/[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 1927 by bh, Mon Nov 10 16:57:35 2003 UTC
# Line 7  Line 7 
7  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
8  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
9    
10    from __future__ import generators
11    
12  __version__ = "$Revision$"  __version__ = "$Revision$"
13    # $Source$
14    # $Id$
15    
16  import cStringIO  import cStringIO
17    
# Line 16  from Thuban import _ Line 20  from Thuban import _
20  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
21      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
22      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
23      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, wxBITMAP_TYPE_JPEG
24    
25  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
26    
# Line 32  import Thuban.Model.resource Line 36  import Thuban.Model.resource
36    
37  from baserenderer import BaseRenderer  from baserenderer import BaseRenderer
38    
39    
40    # Map the strings used for the format parameter of the draw_raster_data
41    # method to the appropriate wxWindows constants
42    raster_format_map = {
43        "BMP": wxBITMAP_TYPE_BMP,
44        "JPEG": wxBITMAP_TYPE_JPEG,
45        }
46    
47  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
48    
49      """Class to render a map onto a wxDC"""      """Class to render a map onto a wxDC"""
# Line 80  class MapRenderer(BaseRenderer): Line 92  class MapRenderer(BaseRenderer):
92      def label_font(self):      def label_font(self):
93          return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
94    
95      def draw_raster_data(self, data):      def draw_raster_data(self, data, format = 'BMP'):
96          stream = cStringIO.StringIO(data)          stream = cStringIO.StringIO(data)
97          image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)          image = wxImageFromStream(stream, raster_format_map[format])
98          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
99          self.dc.DrawBitmap(bitmap, 0, 0)          self.dc.DrawBitmap(bitmap, 0, 0)
100    
# Line 92  class ScreenRenderer(MapRenderer): Line 104  class ScreenRenderer(MapRenderer):
104      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
105      honor_visibility = 1      honor_visibility = 1
106    
107      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
108          """Render the map.          """Render the map.
109    
110          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 112  class ScreenRenderer(MapRenderer):
112          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
113          selected_layer.          selected_layer.
114          """          """
         self.update_region = region  
115          self.selected_layer = selected_layer          self.selected_layer = selected_layer
116          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
117          self.render_map(map)          self.render_map()
118    
119        def RenderMapIncrementally(self):
120            """Render the map.
121    
122            Only the given region (a tuple in window coordinates as returned
123            by a wxrect's asTuple method) needs to be redrawn. Highlight the
124            shapes given by the ids in selected_shapes in the
125            selected_layer.
126            """
127            return self.render_map_incrementally()
128    
129      def draw_shape_layer(self, layer):      def draw_selection_incrementally(self, layer, selected_shapes):
130          MapRenderer.draw_shape_layer(self, layer)          pen = wxPen(wxBLACK, 3, wxSOLID)
131          if layer is self.selected_layer and self.selected_shapes:          brush = wxBrush(wxBLACK, wxCROSS_HATCH)
132              pen = wxPen(wxBLACK, 3, wxSOLID)  
133              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          shapetype = layer.ShapeType()
134            useraw, func, param = self.low_level_renderer(layer)
135              shapetype = layer.ShapeType()          args = (pen, brush)
136              useraw, func, param = self.low_level_renderer(layer)          count = 0
137              args = (pen, brush)          for index in selected_shapes:
138              for index in self.selected_shapes:              count += 1
139                  shape = layer.Shape(index)              shape = layer.Shape(index)
140                  if useraw:              if useraw:
141                      data = shape.RawData()                  data = shape.RawData()
142                  else:              else:
143                      data = shape.Points()                  data = shape.Points()
144                  func(param, data, *args)              func(param, data, *args)
145                if count % 500 == 0:
146                    yield True
147    
148      def layer_ids(self, layer):      def layer_shapes(self, layer):
149          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
150    
151          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 166  class ScreenRenderer(MapRenderer):
166          offx, offy = self.offset          offx, offy = self.offset
167          xs = []          xs = []
168          ys = []          ys = []
169          x, y, width, height = self.update_region          x, y, width, height = self.region
170          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
171                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
172              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 164  class ExportRenderer(ScreenRenderer): Line 187  class ExportRenderer(ScreenRenderer):
187    
188      honor_visibility = 1      honor_visibility = 1
189    
190      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
191                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
192    
193            In addition to all parameters of the the ScreenRender
194            constructor, this class requires and additional keyword argument
195            destination_region with a tuple (minx, miny, maxx, maxy) giving
196            the region in dc coordinates which is to contain the map.
