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Problem You have set up a combo box in a GtkTreeView in Part 1.
Now you would like to process the combo box when user selects from the list as shown below:
Solution
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 200);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Using GtkCellRendererCombo - Part 2\n".
" process ComboBox");
$title->modify_font(new PangoFontDescription("Times New Roman Italic 10"));
$title->modify_fg(Gtk::STATE_NORMAL, GdkColor::parse("#0000ff"));
$title->set_size_request(-1, 40);
$vbox->pack_start($title, 0, 0);
$vbox->pack_start(new GtkLabel(), 0, 0);
// the 2D table
$data = array(
array('row0', 'item 1', 2, 3.1),
array('row1', 'item 4', 5, 6.21),
array('row2', 'item 7', 8, 9.36),
array('row3', 'item 10', 11, 12.4),
array('row4', 'item 21', 14, 15.5),
array('row5', 'item 36', 17, 18.6),
array('row6', 'item 42', 20, 21.73));
display_table($vbox, $data);
$window->show_all();
Gtk::main();
function display_table($vbox, $data) {
// Set up a scroll window
$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC,
Gtk::POLICY_AUTOMATIC);
$vbox->pack_start($scrolled_win);
// Creates the list store
if (defined("GObject::TYPE_STRING")) {
$model = new GtkListStore(GObject::TYPE_STRING, GObject::TYPE_STRING,
GObject::TYPE_LONG, GObject::TYPE_DOUBLE, GObject::TYPE_STRING);
} else {
$model = new GtkListStore(Gtk::TYPE_STRING, Gtk::TYPE_STRING,
Gtk::TYPE_LONG, Gtk::TYPE_DOUBLE, Gtk::TYPE_STRING);
}
$field_header = array('Row #', 'Description', 'Qty', 'Price');
// Creates the view to display the list store
$view = new GtkTreeView($model);
$scrolled_win->add($view);
// Creates columns
for ($col=0; $col<count($field_header); ++$col) {
$cell_renderer = new GtkCellRendererText();
$column = new GtkTreeViewColumn($field_header[$col],
$cell_renderer, 'text', $col);
$view->append_column($column);
}
// set up the combobox
$cell_renderer = new GtkCellRendererCombo();
if (defined("GObject::TYPE_STRING")) {
$category = new GtkListStore(GObject::TYPE_STRING);
} else {
$category = new GtkListStore(Gtk::TYPE_STRING);
}
$list = array('grp 1', 'grp 2', 'grp 3', 'grp 4');
foreach($list as $choice) {
$category->append(array($choice));
}
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- Note that this is only 70% of the sample code. You have to be a registered member to see the entire sample code. Please login or register.
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Explanation
- When user selects something from the combo box, php-gtk will emit a signal GtkCellrenderertext::edited(). So we set up a event handler to handle this. Note that we pass
$model along with the event handler. This is the data model that is associated with the tree view. We need this so that we can store the value that has been selected by the user.
- Note that php-gtk actually gives you almost everything you need!
$path tells you which row it is. $selection is the value selected by the user. The last one, $model is the user-defined argument that we have passed along when setting up the event handler (see note 1).
- Get the iter from
$path using GtkTreemodel::get_iter(). An iter is just a pointer to a row in your data model.
- With the
$iter above, we can now set the value of the user selection in the data model with GtkListstore::set($iter, $column, $value). Note that if you don't set this back to the data model, the user selection will disappear once you move away and select another row.
Related Links
User reviews Average user ratings:  4.0 (from 4 users) Note: You have to be a registered member to leave a comment. Free registration here. |
April 02, 2007 10:58am
I'd like to know how to use this code in a class because I use the following method:
$cell_renderer->connect_simple("edited", array($this,"on_edit_done"), $treeview, $i);
Could you help me?
April 02, 2007 7:49pm
As requested, here's the example using OO appraoch:
http://www.kksou.com/php-gtk2/articles/use-GtkCellRendererCombo---Part-5---using-class.php
April 03, 2007 8:12am
Thanks a lot!!!!
September 17, 2008 10:38pm
What if I wish to display text in the dropdown, yet use indices for storage in the parent TreeModel? For example, a series of types, where they get translated to an integer, yet display text instead? I can only seem to get the text that was selected, but not the index that gets selected in the GtkCellRendererCombo, or any access at all to the selected iter from the CellRenderCombo's actual ComboBox?