/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/view.py
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revision 57 by bh, Thu Sep 13 13:55:33 2001 UTC revision 122 by bh, Mon Apr 29 18:04:54 2002 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001 by Intevation GmbH  # Copyright (c) 2001, 2002 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  #  #
# Line 15  from math import hypot Line 15  from math import hypot
15    
16  from wxPython.wx import wxWindow,\  from wxPython.wx import wxWindow,\
17       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\       wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\
18       EVT_PAINT, EVT_LEFT_DOWN, EVT_LEFT_UP, EVT_MOTION       EVT_PAINT, EVT_LEFT_DOWN, EVT_LEFT_UP, EVT_MOTION, EVT_LEAVE_WINDOW
19    
20    
21  from wxPython import wx  from wxPython import wx
# Line 29  from Thuban.Model.layer import SHAPETYPE Line 29  from Thuban.Model.layer import SHAPETYPE
29       SHAPETYPE_POINT       SHAPETYPE_POINT
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
33    
34  from renderer import ScreenRenderer, PrinterRender  from renderer import ScreenRenderer, PrinterRender
35    
36  import labeldialog  import labeldialog
37    
38  from messages import SELECTED_SHAPE  from messages import SELECTED_SHAPE, VIEW_POSITION
39    
40    
41  #  #
# Line 240  class MapPrintout(wx.wxPrintout): Line 240  class MapPrintout(wx.wxPrintout):
240          return wx.true          return wx.true
241                    
242    
243  class MapCanvas(wxWindow):  class MapCanvas(wxWindow, Publisher):
244    
245      """A widget that displays a map and offers some interaction"""      """A widget that displays a map and offers some interaction"""
246    
# Line 253  class MapCanvas(wxWindow): Line 253  class MapCanvas(wxWindow):
253          self.dragging = 0          self.dragging = 0
254          self.tool = None          self.tool = None
255          self.redraw_on_idle = 0          self.redraw_on_idle = 0
256            self.current_position = None
257          EVT_PAINT(self, self.OnPaint)          EVT_PAINT(self, self.OnPaint)
258          EVT_LEFT_DOWN(self, self.OnLeftDown)          EVT_LEFT_DOWN(self, self.OnLeftDown)
259          EVT_LEFT_UP(self, self.OnLeftUp)          EVT_LEFT_UP(self, self.OnLeftUp)
260          EVT_MOTION(self, self.OnMotion)          EVT_MOTION(self, self.OnMotion)
261            EVT_LEAVE_WINDOW(self, self.OnLeaveWindow)
262          wx.EVT_IDLE(self, self.OnIdle)          wx.EVT_IDLE(self, self.OnIdle)
263          self.interactor = interactor          self.interactor = interactor
264          self.interactor.Subscribe(SELECTED_SHAPE, self.shape_selected)          self.interactor.Subscribe(SELECTED_SHAPE, self.shape_selected)
265    
266        def __del__(self):
267            wxWindow.__del__(self)
268            Publisher.__del__(self)
269    
270      def OnPaint(self, event):      def OnPaint(self, event):
271          dc = wxPaintDC(self)          dc = wxPaintDC(self)
272          if self.map is not None and self.map.HasLayers():          if self.map is not None and self.map.HasLayers():
# Line 446  class MapCanvas(wxWindow): Line 452  class MapCanvas(wxWindow):
452      def CurrentTool(self):      def CurrentTool(self):
453          return self.tool and self.tool.Name() or None          return self.tool and self.tool.Name() or None
454    
455        def CurrentPosition(self):
456            """Return current position of the mouse in projected coordinates.
457    
458            The result is a 2-tuple of floats with the coordinates. If the
459            mouse is not in the window, the result is None.
460            """
461            if self.current_position is not None:
462                x, y = self.current_position
463                return self.win_to_proj(x, y)
464            else:
465                return None
466    
467        def set_current_position(self, event):
468            """Set the current position from event
469    
470            Should be called by all events that contain mouse positions
471            especially EVT_MOTION. The event paramete may be None to
472            indicate the the pointer left the window.
