/*

 * Copyright (c) 1998, 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.metal;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.plaf.*;

import javax.swing.border.*;

import javax.swing.plaf.basic.*;

import java.io.Serializable;

import java.beans.*;

/**

 * Metal UI for JComboBox

 * <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}.

 *

 * @see MetalComboBoxEditor

 * @see MetalComboBoxButton

 * @author Tom Santos

 */

@SuppressWarnings("serial") // Same-version serialization only

public class MetalComboBoxUI extends BasicComboBoxUI {

    /**

     * Constructs an instance of {@code MetalComboBoxUI}.

     *

     * @param c a component

     * @return an instance of {@code MetalComboBoxUI}

     */

    public static ComponentUI createUI(JComponent c) {

        return new MetalComboBoxUI();

    }

    public void paint(Graphics g, JComponent c) {

        if (MetalLookAndFeel.usingOcean()) {

            super.paint(g, c);

        }

    }

    /**

     * If necessary paints the currently selected item.

     *

     * @param g Graphics to paint to

     * @param bounds Region to paint current value to

     * @param hasFocus whether or not the JComboBox has focus

     * @throws NullPointerException if any of the arguments are null.

     * @since 1.5

     */

    public void paintCurrentValue(Graphics g, Rectangle bounds,

                                  boolean hasFocus) {

        // This is really only called if we're using ocean.

        if (MetalLookAndFeel.usingOcean()) {

            bounds.x += 2;

            bounds.width -= 3;

            if (arrowButton != null) {

                Insets buttonInsets = arrowButton.getInsets();

                bounds.y += buttonInsets.top;

                bounds.height -= (buttonInsets.top + buttonInsets.bottom);

            }

            else {

                bounds.y += 2;

                bounds.height -= 4;

            }

            super.paintCurrentValue(g, bounds, hasFocus);

        }

        else if (g == null || bounds == null) {

            throw new NullPointerException(

                "Must supply a non-null Graphics and Rectangle");

        }

    }

    /**

     * If necessary paints the background of the currently selected item.

     *

     * @param g Graphics to paint to

     * @param bounds Region to paint background to

     * @param hasFocus whether or not the JComboBox has focus

     * @throws NullPointerException if any of the arguments are null.

     * @since 1.5

     */

    public void paintCurrentValueBackground(Graphics g, Rectangle bounds,

                                            boolean hasFocus) {

        // This is really only called if we're using ocean.

        if (MetalLookAndFeel.usingOcean()) {

            g.setColor(MetalLookAndFeel.getControlDarkShadow());

            g.drawRect(bounds.x, bounds.y, bounds.width, bounds.height - 1);

            g.setColor(MetalLookAndFeel.getControlShadow());

            g.drawRect(bounds.x + 1, bounds.y + 1, bounds.width - 2,

                       bounds.height - 3);

            if (hasFocus && !isPopupVisible(comboBox) &&

                    arrowButton != null) {

                g.setColor(listBox.getSelectionBackground());

                Insets buttonInsets = arrowButton.getInsets();

                if (buttonInsets.top > 2) {

                    g.fillRect(bounds.x + 2, bounds.y + 2, bounds.width - 3,

                               buttonInsets.top - 2);

                }

                if (buttonInsets.bottom > 2) {

                    g.fillRect(bounds.x + 2, bounds.y + bounds.height -

                               buttonInsets.bottom, bounds.width - 3,

                               buttonInsets.bottom - 2);

                }

            }

        }

        else if (g == null || bounds == null) {

            throw new NullPointerException(

                "Must supply a non-null Graphics and Rectangle");

        }

    }

    /**

     * Returns the baseline.

