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Gtk2::SimpleList - A simple interface to Gtk2's complex MVC list widget
use Glib qw(TRUE FALSE);
use Gtk2 '-init';
use Gtk2::SimpleList;
my $slist = Gtk2::SimpleList->new (
'Text Field' => 'text',
'Markup Field' => 'markup',
'Int Field' => 'int',
'Double Field' => 'double',
'Bool Field' => 'bool',
'Scalar Field' => 'scalar',
'Pixbuf Field' => 'pixbuf',
);
@{$slist->{data}} = (
[ 'text', 1, 1.1, TRUE, $var, $pixbuf ],
[ 'text', 2, 2.2, FALSE, $var, $pixbuf ],
);
# (almost) anything you can do to an array you can do to
# $slist->{data} which is an array reference tied to the list model
push @{$slist->{data}}, [ 'text', 3, 3.3, TRUE, $var, $pixbuf ];
# mess with selections
$slist->get_selection->set_mode ('multiple');
$slist->get_selection->unselect_all;
$slist->select (1, 3, 5..9); # select rows by index
$slist->unselect (3, 8); # unselect rows by index
@sel = $slist->get_selected_indices;
# simple way to make text columns editable
$slist->set_column_editable ($col_num, TRUE);
# Gtk2::SimpleList derives from Gtk2::TreeView, so all methods
# on a treeview are available.
$slist->set_rules_hint (TRUE);
$slist->signal_connect (row_activated => sub {
my ($sl, $path, $column) = @_;
my $row_ref = $sl->get_row_data_from_path ($path);
# $row_ref is now an array ref to the double-clicked row's data.
});
# turn an existing TreeView into a SimpleList; useful for
# Glade-generated interfaces.
$simplelist = Gtk2::SimpleList->new_from_treeview (
$glade->get_widget ('treeview'),
'Text Field' => 'text',
'Int Field' => 'int',
'Double Field' => 'double',
);
SimpleList is a simple interface to the powerful but complex Gtk2::TreeView and Gtk2::ListStore combination, implementing using tied arrays to make thing simple and easy.
Gtk2 has a powerful, but complex MVC (Model, View, Controller) system used to implement list and tree widgets. Gtk2::SimpleList automates the complex setup work and allows you to treat the list model as a more natural list of lists structure.
After creating a new Gtk2::SimpleList object with the desired columns you may
set the list data with a simple Perl array assignment. Rows may be added or
deleted with all of the normal array operations. You can treat the data
member of the list simplelist object as an array reference, and manipulate the
list data with perl's normal array operators.
A mechanism has also been put into place allowing columns to be Perl scalars. The scalar is converted to text through Perl's normal mechanisms and then displayed in the list. This same mechanism can be expanded by defining arbitrary new column types before calling the new function.
Glib::Object
+--- Gtk2::Object
+--- Gtk2::Widget
+--- Gtk2::TreeView
+--- Gtk2::SimpleList
cname is the name of the column, what will be displayed in the list headers if
they are turned on. The parameter ctype is the type of the column, one of:
text normal text strings markup pango markup strings int integer values double double-precision floating point values bool boolean values, displayed as toggle-able checkboxes scalar a perl scalar, displayed as a text string by default pixbuf a Gtk2::Gdk::Pixbuf
or the name of a custom type you add with add_column_type.
These should be provided in pairs according to the desired columns for your
list.
Gtk2::SimpleList->new(), but turns an existing Gtk2::TreeView into
a Gtk2::SimpleList. This is intended mostly for use with stuff like Glade,
where the widget is created for you. This will create and attach a new model
and remove any existing columns from treeview. Returns treeview,
re-blessed as a Gtk2::SimpleList.
To set the selection mode, or to select all or none of the rows, use the normal
TreeView/TreeSelection stuff, e.g. $slist->get_selection and the TreeSelection
methods get_mode, set_mode, select_all, and unselect_all.
add_column_type) automatically have callbacks installed to update data
when cells are edited. With set_column_editable, you can enable the
in-place editing.
get_column_editable tells you if column index is currently editable.
