Sample Code 523: How to extend GtkSpinButton? |
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Written by kksou
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Wednesday, 08 October 2008 |
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Problem This is in response to Peter's post titled "extending GtkSpinButton".
He would like to extend the GtkSpinButton class as shown below:
Solution
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$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(400, 120);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("extending GtkSpinButton");
$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, 0.5, 0, 0);
$alignment->add($title);
$vbox->pack_start($alignment, 0);
$vbox->pack_start(new GtkLabel(), 0);
$vbox->pack_start($hbox = new GtkHBox(), 0);
$hbox->pack_start(new GtkLabel('Please select a value: '), 0);
$spin_button = new mySpinButton(10, 20, 2); // note 1
$spin_button->set_editable(0); // note 2
$hbox->pack_start($spin_button, 0);
$window->show_all();
Gtk::main();
class mySpinButton extends GtkSpinButton { // note 3
function __construct($min=0, $max=0, $step_incr=0) {
parent::__construct();
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Explanation
- Create a new instance of your mySpinButton class.
- Set the entry field to be non-editable.
- Definition of the mySpinButton class.
- Create a new GtkAdjustment.
- Bind it to the GtkSpinButton.
- Set the initial value.
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User reviews Average user ratings:  5.0 (from 1 user) Note: You have to be a registered member to leave a comment. Free registration here. |
October 08, 2008 4:24am
A very quick response - and with example code. I tried for hours to figure it out.