/[ascend]/branches/mike/pygtk/canvas/blockcanvas.py
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Contents of /branches/mike/pygtk/canvas/blockcanvas.py

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Revision 1966 - (show annotations) (download) (as text)
Mon Dec 1 07:13:49 2008 UTC (9 years, 8 months ago) by jpye
Original Path: trunk/pygtk/canvas/blockcanvas.py
File MIME type: text/x-python
File size: 1664 byte(s)
Icon palette uses custom SVGs as specified in MODEL NOTES.
Added icons for out simple test models.
1 from gaphas import Canvas
2
3 class BlockCanvas(Canvas):
4 def update_constraints(self, items):
5 """
6 Update constraints. Also variables may be marked as dirty before the
7 constraint solver kicks in.
8 """
9 # request solving of external constraints associated with dirty items
10 request_resolve = self._solver.request_resolve
11 for item in items:
12 if hasattr(item,'ports'):
13 for p in item.ports:
14 request_resolve(p.x)
15 request_resolve(p.y)
16
17 super(BlockCanvas,self).update_constraints(items)
18
19 def _normalize(self, items):
20 """
21 Correct offset of ports due to movement of left-side handles.
22 """
23 dirty_matrix_items = set()
24 for item in items:
25 if not hasattr(item, 'ports'):
26 continue
27 handles = item.handles()
28 ports = item.ports
29 if not handles or not ports:
30 continue
31 x, y = map(float, handles[0].pos)
32 # Dirty marking is done by the superclass' method
33 if x:
34 for p in ports:
35 p.x._value -= x
36 if y:
37 for p in ports:
38 p.y._value -= y
39 dirty_matrix_items.update(super(BlockCanvas, self)._normalize(items))
40 return dirty_matrix_items
41
42 def reattach_ascend(self, library, notesdb):
43 # FIXME still need a way of iterating through these items
44 items = []
45 for item in self.get_all_items():
46 if not hasattr(item, 'blockinstance'):
47 continue
48 bi = item.blockinstance
49 if bi.blocktype.type is None:
50 bi.blocktype.reattach_ascend(library, notesdb)
51
52 def __getstate__(self):
53 return super(BlockCanvas,self).__getstate__()
54
55 def __setstate__(self, state):
56 super(BlockCanvas,self).__setstate__(state)
57

john.pye@anu.edu.au
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