gtkcolorchooserpanel.java

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/*
 * @(#)GTKColorChooserPanel.java	1.10 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package com.sun.java.swing.plaf.gtk;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.colorchooser.*;
import javax.swing.event.*;
import javax.swing.plaf.*;

/**
 * A color chooser panel mimicking that of GTK's: a color wheel showing
 * hue and a triangle that varies saturation and brightness.
 *
 * @version 1.10, 11/17/05
 * @author Scott Violet
 */
class GTKColorChooserPanel extends AbstractColorChooserPanel implements
              ChangeListener {
    private static final float PI_3 = (float)(Math.PI / 3);

    private ColorTriangle triangle;
    private JLabel lastLabel;
    private JLabel label;

    private JSpinner hueSpinner;
    private JSpinner saturationSpinner;
    private JSpinner valueSpinner;

    private JSpinner redSpinner;
    private JSpinner greenSpinner;
    private JSpinner blueSpinner;

    private JTextField colorNameTF;

    private boolean settingColor;

    // The colors are mirrored to avoid creep in adjusting an individual
    // value.
    private float hue;
    private float saturation;
    private float brightness;



    /**
     * Convenience method to transfer focus to the next child of component.
     */
    // PENDING: remove this when a variant of this is added to awt.
    static void compositeRequestFocus(Component component, boolean direction) {
 	if (component instanceof Container) {
 	    Container container = (Container)component;
 	    if (container.isFocusCycleRoot()) {
 		FocusTraversalPolicy policy = container.
                                              getFocusTraversalPolicy();
 		Component comp = policy.getDefaultComponent(container);
 		if (comp!=null) {
 		    comp.requestFocus();
 		    return;
 		}
 	    }
 	    Container rootAncestor = container.getFocusCycleRootAncestor();
 	    if (rootAncestor!=null) {
 		FocusTraversalPolicy policy = rootAncestor.
                                                  getFocusTraversalPolicy();
 		Component comp;

                if (direction) {
                    comp = policy.getComponentAfter(rootAncestor, container);
                }
                else {
                    comp = policy.getComponentBefore(rootAncestor, container);
                }
                if (comp != null) {
 		    comp.requestFocus();
 		    return;
 		}
 	    }
 	}
 	component.requestFocus();
    }


    /**
     * Returns a user presentable description of this GTKColorChooserPane.
     */
    public String getDisplayName() {
        return (String)UIManager.get("GTKColorChooserPanel.nameText");
    }

    /**
     * Returns the mnemonic to use with <code>getDisplayName</code>.
     */
    public int getMnemonic() {
        String m = (String)UIManager.get("GTKColorChooserPanel.mnemonic");

        if (m != null) {
            try {
                int value = Integer.parseInt(m);

                return value;
            } catch (NumberFormatException nfe) {}
        }
        return -1;
    }

    /**
     * Character to underline that represents the mnemonic.
     */
    public int getDisplayedMnemonicIndex() {
        String m = (String)UIManager.get(
                           "GTKColorChooserPanel.displayedMnemonicIndex");

        if (m != null) {
            try {
                int value = Integer.parseInt(m);

                return value;
            } catch (NumberFormatException nfe) {}
        }
        return -1;
    }

    public Icon getSmallDisplayIcon() {
        return null;
    }

    public Icon getLargeDisplayIcon() {
        return null;
    }

    public void uninstallChooserPanel(JColorChooser enclosingChooser) {
        super.uninstallChooserPanel(enclosingChooser);
        removeAll();
    }

    /**
     * Builds and configures the widgets for the GTKColorChooserPanel.
     */
    protected void buildChooser() {
        triangle = new ColorTriangle();
        triangle.setName("GTKColorChooserPanel.triangle");

        // PENDING: when we straighten out user setting opacity, this should
        // be changed.
        label = new OpaqueLabel();
        label.setName("GTKColorChooserPanel.colorWell");
        label.setOpaque(true);
        label.setMinimumSize(new Dimension(67, 32));
        label.setPreferredSize(new Dimension(67, 32));
        label.setMaximumSize(new Dimension(67, 32));

