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by kksou
Sample Code 107: How to set the button to the exact size you want - Part 3 - group of buttons? |
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Written by kksou
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Monday, 04 December 2006 |
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Problem You would like to center a group of buttons, all of size 80x32, as shown below:
Solution
- Create the buttons with GtkButton.
- Pack the buttons in a GtkHBox.
- Create an alignment container with GtkAlignment, and set the desired x/y aligntment and x/y scale.
- Stuff the hbox inside the aligment container.
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 150);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Set the size of button to exactly 80 x 32\nGroup of buttons - using GtkAlignment");
$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);
$vbox->pack_start($title, 0, 0);
$hbox = new GtkHBox(); // note 1
for ($i=0; $i<3; ++$i) {
$button = new GtkButton('button '.($i+1));
$button->set_size_request(80, 32);
$button->connect('clicked', 'on_click');
$hbox->pack_start($button);
$hbox->pack_start(new GtkLabel('')); // add a small gap
}
$alignment = new GtkAlignment(0.5, 0, 0, 0);
$alignment->add($hbox); // note 2
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Explanation
- Create the hbox to hold the buttons.
- Create a gtkalignment container. Here we set the x-alignment to be 0.5 to center the button.
- Stuff the hbox in the alignment container, and then pack the alignment container in turn in the containing vbox.
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