/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 565 by jonathan, Wed Mar 26 11:07:40 2003 UTC revision 926 by frank, Mon May 19 12:09:01 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    
# Line 32  from Thuban.Model.label import ALIGN_CEN Line 44  from Thuban.Model.label import ALIGN_CEN
44  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
45  from Thuban.Model.color import Color  from Thuban.Model.color import Color
46    
47    import resource
48    
49  from selection import Selection  from selection import Selection
50  from renderer import ScreenRenderer, PrinterRender  from renderer import ScreenRenderer, ExportRenderer, PrinterRenderer
51    
52  import labeldialog  import labeldialog
53    
54  from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION  from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION, \
55                         SCALE_CHANGED
56    
57    
58  #  #
# Line 217  class LabelTool(Tool): Line 232  class LabelTool(Tool):
232          self.view.LabelShapeAt(event.m_x, event.m_y)          self.view.LabelShapeAt(event.m_x, event.m_y)
233    
234    
   
   
235  class MapPrintout(wx.wxPrintout):  class MapPrintout(wx.wxPrintout):
236    
237      """      """
238      wxPrintout class for printing Thuban maps      wxPrintout class for printing Thuban maps
239      """      """
240    
241      def __init__(self, map):      def __init__(self, canvas, map, region, selected_layer, selected_shapes):
242          wx.wxPrintout.__init__(self)          wx.wxPrintout.__init__(self)
243            self.canvas = canvas
244          self.map = map          self.map = map
245            self.region = region
246            self.selected_layer = selected_layer
247            self.selected_shapes = selected_shapes
248    
249      def GetPageInfo(self):      def GetPageInfo(self):
250          return (1, 1, 1, 1)          return (1, 1, 1, 1)
# Line 241  class MapPrintout(wx.wxPrintout): Line 258  class MapPrintout(wx.wxPrintout):
258    
259      def draw_on_dc(self, dc):      def draw_on_dc(self, dc):
260          width, height = self.GetPageSizePixels()          width, height = self.GetPageSizePixels()
261          llx, lly, urx, ury = self.map.ProjectedBoundingBox()          scale, offset, mapregion = OutputTransform(self.canvas.scale,
262          scalex = width / (urx - llx)                                                     self.canvas.offset,
263          scaley = height / (ury - lly)                                                     self.canvas.GetSizeTuple(),
264          scale = min(scalex, scaley)                                                     self.GetPageSizePixels())
         offx = 0.5 * (width - (urx + llx) * scale)  
         offy = 0.5 * (height + (ury + lly) * scale)  
   
265          resx, resy = self.GetPPIPrinter()          resx, resy = self.GetPPIPrinter()
266          renderer = PrinterRender(dc, scale, (offx, offy), resolution = resx)          renderer = PrinterRenderer(dc, scale, offset, resolution = resy)
267          renderer.RenderMap(self.map)          x, y, width, height = self.region
268            canvas_scale = self.canvas.scale
269            renderer.RenderMap(self.map,
270                               (0,0,
271                                    (width/canvas_scale)*scale,
272                                    (height/canvas_scale)*scale),
273                                    mapregion,
274                               self.selected_layer, self.selected_shapes)
275          return wx.true          return wx.true
276    
277    
# Line 259  class MapCanvas(wxWindow, Publisher): Line 280  class MapCanvas(wxWindow, Publisher):
280      """A widget that displays a map and offers some interaction"""      """A widget that displays a map and offers some interaction"""
281    
282      # Some messages that can be subscribed/unsubscribed directly through      # Some messages that can be subscribed/unsubscribed directly through
283      # 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
284      # map those messages to the names of the instance variables they      # mapping those messages to the names of the instance variables they
285      # actually come from. This delegation is implemented in the      # actually come from. The delegation is implemented in the Subscribe
286      # Subscribe and unsubscribed methods      # and Unsubscribe methods
287      delegated_messages = {LAYER_SELECTED: "selection",      delegated_messages = {LAYER_SELECTED: "selection",
288                            SHAPES_SELECTED: "selection"}                            SHAPES_SELECTED: "selection"}
289    
# Line 271  class MapCanvas(wxWindow, Publisher): Line 292  class MapCanvas(wxWindow, Publisher):
292      delegated_methods = {"SelectLayer": "selection",      delegated_methods = {"SelectLayer": "selection",
293                           "SelectShapes": "selection",                           "SelectShapes": "selection",
294                           "SelectedLayer": "selection",                           "SelectedLayer": "selection",
295                           "HasSelectedLayer": "selection"}                           "HasSelectedLayer": "selection",
296                             "HasSelectedShapes": "selection",
297                             "SelectedShapes": "selection"}
298    
299      def __init__(self, parent, winid):      def __init__(self, parent, winid):
300          wxWindow.__init__(self, parent, winid)          wxWindow.__init__(self, parent, winid)
# Line 353  class MapCanvas(wxWindow, Publisher): Line 376  class MapCanvas(wxWindow, Publisher):
376    
377      def OnPaint(self, event):      def OnPaint(self, event):
378          dc = wxPaintDC(self)          dc = wxPaintDC(self)
379          if self.map is not None and self.map.HasLayers():          clear = self.map is None or not self.map.HasLayers()
380              self.do_redraw()  
381          else:          #wxBeginBusyCursor()
382    
383            if not clear:
384                try:
385                    self.do_redraw()
386                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              # If we've got no map or if the map is empty, simply clear
392              # the screen.              # the screen.
