# Grid (JavaScript)

Susanna Huhtanen
ihmis.suski@gmail.com 2012
Taryn Fox
jewelfox@fursona.net
Pack widgets in rows and columns
Rafael Fontenelle
rafaelff@gnome.org 2013, 2018

# Grid

A button widget connected to a progress bar, inside of a grid which handles the layout.

#!/usr/bin/gjs

imports.gi.versions.Gtk = '3.0';

const Gio = imports.gi.Gio; const GLib = imports.gi.GLib; const Gtk = imports.gi.Gtk;

class GridExample {

/* Create the application itself This boilerplate code is needed to build any GTK+ application. */ constructor() { this.application = new Gtk.Application ({ application_id: 'org.example.jsgrid', flags: Gio.ApplicationFlags.FLAGS_NONE });

// Connect 'activate' and 'startup' signals to the callback functions this.application.connect('activate', this._onActivate.bind(this)); this.application.connect('startup', this._onStartup.bind(this)); }

// Callback function for 'activate' signal presents windows when active _onActivate() { this._window.present(); }

// Callback function for 'startup' signal initializes menus and builds the UI _onStartup() { this._buildUI(); }

// Build the application's UI _buildUI() {

// Create the application window this._window = new Gtk.ApplicationWindow ({ application: this.application, window_position: Gtk.WindowPosition.CENTER, title: "Grid Example"});

// Create the grid this.Grid = new Gtk.Grid ();

// Create the widgets inside the grid this.progressBar = new Gtk.ProgressBar (); this.Button = new Gtk.Button ({ label: "Button" }); this.Button.connect ("clicked", this._clickHandler.bind(this));

// Assemble the grid this._window.add (this.Grid); this.Grid.attach (this.Button, 1, 1, 1, 1); this.Grid.attach_next_to (this.progressBar, this.Button, Gtk.PositionType.BOTTOM, 1, 1);

// Show the window and all child widgets this._window.show_all(); }

// Here's the function that says what happens when the button is clicked _clickHandler() { this.progressBar.pulse (); }

};

// Run the application let app = new GridExample (); app.application.run (ARGV);

In this sample we used the following:

Gtk.Application

Gtk.ApplicationWindow

Gtk.Button

Gtk.Grid

Gtk.ProgressBar