1 #!/usr/bin/env python
2
3 # example tree.c
4
5 import gtk
6
7 class TreeExample:
8 # for all the GtkItem:: and GtkTreeItem:: signals
9 def cb_itemsignal(self, item, signame):
10 # It's a Bin, so it has one child, which we know to be a
11 # label, so get that
12 label = item.children()[0]
13 # Get the text of the label
14 name = label.get()
15 # Get the level of the tree which the item is in
16 print "%s called for item %s->%s" % (signame, name, item)
17
18 # Note that this is never called
19 def cb_unselect_child(self, root_tree, child, subtree):
20 print ("unselect_child called for root tree %s, "
21 "subtree %s, child %s" % (root_tree, subtree, child))
22
23 # Note that this is called every time the user clicks on an item,
24 # whether it is already selected or not.
25 def cb_select_child(self, root_tree, child, subtree):
26 print ("select_child called for root tree %s, subtree %s, "
27 "child %s\n" % (root_tree, subtree, child))
28
29 def cb_selection_changed(self, tree):
30 print "selection_change called for tree %s" % tree
31 print "selected objects are:"
32
33 for item in tree.get_selection():
34 label = item.children()[0]
35 name = label.get()
36 print "\t%s" % name
37
38 def __init__(self):
39 itemnames = ["Foo", "Bar", "Baz", "Quux", "Maurice"]
40 # a generic toplevel window
41 window = gtk.GtkWindow(gtk.WINDOW_TOPLEVEL)
42 window.connect("delete_event", gtk.mainquit)
43 window.set_border_width(5)
44
45 # A generic scrolled window
46 scrolled_win = gtk.GtkScrolledWindow()
47 scrolled_win.set_policy(gtk.POLICY_AUTOMATIC,
48 gtk.POLICY_AUTOMATIC)
49 scrolled_win.set_usize(150, 200)
50 window.add(scrolled_win)
51 scrolled_win.show()
52
53 # Create the root tree
54 tree = gtk.GtkTree()
55 print "root tree is %s" % tree
56 # connect all GtkTree:: signals
57 tree.connect("select_child", self.cb_select_child, tree)
58 tree.connect("unselect_child", self.cb_unselect_child, tree)
59 tree.connect("selection_changed", self.cb_selection_changed)
60 # Add it to the scrolled window
61 scrolled_win.add_with_viewport(tree)
62 # Set the selection mode
63 tree.set_selection_mode(gtk.SELECTION_MULTIPLE)
64 # Show it
65 tree.show()
66
67 for i in range(5):
68 # Create a tree item
69 item = gtk.GtkTreeItem(itemnames[i])
70 # Connect all GtkItem:: and GtkTreeItem:: signals
71 item.connect("select", self.cb_itemsignal, "select")
72 item.connect("deselect", self.cb_itemsignal, "deselect")
73 item.connect("toggle", self.cb_itemsignal, "toggle")
74 item.connect("expand", self.cb_itemsignal, "expand")
75 item.connect("collapse", self.cb_itemsignal, "collapse")
76 # Add it to the parent tree
77 tree.append(item)
78 # Show it - this can be done at any time
79 item.show()
80 # Create this item's subtree
81 subtree = gtk.GtkTree()
82 print "-> item %s->%s, subtree %s" % (itemnames[i], item, subtree)
83
84 # This is still necessary if you want these signals to be called
85 # for the subtree's children. Note that selection_change will be
86 # signalled for the root tree regardless.
87 subtree.connect("select_child", self.cb_select_child, subtree)
88 subtree.connect("unselect_child", self.cb_unselect_child, subtree)
89 # This has absolutely no effect, because it is completely ignored
90 # in subtrees
91 subtree.set_selection_mode(gtk.SELECTION_SINGLE)
92 # Neither does this, but for a rather different reason - the
93 # view_mode and view_line values of a tree are propagated to
94 # subtrees when they are mapped. So, setting it later on would
95 # actually have a (somewhat unpredictable) effect
96 subtree.set_view_mode(gtk.TREE_VIEW_ITEM)
97 # Set this item's subtree - note that you cannot do this until
98 # AFTER the item has been added to its parent tree!
99 item.set_subtree(subtree)
100
101 for j in range(5):
102 # Create a subtree item, in much the same way
103 subitem = gtk.GtkTreeItem(itemnames[j])
104 # Connect all GtkItem:: and GtkTreeItem:: signals
105 subitem.connect("select", self.cb_itemsignal, "select")
106 subitem.connect("deselect", self.cb_itemsignal, "deselect")
107 subitem.connect("toggle", self.cb_itemsignal, "toggle")
108 subitem.connect("expand", self.cb_itemsignal, "expand")
109 subitem.connect("collapse", self.cb_itemsignal, "collapse")
110 print "-> -> item %s->%s\n" % (itemnames[j], subitem)
111 # Add it to its parent tree
112 subtree.append(subitem)
113 # Show it
114 subitem.show()
115 # Show the window and loop endlessly
116 window.show()
117
118 def main():
119 gtk.mainloop()
120 return 0
121
122 if __name__ == "__main__":
123 TreeExample()
124 main()
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