//!/usr/bin/gjs

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

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

const Gdk = imports.gi.Gdk;

const GLib = imports.gi.GLib;

const Gio = imports.gi.Gio;

const Gtk = imports.gi.Gtk; 

class TooltipExample {

    // Create the application 

    constructor() {

        this.application = new Gtk.Application({

            application_id: 'org.example.jstooltip'

        });

        // 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: "Toolbar with Tooltips Example",

            default_width: 400,

            default_height: 200,

            border_width: 10

        });

        this.grid = new Gtk.Grid();

        this.toolbar = this._createToolbar();

        this.toolbar.set_hexpand(true);

        this.toolbar.show();

        this.grid.attach(this.toolbar, 0, 0, 1, 1);

        this.window.add(this.grid);

        this._newAction = new Gio.SimpleAction({ name: "new" });

        this._newAction.connect("activate", this._newCallback.bind(this));

        this.window.add_action(this._newAction);

        this._openAction = new Gio.SimpleAction({ name: "open" });

        this._openAction.connect("activate", this._openCallback.bind(this));

        this.window.add_action(this._openAction);

        this._undoAction = new Gio.SimpleAction({ name: "undo" });

        this._undoAction.connect("activate", this._undoCallback.bind(this));

        this.window.add_action(this._undoAction);

        this._fullScreenAction = new Gio.SimpleAction({ name: "fullscreenToggle" });

        this._fullScreenAction.connect("activate",

                                       this._fullScreenCallback.bind(this));

        this.window.add_action(this._fullScreenAction);

        this.window.show_all();

    }

    _createToolbar() {

        this.toolbar = new Gtk.Toolbar();

        this.toolbar.get_style_context().add_class(Gtk.STYLE_CLASS_PRIMARY_TOOLBAR);

        // button for the "new" action

        this.newButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_NEW);

        // with a tooltip with a given text        

        this.newButton.set_tooltip_text("Create a new file");

        this.newButton.set_is_important(true);

        this.toolbar.insert(this.newButton, 0);

        this.newButton.show();

        this.newButton.set_action_name("win.new");

        // button for the "open" action

        this.openButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_OPEN);

        // with a tooltip with a given text in the Pango markup language        

        this.openButton.set_tooltip_markup("Open an existing file");

        this.openButton.set_is_important(true);

        this.toolbar.insert(this.openButton, 1);

        this.openButton.show();

        this.openButton.set_action_name("win.open");

        // button for the "undo" action

        this.undoButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_UNDO);

        // with a tooltip with an image

        // set true the property "has-tooltip"        

        this.undoButton.set_property("has-tooltip", true);

        // connect to the callback function that for the tooltip

        // with the signal "query-tooltip"

        this.undoButton.connect("query-tooltip", this._undoTooltipCallback.bind(this));

        this.undoButton.set_is_important(true);

        this.toolbar.insert(this.undoButton, 2);

        this.undoButton.show();

        this.undoButton.set_action_name("win.undo");

        // button for the "fullscreen/leave fullscreen" action

        this.fullscreenButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_FULLSCREEN);

        this.fullscreenButton.set_is_important(true);

        this.toolbar.insert(this.fullscreenButton, 3);

        this.fullscreenButton.set_action_name("win.fullscreenToggle");

        return this.toolbar;

    }

    _newCallback(action, parameter) {

        print("You clicked \"New\".");

    }

    _openCallback(action, parameter) {

        print("You clicked \"Open\".");

    }

    // the callback function for the tooltip of the "undo" button

    _undoTooltipCallback(widget, x, y, keyboard_mode, tooltip) {

        // set the text for the tooltip

        tooltip.set_text("Undo your last action");

        // set an icon fot the tooltip

        tooltip.set_icon_from_stock(Gtk.STOCK_UNDO, Gtk.IconSize.MENU);

        // show the tooltip

        return true;

    }

    _undoCallback(action, parameter) {

        print("You clicked \"Undo\".");

    }

    _fullScreenCallback() {

        if ((this.window.get_window().get_state() & Gdk.WindowState.FULLSCREEN) != 0 ){

            this.fullscreenButton.set_stock_id(Gtk.STOCK_FULLSCREEN);

            this.fullscreenButton.set_tooltip_text("Make your window fullscreen");

            this.window.unfullscreen();

        } else {

            this.fullscreenButton.set_stock_id(Gtk.STOCK_LEAVE_FULLSCREEN);

            this.fullscreenButton.set_tooltip_text("Leave fullscreen");

            this.window.fullscreen();

        }

    }

};

// Run the application

let app = new TooltipExample ();

app.application.run (ARGV);