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by kksou
Sample Code 239: How to change tab order - Example 2? |
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Written by kksou
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Wednesday, 23 May 2007 |
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Problem This is a series of examples to show you how to change tab orders in PHP-GTK2.
Let's continue to extend Example 1.
Suppose now you would like to change the tab order to start from the bottom right button as shown below:
Solution Here are the rules to use GtkContainer::set_focus_chain() again:.
- The method takes only one argument - an array of GtkWidgets.
- All the widgets in the array must be direct descedents of the container.
- It's not necessary to define the tab orders of all levels.
In this example, we need to use GtkContainer::set_focus_chain() two times:
- To change the tab order to start from the right column.
- To change the tab order within the right column to start from the bottom right button.
Sample Code 1
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| <?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(480, 240);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Set tab order - Example 2");
$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, 0.5, 0, 0);
$alignment->add($title);
$vbox->pack_start($alignment, 0);
$vbox->pack_start(new GtkLabel("Note that the tab order ".
"now start from the bottom right button"), 0);
$vbox->pack_start(new GtkLabel(), 0);
$hbox = new GtkHBox();
$vbox->pack_start($hbox);
$hbox->pack_start($left_buttons = new GtkVBox());
$hbox->pack_start($right_buttons = new GtkVBox());
$button = array();
setup_buttons($left_buttons, 'left');
setup_buttons($right_buttons, 'right');
// set the tab order
$hbox->set_focus_chain(array($right_buttons, $left_buttons)); // note 1
$right_buttons->set_focus_chain(array( // note 2
$button['right'][3], $button['right'][2],
$button['right'][1], $button['right'][0]));
$window->show_all();
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- 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
- Set the tab order to start from the right column.
- Set the tab order to start from the button3, then button2, button1 and button0. As you can see, you can set the tab order in whatever orders you desire.
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