/*

 * Copyright (c) 2002, 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.synth;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import javax.swing.plaf.basic.*;

import java.awt.*;

import java.beans.PropertyChangeListener;

import java.beans.PropertyChangeEvent;

/**

 * Provides the Synth L&F UI delegate for

 * {@link javax.swing.JList}.

 *

 * @author Scott Violet

 * @since 1.7

 */

public class SynthListUI extends BasicListUI

                         implements PropertyChangeListener, SynthUI {

    private SynthStyle style;

    private boolean useListColors;

    private boolean useUIBorder;

    /**

     * Creates a new UI object for the given component.

     *

     * @param list component to create UI object for

     * @return the UI object

     */

    public static ComponentUI createUI(JComponent list) {

        return new SynthListUI();

    }

    /**

     * Notifies this UI delegate to repaint the specified component.

     * This method paints the component background, then calls

     * the {@link #paint} method.

     *

     * <p>In general, this method does not need to be overridden by subclasses.

     * All Look and Feel rendering code should reside in the {@code paint} method.

     *

     * @param g the {@code Graphics} object used for painting

     * @param c the component being painted

     * @see #paint

     */

    @Override

    public void update(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);

        context.getPainter().paintListBackground(context,

                          g, 0, 0, c.getWidth(), c.getHeight());

        context.dispose();

        paint(g, c);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void paintBorder(SynthContext context, Graphics g, int x,

                            int y, int w, int h) {

        context.getPainter().paintListBorder(context, g, x, y, w, h);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void installListeners() {

        super.installListeners();

        list.addPropertyChangeListener(this);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void propertyChange(PropertyChangeEvent e) {

        if (SynthLookAndFeel.shouldUpdateStyle(e)) {

            updateStyle((JList)e.getSource());

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void uninstallListeners() {

        super.uninstallListeners();

        list.removePropertyChangeListener(this);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void installDefaults() {

        if (list.getCellRenderer() == null ||

                 (list.getCellRenderer() instanceof UIResource)) {

            list.setCellRenderer(new SynthListCellRenderer());

        }

        updateStyle(list);

    }

    private void updateStyle(JComponent c) {

        SynthContext context = getContext(list, ENABLED);

        SynthStyle oldStyle = style;

        style = SynthLookAndFeel.updateStyle(context, this);

        if (style != oldStyle) {

            context.setComponentState(SELECTED);

            Color sbg = list.getSelectionBackground();

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

                list.setSelectionBackground(style.getColor(

                                 context, ColorType.TEXT_BACKGROUND));

            }

            Color sfg = list.getSelectionForeground();

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

                list.setSelectionForeground(style.getColor(

                                 context, ColorType.TEXT_FOREGROUND));

            }

            useListColors = style.getBoolean(context,

                                  "List.rendererUseListColors", true);

            useUIBorder = style.getBoolean(context,

                                  "List.rendererUseUIBorder", true);

            int height = style.getInt(context, "List.cellHeight", -1);

            if (height != -1) {

                list.setFixedCellHeight(height);

            }

            if (oldStyle != null) {

                uninstallKeyboardActions();

                installKeyboardActions();

            }

        }

        context.dispose();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void uninstallDefaults() {

        super.uninstallDefaults();

        SynthContext context = getContext(list, ENABLED);

        style.uninstallDefaults(context);

        context.dispose();

        style = null;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public SynthContext getContext(JComponent c) {

        return getContext(c, getComponentState(c));

    }

    private SynthContext getContext(JComponent c, int state) {

        return SynthContext.getContext(c, style, state);

    }

    private int getComponentState(JComponent c) {

        return SynthLookAndFeel.getComponentState(c);

    }

    @SuppressWarnings("serial") // Superclass is not serializable across versions

    private class SynthListCellRenderer extends DefaultListCellRenderer.UIResource {

        @Override public String getName() {

            return "List.cellRenderer";

        }

        @Override public void setBorder(Border b) {

            if (useUIBorder || b instanceof SynthBorder) {

                super.setBorder(b);

            }

        }

        @Override public Component getListCellRendererComponent(JList<?> list, Object value,

                  int index, boolean isSelected, boolean cellHasFocus) {

            if (!useListColors && (isSelected || cellHasFocus)) {

                SynthLookAndFeel.setSelectedUI((SynthLabelUI)SynthLookAndFeel.

                             getUIOfType(getUI(), SynthLabelUI.class),

                                   isSelected, cellHasFocus, list.isEnabled(), false);

            }

            else {

                SynthLookAndFeel.resetSelectedUI();

            }

            super.getListCellRendererComponent(list, value, index,

                                               isSelected, cellHasFocus);

            return this;

        }

        @Override public void paint(Graphics g) {

            super.paint(g);

            SynthLookAndFeel.resetSelectedUI();

        }

    }

}