393    
# Line 367  class MapCanvas(wxWindow, Publisher): Line 399  class MapCanvas(wxWindow, Publisher):
399              dc.Clear()              dc.Clear()
400              dc.EndDrawing()              dc.EndDrawing()
401    
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.
406    
# 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 hasattr(self, "export_path"):
451                export_path = self.export_path
452            else:
453                export_path="."
454            dlg = wxFileDialog(self, _("Export Map"), export_path, "",
455                               "Enhanced Metafile (*.wmf)|*.wmf",
456                               wxSAVE|wxOVERWRITE_PROMPT)
457            if dlg.ShowModal() == wxID_OK:
458                self.export_path = os.path.dirname(dlg.GetPath())
459                dc = wxMetaFileDC(dlg.GetPath())
460        
461                scale, offset, mapregion = OutputTransform(self.scale,
462                                                           self.offset,
463                                                           self.GetSizeTuple(),
464                                                           dc.GetSizeTuple())
465    
466                selected_layer = self.selection.SelectedLayer()
467                selected_shapes = self.selection.SelectedShapes()
468    
469                renderer = ExportRenderer(dc, scale, offset)
470    
471                # Pass the entire bitmap as update region to the renderer.
472                # We're redrawing the whole bitmap, after all.
473                width, height = self.GetSizeTuple()
474                renderer.RenderMap(self.map,
475                                    (0,0,
476                                        (width/self.scale)*scale,
477                                        (height/self.scale)*scale),
478                                    mapregion,
479                                    selected_layer, selected_shapes)
480                dc.EndDrawing()
481                dc.Close()
482            dlg.Destroy()
483            
484      def Print(self):      def Print(self):
485          printer = wx.wxPrinter()          printer = wx.wxPrinter()
486          printout = MapPrintout(self.map)          width, height = self.GetSizeTuple()
487            selected_layer = self.selection.SelectedLayer()
488            selected_shapes = self.selection.SelectedShapes()
489            
490            printout = MapPrintout(self, self.map, (0, 0, width, height),
491                                   selected_layer, selected_shapes)
492          printer.Print(self, printout, wx.true)          printer.Print(self, printout, wx.true)
493          printout.Destroy()          printout.Destroy()
494    
# Line 455  class MapCanvas(wxWindow, Publisher): Line 531  class MapCanvas(wxWindow, Publisher):
531          self.scale = scale          self.scale = scale
532          self.offset = offset          self.offset = offset
533          self.full_redraw()          self.full_redraw()
534            self.issue(SCALE_CHANGED, scale)
535    
536      def proj_to_win(self, x, y):      def proj_to_win(self, x, y):
537          """\          """\
# Line 479  class MapCanvas(wxWindow, Publisher): Line 556  class MapCanvas(wxWindow, Publisher):
556          width, height = self.GetSizeTuple()          width, height = self.GetSizeTuple()
557          llx, lly, urx, ury = rect          llx, lly, urx, ury = rect
558          if llx == urx or lly == ury:          if llx == urx or lly == ury:
559              # zero with or zero height. Do Nothing              # zero width or zero height. Do Nothing
560              return              return
561          scalex = width / (urx - llx)          scalex = width / (urx - llx)
562          scaley = height / (ury - lly)          scaley = height / (ury - lly)
# Line 498  class MapCanvas(wxWindow, Publisher): Line 575  class MapCanvas(wxWindow, Publisher):
575          if bbox is not None:          if bbox is not None:
576              self.FitRectToWindow(bbox)              self.FitRectToWindow(bbox)
577    
578        def FitLayerToWindow(self, layer):
579            """Fit the given layer to the window.
580    
581            Set the scale so that the layer fits exactly into the window and
582            center it in the window.
