseRenderer): Line 61  class MapRenderer(BaseRenderer):
61      TRANSPARENT_PEN = wxTRANSPARENT_PEN      TRANSPARENT_PEN = wxTRANSPARENT_PEN
62      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
63    
64      make_point = wxPoint      def make_point(self, x, y):
65            return wxPoint(int(round(x)), int(round(y)))
66    
67      def tools_for_property(self, prop):      def tools_for_property(self, prop):
68          fill = prop.GetFill()          fill = prop.GetFill()
# Line 78  class MapRenderer(BaseRenderer): Line 101  class MapRenderer(BaseRenderer):
101              return BaseRenderer.low_level_renderer(self, layer)              return BaseRenderer.low_level_renderer(self, layer)
102    
103      def label_font(self):      def label_font(self):
104          return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
105                          wxNORMAL)
106    
107        def draw_raster_data(self, x,y, data, format = 'BMP', mask = None):
108            if format == 'RAW':
109                image = wxEmptyImage(data[0], data[1])
110                image.SetData(data[2])
111            else:
112                stream = cStringIO.StringIO(data[2])
113                image = wxImageFromStream(stream, raster_format_map[format])
114    
     def draw_raster_data(self, data):  
         stream = cStringIO.StringIO(data)  
         image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)  
115          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
116          self.dc.DrawBitmap(bitmap, 0, 0)  
117            if mask is None:
118                self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), False)
119            else:
120                # if we are given a mask object, try to pass it to SetMaskColour,
121                # otherwise assume it's a mask image
122                try:
123                    bitmap.SetMaskColour(mask);
124                    self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
125                except (TypeError):
126                    # implement using a mask image
127                    raise NotImplementedError
128    
129    
130  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 92  class ScreenRenderer(MapRenderer): Line 132  class ScreenRenderer(MapRenderer):
132      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
133      honor_visibility = 1      honor_visibility = 1
134    
135      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
136          """Render the map.          """Render the map.
137    
138          Only the given region (a tuple in window coordinates as returned          Only the given region (a tuple in window coordinates as returned
# Line 100  class ScreenRenderer(MapRenderer): Line 140  class ScreenRenderer(MapRenderer):
140          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
141          selected_layer.          selected_layer.
142          """          """
         self.update_region = region  
143          self.selected_layer = selected_layer          self.selected_layer = selected_layer
144          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
145          self.render_map(map)          self.render_map()
146    
147        def RenderMapIncrementally(self):
148            """Render the map.
149    
150      def draw_shape_layer(self, layer):          Only the given region (a tuple in window coordinates as returned
151          MapRenderer.draw_shape_layer(self, layer)          by a wxrect's asTuple method) needs to be redrawn. Highlight the
152          if layer is self.selected_layer and self.selected_shapes:          shapes given by the ids in selected_shapes in the
153              pen = wxPen(wxBLACK, 3, wxSOLID)          selected_layer.
154              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          """
155            return self.render_map_incrementally()
             shapetype = layer.ShapeType()  
             useraw, func, param = self.low_level_renderer(layer)  
             args = (pen, brush)  
             for index in self.selected_shapes:  
                 shape = layer.Shape(index)  
                 if useraw:  
                     data = shape.RawData()  
                 else:  
                     data = shape.Points()  
                 func(param, data, *args)  
156    
157      def layer_ids(self, layer):      def draw_selection_incrementally(self, layer, selected_shapes):
158            """Draw the selected shapes in a emphasized way (i.e.
159            with a special pen and brush.
160            The drawing is performed incrementally, that means every
161            n shapes, the user can have interactions with the map.
162            n is currently fixed to 500.
163    
164            layer -- the layer where the shapes belong to.
165            selected_shapes -- a list of the shape-ids representing the
166                               selected shapes for the given layer.
167            """
168            pen = wxPen(wxBLACK, 3, wxSOLID)
169            brush = wxBrush(wxBLACK, wxCROSS_HATCH)
170    
171            shapetype = layer.ShapeType()
172            useraw, func, param = self.low_level_renderer(layer)
173            args = (pen, brush)
174    
175            # for point shapes we need to find out the properties
176            # to determine the size. Based on table and field,
177            # we can find out the properties for object - see below.
