/*
 * @(#)FloatingTextField.java  2.0  2006-01-014
 *
 * Copyright (c) 1996-2006 by the original authors of JHotDraw
 * and all its contributors.
 * All rights reserved.
 *
 * The copyright of this software is owned by the authors and  
 * contributors of the JHotDraw project ("the copyright holders").  
 * You may not use, copy or modify this software, except in  
 * accordance with the license agreement you entered into with  
 * the copyright holders. For details see accompanying license terms. 
 */

package org.jhotdraw.draw;

import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;
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 org.jhotdraw.draw.TextFigure
 *
 * @author Werner Randelshofer
 * @version 2.0 2006-01-14 Changed to support double precision coordinates.
 * <br>1.0 2003-12-01 Derived from JHotDraw 5.4b1.
 */
public  class FloatingTextField {
    
    private JTextField   editWidget;
    private DrawingView   view;
    
    public FloatingTextField() {
        editWidget = new JTextField(20);
    }
    
    /**
     * Creates the overlay for the given Component.
     */
    public void createOverlay(DrawingView view) {
        createOverlay(view, null);
    }
    
    public void requestFocus() {
        editWidget.requestFocus();
    }
    
    /**
     * Creates the overlay for the given Container using a
     * specific font.
     */
    public void createOverlay(DrawingView view, TextHolderFigure figure) {
        view.getComponent().add(editWidget, 0);
        Font f = figure.getFont();
        // FIXME - Should scale with fractional value!
        f = f.deriveFont(f.getStyle(), (float) (figure.getFontSize() * view.getScaleFactor()));
        editWidget.setFont(f);
        editWidget.setForeground(figure.getTextColor());
        editWidget.setBackground(figure.getFillColor());
        this.view = view;
    }
    
    public Insets getInsets() {
        return editWidget.getInsets();
    }
    
    /**
     * Adds an action listener
     */
    public void addActionListener(ActionListener listener) {
        editWidget.addActionListener(listener);
    }
    
    /**
     * Remove an action listener
     */
    public void removeActionListener(ActionListener listener) {
        editWidget.removeActionListener(listener);
    }
    
    /**
     * Positions the overlay.
     */
    public void setBounds(Rectangle r, String text) {
        editWidget.setText(text);
        editWidget.setBounds(r.x, r.y, r.width, r.height);
        editWidget.setVisible(true);
        editWidget.selectAll();
        editWidget.requestFocus();
    }
    
    /**
     * Gets the text contents of the overlay.
     */
    public String getText() {
        return editWidget.getText();
    }
    
    /**
     * Gets the preferred size of the overlay.
     */
    public Dimension getPreferredSize(int cols) {
        editWidget.setColumns(cols);
        return editWidget.getPreferredSize();
    }
    
    /**
     * Removes the overlay.
     */
    public void endOverlay() {
        view.getComponent().requestFocus();
        if (editWidget != null) {
            editWidget.setVisible(false);
            view.getComponent().remove(editWidget);
            
            Rectangle bounds = editWidget.getBounds();
            view.getComponent().repaint(bounds.x, bounds.y, bounds.width, bounds.height);
        }
    }
}