/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 535 by bh, Fri Mar 14 20:42:18 2003 UTC revision 1105 by jonathan, Fri May 30 06:30:15 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
18    import os.path
19    
20  from math import hypot  from math import hypot
21    
22  from wxPython.wx import wxWindow,\  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, \
26         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       LAYERS_CHANGED, LAYER_LEGEND_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, \
40       SHAPETYPE_POINT       SHAPETYPE_POINT
41  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \
# Line 32  from Thuban.Model.label import ALIGN_CEN Line 43  from Thuban.Model.label import ALIGN_CEN
43  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
44  from Thuban.Model.color import Color  from Thuban.Model.color import Color
45    
46    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 217  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 241  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 259  class MapCanvas(wxWindow, Publisher): Line 279  class MapCanvas(wxWindow, Publisher):
279      """A widget that displays a map and offers some interaction"""      """A widget that displays a map and offers some interaction"""
280    
281      # Some messages that can be subscribed/unsubscribed directly through      # Some messages that can be subscribed/unsubscribed directly through
282      # the MapCanvas come in fact from other objects. This is a map to      # the MapCanvas come in fact from other objects. This is a dict
283      # map those messages to the names of the instance variables they      # mapping those messages to the names of the instance variables they
284      # actually come from. This delegation is implemented in the      # actually come from. The delegation is implemented in the Subscribe
285      # Subscribe and unsubscribed methods      # and Unsubscribe methods
286      delegated_messages = {LAYER_SELECTED: "selection",      delegated_messages = {LAYER_SELECTED: "selection",
287                            SHAPES_SELECTED: "selection"}                            SHAPES_SELECTED: "selection"}
288    
# Line 271  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 353  class MapCanvas(wxWindow, Publisher): Line 375  class MapCanvas(wxWindow, Publisher):
375    
376      def OnPaint(self, event):      def OnPaint(self, event):
377          dc = wxPaintDC(self)          dc = wxPaintDC(self)
378          if self.map is not None and self.map.HasLayers():          clear = self.map is None or not self.map.HasLayers()
             self.do_redraw()  
         else:  
             # If we've got no map or if the map is empty, simply clear  
             # the screen.  
379    
380              # XXX it's probably possible to get rid of this. The          wxBeginBusyCursor()
381              # background color of the window is already white and the          try:
382              # only thing we may have to do is to call self.Refresh()              if not clear:
383              # with a true argument in the right places.                  self.do_redraw()
384              dc.BeginDrawing()                  try:
385              dc.Clear()                      pass
386              dc.EndDrawing()                  except:
387                        print "Error during drawing:", sys.exc_info()[0]
388                        clear = True
389    
390                if clear:
391                    # If we've got no map or if the map is empty, simply clear
392                    # the screen.
393    
394                    # XXX it's probably possible to get rid of this. The
395                    # background color of the window is already white and the
396                    # only thing we may have to do is to call self.Refresh()
397                    # with a true argument in the right places.
398                    dc.BeginDrawing()
399                    dc.Clear()
400                    dc.EndDrawing()
401            finally:
402                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 383  class MapCanvas(wxWindow, Publisher): Line 417  class MapCanvas(wxWindow, Publisher):
417              dc.BeginDrawing()              dc.BeginDrawing()
418    
419              # clear the background              # clear the background
420              dc.SetBrush(wx.wxWHITE_BRUSH)              #dc.SetBrush(wx.wxWHITE_BRUSH)
421              dc.SetPen(wx.wxTRANSPARENT_PEN)              #dc.SetPen(wx.wxTRANSPARENT_PEN)
422              dc.DrawRectangle(0, 0, width, height)              #dc.DrawRectangle(0, 0, width, height)
423                dc.SetBackground(wx.wxWHITE_BRUSH)
424                dc.Clear()
425    
426              selected_layer = self.selection.SelectedLayer()              selected_layer = self.selection.SelectedLayer()
427              selected_shapes = self.selection.SelectedShapes()              selected_shapes = self.selection.SelectedShapes()
# Line 410  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):
499          redraw_channels = (LAYERS_CHANGED, LAYER_LEGEND_CHANGED,          redraw_channels = (MAP_LAYERS_CHANGED, LAYER_CHANGED,
500                             LAYER_VISIBILITY_CHANGED)                             LAYER_VISIBILITY_CHANGED)
501          if self.map is not None:          if self.map is not None:
502              for channel in redraw_channels:              for channel in redraw_channels:
# Line 453  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 467  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 479  class MapCanvas(wxWindow, Publisher): Line 566  class MapCanvas(wxWindow, Publisher):
566          width, height = self.GetSizeTuple()          width, height = self.GetSizeTuple()
567          llx, lly, urx, ury = rect          llx, lly, urx, ury = rect
568          if llx == urx or lly == ury:          if llx == urx or lly == ury:
569              # zero with or zero height. Do Nothing              # zero width or zero height. Do Nothing
570              return              return
571          scalex = width / (urx - llx)          scalex = width / (urx - llx)
572          scaley = height / (ury - lly)          scaley = height / (ury - lly)
# Line 498  class MapCanvas(wxWindow, Publisher): Line 585  class MapCanvas(wxWindow, Publisher):
585          if bbox is not None:          if bbox is not None:
586              self.FitRectToWindow(bbox)              self.FitRectToWindow(bbox)
587    
588        def FitLayerToWindow(self, layer):
589            """Fit the given layer to the window.
590    
591            Set the scale so that the layer fits exactly into the window and
592            center it in the window.
