/*

 * 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

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 */

package javax.swing.plaf.basic;

import javax.swing.*;

import javax.swing.colorchooser.*;

import javax.swing.event.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import java.awt.*;

import java.awt.event.*;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import sun.swing.DefaultLookup;

/**

 * Provides the basic look and feel for a JColorChooser.

 *

 * @author Tom Santos

 * @author Steve Wilson

 */

public class BasicColorChooserUI extends ColorChooserUI

{

    /**

     * JColorChooser this BasicColorChooserUI is installed on.

     *

     * @since 1.5

     */

    protected JColorChooser chooser;

    JTabbedPane tabbedPane;

    JPanel singlePanel;

    JPanel previewPanelHolder;

    JComponent previewPanel;

    boolean isMultiPanel = false;

    private static TransferHandler defaultTransferHandler = new ColorTransferHandler();

    /**

     * The array of default color choosers.

     */

    protected AbstractColorChooserPanel[] defaultChoosers;

    /**

     * The instance of {@code ChangeListener}.

     */

    protected ChangeListener previewListener;

    /**

     * The instance of {@code PropertyChangeListener}.

     */

    protected PropertyChangeListener propertyChangeListener;

    private Handler handler;

    /**

     * Returns a new instance of {@code BasicColorChooserUI}.

     *

     * @param c a component

     * @return a new instance of {@code BasicColorChooserUI}

     */

    public static ComponentUI createUI(JComponent c) {

        return new BasicColorChooserUI();

    }

    /**

     * Returns an array of default color choosers.

     *

     * @return an array of default color choosers

     */

    protected AbstractColorChooserPanel[] createDefaultChoosers() {

        AbstractColorChooserPanel[] panels = ColorChooserComponentFactory.getDefaultChooserPanels();

        return panels;

    }

    /**

     * Uninstalls default color choosers.

     */

    protected void uninstallDefaultChoosers() {

        AbstractColorChooserPanel[] choosers = chooser.getChooserPanels();

        for( int i = 0 ; i < choosers.length; i++) {

            chooser.removeChooserPanel( choosers[i] );

        }

    }

    public void installUI( JComponent c ) {

        chooser = (JColorChooser)c;

        super.installUI( c );

        installDefaults();

        installListeners();

        tabbedPane = new JTabbedPane();

        tabbedPane.setName("ColorChooser.tabPane");

        tabbedPane.setInheritsPopupMenu(true);

        tabbedPane.getAccessibleContext().setAccessibleDescription(tabbedPane.getName());

        singlePanel = new JPanel(new CenterLayout());

        singlePanel.setName("ColorChooser.panel");

        singlePanel.setInheritsPopupMenu(true);

        chooser.setLayout( new BorderLayout() );

        defaultChoosers = createDefaultChoosers();

        chooser.setChooserPanels(defaultChoosers);

        previewPanelHolder = new JPanel(new CenterLayout());

        previewPanelHolder.setName("ColorChooser.previewPanelHolder");

        if (DefaultLookup.getBoolean(chooser, this,

                                  "ColorChooser.showPreviewPanelText", true)) {

            String previewString = UIManager.getString(

                "ColorChooser.previewText", chooser.getLocale());

            previewPanelHolder.setBorder(new TitledBorder(previewString));

        }

        previewPanelHolder.setInheritsPopupMenu(true);

        installPreviewPanel();

        chooser.applyComponentOrientation(c.getComponentOrientation());

    }

    public void uninstallUI( JComponent c ) {

        chooser.remove(tabbedPane);

        chooser.remove(singlePanel);

        chooser.remove(previewPanelHolder);

        uninstallDefaultChoosers();

        uninstallListeners();

        uninstallPreviewPanel();

        uninstallDefaults();

        previewPanelHolder = null;

        previewPanel = null;

        defaultChoosers = null;

        chooser = null;

        tabbedPane = null;

        handler = null;

    }

    /**

     * Installs preview panel.

