Sample Code 318: How to create a php gtk browser using gtkhtml - Part 2 - click on links? |
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Written by kksou
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Sunday, 02 September 2007 |
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Problem Part 2 of this series extends Part 1 to allow user to follow links in the browser as shown below:
Solution
- We use the signal 'link-clicked' to be notified when the user clicks on a link in the browser.
- In the signal handler, we first put a copy of the url in GtkEntry, manually simulate a click on the 'Go' button. This will then load the content of the url in the browser.
Important Note:
- This only works for PHP-GTK2 compliled with the additional library GtkHTML.
- For linux, you have to recompile php-gtk2 to include this library.
- For windows, you may refer to the article How to install PHP-GTK2 on windows. The latest beta release from official php-gtk2 website comes complete with GtkHTML.
- In the
php.ini, don't forget to add php-gtk.extensions = php_gtk_html2.dll to turn on GtkHTML.
- Lastly, the most "tricky" part in running GtkHTML is that to run this script, you have to use gconfd-2 | php script.php. If you have installed the beta release of PHP-GTK2 on windows as outlined in this article, you will find the program gconfd-2.exe in the root directory of php-gtk.
- In the event that you cannot get this sample code to work, I would suggest that you try to do a fresh install of the beta-release of PHP-GTK2 (details here). It should work out-of-the-box (just need to add
php-gtk.extensions = php_gtk_html2.dll in php.ini as explained above). Note that you can still keep your original copy of php-gtk2 while having this new version.
- You will most likely see the warning
(php.exe:5348): Gdk-WARNING **: gdkselection-win32.c:1068: OpenClipboard failed: Invalid window handle.. Not really sure how to fix this yet. The script seems to run ok, though.
Sample Code 1
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| <?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(400, 250);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
$hbox = new GtkHBox();
$vbox->pack_start($hbox, 0);
$hbox->pack_start(new GtkLabel('URL: '), 0);
$hbox->pack_start($url_entry = new GtkEntry('http://gtk.php.net/'));
$hbox->pack_start($go_button = new GtkButton('Go'), 0);
$go_button->set_size_request(32, -1);
$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC,Gtk::POLICY_AUTOMATIC);
$vbox->pack_start($scrolled_win);
$gtkhtml = new GtkHTML();
$scrolled_win->add($gtkhtml);
$gtkhtml->connect('url-requested', 'on_url_requested');
$gtkhtml->connect('link-clicked', 'on_link_clicked'); // note 1
$url_entry->connect('activate', 'on_url_entry_activate', $go_button);
$go_button->connect('clicked', 'on_go_button', $url_entry, $gtkhtml);
$go_button->clicked();
$window->show_all();
Gtk::main();
function on_url_entry_activate($entry, $go_button) {
$go_button->clicked();
}
function on_go_button($button, $url_entry, $gtkhtml) {
$url = $url_entry->get_text();
$html_text = file_get_contents($url);
$gtkhtml->set_base($url);
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Explanation The above code is extended from the code in How to create a php gtk browser using gtkhtml - Part 1?
What's new here:
- Notify us when user clicks on links.
- Set the text of GtkEntry.
- Display the contents of the url.
Related Links
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