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Problem This article achieves the same objective as Part 1, that is, using Enter to move to next field.
In this Part 3, we use the method GtkWidget::child_focus() to simulate a tab keypress as shown below:
Solution
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 240);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Use Enter to Move to Next Field - Part 3\n".
"child_focus(Gtk::DIR_TAB_FORWARD)");
$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);
$fields = array('Item number', 'Item Description', 'Unit price', 'Quantity');
$field_size = array(120, 200, 80, 80);
$entry = array(); // to store the text entries
$table = new GtkTable();
display_table($table, $fields, $field_size); // display the table
$vbox->pack_start($table);
function display_table($table, $fields, $field_size) {
global $entry;
$row = 0;
foreach ($fields as $field) {
$label = new GtkLabel(" $field: ");
$alignment = new GtkAlignment(1, .5, 0, 0);
$alignment->add($label);
$table->attach($alignment, 0, 1, $row, $row+1,
Gtk::FILL, Gtk::SHRINK, 0, 0);
$entry[$row] = new GtkEntry();
$alignment = new GtkAlignment(0, .5, 0, 0);
$alignment->add($entry[$row]);
$entry[$row]->set_size_request($field_size[$row], -1);
$table->attach($alignment, 1, 2, $row, $row+1);
$entry[$row]->connect('key-press-event', 'on_keypress', $row);
++$row;
}
}
// create a submit button
$button = new GtkButton('Submit');
$button->set_size_request(60, 28);
$button->connect('clicked', 'on_click');
$row = count($fields);
$alignment = new GtkAlignment(0, 0.5, 0, 0);
$alignment->add($button);
$table->attach($alignment, 1, 2, $row, $row+1);
$window->show_all();
Gtk::main();
function on_click($button) {
global $fields, $entry;
$i=0;
foreach($fields as $field) {
echo "$field: ".$entry[$i]->get_text()."\n";
++$i;
}
}
function on_keypress($widget, $event, $row) {
global $entry, $button;
if ($event->keyval!=Gdk::KEY_Return) return false;
// use if ($event->keyval!=65293) if your version of php-gtk2
// does not have Gdk::KEY_Return defined
$next_row = ++$row;
if ($next_row<count($entry)) {
$widget->get_toplevel()->child_focus(Gtk::DIR_TAB_FORWARD); // note 1
} else {
$button->grab_focus();
$button->clicked();
}
}
?> |
Explanation We make use of the code from How to have Enter move to next field in form - Part 1?
What's new here:
- Simulate a tab keypress.
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