     */

    protected void installPreviewPanel() {

        JComponent previewPanel = this.chooser.getPreviewPanel();

        if (previewPanel == null) {

            previewPanel = ColorChooserComponentFactory.getPreviewPanel();

        }

        else if (JPanel.class.equals(previewPanel.getClass()) && (0 == previewPanel.getComponentCount())) {

            previewPanel = null;

        }

        this.previewPanel = previewPanel;

        if (previewPanel != null) {

            chooser.add(previewPanelHolder, BorderLayout.SOUTH);

            previewPanel.setForeground(chooser.getColor());

            previewPanelHolder.add(previewPanel);

            previewPanel.addMouseListener(getHandler());

            previewPanel.setInheritsPopupMenu(true);

        }

    }

    /**

     * Removes installed preview panel from the UI delegate.

     *

     * @since 1.7

     */

    protected void uninstallPreviewPanel() {

        if (this.previewPanel != null) {

            this.previewPanel.removeMouseListener(getHandler());

            this.previewPanelHolder.remove(this.previewPanel);

        }

        this.chooser.remove(this.previewPanelHolder);

    }

    /**

     * Installs default properties.

     */

    protected void installDefaults() {

        LookAndFeel.installColorsAndFont(chooser, "ColorChooser.background",

                                              "ColorChooser.foreground",

                                              "ColorChooser.font");

        LookAndFeel.installProperty(chooser, "opaque", Boolean.TRUE);

        TransferHandler th = chooser.getTransferHandler();

        if (th == null || th instanceof UIResource) {

            chooser.setTransferHandler(defaultTransferHandler);

        }

    }

    /**

     * Uninstalls default properties.

     */

    protected void uninstallDefaults() {

        if (chooser.getTransferHandler() instanceof UIResource) {

            chooser.setTransferHandler(null);

        }

    }

    /**

     * Registers listeners.

     */

    protected void installListeners() {

        propertyChangeListener = createPropertyChangeListener();

        chooser.addPropertyChangeListener(propertyChangeListener);

        previewListener = getHandler();

        chooser.getSelectionModel().addChangeListener(previewListener);

    }

    private Handler getHandler() {

        if (handler == null) {

            handler = new Handler();

        }

        return handler;

    }

    /**

     * Returns an instance of {@code PropertyChangeListener}.

     *

     * @return an instance of {@code PropertyChangeListener}

     */

    protected PropertyChangeListener createPropertyChangeListener() {

        return getHandler();

    }

    /**

     * Unregisters listeners.

     */

    protected void uninstallListeners() {

        chooser.removePropertyChangeListener( propertyChangeListener );

        chooser.getSelectionModel().removeChangeListener(previewListener);

        previewListener = null;

    }

    private void selectionChanged(ColorSelectionModel model) {

        JComponent previewPanel = this.chooser.getPreviewPanel();

        if (previewPanel != null) {

            previewPanel.setForeground(model.getSelectedColor());

            previewPanel.repaint();

        }

        AbstractColorChooserPanel[] panels = this.chooser.getChooserPanels();

        if (panels != null) {

            for (AbstractColorChooserPanel panel : panels) {

                if (panel != null) {

                    panel.updateChooser();

                }

            }

        }

    }

    private class Handler implements ChangeListener, MouseListener,

            PropertyChangeListener {

        //

        // ChangeListener

        //

        public void stateChanged(ChangeEvent evt) {

            selectionChanged((ColorSelectionModel) evt.getSource());

        }

        //

        // MouseListener

        public void mousePressed(MouseEvent evt) {

            if (chooser.getDragEnabled()) {

                TransferHandler th = chooser.getTransferHandler();

                th.exportAsDrag(chooser, evt, TransferHandler.COPY);