583            """
584            
585            bbox = layer.LatLongBoundingBox()
586            if bbox is not None:
587                proj = self.map.GetProjection()
588                if proj is not None:
589                    bbox = proj.ForwardBBox(bbox)
590    
591                if bbox is not None:
592                    self.FitRectToWindow(bbox)
593    
594        def FitSelectedToWindow(self):
595            layer = self.selection.SelectedLayer()
596            shapes = self.selection.SelectedShapes()
597    
598            bbox = layer.ShapesBoundingBox(shapes)
599            if bbox is not None:
600                proj = self.map.GetProjection()
601                if proj is not None:
602                    bbox = proj.ForwardBBox(bbox)
603    
604                if bbox is not None:
605                    self.FitRectToWindow(bbox)
606    
607      def ZoomFactor(self, factor, center = None):      def ZoomFactor(self, factor, center = None):
608          """Multiply the zoom by factor and center on center.          """Multiply the zoom by factor and center on center.
609    
# Line 561  class MapCanvas(wxWindow, Publisher): Line 667  class MapCanvas(wxWindow, Publisher):
667      def PanTool(self):      def PanTool(self):
668          """Start the pan tool"""          """Start the pan tool"""
669          self.SelectTool(PanTool(self))          self.SelectTool(PanTool(self))
670            #img = resource.GetImageResource("pan", wxBITMAP_TYPE_XPM)
671            #bmp = resource.GetBitmapResource("pan", wxBITMAP_TYPE_XPM)
672            #print bmp
673            #img = wxImageFromBitmap(bmp)
674            #print img
675            #cur = wxCursor(img)
676            #print cur
677            #self.SetCursor(cur)
678    
679      def IdentifyTool(self):      def IdentifyTool(self):
680          """Start the identify tool"""          """Start the identify tool"""
# Line 639  class MapCanvas(wxWindow, Publisher): Line 753  class MapCanvas(wxWindow, Publisher):
753          # Even when the window becomes larger some parts of the bitmap          # Even when the window becomes larger some parts of the bitmap
754          # could be reused.          # could be reused.
755          self.full_redraw()          self.full_redraw()
756            pass
757    
758      def shape_selected(self, layer, shape):      def shape_selected(self, layer, shape):
759          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""
# Line 741  class MapCanvas(wxWindow, Publisher): Line 856  class MapCanvas(wxWindow, Publisher):
856                  continue                  continue
857    
858              filled = layer.GetClassification().GetDefaultFill() \              filled = layer.GetClassification().GetDefaultFill() \
859                       is not Color.None                       is not Color.Transparent
860              stroked = layer.GetClassification().GetDefaultLineColor() \              stroked = layer.GetClassification().GetDefaultLineColor() \
861                        is not Color.None                        is not Color.Transparent
862    
863              layer_proj = layer.projection              layer_proj = layer.projection
864              if layer_proj is not None:              if layer_proj is not None:
# Line 884  class MapCanvas(wxWindow, Publisher): Line 999  class MapCanvas(wxWindow, Publisher):
999                      valign = ALIGN_CENTER                      valign = ALIGN_CENTER
1000                  label_layer.AddLabel(x, y, text,                  label_layer.AddLabel(x, y, text,
1001                                       halign = halign, valign = valign)                                       halign = halign, valign = valign)
1002    
1003    def OutputTransform(canvas_scale, canvas_offset, canvas_size, device_extend):
1004        """Calculate dimensions to transform canvas content to output device."""
1005        width, height = device_extend
1006    
1007        # Only 80 % of the with are available for the map
1008        width = width * 0.8
1009    
1010        # Define the distance of the map from DC border
1011        distance = 20
1012    
1013        if height < width:
1014            # landscape
1015            map_height = height - 2*distance
1016            map_width = map_height
1017        else:
1018            # portrait, recalibrate width (usually the legend width is too
1019            # small
1020            width = width * 0.9
1021            map_height = width - 2*distance
1022            map_width = map_height
1023        
1024        mapregion = (distance, distance,
1025                     distance+map_width, distance+map_height)
1026    
1027        canvas_width, canvas_height = canvas_size
1028        
1029        scalex = map_width / (canvas_width/canvas_scale)
1030        scaley = map_height / (canvas_height/canvas_scale)
1031        scale = min(scalex, scaley)
1032        canvas_offx, canvas_offy = canvas_offset
1033        offx = scale*canvas_offx/canvas_scale
1034        offy = scale*canvas_offy/canvas_scale
1035    
1036        return scale, (offx, offy), mapregion
Legend:
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  Added in v.926
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