263. How to use GtkSheet - Part 16 - set font?

Problem

Suppose you would like to change the font of the text of a cell in a GtkSheet as shown below:

How to use GtkSheet - Part 16 - set font?


Solution

  • Make sure your version of PHP-GTK2 has the GtkExtra library, and the feature turned on in php.ini. (See notes below.)
  • By right, GtkSheet has a method called GtkSheet::range_set_font() that allows us to set the font of a range of cells easily. However, this method is not imported into php-gtk2 yet. (Pleas refer here for details.)
  • Assuming you have set up your GtkSheet for browsing only as described in How to use GtkSheet - Part 8 - alternate row colors?.
  • To change the font of a cell, we use the method GtkWidget::modify_font() to change the font of the label for each cell.

Important Note: This only works for PHP-GTK2 compliled with the additional library GtkExtra. For linux, you can download the files from http://gtkextra.sourceforge.net/ and do a recompile. For windows, you may use the builds by Elizabeth Smith or the official php-gtk2 beta release available at http://gtk.php.net/download.php. Both contain all the required gtkextra libraries and dll's. In the php.ini, don't forget to add php-gtk.extensions = php_gtk_extra2.dll to turn on GtkExtra.


Sample Code

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<?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(430, 250);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());

// display title
$title = new GtkLabel("Using GtkSheet\n".
"Part 16 - Set Font");
$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 10', 11, 12.4),
array('row4', 'item 7', 5, 15.5),
array('row5', 'item 4', 17, 18.6),
array('row6', 'item 3', 20, 21.73));

$max_col = count($data[0])-1;
$max_row = count($data)-1;

$field_header = array('Row #', 'Description', 'Qty', 'Price');
$justification = array('LEFT', 'LEFT', 'CENTER', 'RIGHT');
$column_width = array(63, 150, 40, 60);

display_table($vbox, $data, $field_header, $justification, $column_width);

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

function display_table($vbox, $data, $field_header, $justification, $column_width) {

    $scrolled_win = new GtkScrolledWindow();
    $scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC,
        Gtk::POLICY_AUTOMATIC);
    $vbox->pack_start($scrolled_win);

    $sheet = GtkSheet::new_browser(count($data), count($data[0]), 'Test 123');
    $sheet->set_autoresize(1);
    $scrolled_win->add($sheet);

    $sheet->connect('key-press-event', 'on_keypress');

    // set column header
    for ($col=0; $col<count($field_header); ++$col) {
        $sheet->column_button_add_label($col, $field_header[$col]);
        $justify = constant("Gtk::JUSTIFY_".$justification[$col]);
        $sheet->column_button_justify($col, $justify);
        $sheet->set_column_width($col, $column_width[$col]);
    }

    global $eventbox;
    $alignment_val = array('LEFT'=>0.0, 'CENTER'=>0.5, 'RIGHT'=>1.0);
    for ($row=0; $row<count($data); ++$row) {
        $sheet->row_button_add_label($row, $row+1);
        for ($col=0; $col<count($data[$row]); ++$col) {
            $eventbox[$row][$col] = new GtkEventBox();
            $alignment = new GtkAlignment(
                $alignment_val[$justification[$col]], 0.5, 0, 0);
            $alignment->set_padding(0, 0, 2, 2);
            $label = new GtkLabel($data[$row][$col]); // note 1
            $label->modify_font(new PangoFontDescription( 
                "Times New Roman Italic 10")); // note 2
            $alignment->add($label);
            $eventbox[$row][$col]->add($alignment);
            $row_color = ($row%2==1) ? '#dddddd' : '#ffffff';
            $eventbox[$row][$col]->modify_bg(Gtk::STATE_NORMAL,
                GdkColor::parse($row_color));
            $eventbox[$row][$col]->set_size_request($column_width[$col], -1);
            $sheet->attach_default($eventbox[$row][$col], $row, $col);
        }
    }
}

function on_keypress($sheet, $event) {
    global $max_col, $max_row;
    list($row, $col) = $sheet->get_active_cell();
    if ($event->keyval == Gdk::KEY_Tab) {
        if ($col<$max_col || $row==$max_row) return false;
        $sheet->set_active_cell($row+1, 0);
        return true;
    } else {
        return false;
    }
}

?>

Output

As shown above.
 

Explanation

The example above is based on How to use GtkSheet - Part 8 - alternate row colors?

What's new here:

  1. Create the label.
  2. Set the font.

Note

As I've mentioned in the blog, there's some problem with this method.

Try pressing the Tab key. Did you see the underlying GtkItemEntry?

I'm not sure if this is a feature or a bug. Although I could find some ways to "gobble" up the Tab or arrow keys so that the GtkItemEntry doesn't appear, I know this should not be the right way of doing things.

Anybody knows how to "deactivate" the underlying GtkItemEntry?

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