Sample Code 84: How to apply styles to GtkTextView using GtkTextTag - Part 1? |
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Written by kksou
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Friday, 03 November 2006 |
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Problem You want to apply styles to GtkTextView / GtkTextBuffer (e.g. bold, italic, underline, font color and highlight) as shown below:
Solution
Sample Code 1
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 240);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// define menu definition
$toolbar_definition = array('Bold', 'Italic', 'Underline', '<hr>',
'Blue', '<hr>', 'Highlight');
setup_toolbar($vbox, $toolbar_definition);
// Create a new buffer and a new view to show the buffer.
$buffer = new GtkTextBuffer();
$view = new GtkTextView();
$view->set_buffer($buffer);
$view->modify_font(new PangoFontDescription("Arial 12"));
$view->set_wrap_mode(Gtk::WRAP_WORD);
$vbox->pack_start($view);
$view->grab_focus();
// define the tags
$tag_table = $buffer->get_tag_table(); // note 1
$tag['Bold'] = new GtkTextTag();
$tag['Bold']->set_property('weight', Pango::WEIGHT_BOLD);
$tag_table->add($tag['Bold']);
$tag['Italic'] = new GtkTextTag();
$tag['Italic']->set_property('style', Pango::STYLE_ITALIC);
$tag_table->add($tag['Italic']);
$tag['Underline'] = new GtkTextTag();
$tag['Underline']->set_property('underline', Pango::UNDERLINE_SINGLE);
$tag_table->add($tag['Underline']);
$tag['Blue'] = new GtkTextTag();
$tag['Blue']->set_property('foreground', "#0000ff");
$tag_table->add($tag['Blue']);
$tag['Highlight'] = new GtkTextTag();
$tag['Highlight']->set_property('background', "#ffff00");
$tag_table->add($tag['Highlight']);
$window->show_all();
Gtk::main();
// setup toolbar
function setup_toolbar($vbox, $toolbar_definition) {
$toolbar = new GtkToolBar();
$vbox->pack_start($toolbar, 0, 0);
foreach($toolbar_definition as $item) {
if ($item=='<hr>') {
$toolbar->insert(new GtkSeparatorToolItem(), -1);
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Explanation We make use of the code in How to set up toolbar? to display the toolbar.
What's new here:
- Get the tag table name.
- Get the start and end iters of the selected text.
- Apply the tag!
Note
The sample code above only performs bold. When you press the bold button on a "bolded" text, it doesn't unbold. We will improve on this in Part 2.
Related Links
User reviews Average user ratings:  4.0 (from 7 users) Note: You have to be a registered member to leave a comment. Free registration here. |
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June 26, 2007 9:34am
Dont Works.
keit@darkstar:~/Desktop/PHase Current$ php-gtk2 prova
toolbar clicked: Bold
Warning: GtkTextBuffer::get_selection_bounds() requires exactly 2 arguments, 0 given in /home/keit/Desktop/PHase Current/prova on line 72
June 26, 2007 9:57am
I just tried it. Works on Gnope version, the latest php-gtk2 beta release, and builds by Elizabeth Smith. Which version of php-gtk2 are you using? And on what platform?
June 26, 2007 7:35pm
php-gtk2 On Linux Slackware
June 26, 2007 8:04pm
When was the last time you compiled your version of php-gtk2? Can you give the version number for some of the key ones - gtk, php and php-gtk2? If you have a more recent build of php-gtk2, I think it should work.
March 04, 2008 11:09am
How can i save all applied styles as html on to a txt file ???
April 03, 2008 4:19am
this will be a very nasty process as you would need the full plain text and you need to parse every thing in the gtktexttagstable->foreach() and apply the corresponding html tags to the text.
i dunno whether there is a simple "export()" but i guess there aint no function like that.
April 08, 2008 10:39am
I tried it and it worked perfectly out of the box. Understanding the tags is not easy for the beginner, and this example makes things very simple.