root/gaphor/tags/gaphor-0.12.0/gaphor/ui/propertyeditor.py

Revision 1863, 2.9 kB (checked in by arj..@yirdis.nl, 1 year ago)

Update property editor when a subject is connected to the selected diagram item.

Line 
1 """
2 """
3
4
5 import gtk
6 from zope import interface, component
7
8 from gaphor.core import _
9 from gaphor.UML.interfaces import IAssociationChangeEvent
10 from gaphor.UML import Presentation
11 from interfaces import IPropertyPage, IDiagramSelectionChange
12
13
14 class PropertyEditor(object):
15     """
16     The Property Editor pane.
17     """
18
19     def __init__(self):
20         super(PropertyEditor, self).__init__()
21         self._current_item = None
22         self._last_tab = _('Properties')
23    
24     def construct(self):
25         self.notebook = gtk.Notebook()
26         self.notebook.set_scrollable(True)
27         self.notebook.set_show_border(True)
28         self.notebook.set_tab_pos(gtk.POS_LEFT)
29         self.notebook.connect('switch-page', self._on_switch_page)
30        
31         # Make sure we recieve
32         component.provideHandler(self._selection_change)
33         component.provideHandler(self._element_changed)
34        
35         return self.notebook
36
37     def create_tabs_for_item(self, item):
38         """
39         Load all tabs that can operate on the given item.
40         """
41         last_tab = self._last_tab
42         for name, adapter in component.getAdapters([item,], IPropertyPage):
43             self.notebook.prepend_page(adapter.construct(), gtk.Label(name))
44         self.notebook.show_all()
45
46         self._last_tab = last_tab
47
48         # Show the last selected tab again.
49         for page_num in range(0, self.notebook.get_n_pages()):
50             page = self.notebook.get_nth_page(page_num)
51             label_text = self.notebook.get_tab_label_text(page)
52             if label_text == self._last_tab:
53                 self.notebook.set_current_page(page_num)
54                 break
55
56            
57        
58     def clear_all_tabs(self):
59         """
60         Remove all tabs from the notebook.
61         """
62         last_tab = self._last_tab
63         while self.notebook.get_n_pages():
64             self.notebook.remove_page(0)
65         self._last_tab = last_tab
66        
67     def _on_switch_page(self, notebook, page, page_num):
68         page = self.notebook.get_nth_page(page_num)
69         label_text = self.notebook.get_tab_label_text(page)
70         self._last_tab = label_text
71
72     @component.adapter(IDiagramSelectionChange)
73     def _selection_change(self, event):
74         """
75         Called when a diagram item receives focus.
76         
77         This reloads all tabs based on the current selection.
78         """
79         item = event.focused_item
80         if item is self._current_item:
81             return
82
83         self._current_item = item
84         self.clear_all_tabs()
85
86         if item is None:
87             return
88         self.create_tabs_for_item(item)
89
90     @component.adapter(IAssociationChangeEvent)
91     def _element_changed(self, event):
92         element = event.element
93         if event.property is Presentation.subject:
94             if element is self._current_item:
95                 self.clear_all_tabs()
96                 self.create_tabs_for_item(self._current_item)
97
98
99 # vim:sw=4:et:ai
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