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Problem You have set up a horizontal screen ruler in Part 2. Now you would like to be able to switch between horizontal ruler and vertical ruler at the press of a key (F12) as shown below. This example also shows how to have two windows running concurrently in a php-gtk application.
Solution This example makes use of the technique as described in the article How to run multiple applications in multiple windows - Part 1?
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| <?php
$apps['hruler'] = setup_app('hruler'); // note 1
$apps['vruler'] = setup_app('vruler'); // note 2
$apps['hruler']->show_all();
$apps['hruler']->run();
// setup_app
function setup_app($module) {
$dialog = new GtkDialog($module, null, Gtk::DIALOG_MODAL|Gtk::DIALOG_NO_SEPARATOR);
$dialog->set_position(Gtk::WIN_POS_CENTER_ALWAYS);
$eventbox = new GtkEventBox();
if ($module=='hruler') {
$ruler = new GtkHRuler(); // note 1
$ruler->set_range(0, 800, 100, 1024);
$ruler->set_size_request(800, 20);
$eventbox->add($ruler);
} else {
$ruler = new GtkVRuler(); // note 2
$ruler->set_range(0, 400, 100, 800);
$ruler->set_size_request(20, 400);
$hbox = new GtkHBox();
global $ypos;
$ypos = new GtkLabel(); // note 3
$vbox = new GtkVBox();
$vbox->pack_start($ypos, 0, 0);
$vbox->pack_start(new GtkLabel(), 0, 0);
$vbox->pack_start(new GtkLabel("Press F12 to switch \nto horizontal ruler"), 0, 0);
$vbox->pack_start(new GtkLabel()); // note 4
$hbox->pack_start($vbox);
$hbox->pack_start($ruler, 0, 0);
$eventbox->add($hbox);
}
$eventbox->connect('motion-notify-event', 'on_motion', $dialog, $module);
$dialog->vbox->pack_end($eventbox, 0, 0);
$dialog->connect('key-press-event', "on_key", $module); // catch F12
$vbox_contents = $dialog->vbox->get_children();
$hbuttonbox = $vbox_contents[1];
$class_name = $hbuttonbox->get_name();
$hbuttonbox->set_size_request(0,0);
return $dialog; // returns the ID of the dialog
}
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Explanation This example makes use of the code in How to run multiple applications in multiple windows - Part 1?.
What's new here:
- Set up the horizontal ruler in a new GtkDialog.
- Set up the vertical ruler in another GtkDialog.
- For the horizontal ruler, we display the x-pos of the mouse location in the dialog title. For the vertical ruler, there is not enough space in the title bar. So we need to create a GtkLabel to display the y-pos of the mouse.
- This empty GtkLabel helps to "push" the previous two labels up so that they stay at the top of the vertical ruler.
- When user press F12, alternate between hruler and vruler, hide the active ruler, and show the other one.
- Display the mouse position.
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