Gtk+ / Vala Example

int main(string[] args){
	Gtk.init(ref args);

	// Declare Window
	var exampleWindow = new Gtk.Window();
	exampleWindow.title = "example";
	exampleWindow.border_width = 0;
	exampleWindow.window_position = Gtk.WindowPosition.CENTER;
	exampleWindow.set_default_size(800, 600);
	// End of Declaring Window

	// Declare Container for Window
	var exampleContainer = new Gtk.Grid();
	exampleContainer.set_column_homogeneous(false);
	exampleContainer.set_hexpand(true);
	exampleWindow.add(exampleContainer);

	// Create / Declare Toolbar
	var exampleMainToolbar = new Gtk.Toolbar();
	exampleMainToolbar.icon_size = 32;
	exampleMainToolbar.show_arrow = false;
	exampleMainToolbar.margin = 0;
	exampleMainToolbar.set_hexpand(true);

		// Search Box
		var exampleSearchBoxContainer = new Gtk.ToolItem();
		exampleSearchBoxContainer.set_margin_left(6);

		var exampleSearchBox = new Gtk.Entry();
		exampleSearchBox.set_text("Search Your Tasks..."); // Set the search box text to...
		exampleSearchBox.set_icon_from_stock(Gtk.EntryIconPosition.PRIMARY, Gtk.Stock.FIND); // Set the icon on the right of the entry box to be the clear button
		exampleSearchBox.icon_press.connect((pos, event) => {
			if (pos == Gtk.EntryIconPosition.SECONDARY){ // If we in fact clicked on the Clear button
				exampleSearchBox.set_text("Search Your Tasks"); // Reset the search box text
			}
			else{ // If we didn't click the clear button a.k.a we clicked elsewhere on the input
				exampleSearchBox.set_text(""); // Clear the input.
			}
		});
		// End of Search Box

		// Global menu

		var exampleGlobalMenuContainer = new Gtk.ToolItem();
		exampleGlobalMenuContainer.tooltip_text = "Menu";

		var exampleGlobalMenuButton = new Gtk.ToolButton.from_stock(Gtk.Stock.PROPERTIES);
		var exampleGlobalMenu = new Gtk.Menu();

		exampleGlobalMenuButton.clicked.connect(() => {
			// I shall do nothing...for now
		});

		var exampleGlobalMenu_SettingsMenuItem = new Gtk.MenuItem();
		exampleGlobalMenu_SettingsMenuItem.set_label("Settings");
		exampleGlobalMenu.attach(exampleGlobalMenu_SettingsMenuItem, 0, 0, 0, 0);


		// End of Global menu
		exampleSearchBoxContainer.add(exampleSearchBox); // Insert the search box into the toolitem container
		exampleGlobalMenuContainer.add(exampleGlobalMenuButton); // Insert the menu button and menu into the menu container
		exampleGlobalMenuContainer.add(exampleGlobalMenu); // Insert the menu into the menu container
		exampleMainToolbar.insert(exampleSearchBoxContainer, 0); // Insert the search box container to the left in the toolbar
		exampleMainToolbar.insert(exampleGlobalMenuContainer, 1); // Insert the global menu container to the right in the toolbar


	// End of Creating / Declaring Toolbar

	exampleContainer.add(exampleMainToolbar); // Add the toolbar to the grid container
	exampleWindow.add(exampleContainer); // Add the grid container to the window
	exampleWindow.show_all();

	Gtk.main();
	return 0;
}