Activating multiple rows in a TreeView

Desktop Ruby-Gnome 2
1

Hi,

When the ‘row-activated’ signal gets fired in a TreeView, either by
pressing
Enter or double-clicking, the selection gets reduced to the currently
focused
row, i.e. any other rows that were previously selected get deselected.

Is there some way to avoid this, so I can get the list of selected rows
in
the row-activated handler? PyGTK supports this directly by passing a
list
of selected rows to the handler, but it looks like in Ruby-GTK this
isn’t
possible for some reason.

Cheers,
Markus

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2

Hi,

In 20060929180244.GA5145@fnord
“[ruby-gnome2-devel-en] Activating multiple rows in a TreeView” on
Fri, 29 Sep 2006 20:02:44 +0200,
Markus K. [email protected] wrote:

Is there some way to avoid this, so I can get the list of selected rows in
the row-activated handler?

What about the following script:

#!/usr/bin/env ruby

require ‘gtk2’

window = Gtk::Window.new

model = Gtk::TreeStore.new(String)

tree_view = Gtk::TreeView.new
tree_view.model = model
tree_view.selection.mode = Gtk::SELECTION_MULTIPLE

prev_selected = []
selected = []
tree_view.selection.signal_connect(“changed”) do |selection|
prev_selected, selected = selected, selection.selected_rows
false
end
tree_view.signal_connect(“row-activated”) do |widget, path, column|
p prev_selected
false
end

cell = Gtk::CellRendererText.new
column = Gtk::TreeViewColumn.new(“column”, cell, “text” => 0)
tree_view.append_column(column)

10.times do |i|
iter = model.append(nil)
iter.set_value(0, i.to_s)
end

window.add(tree_view)
window.show_all

Gtk.main

                       PyGTK supports this directly by passing a list

of selected rows to the handler

Really? Could you show me a example for that?

Thanks,

kou

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3

Hi (sorry for the broken thread, I wasn’t subscribed to the list yet)

PyGTK supports this directly by passing a list of selected rows to the handler
Really? Could you show me a example for that?

You’re script does the trick, though it doesn’t work when
double-clicking, and it
doesn’t restore the selection afterwards. But after rewriting it in
Python I
realized that PyGTK has the same behaviour.

The reason I assumed PyGTK handles this is that I saw it in the code of
the
Python music player Quodlibet, but I just now realized that they use a
custom
TreeView which implements that behaviour (see the MultiDragTreeView in
http://www.sacredchao.net/quodlibet/browser/trunk/quodlibet/qltk/views.py).

So, I guess I’ll try to rebuild that class in ruby.
But thanks for your answer, anyway!

Here’s the python version of your script:

#!/usr/bin/env python

import gtk

window = gtk.Window()

model = gtk.TreeStore(str)

tree_view = gtk.TreeView(model)
tree_view.get_selection().set_mode(gtk.SELECTION_MULTIPLE)

prev_selected = []
selected = []
def changed(selection):
global prev_selected, selected
prev_selected = selected
model, selected = selection.get_selected_rows()
tree_view.get_selection().connect(“changed”, changed)
def row_activated(widget, path, column):
global prev_selected
print prev_selected
False
tree_view.connect(“row-activated”, row_activated)

cell = gtk.CellRendererText()
column = gtk.TreeViewColumn(“column”, cell)
column.add_attribute(cell, “text”, 0)
tree_view.append_column(column)

for i in range(0, 10):
model.append(None, row=[str(i)])

window.add(tree_view)
window.show_all()

gtk.main()

Cheers
Markus

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