     *

     * @throws NullPointerException {@inheritDoc}

     * @throws IllegalArgumentException {@inheritDoc}

     * @see javax.swing.JComponent#getBaseline(int, int)

     * @since 1.6

     */

    public int getBaseline(JComponent c, int width, int height) {

        int baseline;

        if (MetalLookAndFeel.usingOcean() && height >= 4) {

            height -= 4;

            baseline = super.getBaseline(c, width, height);

            if (baseline >= 0) {

                baseline += 2;

            }

        }

        else {

            baseline = super.getBaseline(c, width, height);

        }

        return baseline;

    }

    protected ComboBoxEditor createEditor() {

        return new MetalComboBoxEditor.UIResource();

    }

    protected ComboPopup createPopup() {

        return super.createPopup();

    }

    protected JButton createArrowButton() {

        boolean iconOnly = (comboBox.isEditable() ||

                            MetalLookAndFeel.usingOcean());

        JButton button = new MetalComboBoxButton( comboBox,

                                                  new MetalComboBoxIcon(),

                                                  iconOnly,

                                                  currentValuePane,

                                                  listBox );

        button.setMargin( new Insets( 0, 1, 1, 3 ) );

        if (MetalLookAndFeel.usingOcean()) {

            // Disabled rollover effect.

            button.putClientProperty(MetalBorders.NO_BUTTON_ROLLOVER,

                                     Boolean.TRUE);

        }

        updateButtonForOcean(button);

        return button;

    }

    /**

     * Resets the necessary state on the ComboBoxButton for ocean.

     */

    private void updateButtonForOcean(JButton button) {

        if (MetalLookAndFeel.usingOcean()) {

            // Ocean renders the focus in a different way, this

            // would be redundant.

            button.setFocusPainted(comboBox.isEditable());

        }

    }

    public PropertyChangeListener createPropertyChangeListener() {

        return new MetalPropertyChangeListener();

    }

    /**

     * This class should be treated as a "protected" inner class.

     * Instantiate it only within subclasses of {@code MetalComboBoxUI}.

     */

    public class MetalPropertyChangeListener extends BasicComboBoxUI.PropertyChangeHandler {

        public void propertyChange(PropertyChangeEvent e) {

            super.propertyChange( e );

            String propertyName = e.getPropertyName();

            if ( propertyName == "editable" ) {

                if(arrowButton instanceof MetalComboBoxButton) {

                            MetalComboBoxButton button = (MetalComboBoxButton)arrowButton;

                            button.setIconOnly( comboBox.isEditable() ||

                                    MetalLookAndFeel.usingOcean() );

                }

                        comboBox.repaint();

                updateButtonForOcean(arrowButton);

            } else if ( propertyName == "background" ) {

                Color color = (Color)e.getNewValue();

                arrowButton.setBackground(color);

                listBox.setBackground(color);

            } else if ( propertyName == "foreground" ) {

                Color color = (Color)e.getNewValue();

                arrowButton.setForeground(color);

                listBox.setForeground(color);

            }

        }

    }

    /**

     * As of Java 2 platform v1.4 this method is no longer used. Do not call or

     * override. All the functionality of this method is in the

     * MetalPropertyChangeListener.

     *

     * @param e an instance of {@code PropertyChangeEvent}

     * @deprecated As of Java 2 platform v1.4.

     */

    @Deprecated

    protected void editablePropertyChanged( PropertyChangeEvent e ) { }

    protected LayoutManager createLayoutManager() {

        return new MetalComboBoxLayoutManager();

    }

    /**

     * This class should be treated as a "protected" inner class.

     * Instantiate it only within subclasses of {@code MetalComboBoxUI}.

     */

    public class MetalComboBoxLayoutManager extends BasicComboBoxUI.ComboBoxLayoutManager {

        public void layoutContainer( Container parent ) {

            layoutComboBox( parent, this );

        }

        /**

         * Lays out the parent container.

         *

         * @param parent a container

         */

        public void superLayout( Container parent ) {

            super.layoutContainer( parent );

        }

    }

    /**

     * Lays out the {@code JComboBox} in the {@code parent} container.

     *

     * @param parent a container

     * @param manager an instance of {@code MetalComboBoxLayoutManager}

     */

    // This is here because of a bug in the compiler.

