|
Problem You want to allow users to insert links in a GtkTextView. The user will highlight some text and press the "Insert Link" button. A popup dialog box will appear where the user enters the URL address. On pressing return, the URL address will be registered, and the link highlighted in the standard blue underlined text.
In Part 1, we have the link displayed. In this article, we will launch the link in the default browser when the user clicks on the link in the textview as shown below:
Solution
Sample Code 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
| <?php
$window = new GtkWindow();
$window->set_size_request(400, 240);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Insert Links in GtkTextView - Part 2\n".
"Click on the link.\n".
"The link will be opened in your default browser.");
$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);
$title->set_justify(Gtk::JUSTIFY_CENTER);
$alignment = new GtkAlignment(0.5, 0.5, 0, 0);
$alignment->add($title);
$vbox->pack_start($alignment);
// Setup TextBuffer and TextView
$tag_count = 0;
$buffer = new GtkTextBuffer();
$buffer->set_text('PHP-GTK2 resources:
1) manual: http://gtk.php.net/manual/en/gtkclasses.php
2) mailing list: http://www.nabble.com/Php---GTK---General-f171.html
');
$view = new GtkTextView();
$view->set_buffer($buffer);
$view->modify_font(new PangoFontDescription("Arial 10"));
$view->set_wrap_mode(Gtk::WRAP_WORD);
$buffer->connect('mark-set', 'on_mark_set'); // note 1
$hbox = new GtkHBox();
$hbox->pack_start($button = new GtkButton('Insert Link'), 0);
$vbox->pack_start($hbox, 0);
$button->connect('clicked', 'on_button', $buffer);
$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
$vbox->pack_start($scrolled_win);
$scrolled_win->add($view);
$window->show_all();
Gtk::main();
// Setup highlight tag
class LinkTag extends GtkTextTag {
function __construct($link) {
global $buffer;
parent::__construct();
$tag_table = $buffer->get_tag_table();
$this->set_property('foreground', "#0000ff");
$this->set_property('underline', Pango::UNDERLINE_SINGLE);
$tag_table->add($this);
}
}
function on_button($button, $buffer) {
global $view, $tag, $url, $tag_count;
$cursor_pos = $buffer->get_mark('insert');
$iter = $buffer->get_iter_at_mark($cursor_pos);
list($start, $end) = $buffer->get_selection_bounds();
if ($start==null || $end==null) return; // no selection
$url[$tag_count] = prompt("Enter URL:");
$tag[$tag_count] = new LinkTag($url[$tag_count]);
$buffer->apply_tag($tag[$tag_count], $start, $end);
++$tag_count;
$buffer->place_cursor($end);
$view->grab_focus();
}
function on_mark_set($buffer, $textiter, $textmark) {
global $tag, $url, $tag_count;
if ($textmark->get_name()!='insert') return;
$cursor_pos = $buffer->get_insert(); // note 2
$iter = $buffer->get_iter_at_mark($cursor_pos); // note 2
for ($i=0; $i<$tag_count; ++$i) {
if ($iter->has_tag($tag[$i])) { // note 3
if (PHP_SHLIB_SUFFIX=='dll') {
$shell = new COM('WScript.Shell'); // note 4
$shell->Run('cmd /c start "" "' . $url[$i] . '"', 0, FALSE); // note 4
unset($shell); // note 4
} else {
exec("firefox $url[$i] > /dev/null &"); // note 5
}
} else {
}
}
return true;
}
//function to prompt for user data
|
- 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 We make use of the code in Part 1.
We also make use of the code in How to launch external app in winxp without the flashing of cmd window? to launch the url in external for windows platform.
What's new here:
- Connect the
mark-set signal.
- Get the current cursor position.
- Check if there's any tag at the current cursor position.
- If there is, launch the url in the default browser for windows platform.
- For linux users, please replace this with your favorite browser.
Note
In the next article, we will show you how to display the url address in the status bar when the mouse hovers over the link.
Related Links
User reviews There are no user reviews yet. Note: You have to be a registered member to leave a comment. Free registration here. |
