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Problem Dysmas sent me this interesting and very useful sample code that allows you to have a popup textview for editing of long text.
For example, you have set up a form that prompts the user for feedback as shown below.
If the user wants to enter a lot of text in the comments field (e.g. he would like to attach some sample codes), he can double click in the comments field which will popup a bigger textview for him to enter.
By default, a double click in a textview will select and highlight a word. You might want to see from this example how to intercept the double-click to popup the textview in a dialog box.
Solution
- We make use of the technique from How to align GtkEntry fields - Part 2? to display the form.
- By default, a double click in a textview will select and highlight a word. In addition to using button-press-event to intercept the double-click, you also need to use the method
emit_stop_by_name('button-press-event') to stop the default actions.
Important Note: This only works for PHP-GTK2 compliled with gtk+ v2.10 and above. If you are using an older version, for linux, you may follow the step-by-step instructions to recompile php-gtk2 with gtk+ v2.10. For windows, please refer to How to install php gtk2 on windows? You may also want to take a look here to see some of the new exciting PHP-GTK2 Functionalities.
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| <?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(400, 280);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Have a popup textview for editing of long text");
$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);
$fields = array('Name', 'Email', 'Comments');
$field_size = array(240, 120, 0);
$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, 0, 0, 0);
$alignment->add($label);
$table->attach($alignment, 0, 1, $row, $row+1);
if ($field=='Comments') {
$buffer = new GtkTextBuffer();
global $view;
$view = new GtkTextView();
$view->set_buffer($buffer);
$view->set_wrap_mode(Gtk::WRAP_WORD);
$view->set_size_request(280, 80);
$view->connect('button-press-event', 'on_view_button_press'); // note 1
$entry[$row] = new GtkVBox();
$entry[$row]->pack_start($view, 0);
$entry[$row]->pack_start(
new GtkLabel('Double-click for bigger text-edit window'));
} else {
$entry[$row] = new GtkEntry();
$entry[$row]->set_size_request($field_size[$row], -1);
}
$alignment = new GtkAlignment(0, 0, 0, 0);
$alignment->add($entry[$row]);
$table->attach($alignment, 1, 2, $row, $row+1);
++$row;
}
}
// create a submit button
$button = new GtkButton('Submit');
$button->set_size_request(60, 28);
$button->connect('clicked', 'on_click');
$row = count($fields);
$alignment = new GtkAlignment(0, 0.5, 0, 0);
$alignment->add($button);
$table->attach($alignment, 1, 2, $row, $row+1);
$window->show_all();
Gtk::main();
function on_click($button) {
global $fields, $entry;
$i=0;
foreach($fields as $field) {
if ($field=='Comments') {
global $view;
$buffer = $view->get_buffer();
$input = $buffer->get_text($buffer->get_start_iter(),
$buffer->get_end_iter());
} else {
$input = $entry[$i]->get_text();
}
echo "$field: $input\n";
++$i;
}
}
function on_view_button_press($widget, $event) {
if ($event->type==Gdk::_2BUTTON_PRESS) {
print "bp201. double-click!\n";
$zoom = new zoom($widget); // note 2
$widget->emit_stop_by_name('button-press-event'); // note 3
return true;
} else {
return false;
}
}
function zoom($widget) {
$zoom = new zoom($widget);
}
class zoom{
var $entry;
var $ok=0;
var $buff;
function zoom($view) {
$dialog = new GtkDialog('Zoom', null,
Gtk::DIALOG_MODAL|Gtk::DIALOG_NO_SEPARATOR);
$dialog->set_size_request(400, 300);
// $label = new GtkLabel($label: ");
// $dialog->vbox->pack_start($label);
$scrolled_win = new GtkScrolledWindow();
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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
- Intercept the double-click.
- Popup the textview in a dialog box.
- Stop any default actions.
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