/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 610 by jonathan, Fri Apr 4 13:56:59 2003 UTC revision 883 by jonathan, Fri May 9 16:34:39 2003 UTC
# Line 11  Classes for display of a map and interac Line 11  Classes for display of a map and interac
11    
12  __version__ = "$Revision$"  __version__ = "$Revision$"
13    
14    import sys
15    
16  from math import hypot  from math import hypot
17    
18  from wxPython.wx import wxWindow,\  from wxPython.wx import wxWindow,\
19       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\
20       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, \
21         wxBITMAP_TYPE_XPM, wxBeginBusyCursor, wxEndBusyCursor, wxCursor, \
22         wxImageFromBitmap
23    
24    
25  from wxPython import wx  from wxPython import wx
# Line 32  from Thuban.Model.label import ALIGN_CEN Line 36  from Thuban.Model.label import ALIGN_CEN
36  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
37  from Thuban.Model.color import Color  from Thuban.Model.color import Color
38    
39    import resource
40    
41  from selection import Selection  from selection import Selection
42  from renderer import ScreenRenderer, PrinterRender  from renderer import ScreenRenderer, PrinterRender
43    
44  import labeldialog  import labeldialog
45    
46  from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION  from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION, \
47                         SCALE_CHANGED
48    
49    
50  #  #
# Line 259  class MapCanvas(wxWindow, Publisher): Line 266  class MapCanvas(wxWindow, Publisher):
266      """A widget that displays a map and offers some interaction"""      """A widget that displays a map and offers some interaction"""
267    
268      # Some messages that can be subscribed/unsubscribed directly through      # Some messages that can be subscribed/unsubscribed directly through
269      # 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
270      # map those messages to the names of the instance variables they      # mapping those messages to the names of the instance variables they
271      # actually come from. This delegation is implemented in the      # actually come from. The delegation is implemented in the Subscribe
272      # Subscribe and unsubscribed methods      # and Unsubscribe methods
273      delegated_messages = {LAYER_SELECTED: "selection",      delegated_messages = {LAYER_SELECTED: "selection",
274                            SHAPES_SELECTED: "selection"}                            SHAPES_SELECTED: "selection"}
275    
# Line 271  class MapCanvas(wxWindow, Publisher): Line 278  class MapCanvas(wxWindow, Publisher):
278      delegated_methods = {"SelectLayer": "selection",      delegated_methods = {"SelectLayer": "selection",
279                           "SelectShapes": "selection",                           "SelectShapes": "selection",
280                           "SelectedLayer": "selection",                           "SelectedLayer": "selection",
281                           "HasSelectedLayer": "selection"}                           "HasSelectedLayer": "selection",
282                             "HasSelectedShapes": "selection",
283                             "SelectedShapes": "selection"}
284    
285      def __init__(self, parent, winid):      def __init__(self, parent, winid):
286          wxWindow.__init__(self, parent, winid)          wxWindow.__init__(self, parent, winid)
# Line 353  class MapCanvas(wxWindow, Publisher): Line 362  class MapCanvas(wxWindow, Publisher):
362    
363      def OnPaint(self, event):      def OnPaint(self, event):
364          dc = wxPaintDC(self)          dc = wxPaintDC(self)
365          if self.map is not None and self.map.HasLayers():          clear = self.map is None or not self.map.HasLayers()
366              self.do_redraw()  
367          else:          #wxBeginBusyCursor()
368    
369            if not clear:
370                try:
371                    self.do_redraw()
372                except:
373                    print "Error during drawing:", sys.exc_info()[0]
374                    clear = True
375    
376            if clear:
377              # 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
378              # the screen.              # the screen.
379    
# Line 367  class MapCanvas(wxWindow, Publisher): Line 385  class MapCanvas(wxWindow, Publisher):
385              dc.Clear()              dc.Clear()
386              dc.EndDrawing()              dc.EndDrawing()
387    
388            #wxEndBusyCursor()
389    
390      def do_redraw(self):      def do_redraw(self):
391          # This should only be called if we have a non-empty map.          # This should only be called if we have a non-empty map.
