/[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 1937 by bh, Tue Nov 11 18:16:42 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 39  class MapRenderer(BaseRenderer): Line 51  class MapRenderer(BaseRenderer):
51      TRANSPARENT_PEN = wxTRANSPARENT_PEN      TRANSPARENT_PEN = wxTRANSPARENT_PEN
52      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH      TRANSPARENT_BRUSH = wxTRANSPARENT_BRUSH
53    
54      make_point = wxPoint      def make_point(self, x, y):
55            return wxPoint(int(round(x)), int(round(y)))
56    
57      def tools_for_property(self, prop):      def tools_for_property(self, prop):
58          fill = prop.GetFill()          fill = prop.GetFill()
# Line 78  class MapRenderer(BaseRenderer): Line 91  class MapRenderer(BaseRenderer):
91              return BaseRenderer.low_level_renderer(self, layer)              return BaseRenderer.low_level_renderer(self, layer)
92    
93      def label_font(self):      def label_font(self):
94          return wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
95                          wxNORMAL)
96    
97      def draw_raster_data(self, data):      def draw_raster_data(self, data, format = 'BMP'):
98          stream = cStringIO.StringIO(data)          stream = cStringIO.StringIO(data)
99          image = wxImageFromStream(stream, wxBITMAP_TYPE_BMP)          image = wxImageFromStream(stream, raster_format_map[format])
100          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
101          self.dc.DrawBitmap(bitmap, 0, 0)          self.dc.DrawBitmap(bitmap, 0, 0)
102    
# Line 92  class ScreenRenderer(MapRenderer): Line 106  class ScreenRenderer(MapRenderer):
106      # On the screen we want to see only visible layers by default      # On the screen we want to see only visible layers by default
107      honor_visibility = 1      honor_visibility = 1
108    
109      def RenderMap(self, map, region, selected_layer, selected_shapes):      def RenderMap(self, selected_layer, selected_shapes):
110          """Render the map.          """Render the map.
111    
112          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 114  class ScreenRenderer(MapRenderer):
114          shapes given by the ids in selected_shapes in the          shapes given by the ids in selected_shapes in the
115          selected_layer.          selected_layer.
116          """          """
         self.update_region = region  
117          self.selected_layer = selected_layer          self.selected_layer = selected_layer
118          self.selected_shapes = selected_shapes          self.selected_shapes = selected_shapes
119          self.render_map(map)          self.render_map()
120    
121        def RenderMapIncrementally(self):
122            """Render the map.
123    
124            Only the given region (a tuple in window coordinates as returned
125            by a wxrect's asTuple method) needs to be redrawn. Highlight the
126            shapes given by the ids in selected_shapes in the
127            selected_layer.
128            """
129            return self.render_map_incrementally()
130    
131      def draw_shape_layer(self, layer):      def draw_selection_incrementally(self, layer, selected_shapes):
132          MapRenderer.draw_shape_layer(self, layer)          pen = wxPen(wxBLACK, 3, wxSOLID)
133          if layer is self.selected_layer and self.selected_shapes:          brush = wxBrush(wxBLACK, wxCROSS_HATCH)
134              pen = wxPen(wxBLACK, 3, wxSOLID)  
135              brush = wxBrush(wxBLACK, wxCROSS_HATCH)          shapetype = layer.ShapeType()
136            useraw, func, param = self.low_level_renderer(layer)
137              shapetype = layer.ShapeType()          args = (pen, brush)
138              useraw, func, param = self.low_level_renderer(layer)          count = 0
139              args = (pen, brush)          for index in selected_shapes:
140              for index in self.selected_shapes:              count += 1
141                  shape = layer.Shape(index)              shape = layer.Shape(index)
142                  if useraw:              if useraw:
143                      data = shape.RawData()                  data = shape.RawData()
144                  else:              else:
145                      data = shape.Points()                  data = shape.Points()
146                  func(param, data, *args)              func(param, data, *args)
147                if count % 500 == 0:
148                    yield True
149    
150      def layer_ids(self, layer):      def layer_shapes(self, layer):
151          """Return the shapeids covered by the region that has to be redrawn          """Return the shapeids covered by the region that has to be redrawn
152    
153          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 168  class ScreenRenderer(MapRenderer):
168          offx, offy = self.offset          offx, offy = self.offset
169          xs = []          xs = []
170          ys = []          ys = []
171          x, y, width, height = self.update_region          x, y, width, height = self.region
172          for winx, winy in ((x, y), (x + width, y),          for winx, winy in ((x, y), (x + width, y),
173                             (x + width, y + height), (x, y + height)):                             (x + width, y + height), (x, y + height)):
174              px = (winx - offx) / scale              px = (winx - offx) / scale
# Line 164  class ExportRenderer(ScreenRenderer): Line 189  class ExportRenderer(ScreenRenderer):
189    
190      honor_visibility = 1      honor_visibility = 1
191    
192      def RenderMap(self, map, region, mapregion,      def __init__(self, *args, **kw):
193                    selected_layer, selected_shapes ):          """Initialize the ExportRenderer.
194    
195            In addition to all parameters of the the ScreenRender
196            constructor, this class requires and additional keyword argument
197            destination_region with a tuple (minx, miny, maxx, maxy) giving
198            the region in dc coordinates which is to contain the map.
199            """
200            self.destination_region = kw["destination_region"]
201            del kw["destination_region"]
202            ScreenRenderer.__init__(self, *args, **kw)
203    
204        def RenderMap(self, selected_layer, selected_shapes):
205          """Render the map.          """Render the map.
