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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="treeview_simple_liststore.vala" xml:lang="de">
<info>
<title type="text">Simple Treeview with ListStore (Vala)</title>
<link type="guide" xref="beginner.vala#treeview"/>
<link type="seealso" xref="grid.vala"/>
<link type="seealso" xref="label.vala"/>
<revision version="0.1" date="2012-05-09" status="draft"/>
<credit type="author copyright">
<name>Tiffany Antopolski</name>
<email its:translate="no">tiffany.antopolski@gmail.com</email>
<years>2012</years>
</credit>
<desc>A widget can display any TreeModel implementation (lists and trees)</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Mario Blättermann</mal:name>
<mal:email>mario.blaettermann@gmail.com</mal:email>
<mal:years>2011, 2013</mal:years>
</mal:credit>
</info>
<title>Simple Treeview with ListStore</title>
<media type="image" mime="image/png" src="media/treeview_simple_liststore.png"/>
<p>This TreeView displays a simple ListStore with the Selection "changed" signal connected.</p>
<code mime="text/x-csharp" style="numbered">public class PhoneBookEntry {
public string firstname;
public string lastname;
public string phone;
public PhoneBookEntry (string f, string l, string p) {
this.firstname = f;
this.lastname = l;
this.phone = p;
}
}
class TreeViewSimpleListStore : Gtk.ApplicationWindow {
Gtk.Label label;
PhoneBookEntry[] phonebook = {
new PhoneBookEntry ("Jurg", "Billeter", "555-0123"),
new PhoneBookEntry ("Johannes", "Schmid", "555-1234"),
new PhoneBookEntry ("Julita", "Inca", "555-2345"),
new PhoneBookEntry ("Javier", "Jardon", "555-3456"),
new PhoneBookEntry ("Jason", "Clinton", "555-4567"),
new PhoneBookEntry ("Random J.", "Hacker", "555-5678")
};
enum Column {
FIRSTNAME,
LASTNAME,
PHONE
}
internal TreeViewSimpleListStore (MyApplication app) {
Object (application: app, title: "My Phone Book");
this.set_default_size (250, 100);
this.border_width = 10;
var view = new Gtk.TreeView ();
this.setup_treeview (view);
view.expand = true;
label = new Gtk.Label ("");
var grid = new Gtk.Grid ();
grid.attach (view, 0, 0, 1, 1);
grid.attach (label, 0, 1, 1, 1);
this.add (grid);
var selection = view.get_selection ();
selection.changed.connect (this.on_changed);
}
void setup_treeview (Gtk.TreeView view) {
var listmodel = new Gtk.ListStore (3, typeof (string),
typeof (string),
typeof (string));
view.set_model (listmodel);
var cell = new Gtk.CellRendererText ();
/* 'weight' refers to font boldness.
* 400 is normal.
* 700 is bold.
*/
cell.set ("weight_set", true);
cell.set ("weight", 700);
/*columns*/
view.insert_column_with_attributes (-1, "First Name",
cell, "text",
Column.FIRSTNAME);
view.insert_column_with_attributes (-1, "Last Name",
new Gtk.CellRendererText (),
"text", Column.LASTNAME);
view.insert_column_with_attributes (-1, "Phone Number",
new Gtk.CellRendererText (),
"text", Column.PHONE);
/* Insert the phonebook into the ListStore */
Gtk.TreeIter iter;
for (int i = 0; i < phonebook.length; i++) {
listmodel.append (out iter);
listmodel.set (iter, Column.FIRSTNAME,
phonebook[i].firstname,
Column.LASTNAME, phonebook[i].lastname,
Column.PHONE, phonebook[i].phone);
}
}
void on_changed (Gtk.TreeSelection selection) {
Gtk.TreeModel model;
Gtk.TreeIter iter;
string name;
string lastname;
string phone;
if (selection.get_selected (out model, out iter)) {
model.get (iter,
Column.FIRSTNAME, out name,
Column.LASTNAME, out lastname,
Column.PHONE, out phone);
label.set_text ("\n" + name + " " + lastname + " " + phone);
}
}
}
class MyApplication : Gtk.Application {
protected override void activate () {
/* Create new Window and show all the things. */
new TreeViewSimpleListStore (this).show_all ();
}
internal MyApplication () {
Object (application_id: "example.liststore.simple.treeview");
}
}
int main (string[] args) {
return new MyApplication ().run (args);
}
</code>
<p>
In this sample we used the following:
</p>
<list>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.TreeView.html">Gtk.TreeView</link></p></item>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.ListStore.html">Gtk.ListStore</link></p></item>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.TreeSelection.html">Gtk.TreeSelection</link></p></item>
</list>
</page>
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