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<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="tooltip.js" xml:lang="cs">
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<info>
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<title type="text">Tooltip (JavaScript)</title>
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<link type="guide" xref="beginner.js#misc"/>
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<link type="seealso" xref="toolbar.js"/>
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<revision version="0.1" date="2013-06-25" status="review"/>
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<credit type="author copyright">
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<name>Meg Ford</name>
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<email its:translate="no">megford@gnome.org</email>
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<years>2013</years>
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</credit>
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<desc>Přidání vysvětlivek do vašich widgetů</desc>
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</info>
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<title>Tooltip</title>
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<media type="image" mime="image/png" src="media/tooltip.png"/>
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Nástrojová lišta s vysvětlivkami (s obrázky) u tlačítek.
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<note>Tento příklad navazuje na příklad <link xref="toolbar.js">Toolbar</link>. </note>
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<links type="section"/>
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<section id="code">
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<title>Kód použitý k vygenerování tohoto příkladu</title>
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//!/usr/bin/gjs
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imports.gi.versions.Gdk = '3.0';
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imports.gi.versions.Gtk = '3.0';
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const Gdk = imports.gi.Gdk;
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const GLib = imports.gi.GLib;
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const Gio = imports.gi.Gio;
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const Gtk = imports.gi.Gtk;
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class TooltipExample {
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// Vytvoří aplikaci
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constructor() {
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this.application = new Gtk.Application({
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application_id: 'org.example.jstooltip'
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});
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// Napojí signály "activate" a "startup" k funkcím zpětného volání
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this.application.connect('activate', this._onActivate.bind(this));
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this.application.connect('startup', this._onStartup.bind(this));
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}
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// Funkce zpětného volání pro signál "activate" zobrazujicí okno při aktivaci
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_onActivate() {
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this.window.present();
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}
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// Funkce zpětného volání pro signál "startup" sestavující uživatelské rozhraní
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_onStartup() {
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this._buildUI();
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}
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// Sestaví uživatelské rozhraní aplikace
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_buildUI() {
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// Vytvoří okno aplikace
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this.window = new Gtk.ApplicationWindow({
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application: this.application,
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window_position: Gtk.WindowPosition.CENTER,
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title: "Toolbar with Tooltips Example",
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default_width: 400,
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default_height: 200,
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border_width: 10
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});
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this.grid = new Gtk.Grid();
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this.toolbar = this._createToolbar();
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this.toolbar.set_hexpand(true);
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this.toolbar.show();
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this.grid.attach(this.toolbar, 0, 0, 1, 1);
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this.window.add(this.grid);
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this._newAction = new Gio.SimpleAction({ name: "new" });
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this._newAction.connect("activate", this._newCallback.bind(this));
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this.window.add_action(this._newAction);
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this._openAction = new Gio.SimpleAction({ name: "open" });
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this._openAction.connect("activate", this._openCallback.bind(this));
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this.window.add_action(this._openAction);
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this._undoAction = new Gio.SimpleAction({ name: "undo" });
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this._undoAction.connect("activate", this._undoCallback.bind(this));
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this.window.add_action(this._undoAction);
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this._fullScreenAction = new Gio.SimpleAction({ name: "fullscreenToggle" });
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this._fullScreenAction.connect("activate",
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this._fullScreenCallback.bind(this));
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this.window.add_action(this._fullScreenAction);
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this.window.show_all();
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}
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_createToolbar() {
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this.toolbar = new Gtk.Toolbar();
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this.toolbar.get_style_context().add_class(Gtk.STYLE_CLASS_PRIMARY_TOOLBAR);
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// Tlačítko pro akci „new“
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this.newButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_NEW);
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// s vysvětlivkou se zadaným textem
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this.newButton.set_tooltip_text("Create a new file");
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this.newButton.set_is_important(true);
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this.toolbar.insert(this.newButton, 0);
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this.newButton.show();
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this.newButton.set_action_name("win.new");
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// Tlačítko pro akci „open“
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this.openButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_OPEN);
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// s vysvětlivkou se zadaným textem ve značkovacím jazyce Pango
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this.openButton.set_tooltip_markup("Open an <i>existing</i> file");
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this.openButton.set_is_important(true);
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this.toolbar.insert(this.openButton, 1);
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this.openButton.show();
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this.openButton.set_action_name("win.open");
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// Tlačítko pro akci „undo“
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this.undoButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_UNDO);
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// s vysvětlivkou s obrázkem
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// Nataví vlastnost „has-tooltip“ na true
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this.undoButton.set_property("has-tooltip", true);
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// Napojí funkci zpětného volání pro vysvětlivku
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// se signálem „query-tooltip“
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this.undoButton.connect("query-tooltip", this._undoTooltipCallback.bind(this));
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this.undoButton.set_is_important(true);
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this.toolbar.insert(this.undoButton, 2);
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this.undoButton.show();
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this.undoButton.set_action_name("win.undo");
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// Tlačítko pro akci „fullscreen/leave fullscreen“
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this.fullscreenButton = Gtk.ToolButton.new_from_stock(Gtk.STOCK_FULLSCREEN);
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this.fullscreenButton.set_is_important(true);
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this.toolbar.insert(this.fullscreenButton, 3);
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this.fullscreenButton.set_action_name("win.fullscreenToggle");
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return this.toolbar;
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}
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_newCallback(action, parameter) {
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print("You clicked \"New\".");
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}
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_openCallback(action, parameter) {
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print("You clicked \"Open\".");
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}
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// Funkce zpětného volání pro vysvětlivku tlačítka „undo“
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_undoTooltipCallback(widget, x, y, keyboard_mode, tooltip) {
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// Nastaví text pro vysvětlivku
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tooltip.set_text("Undo your last action");
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// Nastaví ikonu pro vysvětlivku
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tooltip.set_icon_from_stock(Gtk.STOCK_UNDO, Gtk.IconSize.MENU);
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// Zobrazí vysvětlivku
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return true;
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}
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_undoCallback(action, parameter) {
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print("You clicked \"Undo\".");
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}
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_fullScreenCallback() {
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if ((this.window.get_window().get_state() & Gdk.WindowState.FULLSCREEN) != 0 ){
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this.fullscreenButton.set_stock_id(Gtk.STOCK_FULLSCREEN);
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this.fullscreenButton.set_tooltip_text("Make your window fullscreen");
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this.window.unfullscreen();
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} else {
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this.fullscreenButton.set_stock_id(Gtk.STOCK_LEAVE_FULLSCREEN);
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this.fullscreenButton.set_tooltip_text("Leave fullscreen");
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this.window.fullscreen();
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}
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}
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};
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// Spustí aplikaci
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let app = new TooltipExample ();
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app.application.run (ARGV);
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</section>
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<section id="references">
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<title>Odkazy k API</title>
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V této ukázce se používá následující:
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<list>
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<item><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Tooltip.html">GtkTooltip</link> </item>
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<item><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Toolbar.html">GtkToolbar</link> </item>
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<item><link href="http://www.roojs.com/seed/gir-1.2-gtk-3.0/gjs/Gtk.Widget.html">GtkWidget</link> </item>
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<item><link href="http://developer.gnome.org/gtk3/stable/gtk3-Stock-Items.html">Standardní položky</link> </item>
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</list>
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</section>
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</page>
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