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#!/usr/bin/gjs
imports.gi.versions.Gdk = '3.0';
imports.gi.versions.Gtk = '3.0';
const Gdk = imports.gi.Gdk;
const GObject = imports.gi.GObject;
const Gtk = imports.gi.Gtk;
class ColorbuttonExample {
// Create the application itself
constructor() {
this.application = new Gtk.Application ({ application_id: 'org.example.jscolorbutton' });
// 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 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: "ColorButton",
default_width: 150,
default_height: 50,
border_width: 10 });
this.button = new Gtk.ColorButton();
this.color = new Gdk.RGBA();
this.color.red = 0.0;
this.color.green = 0.0;
this.color.blue = 1.0;
this.color.alpha = 0.5;
this.button.set_rgba(this.color);
this.button.connect("color-set", this.onColorChosen.bind(this));
this.label = new Gtk.Label();
this.label.set_text("Click to choose a color");
let grid = new Gtk.Grid();
grid.attach(this.button, 0, 0, 2, 1);
grid.attach(this.label, 0, 1, 2, 1);
this.window.add(grid);
this.window.show_all();
}
onColorChosen() {
let colorName = this.color.to_string();
this.label.set_text("You chose the color " + colorName);
}
};
// Run the application
let app = new ColorbuttonExample ();
app.application.run (ARGV);
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