/*

 * Copyright 2002-2006 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package javax.swing.plaf.synth;

import java.awt.*;

import java.awt.event.*;

import java.lang.reflect.*;

import javax.swing.*;

import javax.accessibility.*;

import javax.swing.FocusManager;

import javax.swing.plaf.*;

import javax.swing.border.*;

import javax.swing.text.*;

import javax.swing.event.*;

import javax.swing.plaf.basic.*;

import java.beans.PropertyChangeListener;

import java.beans.PropertyChangeEvent;

import sun.awt.AppContext;

import sun.swing.plaf.synth.SynthUI;

/**

 * Synth's ComboBoxUI.

 *

 * @author Scott Violet

 */

class SynthComboBoxUI extends BasicComboBoxUI implements

                              PropertyChangeListener, SynthUI {

    private SynthStyle style;

    private boolean useListColors;

    public static ComponentUI createUI(JComponent c) {

        return new SynthComboBoxUI();

    }

    protected void installDefaults() {

        updateStyle(comboBox);

    }

    private void updateStyle(JComboBox comboBox) {

        SynthStyle oldStyle = style;

        SynthContext context = getContext(comboBox, ENABLED);

        style = SynthLookAndFeel.updateStyle(context, this);

        if (style != oldStyle) {

            useListColors = style.getBoolean(context,

                                  "ComboBox.rendererUseListColors", true);

            if (oldStyle != null) {

                uninstallKeyboardActions();

                installKeyboardActions();

            }

        }

        context.dispose();

        if(listBox != null) {

            SynthLookAndFeel.updateStyles(listBox);

        }

    }

    protected void installListeners() {

        comboBox.addPropertyChangeListener(this);

        super.installListeners();

    }

    protected void uninstallDefaults() {

        SynthContext context = getContext(comboBox, ENABLED);

        style.uninstallDefaults(context);

        context.dispose();

        style = null;

    }

    protected void uninstallListeners() {

        comboBox.removePropertyChangeListener(this);

        super.uninstallListeners();

    }

    public SynthContext getContext(JComponent c) {

        return getContext(c, getComponentState(c));

    }

    private SynthContext getContext(JComponent c, int state) {

        return SynthContext.getContext(SynthContext.class, c,

                    SynthLookAndFeel.getRegion(c), style, state);

    }

    private Region getRegion(JComponent c) {

        return SynthLookAndFeel.getRegion(c);

    }

    private int getComponentState(JComponent c) {

        return SynthLookAndFeel.getComponentState(c);

    }

    protected ComboPopup createPopup() {

        SynthComboPopup popup = new SynthComboPopup( comboBox );

        return popup;

    }

    protected ListCellRenderer createRenderer() {

        return new SynthComboBoxRenderer();

    }

    protected ComboBoxEditor createEditor() {

        return new SynthComboBoxEditor();

    }

    //

    // end UI Initialization

    //======================

    public void propertyChange(PropertyChangeEvent e) {

        if (SynthLookAndFeel.shouldUpdateStyle(e)) {

            updateStyle(comboBox);

        }

    }

    protected JButton createArrowButton() {

        SynthArrowButton button = new SynthArrowButton(SwingConstants.SOUTH);

        button.setName("ComboBox.arrowButton");

        return button;

    }

    //=================================

    // begin ComponentUI Implementation

    public void update(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);

        context.getPainter().paintComboBoxBackground(context, g, 0, 0,

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

        paint(context, g);

        context.dispose();

    }

    public void paint(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        paint(context, g);

        context.dispose();

    }

    protected void paint(SynthContext context, Graphics g) {

        hasFocus = comboBox.hasFocus();

        if ( !comboBox.isEditable() ) {

            Rectangle r = rectangleForCurrentValue();

            paintCurrentValue(g,r,hasFocus);

        }

    }

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

                            int y, int w, int h) {

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

    }

    /**

     * Paints the currently selected item.