593            """
594            
595            bbox = layer.LatLongBoundingBox()
596            if bbox is not None:
597                proj = self.map.GetProjection()
598                if proj is not None:
599                    bbox = proj.ForwardBBox(bbox)
600    
601                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                    if len(shapes) == 1 and layer.ShapeType() == SHAPETYPE_POINT:
616                        self.ZoomFactor(1, self.proj_to_win(bbox[0], bbox[1]))
617                    else:
618                        self.FitRectToWindow(bbox)
619    
620      def ZoomFactor(self, factor, center = None):      def ZoomFactor(self, factor, center = None):
621          """Multiply the zoom by factor and center on center.          """Multiply the zoom by factor and center on center.
622    
# Line 505  class MapCanvas(wxWindow, Publisher): Line 624  class MapCanvas(wxWindow, Publisher):
624          that should be centered. If it is omitted, it defaults to the          that should be centered. If it is omitted, it defaults to the
625          center of the window          center of the window
626          """          """
627          width, height = self.GetSizeTuple()          if self.scale > 0:
628          scale = self.scale * factor              width, height = self.GetSizeTuple()
629          offx, offy = self.offset              scale = self.scale * factor
630          if center is not None:              offx, offy = self.offset
631              cx, cy = center              if center is not None:
632          else:                  cx, cy = center
633              cx = width / 2              else:
634              cy = height / 2                  cx = width / 2
635          offset = (factor * (offx - cx) + width / 2,                  cy = height / 2
636                    factor * (offy - cy) + height / 2)              offset = (factor * (offx - cx) + width / 2,
637          self.set_view_transform(scale, offset)                      factor * (offy - cy) + height / 2)
638                self.set_view_transform(scale, offset)
639    
640      def ZoomOutToRect(self, rect):      def ZoomOutToRect(self, rect):
641          """Zoom out to fit the currently visible region into rect.          """Zoom out to fit the currently visible region into rect.
# Line 561  class MapCanvas(wxWindow, Publisher): Line 681  class MapCanvas(wxWindow, Publisher):
681      def PanTool(self):      def PanTool(self):
682          """Start the pan tool"""          """Start the pan tool"""
683          self.SelectTool(PanTool(self))          self.SelectTool(PanTool(self))
684            #img = resource.GetImageResource("pan", wxBITMAP_TYPE_XPM)
685            #bmp = resource.GetBitmapResource("pan", wxBITMAP_TYPE_XPM)
686            #print bmp
687            #img = wxImageFromBitmap(bmp)
688            #print img
689            #cur = wxCursor(img)
690            #print cur
691            #self.SetCursor(cur)
692    
693      def IdentifyTool(self):      def IdentifyTool(self):
694          """Start the identify tool"""          """Start the identify tool"""
# Line 639  class MapCanvas(wxWindow, Publisher): Line 767  class MapCanvas(wxWindow, Publisher):
767          # Even when the window becomes larger some parts of the bitmap          # Even when the window becomes larger some parts of the bitmap
768          # could be reused.          # could be reused.
769          self.full_redraw()          self.full_redraw()
770            pass
771    
772      def shape_selected(self, layer, shape):      def shape_selected(self, layer, shape):
773          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""
# Line 692  class MapCanvas(wxWindow, Publisher): Line 821  class MapCanvas(wxWindow, Publisher):
821              forward = None              forward = None
822    
823          scale = self.scale          scale = self.scale
824    
825            if scale == 0:
826                return None, None
827    
828          offx, offy = self.offset          offx, offy = self.offset
829    
830          if select_labels:          if select_labels:
# Line 741  class MapCanvas(wxWindow, Publisher): Line 874  class MapCanvas(wxWindow, Publisher):
874                  continue                  continue
875    
876              filled = layer.GetClassification().GetDefaultFill() \              filled = layer.GetClassification().GetDefaultFill() \
877                       is not Color.None                       is not Color.Transparent
878              stroked = layer.GetClassification().GetDefaultLineColor() \              stroked = layer.GetClassification().GetDefaultLineColor() \
879                        is not Color.None                        is not Color.Transparent
880    
881              layer_proj = layer.projection              layer_proj = layer.projection
882              if layer_proj is not None:              if layer_proj is not None:
# Line 884  class MapCanvas(wxWindow, Publisher): Line 1017  class MapCanvas(wxWindow, Publisher):
1017                      valign = ALIGN_CENTER                      valign = ALIGN_CENTER
1018                  label_layer.AddLabel(x, y, text,                  label_layer.AddLabel(x, y, text,
1019                                       halign = halign, valign = valign)                                       halign = halign, valign = valign)
1020    
1021    def OutputTransform(canvas_scale, canvas_offset, canvas_size, device_extend):
1022        """Calculate dimensions to transform canvas content to output device."""
1023        width, height = device_extend
1024    
1025        # Only 80 % of the with are available for the map
1026        width = width * 0.8
1027    
1028        # Define the distance of the map from DC border
1029        distance = 20
1030    
1031        if height < width:
1032            # landscape
1033            map_height = height - 2*distance
1034            map_width = map_height
1035        else:
1036            # portrait, recalibrate width (usually the legend width is too
1037            # small
1038            width = width * 0.9
1039            map_height = width - 2*distance
1040            map_width = map_height
1041        
1042        mapregion = (distance, distance,
1043                     distance+map_width, distance+map_height)
1044    
1045        canvas_width, canvas_height = canvas_size
1046        
1047        scalex = map_width / (canvas_width/canvas_scale)
1048        scaley = map_height / (canvas_height/canvas_scale)
1049        scale = min(scalex, scaley)
1050        canvas_offx, canvas_offy = canvas_offset
1051        offx = scale*canvas_offx/canvas_scale
1052        offy = scale*canvas_offy/canvas_scale
1053    
1054        return scale, (offx, offy), mapregion
Legend:
Removed from v.535  
changed lines
  Added in v.1105
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