200. How to set GtkTextView to look like GtkLabel?

Problem

A standard GtkTextView has a white background as shown below:

You would like to set the background color of the GtkTextView to the default gray color of the window so that the GtkTextView looks like a GtkLabel as shown below:

How to set GtkTextView to look like GtkLabel?


Solution


Sample Code

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<?php
$window = &new GtkWindow();
$window->connect_simple('destroy', array( 'Gtk', 'main_quit'));
$window->set_size_request(400,200);
$window->add($vbox = new GtkVBox());

// display title
$title = new GtkLabel("Set bg color of textview to default bg color");
$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);

$window->realize(); // note 1
$org_bg = $window->get_style()->bg[Gtk::STATE_NORMAL]; // note 2

// setup textview and textbuffer
$buffer = new GtkTextBuffer();
$view = new GtkTextView();
$view->set_buffer($buffer);
$view->modify_font(new PangoFontDescription("Arial 12"));
$view->set_wrap_mode(Gtk::WRAP_WORD);

$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
$scrolled_win->add($view);

$vbox->pack_start($scrolled_win);

$buffer->set_text("This is a GtkTextView\n".
"disguised as a GtkLabel by setting ".
"the bg color to be the default gray of the window");
$view->modify_base(Gtk::STATE_NORMAL, $org_bg); // note 3

$window->show_all();
Gtk::main();

?>

Output

As shown above.

 

Explanation

  1. Remember to realize the window before making a copy of the original background color. Try commenting this line out and you will find that you won't get the original color.
  2. Make a copy of the original background color.
  3. Set the GtkTextView to the default gray, making it look like a GtkLabel.

Note

Note that we make use of exactly the same technique as we have used in How to set the background to original default color?

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