197            """
198            self.destination_region = kw["destination_region"]
199            del kw["destination_region"]
200            ScreenRenderer.__init__(self, *args, **kw)
201    
202        def RenderMap(self, selected_layer, selected_shapes):
203          """Render the map.          """Render the map.
204    
205          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
206          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
207            Thuban.UI.viewport.output_transform().
208    
209          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
210          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
211          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
212          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
213            available for map display.
214          """          """
215    
         self.update_region = region  
216          self.selected_layer = selected_layer          self.selected_layer = selected_layer
217          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
218    
219          # Get some dimensions          # Get some dimensions
220          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
221          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
222    
223          # Manipulate the offset to position the map          # Manipulate the offset to position the map
224          offx, offy = self.offset          offx, offy = self.offset
# Line 205  class ExportRenderer(ScreenRenderer): Line 239  class ExportRenderer(ScreenRenderer):
239          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
240          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
241                                    urx, ury)                                    urx, ury)
242          self.render_map(map)          self.render_map()
243          self.dc.EndDrawing()          self.dc.EndDrawing()
244    
245          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 216  class ExportRenderer(ScreenRenderer): Line 250  class ExportRenderer(ScreenRenderer):
250          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
251          self.dc.SetFont(font)          self.dc.SetFont(font)
252    
253          self.render_frame(region)          self.render_frame()
254          self.render_legend(map)          self.render_legend()
255          self.render_scalebar(map)          self.render_scalebar()
256          self.dc.EndDrawing()          self.dc.EndDrawing()
257    
258      def render_frame(self, region):      def render_frame(self):
259          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
260    
261          dc = self.dc          dc = self.dc
# Line 230  class ExportRenderer(ScreenRenderer): Line 264  class ExportRenderer(ScreenRenderer):
264    
265          # Dimension stuff          # Dimension stuff
266          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
267          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
268    
269          # Page Frame          # Page Frame
270          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
271    
272          # Map Frame          # Map Frame
273          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
274          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
275    
276          # Legend Frame          # Legend Frame
# Line 246  class ExportRenderer(ScreenRenderer): Line 280  class ExportRenderer(ScreenRenderer):
280          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
281                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
282    
283      def render_legend(self, map):      def render_legend(self):
284          """Render the legend on the Map."""          """Render the legend on the Map."""
285    
286          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 256  class ExportRenderer(ScreenRenderer): Line 290  class ExportRenderer(ScreenRenderer):
290    
291          # Dimension stuff          # Dimension stuff
292          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
293          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
294          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
295          iconwidth  = textheight          iconwidth  = textheight
296          iconheight = textheight          iconheight = textheight
# Line 268  class ExportRenderer(ScreenRenderer): Line 302  class ExportRenderer(ScreenRenderer):
302    
303          # Render the legend          # Render the legend
304          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
305          if map.HasLayers():          if self.map.HasLayers():
306              layers = map.Layers()              layers = self.map.Layers()[:]
307              layers.reverse()              layers.reverse()
308              for l in layers:              for l in layers:
309                  if l.Visible():                  if l.Visible():
# Line 290  class ExportRenderer(ScreenRenderer): Line 324  class ExportRenderer(ScreenRenderer):
324                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
325                                  posy+=stepy                                  posy+=stepy
326    
327      def render_scalebar(self, map):      def render_scalebar(self):
328          """Render the scalebar."""          """Render the scalebar."""
329    
330          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
331    
332          # Dimension stuff          # Dimension stuff
333          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
334          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
335    
336          # Render the scalebar          # Render the scalebar
337          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
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