8.1. From Swing to GTK+

Simple GUI App

Java

import javax.swing.*;

public class HelloWorldFrame extends JFrame {

    public HelloWorldFrame() {
        JLabel label = new JLabel("Hello World");
        add(label);
        setSize(100, 100);
    }

    public static void main(String args[]) {
        JFrame frame = new HelloWorldFrame();
        frame.setVisible(true);
    }
}

Vala

using Gtk;

public class HelloWorldWindow : Window {

    public HelloWorldWindow () {
        var label = new Label ("Hello World");
        add (label);
        set_default_size (100, 100);
    }
}

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

    var win = new HelloWorldWindow ();
    win.show_all ();

    Gtk.main ();
}

Must be compiled with --pkg gtk+-3.0.

Transition Table

Rough equivalents between common Swing types and GTK+ 3 widgets. See Valadoc for full APIs.

Swing	GTK+
JButton	Button
JCheckBox	CheckButton
JColorChooser	ColorSelection
JComboBox	ComboBox
JComponent	Widget
JDialog	Dialog
JEditorPane	TextView
JFileChooser	FileChooserDialog
JFrame	Window
JLabel	Label
JList	TreeView with ListStore
JMenu	Menu
JMenuBar	MenuBar
JOptionPane	MessageDialog
JPanel	Container (depending on layout: Box, Table, Fixed, …)
JPasswordField	Entry with visibility = false
JProgressBar	ProgressBar
JRadioButton	RadioButton
JScrollPane	ScrolledWindow
JSeparator	Separator
JSlider	Scale
JSpinner	SpinButton
JSplitPane	Paned
JTabbedPane	Notebook
JTable	TreeView with ListStore
JTextArea	TextView
JTextField	Entry
JTextPane	TextView
JToolBar	Toolbar
JToolTip	Tooltip
JTree	TreeView with TreeStore
JViewport	Viewport