# Simple Treeview with ListStore (Vala)

Tiffany Antopolski
tiffany.antopolski@gmail.com 2012
Un widget pode mostrar calquera implementación de TreeModel (listas e árbores)
Fran Dieguez
frandieguez@gnome.org 2012-2013.

# TreeView simple con ListStore

Este TreeView mostra un ListStore simple con un sinal de selección «changed» conectado.

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); }

Neste exemplo empregaremos o seguinte:

Gtk.TreeView

Gtk.ListStore

Gtk.TreeSelection