178            if shapetype == SHAPETYPE_POINT:
179                lc = layer.GetClassification()
180                field = layer.GetClassificationColumn()
181                table = layer.ShapeStore().Table()
182    
183            count = 0
184            for index in selected_shapes:
185                count += 1
186                shape = layer.Shape(index)
187    
188                # Get the size of the specific property for this
189                # point
190                if shapetype == SHAPETYPE_POINT and field is not None:
191                    value = table.ReadValue(shape.ShapeID(), field)
192                    group = lc.FindGroup(value)
193                    size = group.GetProperties().GetSize()
194                    args = (pen, brush, size)
195    
196                if useraw:
197                    data = shape.RawData()
198                else:
199                    data = shape.Points()
200                func(param, data, *args)
201                if count % 500 == 0:
202                    yield True
203    
204        def layer_shapes(self, layer):
205          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
206    
207          Call the layer's ShapesInRegion method to determine the ids so          Call the layer's ShapesInRegion method to determine the ids so
# Line 143  class ScreenRenderer(MapRenderer): Line 222  class ScreenRenderer(MapRenderer):
222          offx, offy = self.offset          offx, offy = self.offset
223          xs = []          xs = []
224          ys = []          ys = []
225          x, y, width, height = self.update_region          x, y, width, height = self.region
226          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
227                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
228              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 164  class ExportRenderer(ScreenRenderer): Line 243  class ExportRenderer(ScreenRenderer):
243    
244      honor_visibility = 1      honor_visibility = 1
245    
246      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
247                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
248    
249            In addition to all parameters of the the ScreenRender
250            constructor, this class requires and additional keyword argument
251            destination_region with a tuple (minx, miny, maxx, maxy) giving
252            the region in dc coordinates which is to contain the map.
253            """
254            self.destination_region = kw["destination_region"]
255            del kw["destination_region"]
256            ScreenRenderer.__init__(self, *args, **kw)
257    
258        def RenderMap(self, selected_layer, selected_shapes):
259          """Render the map.          """Render the map.
260    
261          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
262          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
263            Thuban.UI.viewport.output_transform().
264    
265          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
266          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
267          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
268          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
269            available for map display.
270          """          """
271    
         self.update_region = region  
272          self.selected_layer = selected_layer          self.selected_layer = selected_layer
273          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
274    
275          # Get some dimensions          # Get some dimensions
276          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
277          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
278    
279          # Manipulate the offset to position the map          # Manipulate the offset to position the map
280          offx, offy = self.offset          offx, offy = self.offset
# Line 199  class ExportRenderer(ScreenRenderer): Line 289  class ExportRenderer(ScreenRenderer):
289          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
290    
291          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
292            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
293    
294          # Draw the map          # Draw the map
295          self.dc.BeginDrawing()          self.dc.BeginDrawing()
296          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
297          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
298                                    urx, ury)                                    urx, ury)
299          self.render_map(map)          self.render_map()
300          self.dc.EndDrawing()          self.dc.EndDrawing()
301    
302          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 216  class ExportRenderer(ScreenRenderer): Line 307  class ExportRenderer(ScreenRenderer):
307          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
308          self.dc.SetFont(font)          self.dc.SetFont(font)
309    
310          self.render_frame(region)          self.render_frame()
311          self.render_legend(map)          self.render_legend()
312          self.render_scalebar(map)          self.render_scalebar()
313          self.dc.EndDrawing()          self.dc.EndDrawing()
314    
315      def render_frame(self, region):      def render_frame(self):
316          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
317    
318          dc = self.dc          dc = self.dc
# Line 230  class ExportRenderer(ScreenRenderer): Line 321  class ExportRenderer(ScreenRenderer):
321    
322          # Dimension stuff          # Dimension stuff
323          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
324          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
325    
326          # Page Frame          # Page Frame
327          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
328    
329          # Map Frame          # Map Frame
330          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
331          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
332    
333          # Legend Frame          # Legend Frame
# Line 246  class ExportRenderer(ScreenRenderer): Line 337  class ExportRenderer(ScreenRenderer):
337          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
338                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
339    
340      def render_legend(self, map):      def render_legend(self):
341          """Render the legend on the Map."""          """Render the legend on the Map."""
342    
343          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 256  class ExportRenderer(ScreenRenderer): Line 347  class ExportRenderer(ScreenRenderer):
347    
348          # Dimension stuff          # Dimension stuff
349          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
350          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
351          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
352          iconwidth  = textheight          iconwidth  = textheight
353          iconheight = textheight          iconheight = textheight
# Line 268  class ExportRenderer(ScreenRenderer): Line 359  class ExportRenderer(ScreenRenderer):
359    
360          # Render the legend          # Render the legend
361          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
362          if map.HasLayers():          if self.map.HasLayers():
363              layers = map.Layers()              layers = self.map.Layers()[:]
364              layers.reverse()              layers.reverse()
365              for l in layers:              for l in layers:
366                  if l.Visible():                  if l.Visible():
# Line 290  class ExportRenderer(ScreenRenderer): Line 381  class ExportRenderer(ScreenRenderer):
381                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
382                                  posy+=stepy                                  posy+=stepy
383    
384      def render_scalebar(self, map):      def render_scalebar(self):
385          """Render the scalebar."""          """Render the scalebar."""
386    
387          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
388    
389          # Dimension stuff          # Dimension stuff
390          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
391          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
392    
393          # Render the scalebar          # Render the scalebar
394          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
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