206    
207          The rendering device has been specified during initialisation.          The rendering device has been specified during initialisation.
208          The device border distance was set in Thuban.UI.view.OutputTranform().          The device border distance was set in
209            Thuban.UI.viewport.output_transform().
210    
211          RenderMap renders a frame set (one page frame, one around          RenderMap renders a frame set (one page frame, one around
212          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
213          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
214          in the canvas view, centered on the area available for map display.          region displayed in the canvas view, centered on the area
215            available for map display.
216          """          """
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    
221          # Get some dimensions          # Get some dimensions
222          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
223          self.mapregion = mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
         mminx, mminy, mmaxx, mmaxy = self.mapregion  
224    
225          # Manipulate the offset to position the map          # Manipulate the offset to position the map
226          offx, offy = self.offset          offx, offy = self.offset
# Line 205  class ExportRenderer(ScreenRenderer): Line 241  class ExportRenderer(ScreenRenderer):
241          self.dc.DestroyClippingRegion()          self.dc.DestroyClippingRegion()
242          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,          self.dc.SetClippingRegion(mminx+self.shiftx, mminy+self.shifty,
243                                    urx, ury)                                    urx, ury)
244          self.render_map(map)          self.render_map()
245          self.dc.EndDrawing()          self.dc.EndDrawing()
246    
247          # Draw the rest (frames, legend, scalebar)          # Draw the rest (frames, legend, scalebar)
# Line 216  class ExportRenderer(ScreenRenderer): Line 252  class ExportRenderer(ScreenRenderer):
252          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)          font = wxFont(self.resolution * 10, wxSWISS, wxNORMAL, wxNORMAL)
253          self.dc.SetFont(font)          self.dc.SetFont(font)
254    
255          self.render_frame(region)          self.render_frame()
256          self.render_legend(map)          self.render_legend()
257          self.render_scalebar(map)          self.render_scalebar()
258          self.dc.EndDrawing()          self.dc.EndDrawing()
259    
260      def render_frame(self, region):      def render_frame(self):
261          """Render the frames for map and legend/scalebar."""          """Render the frames for map and legend/scalebar."""
262    
263          dc = self.dc          dc = self.dc
# Line 230  class ExportRenderer(ScreenRenderer): Line 266  class ExportRenderer(ScreenRenderer):
266    
267          # Dimension stuff          # Dimension stuff
268          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
269          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
270    
271          # Page Frame          # Page Frame
272          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)          dc.DrawRectangle(15,15,width-30, (mmaxy-mminy)+10)
273    
274          # Map Frame          # Map Frame
275          llx, lly, urx, ury = region          llx, lly, urx, ury = self.region
276          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)          dc.DrawRectangle(mminx + self.shiftx, mminy + self.shifty, urx, ury)
277    
278          # Legend Frame          # Legend Frame
# Line 246  class ExportRenderer(ScreenRenderer): Line 282  class ExportRenderer(ScreenRenderer):
282          dc.SetClippingRegion(mmaxx+10,mminy,          dc.SetClippingRegion(mmaxx+10,mminy,
283                               (width-20) - (mmaxx+10), mmaxy-mminy)                               (width-20) - (mmaxx+10), mmaxy-mminy)
284    
285      def render_legend(self, map):      def render_legend(self):
286          """Render the legend on the Map."""          """Render the legend on the Map."""
287    
288          previewer = ClassDataPreviewer()          previewer = ClassDataPreviewer()
# Line 256  class ExportRenderer(ScreenRenderer): Line 292  class ExportRenderer(ScreenRenderer):
292    
293          # Dimension stuff          # Dimension stuff
294          width, height = dc.GetSizeTuple()          width, height = dc.GetSizeTuple()
295          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
296          textwidth, textheight = dc.GetTextExtent("0")          textwidth, textheight = dc.GetTextExtent("0")
297          iconwidth  = textheight          iconwidth  = textheight
298          iconheight = textheight          iconheight = textheight
# Line 268  class ExportRenderer(ScreenRenderer): Line 304  class ExportRenderer(ScreenRenderer):
304    
305          # Render the legend          # Render the legend
306          dc.SetTextForeground(wxBLACK)          dc.SetTextForeground(wxBLACK)
307          if map.HasLayers():          if self.map.HasLayers():
308              layers = map.Layers()              layers = self.map.Layers()[:]
309              layers.reverse()              layers.reverse()
310              for l in layers:              for l in layers:
311                  if l.Visible():                  if l.Visible():
# Line 290  class ExportRenderer(ScreenRenderer): Line 326  class ExportRenderer(ScreenRenderer):
326                                              posx+2*dx+iconwidth, posy)                                              posx+2*dx+iconwidth, posy)
327                                  posy+=stepy                                  posy+=stepy
328    
329      def render_scalebar(self, map):      def render_scalebar(self):
330          """Render the scalebar."""          """Render the scalebar."""
331    
332          scalebar = ScaleBar(map)          scalebar = ScaleBar(self.map)
333    
334          # Dimension stuff          # Dimension stuff
335          width, height = self.dc.GetSizeTuple()          width, height = self.dc.GetSizeTuple()
336          mminx, mminy, mmaxx, mmaxy = self.mapregion          mminx, mminy, mmaxx, mmaxy = self.destination_region
337    
338          # Render the scalebar          # Render the scalebar
339          scalebar.DrawScaleBar(self.scale, self.dc,          scalebar.DrawScaleBar(self.scale, self.dc,
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