/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 296 by bh, Fri Aug 30 16:10:45 2002 UTC revision 469 by jonathan, Wed Mar 5 18:19:25 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  #  #
# Line 30  from Thuban.Model.layer import SHAPETYPE Line 30  from Thuban.Model.layer import SHAPETYPE
30  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \  from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \
31       ALIGN_LEFT, ALIGN_RIGHT       ALIGN_LEFT, ALIGN_RIGHT
32  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
33    from Thuban.Model.color import Color
34    
35  from renderer import ScreenRenderer, PrinterRender  from renderer import ScreenRenderer, PrinterRender
36    
# Line 279  class MapCanvas(wxWindow, Publisher): Line 280  class MapCanvas(wxWindow, Publisher):
280          # if the mouse is outside the window.          # if the mouse is outside the window.
281          self.current_position = None          self.current_position = None
282    
         # If true, OnIdle will call do_redraw to do the actual  
         # redrawing. Set by OnPaint to avoid some unnecessary redraws.  
         # To force a redraw call full_redraw().  
         self.redraw_on_idle = 0  
   
283          # the bitmap serving as backing store          # the bitmap serving as backing store
284          self.bitmap = None          self.bitmap = None
285    
# Line 303  class MapCanvas(wxWindow, Publisher): Line 299  class MapCanvas(wxWindow, Publisher):
299          EVT_MOTION(self, self.OnMotion)          EVT_MOTION(self, self.OnMotion)
300          EVT_LEAVE_WINDOW(self, self.OnLeaveWindow)          EVT_LEAVE_WINDOW(self, self.OnLeaveWindow)
301          wx.EVT_SIZE(self, self.OnSize)          wx.EVT_SIZE(self, self.OnSize)
         wx.EVT_IDLE(self, self.OnIdle)  
302    
303      def __del__(self):      def __del__(self):
304          wxWindow.__del__(self)          wxWindow.__del__(self)
# Line 312  class MapCanvas(wxWindow, Publisher): Line 307  class MapCanvas(wxWindow, Publisher):
307      def OnPaint(self, event):      def OnPaint(self, event):
308          dc = wxPaintDC(self)          dc = wxPaintDC(self)
309          if self.map is not None and self.map.HasLayers():          if self.map is not None and self.map.HasLayers():
310              # We have a non-empty map. Redraw it in idle time              self.do_redraw()
             self.redraw_on_idle = 1  
311          else:          else:
312              # 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
313              # the screen.              # the screen.
# Line 504  class MapCanvas(wxWindow, Publisher): Line 498  class MapCanvas(wxWindow, Publisher):
498          offx, offy = self.offset          offx, offy = self.offset
499          self.set_view_transform(self.scale, (offx + dx, offy + dy))          self.set_view_transform(self.scale, (offx + dx, offy + dy))
500    
501        def SelectTool(self, tool):
502            """Make tool the active tool.
503    
504            The parameter should be an instance of Tool or None to indicate
505            that no tool is active.
506            """
507            self.tool = tool
508    
509      def ZoomInTool(self):      def ZoomInTool(self):
510          """Start the zoom in tool"""          """Start the zoom in tool"""
511          self.tool = ZoomInTool(self)          self.SelectTool(ZoomInTool(self))
512    
513      def ZoomOutTool(self):      def ZoomOutTool(self):
514          """Start the zoom out tool"""          """Start the zoom out tool"""
515          self.tool = ZoomOutTool(self)          self.SelectTool(ZoomOutTool(self))
516    
517      def PanTool(self):      def PanTool(self):
518          """Start the pan tool"""          """Start the pan tool"""
519          self.tool = PanTool(self)          self.SelectTool(PanTool(self))
520    
521      def IdentifyTool(self):      def IdentifyTool(self):
522          """Start the identify tool"""          """Start the identify tool"""
523          self.tool = IdentifyTool(self)          self.SelectTool(IdentifyTool(self))
524    
525      def LabelTool(self):      def LabelTool(self):
526          """Start the label tool"""          """Start the label tool"""
527          self.tool = LabelTool(self)          self.SelectTool(LabelTool(self))
528    
529      def CurrentTool(self):      def CurrentTool(self):
530          """Return the name of the current tool or None if no tool is active"""          """Return the name of the current tool or None if no tool is active"""
# Line 568  class MapCanvas(wxWindow, Publisher): Line 570  class MapCanvas(wxWindow, Publisher):
570          self.set_current_position(event)          self.set_current_position(event)
571          if self.dragging:          if self.dragging:
572              self.ReleaseMouse()              self.ReleaseMouse()
573              self.tool.Hide(self.drag_dc)              try:
574              self.tool.MouseUp(event)                  self.tool.Hide(self.drag_dc)
575              self.drag_dc = None                  self.tool.MouseUp(event)
576          self.dragging = 0              finally:
577                    self.drag_dc = None
578                    self.dragging = 0
579    
580      def OnMotion(self, event):      def OnMotion(self, event):
581          self.set_current_position(event)          self.set_current_position(event)
# Line 583  class MapCanvas(wxWindow, Publisher): Line 587  class MapCanvas(wxWindow, Publisher):
587      def OnLeaveWindow(self, event):      def OnLeaveWindow(self, event):
588          self.set_current_position(None)          self.set_current_position(None)
589    
     def OnIdle(self, event):  
         if self.redraw_on_idle:  
             self.do_redraw()  
         self.redraw_on_idle = 0  
   
