package jminhep.gui;

import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import java.awt.*;
import java.awt.event.*;

/**
 * Font selector
 * 
 * @author S.Chekanov Aug 20, 2006
 * 
 */

public class FontChooser extends JDialog {

	public static final long serialVersionUID = 226;

	/**
	 * Available font styles.
	 */
	private static final String[] STYLES = new String[] { "Plain", "Bold",
			"Italic", "Bold Italic" };

	/**
	 * Available font sizes.
	 */
	private static final String[] SIZES = new String[] { "3", "4", "5", "6",
			"7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17",
			"18", "19", "20", "22", "24", "27", "30", "34", "39", "45", "51",
			"60" };

	// Lists to display
	private NwList _styleList;

	private NwList _fontList;

	private NwList _sizeList;

	// Swing elements
	private JButton _okButton;

	private JButton _cancelButton;

	private JLabel _sampleText = new JLabel();

	private boolean _clickedOK = false;

	/**
	 * Constructs a new modal FontChooser for the given frame, using the
	 * specified font.
	 */
	private FontChooser(Frame parent, Font font) {
		super(parent, true);
		initAll();
		if (font == null)
			font = _sampleText.getFont();
		_fontList.setSelectedItem(font.getName());
		_sizeList.setSelectedItem(font.getSize() + "");
		_styleList.setSelectedItem(STYLES[font.getStyle()]);
		// this.setResizable(false);
		resize();
	}

	/**
	 * Method used to show the font chooser, and select a new font.
	 * 
	 * @param parent
	 *            The parent frame.
	 * @param title
	 *            The title for this window.
	 * @param font
	 *            The previously chosen font.
	 * @return the newly chosen font.
	 */
	public static Font showDialog(Frame parent, String title, Font font) {
		FontChooser fd = new FontChooser(parent, font);
		fd.setTitle(title);
		fd.setVisible(true);
		Font chosenFont = null;
		if (fd.clickedOK()) {
			chosenFont = fd.getFont();
		}
		fd.dispose();
		return (chosenFont);
	}

	/**
	 * Shows the font chooser with a standard title ("Font Chooser").
	 */
	public static Font showDialog(Frame parent, Font font) {
		return showDialog(parent, "Font Chooser", font);
	}

	private void initAll() {
		getContentPane().setLayout(null);
		setBounds(50, 50, 425, 400);
		_sampleText = new JLabel();
		addLists();
		addButtons();
		_sampleText.setForeground(Color.black);
		getContentPane().add(_sampleText);
		addWindowListener(new WindowAdapter() {
			public void windowClosing(java.awt.event.WindowEvent e) {
				setVisible(false);
			}
		});
		addComponentListener(new ComponentAdapter() {
			public void componentResized(ComponentEvent evt) {
				resize();
			}
		});
	}

	private void resize() {
		int w = getWidth();
		int h = getHeight();
		double wf = (double) w / 425;
		int w2 = (int) (80 * wf);
		int w3 = (int) (50 * wf);
		if (w3 < 30)
			w3 = 30;
		int w1 = w - w2 - w3 - 25;
		_fontList.setBounds(5, 5, w1, h - 91);
		_styleList.setBounds(w1 + 10, 5, w2, h - 91);
		_sizeList.setBounds(w1 + w2 + 15, 5, w3, h - 91);
		_sampleText.setBounds(10, h - 78, w - 20, 45);
		_okButton.setBounds(w - 165, h - 55, 70, 20);
		_cancelButton.setBounds(w - 81, h - 55, 70, 20);
		validate();
	}

	private void addLists() {
		_fontList = new NwList(GraphicsEnvironment
				.getLocalGraphicsEnvironment().getAvailableFontFamilyNames());
		_styleList = new NwList(STYLES);
		_sizeList = new NwList(SIZES);
		getContentPane().add(_fontList);
		getContentPane().add(_styleList);
		getContentPane().add(_sizeList);
	}

	private void addButtons() {
		_okButton = new JButton("OK");
		_okButton.setMargin(new Insets(0, 0, 0, 0));
		_cancelButton = new JButton("Cancel");
		_cancelButton.setMargin(new Insets(0, 0, 0, 0));
		_okButton.setFont(new Font(" ", 1, 11));
		_cancelButton.setFont(new Font(" ", 1, 12));
		getContentPane().add(_okButton);
		getContentPane().add(_cancelButton);
		_okButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				setVisible(false);
				_clickedOK = true;
			}
		});
		_cancelButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				setVisible(false);
				_clickedOK = false;
			}
		});
	}

	private void showSample() {
		int g = 0;
		try {
			g = Integer.parseInt(_sizeList.getSelectedValue());
		} catch (NumberFormatException nfe) {
		}
		String st = _styleList.getSelectedValue();
		int s = Font.PLAIN;
		if (st.equalsIgnoreCase("Bold"))
			s = Font.BOLD;
		if (st.equalsIgnoreCase("Italic"))
			s = Font.ITALIC;
		if (st.equalsIgnoreCase("Bold Italic"))
			s = Font.BOLD | Font.ITALIC;
		_sampleText.setFont(new Font(_fontList.getSelectedValue(), s, g));
		_sampleText.setText("sample text to be used in JRunMC");
		_sampleText.setVerticalAlignment(SwingConstants.TOP);
	}

	/**
	 * Returns whether the user clicked OK when the dialog was closed. (If
	 * false, the user clicked cancel.)
	 */
	public boolean clickedOK() {
		return _clickedOK;
	}

	/**
	 * Returns the currently selected Font.
	 */
	public Font getFont() {
		return _sampleText.getFont();
	}

	/**
	 * Private inner class for a list which displays a list of options in
	 * addition to a label indicating the currently selected item.
	 */
	public class NwList extends JPanel {

		public static final long serialVersionUID = 227;

		JList jl;

		JScrollPane sp;

		JLabel jt;

		String si = " ";

		public NwList(String[] values) {
			setLayout(null);
			jl = new JList(values);
			sp = new JScrollPane(jl);
			jt = new JLabel();
			jt.setBackground(Color.white);
			jt.setForeground(Color.black);
			jt.setOpaque(true);
			jt.setBorder(new JTextField().getBorder());
			jt.setFont(getFont());
			jl.addListSelectionListener(new ListSelectionListener() {
				public void valueChanged(ListSelectionEvent e) {
					jt.setText((String) jl.getSelectedValue());
					si = (String) jl.getSelectedValue();
					showSample();
				}
			});
			add(sp);
			add(jt);
		}

		public void setBounds(int x, int y, int w, int h) {
			super.setBounds(x, y, w, h);
			sp.setBounds(0, y + 16, w, h - 23);
			sp.revalidate();
			jt.setBounds(0, 0, w, 20);
		}

		public String getSelectedValue() {
			return (si);
		}

		public void setSelectedItem(String s) {
			jl.setSelectedValue(s, true);
		}

	}
}