    // When a protected-inner-class-savvy compiler comes out we

    // should move this into MetalComboBoxLayoutManager.

    public void layoutComboBox( Container parent, MetalComboBoxLayoutManager manager ) {

        if (comboBox.isEditable() && !MetalLookAndFeel.usingOcean()) {

            manager.superLayout( parent );

            return;

        }

        if (arrowButton != null) {

            if (MetalLookAndFeel.usingOcean() ) {

                Insets insets = comboBox.getInsets();

                int buttonWidth = arrowButton.getMinimumSize().width;

                arrowButton.setBounds(MetalUtils.isLeftToRight(comboBox)

                                ? (comboBox.getWidth() - insets.right - buttonWidth)

                                : insets.left,

                            insets.top, buttonWidth,

                            comboBox.getHeight() - insets.top - insets.bottom);

            }

            else {

                Insets insets = comboBox.getInsets();

                int width = comboBox.getWidth();

                int height = comboBox.getHeight();

                arrowButton.setBounds( insets.left, insets.top,

                                       width - (insets.left + insets.right),

                                       height - (insets.top + insets.bottom) );

            }

        }

        if (editor != null && MetalLookAndFeel.usingOcean()) {

            Rectangle cvb = rectangleForCurrentValue();

            editor.setBounds(cvb);

        }

    }

    /**

     * As of Java 2 platform v1.4 this method is no

     * longer used.

     *

     * @deprecated As of Java 2 platform v1.4.

     */

    @Deprecated

    protected void removeListeners() {

        if ( propertyChangeListener != null ) {

            comboBox.removePropertyChangeListener( propertyChangeListener );

        }

    }

    // These two methods were overloaded and made public. This was probably a

    // mistake in the implementation. The functionality that they used to

    // provide is no longer necessary and should be removed. However,

    // removing them will create an uncompatible API change.

    public void configureEditor() {

        super.configureEditor();

    }

    public void unconfigureEditor() {

        super.unconfigureEditor();

    }

    public Dimension getMinimumSize( JComponent c ) {

        if ( !isMinimumSizeDirty ) {

            return new Dimension( cachedMinimumSize );

        }

        Dimension size = null;

        if ( !comboBox.isEditable() &&

             arrowButton != null) {

            Insets buttonInsets = arrowButton.getInsets();

            Insets insets = comboBox.getInsets();

            size = getDisplaySize();

            size.width += insets.left + insets.right;

            size.width += buttonInsets.right;

            size.width += arrowButton.getMinimumSize().width;

            size.height += insets.top + insets.bottom;

            size.height += buttonInsets.top + buttonInsets.bottom;

        }

        else if ( comboBox.isEditable() &&

                  arrowButton != null &&

                  editor != null ) {

            size = super.getMinimumSize( c );

            Insets margin = arrowButton.getMargin();

            size.height += margin.top + margin.bottom;

            size.width += margin.left + margin.right;

        }

        else {

            size = super.getMinimumSize( c );

        }

        cachedMinimumSize.setSize( size.width, size.height );

        isMinimumSizeDirty = false;

        return new Dimension( cachedMinimumSize );

    }

    /**

     * This class should be treated as a "protected" inner class.

     * Instantiate it only within subclasses of {@code MetalComboBoxUI}.

     *

     * This class is now obsolete and doesn't do anything and

     * is only included for backwards API compatibility. Do not call or

     * override.

     *

     * @deprecated As of Java 2 platform v1.4.

     */

    @Deprecated

    public class MetalComboPopup extends BasicComboPopup {

        /**

         * Constructs a new instance of {@code MetalComboPopup}.

         *

         * @param cBox an instance of {@code JComboBox}

         */

            super( cBox );

        }

        // This method was overloaded and made public. This was probably

        // mistake in the implementation. The functionality that they used to

        // provide is no longer necessary and should be removed. However,

        // removing them will create an uncompatible API change.

        public void delegateFocus(MouseEvent e) {

            super.delegateFocus(e);

        }

    }

}