        // PENDING: when we straighten out user setting opacity, this should
        // be changed.
        lastLabel = new OpaqueLabel();
        lastLabel.setName("GTKColorChooserPanel.lastColorWell");
        lastLabel.setOpaque(true);
        lastLabel.setMinimumSize(new Dimension(67, 32));
        lastLabel.setPreferredSize(new Dimension(67, 32));
        lastLabel.setMaximumSize(new Dimension(67, 32));

        hueSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 360, 1));
        configureSpinner(hueSpinner, "GTKColorChooserPanel.hueSpinner");
        saturationSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 255, 1));
        configureSpinner(saturationSpinner,
                         "GTKColorChooserPanel.saturationSpinner");
        valueSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 255, 1));
        configureSpinner(valueSpinner, "GTKColorChooserPanel.valueSpinner");
        redSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 255, 1));
        configureSpinner(redSpinner, "GTKColorChooserPanel.redSpinner");
        greenSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 255, 1));
        configureSpinner(greenSpinner, "GTKColorChooserPanel.greenSpinner");
        blueSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 255, 1));
        configureSpinner(blueSpinner, "GTKColorChooserPanel.blueSpinner");

        colorNameTF = new JTextField(8);

        setLayout(new GridBagLayout());

        add(this, "GTKColorChooserPanel.hue", hueSpinner, -1, -1);
        add(this, "GTKColorChooserPanel.red", redSpinner, -1, -1);
        add(this, "GTKColorChooserPanel.saturation", saturationSpinner, -1,-1);
        add(this, "GTKColorChooserPanel.green", greenSpinner, -1, -1);
        add(this, "GTKColorChooserPanel.value", valueSpinner, -1, -1);
        add(this, "GTKColorChooserPanel.blue", blueSpinner, -1, -1);

        add(new JSeparator(SwingConstants.HORIZONTAL), new
                  GridBagConstraints(1, 3, 4, 1, 1, 0,
                  GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL,
                  new Insets(14, 0, 0, 0), 0, 0));

        add(this, "GTKColorChooserPanel.colorName", colorNameTF, 0, 4);

        add(triangle, new GridBagConstraints(0, 0, 1, 5, 0, 0,
                      GridBagConstraints.LINE_START, GridBagConstraints.NONE,
                      new Insets(14, 20, 2, 9), 0, 0));

        Box hBox = Box.createHorizontalBox();
        hBox.add(lastLabel);
        hBox.add(label);
        add(hBox, new GridBagConstraints(0, 5, 1, 1, 0, 0,
                      GridBagConstraints.CENTER, GridBagConstraints.NONE,
                      new Insets(0, 0, 0, 0), 0, 0));

        add(new JSeparator(SwingConstants.HORIZONTAL), new
                  GridBagConstraints(0, 6, 5, 1, 1, 0,
                  GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL,
                  new Insets(12, 0, 0, 0), 0, 0));
    }

    /**
     * Configures the spinner.
     */
    private void configureSpinner(JSpinner spinner, String name) {
        spinner.addChangeListener(this);
        spinner.setName(name);
        JComponent editor = spinner.getEditor();
        if (editor instanceof JSpinner.DefaultEditor) {
            JFormattedTextField ftf = ((JSpinner.DefaultEditor)editor).
                                                 getTextField();

            ftf.setFocusLostBehavior(JFormattedTextField.COMMIT_OR_REVERT);
        }
    }

    /**
     * Adds the widget creating a JLabel with the specified name.
     */
    private void add(Container parent, String key, JComponent widget,
                     int x, int y) {
        JLabel label = new JLabel(UIManager.getString(key + "Text",
                                                      getLocale()));
        String mnemonic = (String)UIManager.get(key + "Mnemonic", getLocale());

        if (mnemonic != null) {
            try {
                label.setDisplayedMnemonic(Integer.parseInt(mnemonic));
            } catch (NumberFormatException nfe) {
            }
            String mnemonicIndex = (String)UIManager.get(key + "MnemonicIndex",
                                                    getLocale());

            if (mnemonicIndex != null) {
                try {
                    label.setDisplayedMnemonicIndex(Integer.parseInt(
                                                        mnemonicIndex));
                } catch (NumberFormatException nfe) {
                }
            }
        }
        label.setLabelFor(widget);
        if (x < 0) {
            x = parent.getComponentCount() % 4;
        }
        if (y < 0) {
            y = parent.getComponentCount() / 4;
        }
        GridBagConstraints con = new GridBagConstraints(x + 1, y, 1, 1, 0, 0,
                   GridBagConstraints.FIRST_LINE_END, GridBagConstraints.NONE,
                   new Insets(4, 0, 0, 4), 0, 0);
        if (y == 0) {
            con.insets.top = 14;
        }
        parent.add(label, con);
        con.gridx++;
        parent.add(widget, con);
    }

