468. How to setup GtkEntryCompletion with match selected signal - Part 1?

Problem

This is in response to Zach's post titled "GtkEntryCompletion to autofill multiple fields".

He has set up a GtkEntryCompletion similar to the following:

When the user has selected a state code, say "AZ", without pressing any other key or button, he would like some GtkEntry fields to be immediately populated with relevant data. In this example, I populate another GtkEntry field with the corresponding state name "Arizona" as shown below:

How to setup GtkEntryCompletion with match selected signal - Part 1?


Solution

  • We make use of the signal match-selected which is emitted when a string is selected from a GtkEntryCompletion.

Sample Code

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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 process GtkEntryCompletion\n".
"Part 2 - use of the 'match-selected' signal");
$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('AL'=>"Alabama",
        'AK'=>"Alaska",
        'AZ'=>"Arizona",
        'AR'=>"Arkansas",
        'CA'=>"California",
        'CO'=>"Colorado",
        'CT'=>"Connecticut",
        'DE'=>"Delaware",
        'DC'=>"District Of Columbia",
        'FL'=>"Florida",
        'GA'=>"Georgia",
        'HI'=>"Hawaii",
        'ID'=>"Idaho",
        'IL'=>"Illinois",
        'IN'=>"Indiana",
        'IA'=>"Iowa",
        'KS'=>"Kansas",
        'KY'=>"Kentucky",
        'LA'=>"Louisiana",
        'ME'=>"Maine",
        'MD'=>"Maryland",
        'MA'=>"Massachusetts",
        'MI'=>"Michigan",
        'MN'=>"Minnesota",
        'MS'=>"Mississippi",
        'MO'=>"Missouri",
        'MT'=>"Montana",
        'NE'=>"Nebraska",
        'NV'=>"Nevada",
        'NH'=>"New Hampshire",
        'NJ'=>"New Jersey",
        'NM'=>"New Mexico",
        'NY'=>"New York",
        'NC'=>"North Carolina",
        'ND'=>"North Dakota",
        'OH'=>"Ohio",
        'OK'=>"Oklahoma",
        'OR'=>"Oregon",
        'PA'=>"Pennsylvania",
        'RI'=>"Rhode Island",
        'SC'=>"South Carolina",
        'SD'=>"South Dakota",
        'TN'=>"Tennessee",
        'TX'=>"Texas",
        'UT'=>"Utah",
        'VT'=>"Vermont",
        'VA'=>"Virginia",
        'WA'=>"Washington",
        'WV'=>"West Virginia",
        'WI'=>"Wisconsin",
        'WY'=>"Wyoming");

$vbox->pack_start($hbox=new GtkHBox(), 0);
$hbox->pack_start(new GtkLabel('Select State Code: '), 0);

// setup GtkEntryCompletion
if (defined("GObject::TYPE_STRING")) {
    $model = new GtkListStore(GObject::TYPE_STRING, GObject::TYPE_STRING);
} else {
    $model = new GtkListStore(Gtk::TYPE_STRING, Gtk::TYPE_STRING);
}
$completion = new GtkEntryCompletion;
$completion->set_model($model);
$completion->set_text_column(0);
$entry = new GtkEntry();
$entry->set_completion($completion);
$hbox->pack_start($entry, 0);

$completion->connect('match-selected', 'on_match_selected');  // note 1

// Stuff the choices in the model
foreach($list as $state_code => $state_name) {
    $model->append(array($state_code, $state_name));
}

$vbox->pack_start(new GtkLabel(), 0);
$vbox->pack_start($hbox2=new GtkHBox(), 0);
$hbox2->pack_start(new GtkLabel('Selected State Name: '), 0);
$entry2 = new GtkEntry();
$hbox2->pack_start($entry2, 0);
$entry2->set_sensitive(false);

$window->show_all();
Gtk::main();

function on_match_selected($widget, $model, $iter) {
    $state_code = $model->get_value($iter, 0);
    $state_name = $model->get_value($iter, 1); // note 2
    global $entry2;
    $entry2->set_text("$state_name ($state_code)"); // note 3
}


?>

Output

As shown above.
 

Explanation

We make use of the code from How to setup GtkEntry with auto completion?

What's new:

  1. Register for the signal 'match-selected'.
  2. Get the state name.
  3. Populate the state name in $entry2.

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