Sample Code 213: How to make a button clickable but not activable by keyboard?
Written by kksou   
Monday, 09 April 2007
Problem

Suppose for one reason or another, you need to make a button clickable but not activable by keyboard, i.e. button does not receive focus but remains clickable as shown below:

How to make a button clickable but not activable by keyboard?


Solution

Maybe this is another item that is yet to be documented. Anyway, just add the following one-liner to make the button clickable but does not receive focus.

$button->set_property('can-focus', false);
Sample Code
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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("Make a button clickable but not activable by keyboard\n".
"(i.e. button does not receive focus but remains clickable)");
$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);

$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, $row+1);
        ++$row;
    }
}

// create a submit button
$button = new GtkButton('Submit');
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Explanation
  1. The above example is exactly the same as the example How to align GtkEntry fields - Part 2?, with the additional of only this one line.

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