/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 822 by jonathan, Mon May 5 18:20:28 2003 UTC revision 1035 by jan, Mon May 26 17:03:08 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4    # Frank Koormann <[email protected]>
5  #  #
6  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
7  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 11  Classes for display of a map and interac Line 12  Classes for display of a map and interac
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    
15    from Thuban import _
16    
17  import sys  import sys
18    import os.path
19    
20  from math import hypot  from math import hypot
21    
# Line 19  from wxPython.wx import wxWindow,\ Line 23  from wxPython.wx import wxWindow,\
23       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\
24       EVT_PAINT, EVT_LEFT_DOWN, EVT_LEFT_UP, EVT_MOTION, EVT_LEAVE_WINDOW, \       EVT_PAINT, EVT_LEFT_DOWN, EVT_LEFT_UP, EVT_MOTION, EVT_LEAVE_WINDOW, \
25       wxBITMAP_TYPE_XPM, wxBeginBusyCursor, wxEndBusyCursor, wxCursor, \       wxBITMAP_TYPE_XPM, wxBeginBusyCursor, wxEndBusyCursor, wxCursor, \
26       wxImageFromBitmap       wxImageFromBitmap, wxPlatform
27    
28    # Export related stuff
29    if wxPlatform == '__WXMSW__':
30        from wxPython.wx import wxMetaFileDC
31    from wxPython.wx import wxFileDialog, wxSAVE, wxOVERWRITE_PROMPT, wxID_OK
32    
33  from wxPython import wx  from wxPython import wx
34    
35  from wxproj import point_in_polygon_shape, shape_centroid  from wxproj import point_in_polygon_shape, shape_centroid
36    
   
37  from Thuban.Model.messages import MAP_PROJECTION_CHANGED, \  from Thuban.Model.messages import MAP_PROJECTION_CHANGED, \
38       MAP_LAYERS_CHANGED, LAYER_CHANGED, LAYER_VISIBILITY_CHANGED       MAP_LAYERS_CHANGED, LAYER_CHANGED, LAYER_VISIBILITY_CHANGED
39  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \
# Line 39  from Thuban.Model.color import Color Line 46  from Thuban.Model.color import Color
46  import resource  import resource
47    
48  from selection import Selection  from selection import Selection
49  from renderer import ScreenRenderer, PrinterRender  from renderer import ScreenRenderer, ExportRenderer, PrinterRenderer
50    
51  import labeldialog  import labeldialog
52    
53  from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION  from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION, \
54                         SCALE_CHANGED
55    
56    
57  #  #
# Line 223  class LabelTool(Tool): Line 231  class LabelTool(Tool):
231          self.view.LabelShapeAt(event.m_x, event.m_y)          self.view.LabelShapeAt(event.m_x, event.m_y)
232    
233    
   
   
234  class MapPrintout(wx.wxPrintout):  class MapPrintout(wx.wxPrintout):
235    
236      """      """
237      wxPrintout class for printing Thuban maps      wxPrintout class for printing Thuban maps
238      """      """
239    
240      def __init__(self, map):      def __init__(self, canvas, map, region, selected_layer, selected_shapes):
241          wx.wxPrintout.__init__(self)          wx.wxPrintout.__init__(self)
242            self.canvas = canvas
243          self.map = map          self.map = map
244            self.region = region
245            self.selected_layer = selected_layer
246            self.selected_shapes = selected_shapes
247    
248      def GetPageInfo(self):      def GetPageInfo(self):
249          return (1, 1, 1, 1)          return (1, 1, 1, 1)
# Line 247  class MapPrintout(wx.wxPrintout): Line 257  class MapPrintout(wx.wxPrintout):
257    
258      def draw_on_dc(self, dc):      def draw_on_dc(self, dc):
259          width, height = self.GetPageSizePixels()          width, height = self.GetPageSizePixels()
260          llx, lly, urx, ury = self.map.ProjectedBoundingBox()          scale, offset, mapregion = OutputTransform(self.canvas.scale,
261          scalex = width / (urx - llx)                                                     self.canvas.offset,
262          scaley = height / (ury - lly)                                                     self.canvas.GetSizeTuple(),
263          scale = min(scalex, scaley)                                                     self.GetPageSizePixels())
         offx = 0.5 * (width - (urx + llx) * scale)  
         offy = 0.5 * (height + (ury + lly) * scale)  
   
264          resx, resy = self.GetPPIPrinter()          resx, resy = self.GetPPIPrinter()
265          renderer = PrinterRender(dc, scale, (offx, offy), resolution = resx)          renderer = PrinterRenderer(dc, scale, offset, resolution = resy)
266          renderer.RenderMap(self.map)          x, y, width, height = self.region
267          return wx.true          canvas_scale = self.canvas.scale
268            renderer.RenderMap(self.map,
269                               (0,0,
270                                    (width/canvas_scale)*scale,
271                                    (height/canvas_scale)*scale),
272                                    mapregion,
273                               self.selected_layer, self.selected_shapes)
274            return True
275    
276    
277  class MapCanvas(wxWindow, Publisher):  class MapCanvas(wxWindow, Publisher):
# Line 277  class MapCanvas(wxWindow, Publisher): Line 291  class MapCanvas(wxWindow, Publisher):
291      delegated_methods = {"SelectLayer": "selection",      delegated_methods = {"SelectLayer": "selection",
292                           "SelectShapes": "selection",                           "SelectShapes": "selection",
293                           "SelectedLayer": "selection",                           "SelectedLayer": "selection",
