[pygtk] Selection weirdness in TreeView

[Jeffrey Barish]

Select a child row in a TreeView.  Collapse the parent.  Expand the parent.  
The child is no longer selected.  As illustrated in the attached program, 
the child row was deselected immediately on clicking the expander to 
collapse the parent -- even before the collapse signal was emitted.  Is this 
the behavior that we should expect?  I expected that collapse/expand would 
have no impact on selection.  Moreover, I think that GTK used to work that 
way.  Regardless, I am wondering whether the current behavior is correct or 
a bug.  On my system, gtk.ver is (2, 21, 5) and gobject.glib_version is (2, 
26, 1).

------------------------------------
"""Select a child, collapse the parent, expand the parent: the child is no 
longer selected."""

import gtk

class SelectChildTestApp(object):
    def __init__(self):
        self.window = gtk.Window()
        self.window.set_size_request(200, -1)
        self.window.connect("destroy", gtk.main_quit)

        treestore = gtk.TreeStore(str)
        treeview = gtk.TreeView(treestore)
        cell = gtk.CellRendererText()
        col = gtk.TreeViewColumn('Text', cell, text=0)
        treeview.append_column(col)
        treeview.connect('row_collapsed', self.on_collapsed)

        treesel = treeview.get_selection()
        treesel.connect('changed', self.on_changed)

        for i in range(5):
            treeiter = treestore.append(None, ["Row %d" % i])
        for j in range(3):
            treestore.append(treeiter, ["Subrow (%d, %d)" % (i, j)])
        treestore.append(None, ["Row %d" % (i + 1)])

        self.window.add(treeview)
        self.window.show_all()

    def on_changed(self, treesel):
        model, treepaths = treesel.get_selected_rows()
        if treepaths:
            print "\nSelected row:", treepaths
        else:
            print "\nNo row selected"

    def on_collapsed(self, treeview, treeiter, treepath):
        print "Row", treepath, "collapsed"

    def run(self):
        gtk.main()

app = SelectChildTestApp()
app.run()
-- 
Jeffrey Barish