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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="combobox_multicolumn.vala" xml:lang="el">
<info>
<title type="text">ComboBox (Vala)</title>
<link type="guide" xref="beginner.vala#menu-combo-toolbar"/>
<link type="seealso" xref="combobox.vala"/>
<revision version="0.1" date="2013-06-18" status="review"/>
<credit type="author copyright">
<name>Tiffany Antopolski</name>
<email its:translate="no">tiffany.antopolski@gmail.com</email>
<years>2013</years>
</credit>
<desc>Ένα γραφικό στοιχείο χρησιμοποιείται για επιλογή από μια λίστα στοιχείων</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>2012-2014</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</mal:years>
</mal:credit>
</info>
<title>ComboBox (δύο στήλες)</title>
<media type="image" mime="image/png" src="media/combobox_multicolumn.png"/>
<p>Αυτό το ComboBox τυπώνει στον τερματικό την επιλογή σας όταν την αλλάζετε.</p>
<links type="section"/>
<section id="code">
<title>Ο χρησιμοποιούμενος κώδικας για παραγωγή αυτού παραδείγματος</title>
<code mime="text/x-csharp" style="numbered">class MyWindow : Gtk.ApplicationWindow {
string[] file = {"Select", "New", "Open", "Save"}·
string[] stock_item = {"","gtk-new", "gtk-open", "gtk-save"}·
enum Column {
FILE,
STOCK_ITEM
}
/* Constructor */
internal MyWindow (MyApplication app) {
Object (application: app, title: "Welcome to GNOME")·
this.set_default_size (200, -1)·
this.border_width = 10·
Gtk.ListStore liststore = new Gtk.ListStore (2, typeof (string), typeof (string))·
for (int i = 0· i < file.length· i++){
Gtk.TreeIter iter·
liststore.append (out iter)·
liststore.set (iter, Column.FILE, file[i])·
liststore.set (iter, Column.STOCK_ITEM, stock_item[i])·
}
Gtk.ComboBox combobox = new Gtk.ComboBox.with_model (liststore)·
/* CellRenderers render the data. */
Gtk.CellRendererText cell = new Gtk.CellRendererText ()·
Gtk.CellRendererPixbuf cell_pb = new Gtk.CellRendererPixbuf ()·
/* we pack the cell into the beginning of the combobox, allocating
* no more space than needed·
* first the image, then the text·
* note that it does not matter in which order they are in the model,
* the visualization is decided by the order of the cellrenderers
*/
combobox.pack_start (cell_pb, false)·
combobox.pack_start (cell, false)·
/* associate a property of the cellrenderer to a column in the model
* used by the combobox
*/
combobox.set_attributes (cell_pb, "stock_id", Column.STOCK_ITEM)·
combobox.set_attributes (cell, "text", Column.FILE)·
/* Set the first item in the list to be selected (active). */
combobox.set_active (0)·
/* Connect the 'changed' signal of the combobox
* to the signal handler (aka. callback function.
*/
combobox.changed.connect (this.item_changed)·
/* Add the combobox to this window */
this.add (combobox)·
combobox.show ()·
}
void item_changed (Gtk.ComboBox combo) {
if (combo.get_active () !=0) {
print ("You chose " + file [combo.get_active ()] +"\n")·
}
}
}
class MyApplication : Gtk.Application {
protected override void activate () {
new MyWindow (this).show ()·
}
}
int main (string[] args) {
return new MyApplication ().run (args)·
}
</code>
</section>
<section id="references">
<title>Αναφορές API</title>
<p>Σε αυτό το παράδειγμα χρησιμοποιήσαμε τα παρακάτω:</p>
<list>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.ComboBox.html">GtkComboBox</link></p></item>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.ListStore.html">GtkListStore</link></p></item>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.CellRendererText.html">GtkCellRendererText</link></p></item>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.CellRendererPixbuf.html">GtkCellRendererPixbuf</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/gtk3-Stock-Items.html">Stock Items</link></p></item>
</list>
</section>
</page>
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