/*
 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing.plaf.basic;

import javax.swing.*;
import javax.swing.plaf.UIResource;

import java.awt.Graphics;
import java.awt.Color;
import java.awt.Component;
import java.awt.Polygon;
import java.io.Serializable;

Factory object that can vend Icons appropriate for the basic L & F.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans
has been added to the java.beans package. Please see XMLEncoder. 
Author:
David Kloba, Georges Saab/**
 * Factory object that can vend Icons appropriate for the basic L & F.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author David Kloba
 * @author Georges Saab
 */
@SuppressWarnings("serial") // Same-version serialization only
public class BasicIconFactory implements Serializable
{
    private static Icon frame_icon;
    private static Icon checkBoxIcon;
    private static Icon radioButtonIcon;
    private static Icon checkBoxMenuItemIcon;
    private static Icon radioButtonMenuItemIcon;
    private static Icon menuItemCheckIcon;
    private static Icon menuItemArrowIcon;
    private static Icon menuArrowIcon;

    
Constructs a BasicIconFactory. /**
     * Constructs a {@code BasicIconFactory}.
     */
    public BasicIconFactory() {}

    
Returns a menu item check icon.
Returns:
a menu item check icon/**
     * Returns a menu item check icon.
     *
     * @return a menu item check icon
     */
    public static Icon getMenuItemCheckIcon() {
        if (menuItemCheckIcon == null) {
            menuItemCheckIcon = new MenuItemCheckIcon();
        }
        return menuItemCheckIcon;
    }

    
Returns a menu item arrow icon.
Returns:
a menu item arrow icon/**
     * Returns a menu item arrow icon.
     *
     * @return a menu item arrow icon
     */
    public static Icon getMenuItemArrowIcon() {
        if (menuItemArrowIcon == null) {
            menuItemArrowIcon = new MenuItemArrowIcon();
        }
        return menuItemArrowIcon;
    }

    
Returns a menu arrow icon.
Returns:
a menu arrow icon/**
     * Returns a menu arrow icon.
     *
     * @return a menu arrow icon
     */
    public static Icon getMenuArrowIcon() {
        if (menuArrowIcon == null) {
            menuArrowIcon = new MenuArrowIcon();
        }
        return menuArrowIcon;
    }

    
Returns a check box icon.
Returns:
a check box icon/**
     * Returns a check box icon.
     *
     * @return a check box icon
     */
    public static Icon getCheckBoxIcon() {
        if (checkBoxIcon == null) {
            checkBoxIcon = new CheckBoxIcon();
        }
        return checkBoxIcon;
    }

    
Returns a radio button icon.
Returns:
a radio button icon/**
     * Returns a radio button icon.
     *
     * @return a radio button icon
     */
    public static Icon getRadioButtonIcon() {
        if (radioButtonIcon == null) {
            radioButtonIcon = new RadioButtonIcon();
        }
        return radioButtonIcon;
    }

    
Returns a check box menu item icon.
Returns:
a check box menu item icon/**
     * Returns a check box menu item icon.
     *
     * @return a check box menu item icon
     */
    public static Icon getCheckBoxMenuItemIcon() {
        if (checkBoxMenuItemIcon == null) {
            checkBoxMenuItemIcon = new CheckBoxMenuItemIcon();
        }
        return checkBoxMenuItemIcon;
    }

    
Returns a radio button menu item icon.
Returns:
a radio button menu item icon/**
     * Returns a radio button menu item icon.
     *
     * @return a radio button menu item icon
     */
    public static Icon getRadioButtonMenuItemIcon() {
        if (radioButtonMenuItemIcon == null) {
            radioButtonMenuItemIcon = new RadioButtonMenuItemIcon();
        }
        return radioButtonMenuItemIcon;
    }

    
Returns an empty frame icon.
Returns:
an empty frame icon/**
     * Returns an empty frame icon.
     *
     * @return an empty frame icon
     */
    public static Icon createEmptyFrameIcon() {
        if(frame_icon == null)
            frame_icon = new EmptyFrameIcon();
        return frame_icon;
    }

    private static class EmptyFrameIcon implements Icon, Serializable {
        int height = 16;
        int width = 14;
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }
        public int getIconWidth() { return width; }
        public int getIconHeight() { return height; }
    };

    private static class CheckBoxIcon implements Icon, Serializable
    {
        static final int csize = 13;
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }

        public int getIconWidth() {
            return csize;
        }

        public int getIconHeight() {
            return csize;
        }
    }

    private static class RadioButtonIcon implements Icon, UIResource, Serializable
    {
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }

        public int getIconWidth() {
            return 13;
        }

        public int getIconHeight() {
            return 13;
        }
    } // end class RadioButtonIcon


    private static class CheckBoxMenuItemIcon implements Icon, UIResource, Serializable
    {
        public void paintIcon(Component c, Graphics g, int x, int y) {
            AbstractButton b = (AbstractButton) c;
            ButtonModel model = b.getModel();
            boolean isSelected = model.isSelected();
            if (isSelected) {
                g.drawLine(x+7, y+1, x+7, y+3);
                g.drawLine(x+6, y+2, x+6, y+4);
                g.drawLine(x+5, y+3, x+5, y+5);
                g.drawLine(x+4, y+4, x+4, y+6);
                g.drawLine(x+3, y+5, x+3, y+7);
                g.drawLine(x+2, y+4, x+2, y+6);
                g.drawLine(x+1, y+3, x+1, y+5);
            }
        }
        public int getIconWidth() { return 9; }
        public int getIconHeight() { return 9; }

    } // End class CheckBoxMenuItemIcon


    private static class RadioButtonMenuItemIcon implements Icon, UIResource, Serializable
    {
        public void paintIcon(Component c, Graphics g, int x, int y) {
            AbstractButton b = (AbstractButton) c;
            ButtonModel model = b.getModel();
            if (b.isSelected() == true) {
                g.fillOval(x+1, y+1, getIconWidth(), getIconHeight());
            }
        }
        public int getIconWidth() { return 6; }
        public int getIconHeight() { return 6; }

    } // End class RadioButtonMenuItemIcon


    private static class MenuItemCheckIcon implements Icon, UIResource, Serializable{
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }
        public int getIconWidth() { return 9; }
        public int getIconHeight() { return 9; }

    } // End class MenuItemCheckIcon

    private static class MenuItemArrowIcon implements Icon, UIResource, Serializable {
        public void paintIcon(Component c, Graphics g, int x, int y) {
        }
        public int getIconWidth() { return 4; }
        public int getIconHeight() { return 8; }

    } // End class MenuItemArrowIcon

    private static class MenuArrowIcon implements Icon, UIResource, Serializable {
        public void paintIcon(Component c, Graphics g, int x, int y) {
            Polygon p = new Polygon();
            p.addPoint(x, y);
            p.addPoint(x+getIconWidth(), y+getIconHeight()/2);
            p.addPoint(x, y+getIconHeight());
            g.fillPolygon(p);

        }
        public int getIconWidth() { return 4; }
        public int getIconHeight() { return 8; }
    } // End class MenuArrowIcon
}