294                           "HasSelectedLayer": "selection"}                           "HasSelectedLayer": "selection",
295                             "HasSelectedShapes": "selection",
296                             "SelectedShapes": "selection"}
297    
298      def __init__(self, parent, winid):      def __init__(self, parent, winid):
299          wxWindow.__init__(self, parent, winid)          wxWindow.__init__(self, parent, winid)
# Line 361  class MapCanvas(wxWindow, Publisher): Line 377  class MapCanvas(wxWindow, Publisher):
377          dc = wxPaintDC(self)          dc = wxPaintDC(self)
378          clear = self.map is None or not self.map.HasLayers()          clear = self.map is None or not self.map.HasLayers()
379    
380          #wxBeginBusyCursor()          wxBeginBusyCursor()
381    
382          if not clear:          if not clear:
383                self.do_redraw()
384              try:              try:
385                  self.do_redraw()                  pass
386              except:              except:
387                  print "Error during drawing:", sys.exc_info()[0]                  print "Error during drawing:", sys.exc_info()[0]
388                  clear = True                  clear = True
# Line 382  class MapCanvas(wxWindow, Publisher): Line 399  class MapCanvas(wxWindow, Publisher):
399              dc.Clear()              dc.Clear()
400              dc.EndDrawing()              dc.EndDrawing()
401    
402          #wxEndBusyCursor()          wxEndBusyCursor()
403    
404      def do_redraw(self):      def do_redraw(self):
405          # This should only be called if we have a non-empty map.          # This should only be called if we have a non-empty map.
# Line 429  class MapCanvas(wxWindow, Publisher): Line 446  class MapCanvas(wxWindow, Publisher):
446          clientdc.Blit(0, 0, width, height, dc, 0, 0)          clientdc.Blit(0, 0, width, height, dc, 0, 0)
447          clientdc.EndDrawing()          clientdc.EndDrawing()
448    
449        def Export(self):
450            if self.scale == 0:
451                return
452    
453            if hasattr(self, "export_path"):
454                export_path = self.export_path
455            else:
456                export_path="."
457            dlg = wxFileDialog(self, _("Export Map"), export_path, "",
458                               "Enhanced Metafile (*.wmf)|*.wmf",
459                               wxSAVE|wxOVERWRITE_PROMPT)
460            if dlg.ShowModal() == wxID_OK:
461                self.export_path = os.path.dirname(dlg.GetPath())
462                dc = wxMetaFileDC(dlg.GetPath())
463        
464                scale, offset, mapregion = OutputTransform(self.scale,
465                                                           self.offset,
466                                                           self.GetSizeTuple(),
467                                                           dc.GetSizeTuple())
468    
469                selected_layer = self.selection.SelectedLayer()
470                selected_shapes = self.selection.SelectedShapes()
471    
472                renderer = ExportRenderer(dc, scale, offset)
473    
474                # Pass the entire bitmap as update region to the renderer.
475                # We're redrawing the whole bitmap, after all.
476                width, height = self.GetSizeTuple()
477                renderer.RenderMap(self.map,
478                                    (0,0,
479                                        (width/self.scale)*scale,
480                                        (height/self.scale)*scale),
481                                    mapregion,
482                                    selected_layer, selected_shapes)
483                dc.EndDrawing()
484                dc.Close()
485            dlg.Destroy()
486            
487      def Print(self):      def Print(self):
488          printer = wx.wxPrinter()          printer = wx.wxPrinter()
489          printout = MapPrintout(self.map)          width, height = self.GetSizeTuple()
490          printer.Print(self, printout, wx.true)          selected_layer = self.selection.SelectedLayer()
491            selected_shapes = self.selection.SelectedShapes()
492            
493            printout = MapPrintout(self, self.map, (0, 0, width, height),
494                                   selected_layer, selected_shapes)
495            printer.Print(self, printout, True)
496          printout.Destroy()          printout.Destroy()
497    
498      def SetMap(self, map):      def SetMap(self, map):
# Line 472  class MapCanvas(wxWindow, Publisher): Line 532  class MapCanvas(wxWindow, Publisher):
532    
533      def set_view_transform(self, scale, offset):      def set_view_transform(self, scale, offset):
534          self.scale = scale          self.scale = scale
535    
536          self.offset = offset          self.offset = offset
537          self.full_redraw()          self.full_redraw()
538            self.issue(SCALE_CHANGED, scale)
539    
540      def proj_to_win(self, x, y):      def proj_to_win(self, x, y):
541          """\          """\
542          Return the point in  window coords given by projected coordinates x y          Return the point in  window coords given by projected coordinates x y
543          """          """
544            if self.scale == 0:
545                return (0, 0)
546    
547          offx, offy = self.offset          offx, offy = self.offset
548          return (self.scale * x + offx, -self.scale * y + offy)          return (self.scale * x + offx, -self.scale * y + offy)
549    