392    
# Line 383  class MapCanvas(wxWindow, Publisher): Line 403  class MapCanvas(wxWindow, Publisher):
403              dc.BeginDrawing()              dc.BeginDrawing()
404    
405              # clear the background              # clear the background
406              dc.SetBrush(wx.wxWHITE_BRUSH)              #dc.SetBrush(wx.wxWHITE_BRUSH)
407              dc.SetPen(wx.wxTRANSPARENT_PEN)              #dc.SetPen(wx.wxTRANSPARENT_PEN)
408              dc.DrawRectangle(0, 0, width, height)              #dc.DrawRectangle(0, 0, width, height)
409                dc.SetBackground(wx.wxWHITE_BRUSH)
410                dc.Clear()
411    
412              selected_layer = self.selection.SelectedLayer()              selected_layer = self.selection.SelectedLayer()
413              selected_shapes = self.selection.SelectedShapes()              selected_shapes = self.selection.SelectedShapes()
# Line 455  class MapCanvas(wxWindow, Publisher): Line 477  class MapCanvas(wxWindow, Publisher):
477          self.scale = scale          self.scale = scale
478          self.offset = offset          self.offset = offset
479          self.full_redraw()          self.full_redraw()
480            self.issue(SCALE_CHANGED, scale)
481    
482      def proj_to_win(self, x, y):      def proj_to_win(self, x, y):
483          """\          """\
# Line 479  class MapCanvas(wxWindow, Publisher): Line 502  class MapCanvas(wxWindow, Publisher):
502          width, height = self.GetSizeTuple()          width, height = self.GetSizeTuple()
503          llx, lly, urx, ury = rect          llx, lly, urx, ury = rect
504          if llx == urx or lly == ury:          if llx == urx or lly == ury:
505              # zero with or zero height. Do Nothing              # zero width or zero height. Do Nothing
506              return              return
507          scalex = width / (urx - llx)          scalex = width / (urx - llx)
508          scaley = height / (ury - lly)          scaley = height / (ury - lly)
# Line 498  class MapCanvas(wxWindow, Publisher): Line 521  class MapCanvas(wxWindow, Publisher):
521          if bbox is not None:          if bbox is not None:
522              self.FitRectToWindow(bbox)              self.FitRectToWindow(bbox)
523    
524        def FitLayerToWindow(self, layer):
525            """Fit the given layer to the window.
526    
527            Set the scale so that the layer fits exactly into the window and
528            center it in the window.
529            """
530            
531            bbox = layer.LatLongBoundingBox()
532            if bbox is not None:
533                proj = self.map.GetProjection()
534                if proj is not None:
535                    bbox = proj.ForwardBBox(bbox)
536    
537                if bbox is not None:
538                    self.FitRectToWindow(bbox)
539    
540        def FitSelectedToWindow(self):
541            layer = self.selection.SelectedLayer()
542            shapes = self.selection.SelectedShapes()
543    
544            bbox = layer.ShapesBoundingBox(shapes)
545            if bbox is not None:
546                proj = self.map.GetProjection()
547                if proj is not None:
548                    bbox = proj.ForwardBBox(bbox)
549    
550                if bbox is not None:
551                    self.FitRectToWindow(bbox)
552    
553      def ZoomFactor(self, factor, center = None):      def ZoomFactor(self, factor, center = None):
554          """Multiply the zoom by factor and center on center.          """Multiply the zoom by factor and center on center.
555    
# Line 561  class MapCanvas(wxWindow, Publisher): Line 613  class MapCanvas(wxWindow, Publisher):
613      def PanTool(self):      def PanTool(self):
614          """Start the pan tool"""          """Start the pan tool"""
615          self.SelectTool(PanTool(self))          self.SelectTool(PanTool(self))
616            #img = resource.GetImageResource("pan", wxBITMAP_TYPE_XPM)
617            #bmp = resource.GetBitmapResource("pan", wxBITMAP_TYPE_XPM)
618            #print bmp
619            #img = wxImageFromBitmap(bmp)
620            #print img
621            #cur = wxCursor(img)
622            #print cur
623            #self.SetCursor(cur)
624    
625      def IdentifyTool(self):      def IdentifyTool(self):
626          """Start the identify tool"""          """Start the identify tool"""
# Line 639  class MapCanvas(wxWindow, Publisher): Line 699  class MapCanvas(wxWindow, Publisher):
699          # Even when the window becomes larger some parts of the bitmap          # Even when the window becomes larger some parts of the bitmap
700          # could be reused.          # could be reused.
701          self.full_redraw()          self.full_redraw()
702            pass
703    
704      def shape_selected(self, layer, shape):      def shape_selected(self, layer, shape):
705          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""
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