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by kksou
Sample Code 224: How to set the tab position for GtkTextView - Part 1 - in pixel unit? |
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Written by kksou
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Wednesday, 02 May 2007 |
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Problem By default, GtkTreeView sets the tab at every eighth character as shown below:
You would like to change the tab position of a GtkTextView. In this Part 1, we will show how to set the tab position using pixel value (e.g. every 100 pixels) 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());
// display title
$title = new GtkLabel("Set the Tab Position of GtkTextView\n".
"Part 1 - by pixel unit");
$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);
$title->set_justify(Gtk::JUSTIFY_CENTER);
$alignment = new GtkAlignment(0.5, 0, 0, 0);
$alignment->add($title);
$vbox->pack_start($alignment, 0, 0);
$vbox->pack_start(new GtkLabel(), 0, 0);
// 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("Courier New"));
$view->set_wrap_mode(Gtk::WRAP_WORD);
$tabs = new PangoTabArray(0, true); // note 1
$tabs->set_tab(0, PANGO::TAB_LEFT, 100); // note 2
$tabs->set_tab(1, PANGO::TAB_LEFT, 200); // note 2
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Explanation
- Create a new PangoTabArray. Note that for the second parameter, set the value to
true to use pixel unit. Otherwise it will use pango unit.
- Set the tab positions. In this example, we set a tab for every 100 pixels.
- Set the tab on the treeview.
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