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by kksou
Sample Code 49: How to display a popup dialog to prompt for data? |
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Written by kksou
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Friday, 06 October 2006 |
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Problem You would like to display a popup dialog to prompt for data (similar to javascript command prompt()) as shown below:
Solution
- The prompt is displayed using a standard GtkDialog.
- We wrap the above into in a class for cleaner code reuse.
- We also created the function
prompt() so that one can call up a prompt dialog with a one-liner: $input=prompt($msg).
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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("Display a popup dialog to prompt for data");
$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 initial 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 combobox
$combobox = new GtkComboBox();
// Create a model
if (defined("GObject::TYPE_STRING")) {
$model = new GtkListStore(GObject::TYPE_STRING);
} else {
$model = new GtkListStore(Gtk::TYPE_STRING);
}
// Set up the combobox
$combobox->set_model($model);
$cellRenderer = new GtkCellRendererText();
$combobox->pack_start($cellRenderer);
$combobox->set_attributes($cellRenderer, 'text', 0);
$combobox->connect('changed', 'on_change'); // let us know when user selects an item
// Stuff the choices in the model
foreach($list as $choice) {
$model->append(array($choice));
}
// Set up a hbox to contain the combobox as well as the Add button
$hbox->pack_start($combobox, 0, 0);
$hbox->pack_start(new GtkLabel(' '), 0, 0);
$hbox->pack_start($button = new GtkButton('Add'), 0, 0);
$button->set_size_request(60, 24);
$button->connect('clicked', "on_button", $combobox);
function on_button($button, $combobox) { // process button click
$model = $combobox->get_model();
$button_label = $button->child->get_text();
$new_option = prompt("Please enter new option:");
if ($new_option!='') $model->append(array($new_option));
}
function on_change($combobox) { // process user selection
$model = $combobox->get_model();
$selection = $model->get_value($combobox->get_active_iter(), 0);
echo "You have selected: $selection!\n";
}
//function to prompt for user data
function prompt($str) {
$prompt = new Prompt($str); // creates a new prompt
$input = $prompt->entry->get_text(); // get the user input
return $input; // and returns the user input
}
class Prompt{
var $entry; // the user input
function Prompt($str) {
$dialog = new GtkDialog('Prompt', null, Gtk::DIALOG_MODAL);
$dialog->set_position(Gtk::WIN_POS_CENTER_ALWAYS);
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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
- For more explanation on the setting up of combobox, please refer to How to setup and process GtkComboBox?
- For more explanation on simulating button click when user press Enter, please refer to How to set a button as default action when user press Enter?
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