Sample Code 42: How to display a popup alert for required fields - Part 2 - OK button centered? |
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Written by kksou
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Sunday, 01 October 2006 |
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Problem You have displayed a popup alert box in Part 1.
However, note that the OK button is right aligned. You would like the OK button to be centered as shown below:
Solution The OK button can be centered by changing the layout style of the dialog action area with GtkButtonBox::set_layout(Gtk::BUTTONBOX_SPREAD)
Sample Code 1
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 150);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Display Alert - Part 2");
$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);
$vbox->pack_start(new GtkLabel(), 0, 0); // add a small gap
// setup the entry field
$hbox = new GtkHBox();
$vbox->pack_start($hbox, 0, 0);
$hbox->pack_start(new GtkLabel("Please enter your name:"), 0, 0);
$name = new GtkEntry();
$hbox->pack_start($name, 0, 0);
$name->connect('activate', 'on_activate');
// check user input
function on_activate($widget) {
$input = $widget->get_text();
echo "name = $input\n";
if ($input=='') alert("Please enter your name!");
$widget->grab_focus();
}
// display popup alert box
function alert($msg) {
$dialog = new GtkDialog('Alert', null, Gtk::DIALOG_MODAL);
$dialog->set_position(Gtk::WIN_POS_CENTER_ALWAYS);
$top_area = $dialog->vbox;
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Explanation
User reviews Average user ratings:  4.0 (from 4 users) Note: You have to be a registered member to leave a comment. Free registration here. |
February 08, 2007 2:39pm
Would be nice to have here the set_default_response technique shown
February 15, 2007 2:01am
As requested, here's an example on set_default_response:
How to set default button of GtkDialog - Part 1 - using set_default_response?
April 02, 2007 12:06am
while taking this coding to run,there is only entry only appear,button is disappear...
August 24, 2008 5:02am
nice code