Hi,
I need to dynamically modify TreeViews, e.g. to determine which
attributes are set in the GtkBuilder-file, and to show a different
model-column in a view-column. But I don't know how:
When I create GtkTreeViewColumns and GtkCellRenderers, I can
set "attributes", to tell the renderer which data to display,
e.g. (in Python, see end-of-mail for complete example):
store = Gtk.ListStore(str, str, int)
tree = Gtk.Treeview(store)
renderer = Gtk.CellRendererText()
column = Gtk.TreeViewColumn("Test", renderer, text=0, weight=2)
tree.append_column(column)
The attributes here are "text=0" and "weight=2"
Now:
- How can I determine which attributes are set? I would like
something like:
>>> attrs = column.get_attributes(renderer)
>>> print(attrs)
{"text": 0, "weight": 2}
- How can I retrieve the attributes back from the tree/column/renderer?
I would like something like:
>>> textattr = column.get_attribute(renderer, "text")
>>> print(textattr)
0
- How can I modify a single attribute without clearing the others?
I would like something like:
>>> column.add_attribute(renderer, "text", 1)
But this fails since the "text"-attribute is already set.
thanks,
Roland
PS: Complete example:
#!/usr/bin/python
from gi.repository import Gtk
# create window
win = Gtk.Window()
win.connect("delete-event", Gtk.main_quit)
# create treestore
store = Gtk.ListStore(str, str, int, int)
store.append(["Text", "Other text", 400, 1000])
store.append(["Text2", "Other text2", 1000, 400])
# create treeview
tree = Gtk.TreeView(store)
renderer = Gtk.CellRendererText()
column = Gtk.TreeViewColumn("Test", renderer, text=0, weight=2)
tree.append_column(column)
# TODO: get attribute-list
#attrs = column.get_attributes()
#print(attrs)
# -> {"text": 0, "weight": 2}
# TODO: get attribute
#textattr = column.get_attributes("text")
#print(textattr)
# -> 0
# TODO: modify attributes
column.add_attribute(renderer, "text", 1)
# fails with "...Cannot connect attribute `text' for cell renderer class
`GtkCellRendererText' since `text' is already attributed to column 0"
# run
win.add(tree)
win.show_all()
Gtk.main()
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