    /**
     * Refreshes the display from the model.
     */
    public void updateChooser() {
        if (!settingColor) {
            lastLabel.setBackground(getColorFromModel());
            setColor(getColorFromModel(), true, true, false);
        }
    }

    /**
     * Resets the red component of the selected color.
     */
    private void setRed(int red) {
        setRGB(red << 16 | getColor().getGreen() << 8 | getColor().getBlue());
    }

    /**
     * Resets the green component of the selected color.
     */
    private void setGreen(int green) {
        setRGB(getColor().getRed() << 16 | green << 8 | getColor().getBlue());
    }

    /**
     * Resets the blue component of the selected color.
     */
    private void setBlue(int blue) {
        setRGB(getColor().getRed() << 16 | getColor().getGreen() << 8 | blue);
    }

    /**
     * Sets the hue of the selected color and updates the display if
     * necessary.
     */
    private void setHue(float hue, boolean update) {
        setHSB(hue, saturation, brightness);
        if (update) {
            settingColor = true;
            hueSpinner.setValue(new Integer((int)(hue * 360)));
            settingColor = false;
        }
    }

    /**
     * Returns the current amount of hue.
     */
    private float getHue() {
        return hue;
    }

    /**
     * Resets the saturation.
     */
    private void setSaturation(float saturation) {
        setHSB(hue, saturation, brightness);
    }

    /**
     * Returns the saturation.
     */
    private float getSaturation() {
        return saturation;
    }

    /**
     * Sets the brightness.
     */
    private void setBrightness(float brightness) {
        setHSB(hue, saturation, brightness);
    }

    /**
     * Returns the brightness.
     */
    private float getBrightness() {
        return brightness;
    }

    /**
     * Sets the saturation and brightness and updates the display if
     * necessary.
     */
    private void setSaturationAndBrightness(float s, float b, boolean update) {
        setHSB(hue, s, b);
        if (update) {
            settingColor = true;
            saturationSpinner.setValue(new Integer((int)(s * 255)));
            valueSpinner.setValue(new Integer((int)(b * 255)));
            settingColor = false;
        }
    }

    /**
     * Resets the rgb values.
     */
    private void setRGB(int rgb) {
        Color color = new Color(rgb);

        setColor(color, false, true, true);

        settingColor = true;
        hueSpinner.setValue(new Integer((int)(hue * 360)));
        saturationSpinner.setValue(new Integer((int)(saturation * 255)));
        valueSpinner.setValue(new Integer((int)(brightness * 255)));
        settingColor = false;
    }

    /**
     * Resets the hsb values.
     */
    private void setHSB(float h, float s, float b) {
        Color color = Color.getHSBColor(h, s, b);

        this.hue = h;
        this.saturation = s;
        this.brightness = b;
        setColor(color, false, false, true);

        settingColor = true;
        redSpinner.setValue(new Integer(color.getRed()));
        greenSpinner.setValue(new Integer(color.getGreen()));
        blueSpinner.setValue(new Integer(color.getBlue()));
        settingColor = false;
    }

    
    /**
     * Rests the color.
     *
     * @param color new Color
     * @param updateSpinners whether or not to update the spinners.
     * @param updateHSB if true, the hsb fields are updated based on the
     *                  new color
     * @param updateModel if true, the model is set.
     */
    private void setColor(Color color, boolean updateSpinners,
                          boolean updateHSB, boolean updateModel) {
        if (color == null) {
            color = Color.BLACK;
        }

        settingColor = true;

        if (updateHSB) {
            float[] hsb = Color.RGBtoHSB(color.getRed(), color.getGreen(),
                                         color.getBlue(), null);
            hue = hsb[0];
            saturation = hsb[1];
            brightness = hsb[2];
        }

        if (updateModel) {
            getColorSelectionModel().setSelectedColor(color);