/[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 824 by jonathan, Tue May 6 08:09:27 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    
# Line 259  class MapCanvas(wxWindow, Publisher): Line 265  class MapCanvas(wxWindow, Publisher):
265      """A widget that displays a map and offers some interaction"""      """A widget that displays a map and offers some interaction"""
266    
267      # Some messages that can be subscribed/unsubscribed directly through      # Some messages that can be subscribed/unsubscribed directly through
268      # 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
269      # map those messages to the names of the instance variables they      # mapping those messages to the names of the instance variables they
270      # actually come from. This delegation is implemented in the      # actually come from. The delegation is implemented in the Subscribe
271      # Subscribe and unsubscribed methods      # and Unsubscribe methods
272      delegated_messages = {LAYER_SELECTED: "selection",      delegated_messages = {LAYER_SELECTED: "selection",
273                            SHAPES_SELECTED: "selection"}                            SHAPES_SELECTED: "selection"}
274    
# Line 353  class MapCanvas(wxWindow, Publisher): Line 359  class MapCanvas(wxWindow, Publisher):
359    
360      def OnPaint(self, event):      def OnPaint(self, event):
361          dc = wxPaintDC(self)          dc = wxPaintDC(self)
362          if self.map is not None and self.map.HasLayers():          clear = self.map is None or not self.map.HasLayers()
363              self.do_redraw()  
364          else:          #wxBeginBusyCursor()
365    
366            if not clear:
367                try:
368                    self.do_redraw()
369                except:
370                    print "Error during drawing:", sys.exc_info()[0]
371                    clear = True
372    
373            if clear:
374              # 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
375              # the screen.              # the screen.
376    
# Line 367  class MapCanvas(wxWindow, Publisher): Line 382  class MapCanvas(wxWindow, Publisher):
382              dc.Clear()              dc.Clear()
383              dc.EndDrawing()              dc.EndDrawing()
384    
385            #wxEndBusyCursor()
386    
387      def do_redraw(self):      def do_redraw(self):
388          # This should only be called if we have a non-empty map.          # This should only be called if we have a non-empty map.
389    
# Line 383  class MapCanvas(wxWindow, Publisher): Line 400  class MapCanvas(wxWindow, Publisher):
400              dc.BeginDrawing()              dc.BeginDrawing()
401    
402              # clear the background              # clear the background
403              dc.SetBrush(wx.wxWHITE_BRUSH)              #dc.SetBrush(wx.wxWHITE_BRUSH)
404              dc.SetPen(wx.wxTRANSPARENT_PEN)              #dc.SetPen(wx.wxTRANSPARENT_PEN)
405              dc.DrawRectangle(0, 0, width, height)              #dc.DrawRectangle(0, 0, width, height)
406                dc.SetBackground(wx.wxWHITE_BRUSH)
407                dc.Clear()
408    
409              selected_layer = self.selection.SelectedLayer()              selected_layer = self.selection.SelectedLayer()
410              selected_shapes = self.selection.SelectedShapes()              selected_shapes = self.selection.SelectedShapes()
# Line 479  class MapCanvas(wxWindow, Publisher): Line 498  class MapCanvas(wxWindow, Publisher):
498          width, height = self.GetSizeTuple()          width, height = self.GetSizeTuple()
499          llx, lly, urx, ury = rect          llx, lly, urx, ury = rect
500          if llx == urx or lly == ury:          if llx == urx or lly == ury:
501              # zero with or zero height. Do Nothing              # zero width or zero height. Do Nothing
502              return              return
503          scalex = width / (urx - llx)          scalex = width / (urx - llx)
504          scaley = height / (ury - lly)          scaley = height / (ury - lly)
# Line 498  class MapCanvas(wxWindow, Publisher): Line 517  class MapCanvas(wxWindow, Publisher):
517          if bbox is not None:          if bbox is not None:
518              self.FitRectToWindow(bbox)              self.FitRectToWindow(bbox)
519    
520        def FitLayerToWindow(self, layer):
521            """Fit the given layer to the window.
522    
523            Set the scale so that the layer fits exactly into the window and
524            center it in the window.
525            """
526            
527            bbox = layer.LatLongBoundingBox()
528            if bbox is not None:
529                proj = self.map.GetProjection()
530                if proj is not None:
531                    bbox = proj.ForwardBBox(bbox)
532    
533                if bbox is not None:
534                    self.FitRectToWindow(bbox)
535    
536      def ZoomFactor(self, factor, center = None):      def ZoomFactor(self, factor, center = None):
537          """Multiply the zoom by factor and center on center.          """Multiply the zoom by factor and center on center.
538    
# Line 561  class MapCanvas(wxWindow, Publisher): Line 596  class MapCanvas(wxWindow, Publisher):
596      def PanTool(self):      def PanTool(self):
597          """Start the pan tool"""          """Start the pan tool"""
598          self.SelectTool(PanTool(self))          self.SelectTool(PanTool(self))
599            #img = resource.GetImageResource("pan", wxBITMAP_TYPE_XPM)
600            #bmp = resource.GetBitmapResource("pan", wxBITMAP_TYPE_XPM)
601            #print bmp
602            #img = wxImageFromBitmap(bmp)
603            #print img
604            #cur = wxCursor(img)
605            #print cur
606            #self.SetCursor(cur)
607    
608      def IdentifyTool(self):      def IdentifyTool(self):
609          """Start the identify tool"""          """Start the identify tool"""
# Line 639  class MapCanvas(wxWindow, Publisher): Line 682  class MapCanvas(wxWindow, Publisher):
682          # Even when the window becomes larger some parts of the bitmap          # Even when the window becomes larger some parts of the bitmap
683          # could be reused.          # could be reused.
684          self.full_redraw()          self.full_redraw()
685            pass
686    
687      def shape_selected(self, layer, shape):      def shape_selected(self, layer, shape):
688          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""          """Receiver for the SHAPES_SELECTED messages. Redraw the map."""
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