The first parameter is the column type name, the list of six are examples. There are no restrictions on the names and you may even overwrite the existing ones should you choose to do so. The remaining parameters are the type definition consisting of key value pairs. There are three required: type, renderer, and attr. The type key determines what actual datatype will be stored in the underlying model representation; this is a package name, e.g. Glib::String, Glib::Int, Glib::Boolean, but in general if you want an arbitrary Perl data structure you will want to use 'Glib::Scalar'. The renderer key should hold the class name of the cell renderer to create for this column type; this may be any of Gtk2::CellRendererText, Gtk2::CellRendererToggle, Gtk2::CellRendererPixbuf, or some other, possibly custom, cell renderer class. The attr key is magical; it may be either a string, in which case it specifies the attribute which will be set from the specified column (e.g. 'text' for a text renderer, 'active' for a toggle renderer, etc), or it may be a reference to a subroutine which will be called each time the renderer needs to draw the data.
This function, described as a GtkTreeCellDataFunc in the API reference, will receive 5 parameters: $treecol, $cell, $model, $iter, $col_num (when SimpleList hooks up the function, it sets the column number to be passed as the user data). The data value for the particular cell in question is available via $model->get ($iter, $col_num); you can then do whatever it is you have to do to render the cell the way you want. Here are some examples:
# just displays the value in a scalar as
# Perl would convert it to a string
Gtk2::SimpleList->add_column_type( 'a_scalar',
type => 'Glib::Scalar',
renderer => 'Gtk2::CellRendererText',
attr => sub {
my ($treecol, $cell, $model, $iter, $col_num) = @_;
my $info = $model->get ($iter, $col_num);
$cell->set (text => $info);
}
);
# sums up the values in an array ref and displays
# that in a text renderer
Gtk2::SimpleList->add_column_type( 'sum_of_array',
type => 'Glib::Scalar',
renderer => 'Gtk2::CellRendererText',
attr => sub {
my ($treecol, $cell, $model, $iter, $col_num) = @_;
my $sum = 0;
my $info = $model->get ($iter, $col_num);
foreach (@$info)
{
$sum += $_;
}
$cell->set (text => $sum);
}
);
After creating a new Gtk2::SimpleList object there will be a member called data
which is a tied array. That means data may be treated as an array, but in
reality the data resides in something else. There is no need to understand the
details of this it just means that you put data into, take data out of, and
modify it just like any other array. This includes using array operations like
push, pop, unshift, and shift. For those of you very familiar with perl this
section will prove redundant, but just in case:
Adding and removing rows:
# push a row onto the end of the list
push @{$slist->{data}}, [col1_data, col2_data, ..., coln_data];
# pop a row off of the end of the list
$rowref = pop @{$slist->{data}};
# unshift a row onto the beginning of the list
unshift @{$slist->{data}}, [col1_data, col2_data, ..., coln_data];
# shift a row off of the beginning of the list
$rowref = shift @{$slist->{data}};
# delete the row at index $n, 0 indexed
splice @{ $slist->{data} }, $n, 1;
# set the entire list to be the data in a array
@{$slist->{data}} = ( [row1, ...], [row2, ...], [row3, ...] );
Getting at the data in the list:
# get an array reference to the entire nth row
$rowref = $slist->{data}[n];
# get the scalar in the mth column of the nth row, 0 indexed
$val = $slist->{data}[n][m];
# set an array reference to the entire nth row
$slist->{data}[n] = [col1_data, col2_data, ..., coln_data];
# get the scalar in the mth column of the nth row, 0 indexed
$slist->{data}[n][m] = $rowm_coln_value;
Perl(1), Glib(3pm), Gtk2(3pm), Gtk2::TreeView(3pm), Gtk2::TreeModel(3pm), Gtk2::ListStore(3pm).
Note: Gtk2::SimpleList is deprecated in favor of Gtk2::Ex::Simple::List, part of the Gtk2-Perl-Ex project at http://gtk2-perl-ex.sf.net .
muppet <scott at asofyet dot org> Ross McFarland <rwmcfa1 at neces dot com> Gavin Brown <gavin dot brown at uk dot com>
Copyright 2003-2004 by the Gtk2-Perl team.
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA.