Sample Code 25: How to setup and process GtkComboBoxEntry - Part 1? |
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Written by kksou
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Tuesday, 19 September 2006 |
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Problem You want to set up an editable pulldown menu (called GtkComboBoxEntry in PHP-GTK2) as shown below. Note that the main difference between a GtkComboBox and GtkComboBoxEntry is that GtkComboBoxEntry allow users to enter values that not present in the selection list. The user can choose and modify existing value, or enter a completely new one.
Solution
- An editable pulldown menu is created in php-gtk2 using GtkComboBoxEntry
- Although the name is longer, setting this up is surprisingly much simpler than setting up a GtkComboBox
- Unlike GtkComboBox, the selection of GtkComboBoxEntry is read more easily like a standard GtkEntry with get_text
Sample Code 1
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| <?php
$window = new GtkWindow();
$window->connect_simple('destroy', array( 'Gtk', 'main_quit'));
$window->set_size_request(400,150);
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Setup and read value from ComboBoxEntry");
$title->modify_font(new PangoFontDescription("Times New Roman Italic 10"));
$title->modify_fg(Gtk::STATE_NORMAL, GdkColor::parse("#0000ff"));
$title->set_size_request(-1, 60);
$vbox->pack_start($title, 0, 0);
// the selection
$list = array('item 1', 'item 2', 'item 3', 'item 4');
$vbox->pack_start($hbox=new GtkHBox(), 0, 0);
$hbox->pack_start(new GtkLabel('Select: '), 0, 0);
// Create a new comboboxentry and populates it
$combobox = &GtkComboBoxEntry::new_text();
foreach($list as $choice) {
$combobox->append_text($choice);
}
$combobox->get_child()->set_text(''); // note 1
$hbox->pack_start($combobox, 0, 0);
// Set up the submit butotn
$hbox->pack_start($button = new GtkLabel(' '), 0, 0);
$hbox->pack_start($button = new GtkButton('Submit'), 0, 0);
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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.
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Explanation
- This sets the default text of the comboboxentry. Here it's set to ''. You can of course set it to one of the selections, e.g. 'Item 1'.
- Note that we pass
$combobox along so that we can have access to this when the user clicks the submit button.
- Note that
$combobox is a GtkEntry by nature. So we read its value using get_text
$combobox->get_child()->get_text();
Notes
You may want to take a look at How to setup and process GtkComboBox? to compare the difference between GtkComboBox and GtkComboBoxEntry.
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