212. How to use GtkCellRendererCombo - Part 5 - using class?

Problem


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This is in response to Anderson Belgamo's request to have the example in the article How to use GtkCellRendererCombo - Part 3 - process user selection? using classes as shown below:


Notice: Undefined variable: ebook in /var/www/kksou.com/public_html/php-gtk2/plugins/content/DirectPHP/DirectPHP.php(56) : eval()'d code on line 1

How to use GtkCellRendererCombo - Part 5 - using class?


Solution


Sample Code

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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 5\nusing class");
$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);
$title->set_justify(Gtk::JUSTIFY_CENTER);
$alignment = new GtkAlignment(0.5, 0, 0, 0);
$alignment->add($title);
$vbox->pack_start($alignment, 0, 0);
$vbox->pack_start(new GtkLabel(), 0, 0);

// the 2D table
$data = array(
array('row0', 'item 42', 2, 3.1),
array('row1', 'item 36', 20, 6.21),
array('row2', 'item 21', 8, 9.36),
array('row3', 'item 12', 11, 12.4),
array('row4', 'item 7', 5, 15.5),
array('row5', 'item 4', 17, 18.6),
array('row6', 'item 3', 20, 21.73));

$treeview = new Treeview_Combo($vbox, $data);

$window->show_all();
Gtk::main();

class Treeview_Combo extends GtkTreeView {

    public function __construct($container, $data) {
        parent::__construct();

        // Set up a scroll window
        $scrolled_win = new GtkScrolledWindow();
        $scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC,
        Gtk::POLICY_AUTOMATIC);
        $container->pack_start($scrolled_win);
        $scrolled_win->add($this);

        // 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('id', 'Description', 'Qty', 'Price');
        $field_justification = array(0.0, 0.0, 0.5, 1.0);

        // Creates the view to display the list store
        $this->set_model($model);

        // Creates the columns
        for ($col=0; $col<count($field_header); ++$col) {
            $cell_renderer = new GtkCellRendererText();
            $cell_renderer->set_property("xalign", $field_justification[$col]);
            $column = new GtkTreeViewColumn($field_header[$col],
            $cell_renderer, 'text', $col);
            $column->set_alignment($field_justification[$col]);
            $column->set_sort_column_id($col);

            // setup self-defined function to display alternate row color
            $column->set_cell_data_func($cell_renderer,
                array(&$this, "format_col"), $col);
            $this->append_column($column);
        }

        // setup combo box
        $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));
        }
        $cell_renderer->set_property('model', $category);
        $cell_renderer->set_property('text-column', 0);
        $cell_renderer->set_property('editable', true);
        $cell_renderer->connect('edited', array(&$this, 'on_combo'), $model);

        $column = new GtkTreeViewColumn('Category', $cell_renderer, 'text', 4);
        $column->set_cell_data_func($cell_renderer,
            array(&$this, "format_col"), 4);
        $this->append_column($column);

        // pupulates the data
        for ($row=0; $row<count($data); ++$row) {
            $values = array();
            for ($col=0; $col<count($data[$row]); ++$col) {
                $values[] = $data[$row][$col];
            }
            $values[] = '';
            $model->append($values);
        }

        $selection = $this->get_selection();
        $selection->connect('changed', array($this, 'on_selection'));
    }

    function format_col($column, $cell, $model, $iter, $col_num) {
        $path = $model->get_path($iter);
        $row_num = $path[0];
        $row_color = ($row_num%2==1) ? '#dddddd' : '#ffffff';
        $cell->set_property('cell-background', $row_color);
    }

    function on_combo($renderer, $path, $selection, $model) {
        $iter = $model->get_iter($path);
        $model->set($iter, 4, $selection);
    }

    function on_selection($selection) {
        list($model, $iter) = $selection->get_selected();
        $desc = $model->get_value($iter, 1);
        $qty = $model->get_value($iter, 2);
        $price = $model->get_value($iter, 3);
        $grp = $model->get_value($iter, 4);
        echo "You have selected $desc: $qty ($price) category = $grp\n";
    }

}

?>

Output

As shown above.

 

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