Kevin Ryde > Glib-Ex-ConnectProperties > Glib::Ex::ConnectProperties::Element::tree_selection

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Module Version: 19   Source  

NAME ^

Glib::Ex::ConnectProperties::Element::tree_selection -- TreeSelection rows

SYNOPSIS ^

 Glib::Ex::ConnectProperties->new([$treesel, 'tree-selection#width'],
                                  [$another, 'something']);

DESCRIPTION ^

This element class implements ConnectProperties access to rows selected in a Gtk2::TreeSelection.

    tree-selection#empty           boolean, read-only
    tree-selection#not-empty       boolean, read-only
    tree-selection#count           integer, read-only
    tree-selection#selected-path   Gtk2::TreePath or undef

A Gtk2::TreeSelection is normally used by Gtk2::TreeView. The target object for ConnectProperties should be the TreeSelection, as obtained from the TreeView with

    $treeselection = $treeview->get_selection();

For example tree-selection#not-empty might be connected up to make a delete button sensitive only when the user has selected one or more rows,

    my $treeselection = $treeview->get_selection;
    Glib::Ex::ConnectProperties->new
      ([$treeselection, 'tree-selection#not-empty'],
       [$button,        'sensitive', write_only => 1]);

tree-selection#selected-path is the first selected row. It's intended for use with "single" selection mode so there's at most one row selected. Writing to the property does select_path() and in single mode will switch from any existing selected row to just the new one. This could be used to synchronise the selected item in two TreeViews.

Rows in a Gtk2::TreeSelection and items in a Gtk2::IconView are similar but not quite the same and so are kept as separate tree-selection# and iconview-selection#.

For reference a selected-iter of type Gtk2::TreeIter might mostly work, but not sure about comparing on storing. Would prefer an equal() or compare() method on Gtk2::TreeIter rather than going via the model. (Perl-Gtk2's to_arrayref() access only suits Perl code models.)

SEE ALSO ^

Glib::Ex::ConnectProperties, Glib::Ex::ConnectProperties::Element::iconview_selection, Glib::Ex::ConnectProperties::Element::model_rows, Glib::Ex::ConnectProperties::Element::combobox_active, Gtk2::TreeSelection, Gtk2::TreeView, Gtk2::TreePath

HOME PAGE ^

http://user42.tuxfamily.org/glib-ex-connectproperties/index.html

LICENSE ^

Copyright 2010, 2011, 2012 Kevin Ryde

Glib-Ex-ConnectProperties is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Glib-Ex-ConnectProperties is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Glib-Ex-ConnectProperties. If not, see http://www.gnu.org/licenses/.

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