/*
 * @(#)FloatingTextField.java
 *
 * Project:		JHotdraw - a GUI framework for technical drawings
 *				http://www.jhotdraw.org
 *				http://jhotdraw.sourceforge.net
 * Copyright:	© by the original author(s) and all contributors
 * License:		Lesser GNU Public License (LGPL)
 *				http://www.opensource.org/licenses/lgpl-license.html
 */

package CH.ifa.draw.util;

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

/**
 * A text field overlay that is used to edit a TextFigure.
 * A FloatingTextField requires a two step initialization:
 * In a first step the overlay is created and in a
 * second step it can be positioned.
 *
 * @see CH.ifa.draw.figures.TextFigure
 *
 * @version <$CURRENT_VERSION$>
 */
public  class FloatingTextField {

    private JTextField   fEditWidget;
    private Container   fContainer;

    public FloatingTextField() {
        fEditWidget = new JTextField(20);
    }

    /**
     * Creates the overlay for the given Component.
     */
    public void createOverlay(Container container) {
        createOverlay(container, null);
    }

    /**
     * Creates the overlay for the given Container using a
     * specific font.
     */
    public void createOverlay(Container container, Font font) {
        container.add(fEditWidget, 0);
        if (font != null) {
            fEditWidget.setFont(font);
        }
        fContainer = container;
    }

    /**
     * Adds an action listener
     */
	public void addActionListener(ActionListener listener) {
	    fEditWidget.addActionListener(listener);
	}

    /**
     * Remove an action listener
     */
	public void removeActionListener(ActionListener listener) {
	    fEditWidget.removeActionListener(listener);
	}

    /**
     * Positions the overlay.
     */
    public void setBounds(Rectangle r, String text) {
	    fEditWidget.setText(text);
        fEditWidget.setBounds(r.x, r.y, r.width, r.height);
        fEditWidget.setVisible(true);
	    fEditWidget.selectAll();
	    fEditWidget.requestFocus();
    }

    /**
     * Gets the text contents of the overlay.
     */
    public String getText() {
        return fEditWidget.getText();
    }

    /**
     * Gets the preferred size of the overlay.
     */
    public Dimension getPreferredSize(int cols) {
        fEditWidget.setColumns(cols);
        return fEditWidget.getPreferredSize();
    }

    /**
     * Removes the overlay.
     */
    public void endOverlay() {
	    fContainer.requestFocus();
	    if (fEditWidget != null) {
		    fEditWidget.setVisible(false);
		    fContainer.remove(fEditWidget);

		    Rectangle bounds = fEditWidget.getBounds();
		    fContainer.repaint(bounds.x, bounds.y, bounds.width, bounds.height);
	    }
    }
}