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Problem Suppose you have set up a form and you want to prevent the user from submitting the form twice as shown below. There are two methods to accomplish this. This article shows the first method.
Solution
- In the first method, when the user clicks on the submit button the first time, we make that button inactive to prevent any further clicks.
- It might be obvious to some, but in case you're looking for the method that "turns off" a button, it's GtkWidget::set_sensitive(
false).
Sample Code 1
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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("Prevent a form from submitting twice\n".
"Part 1 - make the button inactive after first click");
$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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- Note that this is only 70% of the sample code. You have to be a registered member to see the entire sample code. Please login or register.
- Registration is free and immediate.
- Have some doubt about the registration? Please read this forum article.
Explanation The above example is based on How to align GtkEntry fields - Part 2?
What's new here:
- Turn off the button!
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