590      def OnSize(self, event):      def OnSize(self, event):
591          # the window's size has changed. We have to get a new bitmap. If          # the window's size has changed. We have to get a new bitmap. If
592          # we want to be clever we could try to get by without throwing          # we want to be clever we could try to get by without throwing
# Line 618  class MapCanvas(wxWindow, Publisher): Line 617  class MapCanvas(wxWindow, Publisher):
617          self.last_selected_layer = layer          self.last_selected_layer = layer
618          self.last_selected_shape = shape          self.last_selected_shape = shape
619    
620      def unprojected_rect_around_point(self, x, y):      def unprojected_rect_around_point(self, x, y, dist):
621          """return a rect a few pixels around (x, y) in unprojected corrdinates          """return a rect dist pixels around (x, y) in unprojected corrdinates
622    
623          The return value is a tuple (minx, miny, maxx, maxy) suitable a          The return value is a tuple (minx, miny, maxx, maxy) suitable a
624          parameter to a layer's ShapesInRegion method.          parameter to a layer's ShapesInRegion method.
# Line 633  class MapCanvas(wxWindow, Publisher): Line 632  class MapCanvas(wxWindow, Publisher):
632          xs = []          xs = []
633          ys = []          ys = []
634          for dx, dy in ((-1, -1), (1, -1), (1, 1), (-1, 1)):          for dx, dy in ((-1, -1), (1, -1), (1, 1), (-1, 1)):
635              px, py = self.win_to_proj(x + dx, y + dy)              px, py = self.win_to_proj(x + dist * dx, y + dist * dy)
636              if inverse:              if inverse:
637                  px, py = inverse(px, py)                  px, py = inverse(px, py)
638              xs.append(px)              xs.append(px)
# Line 662  class MapCanvas(wxWindow, Publisher): Line 661  class MapCanvas(wxWindow, Publisher):
661          scale = self.scale          scale = self.scale
662          offx, offy = self.offset          offx, offy = self.offset
663    
         box = self.unprojected_rect_around_point(px, py)  
   
664          if select_labels:          if select_labels:
665              labels = self.map.LabelLayer().Labels()              labels = self.map.LabelLayer().Labels()
666    
# Line 710  class MapCanvas(wxWindow, Publisher): Line 707  class MapCanvas(wxWindow, Publisher):
707              if not layer.Visible():              if not layer.Visible():
708                  continue                  continue
709    
710              filled = layer.fill is not None              filled = layer.GetClassification().GetDefaultFill() \
711              stroked = layer.stroke is not None                       is not Color.None
712                stroked = layer.GetClassification().GetDefaultLineColor() \
713                          is not Color.None
714    
715              layer_proj = layer.projection              layer_proj = layer.projection
716              if layer_proj is not None:              if layer_proj is not None:
# Line 723  class MapCanvas(wxWindow, Publisher): Line 722  class MapCanvas(wxWindow, Publisher):
722    
723              select_shape = -1              select_shape = -1
724    
725                # Determine the ids of the shapes that overlap a tiny area
726                # around the point. For layers containing points we have to
727                # choose a larger size of the box we're testing agains so
728                # that we take the size of the markers into account
729                # FIXME: Once the markers are more flexible this part has to
730                # become more flexible too, of course
731                if shapetype == SHAPETYPE_POINT:
732                    box = self.unprojected_rect_around_point(px, py, 5)
733                else:
734                    box = self.unprojected_rect_around_point(px, py, 1)
735              shape_ids = layer.ShapesInRegion(box)              shape_ids = layer.ShapesInRegion(box)
736              shape_ids.reverse()              shape_ids.reverse()
737    
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