gnome-devel-docs 3.28.0-1 / usr / share / help / el / gnome-devel-demos / scale.vala.page

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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="scale.vala" xml:lang="el">
  <info>
  <title type="text">Κλίμακα (Vala)</title>
    <link type="guide" xref="beginner.vala#entry"/>
    <link type="seealso" xref="grid.vala"/>
    <link type="seealso" xref="label.vala"/>
    <revision version="0.1" date="2012-06-07" status="draft"/>

    <credit type="author copyright">
      <name>Tiffany Antopolski</name>
      <email its:translate="no">tiffany.antopolski@gmail.com</email>
      <years>2012</years>
    </credit>

    <desc>Ένας ολισθητής γραφικού στοιχείου για επιλογή μιας τιμής από μια περιοχή</desc>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Ελληνική μεταφραστική ομάδα GNOME</mal:name>
      <mal:email>team@gnome.gr</mal:email>
      <mal:years>2012-2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Δημήτρης Σπίγγος</mal:name>
      <mal:email>dmtrs32@gmail.com</mal:email>
      <mal:years>2012, 2013</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Μαρία Θουκιδίδου</mal:name>
      <mal:email>marablack3@gmail.com</mal:email>
      <mal:years>2014</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Θάνος Τρυφωνίδης</mal:name>
      <mal:email>tomtryf@gmail.com</mal:email>
      <mal:years>2014, 2015</mal:years>
    </mal:credit>
  </info>

  <title>Κλίμακα</title>
  <media type="image" mime="image/png" src="media/scale.png"/>
  <p>Ολίσθηση των κλιμάκων!</p>

<code mime="text/x-csharp" style="numbered">/* This is the application. */
public class MyApplication : Gtk.Application {
	Gtk.Scale h_scale;
	Gtk.Scale v_scale;
	Gtk.Label label;

	/* Override the 'activate' signal of GLib.Application. */
	protected override void activate () {
		var window = new Gtk.ApplicationWindow (this);
		window.title = "Scale Example";
		window.set_default_size (400, 300);
		window.set_border_width (5);

		h_scale = new Gtk.Scale.with_range (Gtk.Orientation.HORIZONTAL, 0.0, 100.0, 5.0);
		h_scale.set_digits (0); //number of decimal places displayed
		h_scale.set_valign (Gtk.Align.START); //horizontal alignment

		var adjustment = new Gtk.Adjustment (42.0, 0.0, 100.0, 5.0, 10.0, 0.0);
		v_scale = new Gtk.Scale (Gtk.Orientation.VERTICAL, adjustment);
		v_scale.set_vexpand(true);

		label = new Gtk.Label ("Move the scale handles...");

		var grid = new Gtk.Grid ();
		grid.set_column_spacing (10); //amount of space between columns
		grid.set_column_homogeneous (true); //all columns same width
		grid.attach (h_scale, 0, 0, 1, 1);
		grid.attach_next_to (v_scale, h_scale, Gtk.PositionType.RIGHT, 1, 1);
		grid.attach (label, 0, 1, 2, 1);

		h_scale.value_changed.connect (scale_moved);
		v_scale.value_changed.connect (scale_moved);

		window.add (grid);
		window.show_all ();
	}

	/* Callback function for "value-changed" signal.
	 * The parameter refers to the scale which emitted the signal.
	 * Since we are accessing the values of not one, but two scales,
	 * we made the ranges instance variables, and ignore the
	 * parameter.
	 */
	void scale_moved (Gtk.Range range) {
		label.set_text ("Horizontal scale is %.1f; vertical scale is %.1f.".printf (h_scale.get_value (), v_scale.get_value ()));
	}
}

/* main creates and runs the application. */
public int main (string[] args) {
	return new MyApplication ().run (args);
}
</code>
<p>Σε αυτό το παράδειγμα χρησιμοποιήσαμε τα παρακάτω:</p>
<list>
  <item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.Scale.html">Gtk.Scale</link></p></item>
  <item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.Adjustment.html">Gtk.Adjustment</link></p></item>
  <item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.PositionType.html">Gtk.PositionType</link></p></item>
  <item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.Orientation.html">Gtk.Orientation</link></p></item>
</list>
</page>

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