            }

        }

        public void mouseReleased(MouseEvent evt) {}

        public void mouseClicked(MouseEvent evt) {}

        public void mouseEntered(MouseEvent evt) {}

        public void mouseExited(MouseEvent evt) {}

        //

        // PropertyChangeListener

        //

        public void propertyChange(PropertyChangeEvent evt) {

            String prop = evt.getPropertyName();

            if (prop == JColorChooser.CHOOSER_PANELS_PROPERTY) {

                AbstractColorChooserPanel[] oldPanels =

                    (AbstractColorChooserPanel[])evt.getOldValue();

                AbstractColorChooserPanel[] newPanels =

                    (AbstractColorChooserPanel[])evt.getNewValue();

                for (int i = 0; i < oldPanels.length; i++) {  // remove old panels

                   Container wrapper = oldPanels[i].getParent();

                    if (wrapper != null) {

                      Container parent = wrapper.getParent();

                      if (parent != null)

                          parent.remove(wrapper);  // remove from hierarchy

                      oldPanels[i].uninstallChooserPanel(chooser); // uninstall

                    }

                }

                int numNewPanels = newPanels.length;

                if (numNewPanels == 0) {  // removed all panels and added none

                    chooser.remove(tabbedPane);

                    return;

                }

                else if (numNewPanels == 1) {  // one panel case

                    chooser.remove(tabbedPane);

                    JPanel centerWrapper = new JPanel( new CenterLayout() );

                    centerWrapper.setInheritsPopupMenu(true);

                    centerWrapper.add(newPanels[0]);

                    singlePanel.add(centerWrapper, BorderLayout.CENTER);

                    chooser.add(singlePanel);

                }

                else {   // multi-panel case

                    if ( oldPanels.length < 2 ) {// moving from single to multiple

                        chooser.remove(singlePanel);

                        chooser.add(tabbedPane, BorderLayout.CENTER);

                    }

                    for (int i = 0; i < newPanels.length; i++) {

                        JPanel centerWrapper = new JPanel( new CenterLayout() );

                        centerWrapper.setInheritsPopupMenu(true);

                        String name = newPanels[i].getDisplayName();

                        int mnemonic = newPanels[i].getMnemonic();

                        centerWrapper.add(newPanels[i]);

                        tabbedPane.addTab(name, centerWrapper);

                        if (mnemonic > 0) {

                            tabbedPane.setMnemonicAt(i, mnemonic);

                            int index = newPanels[i].getDisplayedMnemonicIndex();

                            if (index >= 0) {

                                tabbedPane.setDisplayedMnemonicIndexAt(i, index);

                            }

                        }

                    }

                }

                chooser.applyComponentOrientation(chooser.getComponentOrientation());

                for (int i = 0; i < newPanels.length; i++) {

                    newPanels[i].installChooserPanel(chooser);

                }

            }

            else if (prop == JColorChooser.PREVIEW_PANEL_PROPERTY) {

                uninstallPreviewPanel();

                installPreviewPanel();

            }

            else if (prop == JColorChooser.SELECTION_MODEL_PROPERTY) {

                ColorSelectionModel oldModel = (ColorSelectionModel) evt.getOldValue();

                oldModel.removeChangeListener(previewListener);

                ColorSelectionModel newModel = (ColorSelectionModel) evt.getNewValue();

                newModel.addChangeListener(previewListener);

                selectionChanged(newModel);

            }

            else if (prop == "componentOrientation") {

                ComponentOrientation o =

                    (ComponentOrientation)evt.getNewValue();

                JColorChooser cc = (JColorChooser)evt.getSource();

                if (o != (ComponentOrientation)evt.getOldValue()) {

                    cc.applyComponentOrientation(o);

                    cc.updateUI();

                }

            }

        }

    }

    /**

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

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

     */

    public class PropertyHandler implements PropertyChangeListener {

        public void propertyChange(PropertyChangeEvent e) {

            getHandler().propertyChange(e);

        }

    }

    @SuppressWarnings("serial") // JDK-implementation class

    static class ColorTransferHandler extends TransferHandler implements UIResource {

        ColorTransferHandler() {

            super("color");

        }

    }

}