# Line 486  class MapCanvas(wxWindow, Publisher): Line 551  class MapCanvas(wxWindow, Publisher):
551          """\          """\
552          Return the point in projected coordinates given by window coords x y          Return the point in projected coordinates given by window coords x y
553          """          """
554            if self.scale == 0:
555                return (0, 0)
556    
557          offx, offy = self.offset          offx, offy = self.offset
558          return ((x - offx) / self.scale, (offy - y) / self.scale)          return ((x - offx) / self.scale, (offy - y) / self.scale)
559    
# Line 529  class MapCanvas(wxWindow, Publisher): Line 597  class MapCanvas(wxWindow, Publisher):
597              proj = self.map.GetProjection()              proj = self.map.GetProjection()
598              if proj is not None:              if proj is not None:
599                  bbox = proj.ForwardBBox(bbox)                  bbox = proj.ForwardBBox(bbox)
600                  if bbox is not None:  
601                      self.FitRectToWindow(bbox)              if bbox is not None:
602                    self.FitRectToWindow(bbox)
603    
604        def FitSelectedToWindow(self):
605            layer = self.selection.SelectedLayer()
606            shapes = self.selection.SelectedShapes()
607    
608            bbox = layer.ShapesBoundingBox(shapes)
609            if bbox is not None:
610                proj = self.map.GetProjection()
611                if proj is not None:
612                    bbox = proj.ForwardBBox(bbox)
613    
614                if bbox is not None:
615                    self.FitRectToWindow(bbox)
616    
617      def ZoomFactor(self, factor, center = None):      def ZoomFactor(self, factor, center = None):
618          """Multiply the zoom by factor and center on center.          """Multiply the zoom by factor and center on center.
# Line 539  class MapCanvas(wxWindow, Publisher): Line 621  class MapCanvas(wxWindow, Publisher):
621          that should be centered. If it is omitted, it defaults to the          that should be centered. If it is omitted, it defaults to the
622          center of the window          center of the window
623          """          """
624          width, height = self.GetSizeTuple()          if self.scale > 0:
625          scale = self.scale * factor              width, height = self.GetSizeTuple()
626          offx, offy = self.offset              scale = self.scale * factor
627          if center is not None:              offx, offy = self.offset
628              cx, cy = center              if center is not None:
629          else:                  cx, cy = center
630              cx = width / 2              else:
631              cy = height / 2                  cx = width / 2
632          offset = (factor * (offx - cx) + width / 2,                  cy = height / 2
633                    factor * (offy - cy) + height / 2)              offset = (factor * (offx - cx) + width / 2,
634          self.set_view_transform(scale, offset)                      factor * (offy - cy) + height / 2)
635                self.set_view_transform(scale, offset)
636    
637      def ZoomOutToRect(self, rect):      def ZoomOutToRect(self, rect):
638          """Zoom out to fit the currently visible region into rect.          """Zoom out to fit the currently visible region into rect.
# Line 735  class MapCanvas(wxWindow, Publisher): Line 818  class MapCanvas(wxWindow, Publisher):
818              forward = None              forward = None
819    
820          scale = self.scale          scale = self.scale
821    
822            if scale == 0:
823                return None, None
824    
825          offx, offy = self.offset          offx, offy = self.offset
826    
827          if select_labels:          if select_labels:
# Line 927  class MapCanvas(wxWindow, Publisher): Line 1014  class MapCanvas(wxWindow, Publisher):
1014                      valign = ALIGN_CENTER                      valign = ALIGN_CENTER
1015                  label_layer.AddLabel(x, y, text,                  label_layer.AddLabel(x, y, text,
1016                                       halign = halign, valign = valign)                                       halign = halign, valign = valign)
1017    
1018    def OutputTransform(canvas_scale, canvas_offset, canvas_size, device_extend):
1019        """Calculate dimensions to transform canvas content to output device."""
1020        width, height = device_extend
1021    
1022        # Only 80 % of the with are available for the map
1023        width = width * 0.8
1024    
1025        # Define the distance of the map from DC border
1026        distance = 20
1027    
1028        if height < width:
1029            # landscape
1030            map_height = height - 2*distance
1031            map_width = map_height
1032        else:
1033            # portrait, recalibrate width (usually the legend width is too
1034            # small
1035            width = width * 0.9
1036            map_height = width - 2*distance
1037            map_width = map_height
1038        
1039        mapregion = (distance, distance,
1040                     distance+map_width, distance+map_height)
1041    
1042        canvas_width, canvas_height = canvas_size
1043        
1044        scalex = map_width / (canvas_width/canvas_scale)
1045        scaley = map_height / (canvas_height/canvas_scale)
1046        scale = min(scalex, scaley)
1047        canvas_offx, canvas_offy = canvas_offset
1048        offx = scale*canvas_offx/canvas_scale
1049        offy = scale*canvas_offy/canvas_scale
1050    
1051        return scale, (offx, offy), mapregion
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