     */

    public void paintCurrentValue(Graphics g,Rectangle bounds,boolean hasFocus) {

        ListCellRenderer renderer = comboBox.getRenderer();

        Component c;

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

            c = renderer.getListCellRendererComponent( listBox,

                                                       comboBox.getSelectedItem(),

                                                       -1,

                                                       false,

                                                       false );

        }

        else {

            c = renderer.getListCellRendererComponent( listBox,

                                                       comboBox.getSelectedItem(),

                                                       -1,

                                                       false,

                                                       false );

        }

        // Fix for 4238829: should lay out the JPanel.

        boolean shouldValidate = false;

        if (c instanceof JPanel)  {

            shouldValidate = true;

        }

        if (c instanceof UIResource) {

            c.setName("ComboBox.renderer");

            currentValuePane.paintComponent(g,c,comboBox,bounds.x,bounds.y,

                                        bounds.width,bounds.height, shouldValidate);

        }

        else {

            currentValuePane.paintComponent(g,c,comboBox,bounds.x,bounds.y,

                                        bounds.width,bounds.height, shouldValidate);

        }

    }

    /**

     * From BasicComboBoxRenderer v 1.18.

     */

    private class SynthComboBoxRenderer extends JLabel implements ListCellRenderer, UIResource {

        public SynthComboBoxRenderer() {

            super();

            setText(" ");

        }

        public String getName() {

            // As SynthComboBoxRenderer's are asked for a size BEFORE they

            // are parented getName is overriden to force the name to be

            // ComboBox.renderer if it isn't set. If we didn't do this the

            // wrong style could be used for size calculations.

            String name = super.getName();

            if (name == null) {

                return "ComboBox.renderer";

            }

            return name;

        }

        public Component getListCellRendererComponent(JList list, Object value,

                         int index, boolean isSelected, boolean cellHasFocus) {

            setName("ComboBox.listRenderer");

            SynthLookAndFeel.resetSelectedUI();

            if (isSelected) {

                setBackground(list.getSelectionBackground());

                setForeground(list.getSelectionForeground());

                if (!useListColors) {

                    SynthLookAndFeel.setSelectedUI(

                         (SynthLabelUI)SynthLookAndFeel.getUIOfType(getUI(),

                         SynthLabelUI.class), isSelected, cellHasFocus,

                         list.isEnabled(), false);

                }

            }

            else {

                setBackground(list.getBackground());

                setForeground(list.getForeground());

            }

            setFont(list.getFont());

            if (value instanceof Icon) {

                setIcon((Icon)value);

                setText("");

            }

            else {

                String text = (value == null) ? " " : value.toString();

                if ("".equals(text)) {

                    text = " ";

                }

                setText(text);

            }

            // The renderer component should inherit the enabled and

            // orientation state of its parent combobox.  This is

            // especially needed for GTK comboboxes, where the

            // ListCellRenderer's state determines the visual state

            // of the combobox.

            setEnabled(comboBox.isEnabled());

            setComponentOrientation(comboBox.getComponentOrientation());

            return this;

        }

        public void paint(Graphics g) {

            super.paint(g);

            SynthLookAndFeel.resetSelectedUI();

        }

    }

    /**

     * From BasicCombBoxEditor v 1.24.

     */

    private static class SynthComboBoxEditor implements

                              ComboBoxEditor, UIResource {

        protected JTextField editor;

        private Object oldValue;

        public SynthComboBoxEditor() {

            editor = new JTextField("",9);

            editor.setName("ComboBox.textField");

        }

        public Component getEditorComponent() {

            return editor;

        }

        /**

         * Sets the item that should be edited.

         *

         * @param anObject the displayed value of the editor

         */

        public void setItem(Object anObject) {

            String text;

            if ( anObject != null )  {

                text = anObject.toString();

                oldValue = anObject;

            } else {

                text = "";

            }

            // workaround for 4530952

            if (!text.equals(editor.getText())) {

                editor.setText(text);

            }

        }

        public Object getItem() {

            Object newValue = editor.getText();

            if (oldValue != null && !(oldValue instanceof String))  {

                // The original value is not a string. Should return the value in it's

                // original type.

                if (newValue.equals(oldValue.toString())) {

                    return oldValue;

                } else {

                    // Must take the value from the editor and get the value and cast it to the new type.

                    Class cls = oldValue.getClass();

                    try {

                        Method method = cls.getMethod("valueOf", new Class[]{String.class});

                        newValue = method.invoke(oldValue, new Object[] { editor.getText()});

                    } catch (Exception ex) {

                        // Fail silently and return the newValue (a String object)

                    }

                }

            }

            return newValue;

        }

        public void selectAll() {

            editor.selectAll();

            editor.requestFocus();

        }

        public void addActionListener(ActionListener l) {

            editor.addActionListener(l);

        }

        public void removeActionListener(ActionListener l) {

            editor.removeActionListener(l);

        }

    }

}