/*

 * Copyright (c) 2008, 2012, 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.colorchooser;

import java.awt.Color;

import java.awt.ContainerOrderFocusTraversalPolicy;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

import javax.swing.border.EmptyBorder;

import javax.swing.JSpinner.DefaultEditor;

final class ColorPanel extends JPanel implements ActionListener {

    private final SlidingSpinner[] spinners = new SlidingSpinner[5];

    private final float[] values = new float[this.spinners.length];

    private final ColorModel model;

    private Color color;

    private int x = 1;

    private int y = 2;

    private int z;

    ColorPanel(ColorModel model) {

        super(new GridBagLayout());

        GridBagConstraints gbc = new GridBagConstraints();

        gbc.fill = GridBagConstraints.HORIZONTAL;

        gbc.gridx = 1;

        ButtonGroup group = new ButtonGroup();

        EmptyBorder border = null;

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

            if (i < 3) {

                JRadioButton button = new JRadioButton();

                if (i == 0) {

                    Insets insets = button.getInsets();

                    insets.left = button.getPreferredSize().width;

                    border = new EmptyBorder(insets);

                    button.setSelected(true);

                    gbc.insets.top = 5;

                }

                add(button, gbc);

                group.add(button);

                button.setActionCommand(Integer.toString(i));

                button.addActionListener(this);

                this.spinners[i] = new SlidingSpinner(this, button);

            }

            else {

                JLabel label = new JLabel();

                add(label, gbc);

                label.setBorder(border);

                label.setFocusable(false);

                this.spinners[i] = new SlidingSpinner(this, label);

            }

        }

        gbc.gridx = 2;

        gbc.weightx = 1.0;

        gbc.insets.top = 0;

        gbc.insets.left = 5;

        for (SlidingSpinner spinner : this.spinners) {

            add(spinner.getSlider(), gbc);

            gbc.insets.top = 5;

        }

        gbc.gridx = 3;

        gbc.weightx = 0.0;

        gbc.insets.top = 0;

        for (SlidingSpinner spinner : this.spinners) {

            add(spinner.getSpinner(), gbc);

            gbc.insets.top = 5;

        }

        setFocusTraversalPolicy(new ContainerOrderFocusTraversalPolicy());

        setFocusTraversalPolicyProvider(true);

        setFocusable(false);

        this.model = model;

    }

    public void actionPerformed(ActionEvent event) {

        try {

            this.z = Integer.parseInt(event.getActionCommand());

            this.y = (this.z != 2) ? 2 : 1;

            this.x = (this.z != 0) ? 0 : 1;

            getParent().repaint();

        }

        catch (NumberFormatException exception) {

        }

    }

    void buildPanel() {

        int count = this.model.getCount();

        this.spinners[4].setVisible(count > 4);

        for (int i = 0; i < count; i++) {

            String text = this.model.getLabel(this, i);

            Object object = this.spinners[i].getLabel();

            if (object instanceof JRadioButton) {

                JRadioButton button = (JRadioButton) object;

                button.setText(text);

                button.getAccessibleContext().setAccessibleDescription(text);

            }

            else if (object instanceof JLabel) {

                JLabel label = (JLabel) object;

                label.setText(text);

            }

            this.spinners[i].setRange(this.model.getMinimum(i), this.model.getMaximum(i));

            this.spinners[i].setValue(this.values[i]);

            this.spinners[i].getSlider().getAccessibleContext().setAccessibleName(text);

            this.spinners[i].getSpinner().getAccessibleContext().setAccessibleName(text);

            DefaultEditor editor = (DefaultEditor) this.spinners[i].getSpinner().getEditor();

            editor.getTextField().getAccessibleContext().setAccessibleName(text);

            this.spinners[i].getSlider().getAccessibleContext().setAccessibleDescription(text);

            this.spinners[i].getSpinner().getAccessibleContext().setAccessibleDescription(text);

            editor.getTextField().getAccessibleContext().setAccessibleDescription(text);

        }

    }

    void colorChanged() {

        this.color = new Color(getColor(0), true);

        Object parent = getParent();

        if (parent instanceof ColorChooserPanel) {

            ColorChooserPanel chooser = (ColorChooserPanel) parent;

            chooser.setSelectedColor(this.color);

            chooser.repaint();

        }

    }

    float getValueX() {

        return this.spinners[this.x].getValue();

    }

    float getValueY() {

        return 1.0f - this.spinners[this.y].getValue();

    }

    float getValueZ() {

        return 1.0f - this.spinners[this.z].getValue();

    }

    void setValue(float z) {

        this.spinners[this.z].setValue(1.0f - z);

        colorChanged();

    }

    void setValue(float x, float y) {

        this.spinners[this.x].setValue(x);

        this.spinners[this.y].setValue(1.0f - y);

        colorChanged();

    }

    int getColor(float z) {

        setDefaultValue(this.x);

        setDefaultValue(this.y);

        this.values[this.z] = 1.0f - z;

        return getColor(3);

    }

    int getColor(float x, float y) {

        this.values[this.x] = x;

        this.values[this.y] = 1.0f - y;

        setValue(this.z);

        return getColor(3);

    }

    void setColor(Color color) {

        if (!color.equals(this.color)) {

            this.color = color;

            this.model.setColor(color.getRGB(), this.values);

            for (int i = 0; i < this.model.getCount(); i++) {

                this.spinners[i].setValue(this.values[i]);

            }

        }

    }

    private int getColor(int index) {

        while (index < this.model.getCount()) {

            setValue(index++);

        }

        return this.model.getColor(this.values);

    }

    private void setValue(int index) {

        this.values[index] = this.spinners[index].getValue();

    }

    private void setDefaultValue(int index) {

        float value = this.model.getDefault(index);

        this.values[index] = (value < 0.0f)

                ? this.spinners[index].getValue()

                : value;

    }

}