473            """
474            if event is not None:
475                self.current_position = (event.m_x, event.m_y)
476            else:
477                self.current_position = None
478            self.issue(VIEW_POSITION)
479    
480      def OnLeftDown(self, event):      def OnLeftDown(self, event):
481            self.set_current_position(event)
482          if self.tool is not None:          if self.tool is not None:
483              self.drag_dc = wxClientDC(self)              self.drag_dc = wxClientDC(self)
484              self.drag_dc.SetLogicalFunction(wxINVERT)              self.drag_dc.SetLogicalFunction(wxINVERT)
# Line 458  class MapCanvas(wxWindow): Line 490  class MapCanvas(wxWindow):
490                    
491      def OnLeftUp(self, event):      def OnLeftUp(self, event):
492          self.ReleaseMouse()          self.ReleaseMouse()
493            self.set_current_position(event)
494          if self.dragging:          if self.dragging:
495              self.tool.Hide(self.drag_dc)              self.tool.Hide(self.drag_dc)
496              self.tool.MouseUp(event)              self.tool.MouseUp(event)
# Line 465  class MapCanvas(wxWindow): Line 498  class MapCanvas(wxWindow):
498          self.dragging = 0          self.dragging = 0
499    
500      def OnMotion(self, event):      def OnMotion(self, event):
501            self.set_current_position(event)
502          if self.dragging:          if self.dragging:
503              self.tool.Hide(self.drag_dc)              self.tool.Hide(self.drag_dc)
504              self.tool.MouseMove(event)              self.tool.MouseMove(event)
505              self.tool.Show(self.drag_dc)              self.tool.Show(self.drag_dc)
506    
507        def OnLeaveWindow(self, event):
508            self.set_current_position(None)
509    
510      def OnIdle(self, event):      def OnIdle(self, event):
511          if self.redraw_on_idle:          if self.redraw_on_idle:
512              self.do_redraw()              self.do_redraw()
# Line 507  class MapCanvas(wxWindow): Line 544  class MapCanvas(wxWindow):
544                  dc = wxClientDC(self)                  dc = wxClientDC(self)
545                  font = wxFont(10, wx.wxSWISS, wx.wxNORMAL, wx.wxNORMAL)                  font = wxFont(10, wx.wxSWISS, wx.wxNORMAL, wx.wxNORMAL)
546                  dc.SetFont(font)                  dc.SetFont(font)
547                  for i in range(len(labels)):                  for i in range(len(labels) - 1, -1, -1):
548                      label = labels[i]                      label = labels[i]
549                      x = label.x                      x = label.x
550                      y = label.y                      y = label.y
# Line 565  class MapCanvas(wxWindow): Line 602  class MapCanvas(wxWindow):
602    
603              select_shape = -1              select_shape = -1
604              if shapetype == SHAPETYPE_POLYGON:              if shapetype == SHAPETYPE_POLYGON:
605                  for i in range(layer.NumShapes()):                  for i in range(layer.NumShapes() - 1, -1, -1):
606                      result = point_in_polygon_shape(layer.shapefile.cobject(),                      result = point_in_polygon_shape(layer.shapefile.cobject(),
607                                                      i,                                                      i,
608                                                      filled, stroked,                                                      filled, stroked,
# Line 576  class MapCanvas(wxWindow): Line 613  class MapCanvas(wxWindow):
613                          select_shape = i                          select_shape = i
614                          break                          break
615              elif shapetype == SHAPETYPE_ARC:              elif shapetype == SHAPETYPE_ARC:
616                  for i in range(layer.NumShapes()):                  for i in range(layer.NumShapes() - 1, -1, -1):
617                      result = point_in_polygon_shape(layer.shapefile.cobject(),                      result = point_in_polygon_shape(layer.shapefile.cobject(),
618                                                      i, 0, 1,                                                      i, 0, 1,
619                                                      map_proj, layer_proj,                                                      map_proj, layer_proj,
# Line 586  class MapCanvas(wxWindow): Line 623  class MapCanvas(wxWindow):
623                          select_shape = i                          select_shape = i
624                          break                          break
625              elif shapetype == SHAPETYPE_POINT:              elif shapetype == SHAPETYPE_POINT:
626                  for i in range(layer.NumShapes()):                  for i in range(layer.NumShapes() - 1, -1, -1):
627                      shape = layer.Shape(i)                      shape = layer.Shape(i)
628                      x, y = shape.Points()[0]                      x, y = shape.Points()[0]
629                      if inverse:                      if inverse:
# Line 604  class MapCanvas(wxWindow): Line 641  class MapCanvas(wxWindow):
641          return None, None          return None, None
642    
643      def SelectShapeAt(self, x, y):      def SelectShapeAt(self, x, y):
644          layer, shape = self.find_shape_at(x, y)          layer, shape = self.find_shape_at(x, y, selected_layer = 0)
645          # If layer is None, then shape will also be None. We don't want          # If layer is None, then shape will also be None. We don't want
646          # to deselect the currently selected layer, so we simply select          # to deselect the currently selected layer, so we simply select
647          # the already selected layer again.          # the already selected layer again.
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