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+/* DefaultHSBChooserPanel.java --
+ Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.colorchooser;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.GridLayout;
+import java.awt.Image;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseMotionListener;
+import java.awt.image.MemoryImageSource;
+
+import javax.swing.AbstractButton;
+import javax.swing.ButtonGroup;
+import javax.swing.Icon;
+import javax.swing.JColorChooser;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JSlider;
+import javax.swing.JSpinner;
+import javax.swing.SpinnerNumberModel;
+import javax.swing.SwingConstants;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+
+/**
+ * This is the Default HSB Panel displayed in the JColorChooser.
+ */
+class DefaultHSBChooserPanel extends AbstractColorChooserPanel
+{
+ /** The gradient image displayed.
+ * This is package-private to avoid an accessor method. */
+ transient Image gradientImage;
+
+ /** The Panel that holds the gradient image. */
+ private transient JPanel gradientPanel;
+
+ /** The track gradient image.
+ * This is package-private to avoid an accessor method. */
+ transient Image trackImage;
+
+ /** The panel that holds the track. */
+ private transient JPanel trackPanel;
+
+ /** The slider for the locked HSB value.
+ * This is package-private to avoid an accessor method. */
+ transient JSlider slider;
+
+ /** The RadioButton that controls the Hue.
+ * This is package-private to avoid an accessor method. */
+ transient JRadioButton hRadio;
+
+ /** The RadioButton that controls the Saturation.
+ * This is package-private to avoid an accessor method. */
+ transient JRadioButton sRadio;
+
+ /** The RadioButton that controls the Brightness.
+ * This is package-private to avoid an accessor method. */
+ transient JRadioButton bRadio;
+
+ /** The JSpinner that controls the Hue.
+ * This is package-private to avoid an accessor method. */
+ transient JSpinner hSpinner;
+
+ /** The JSpinner that controls the Saturation.
+ * This is package-private to avoid an accessor method. */
+ transient JSpinner sSpinner;
+
+ /** The JSpinner that controls the Brightness.
+ * This is package-private to avoid an accessor method. */
+ transient JSpinner bSpinner;
+
+ /** The default width of the gradient image. */
+ private static final int imgWidth = 200;
+
+ /** The default height of the gradient image. */
+ private static final int imgHeight = 200;
+
+ /** The default width of the track gradient. */
+ private static final int trackWidth = 30;
+
+ /** The JLabel for Red. */
+ private static final JLabel R = new JLabel("R");
+
+ /** The JLabel for Green. */
+ private static final JLabel G = new JLabel("G");
+
+ /** The JLabel for Blue. */
+ private static final JLabel B = new JLabel("B");
+
+ // FIXME: Should be textfields.
+
+ /** The JLabel that displays the value of Red. */
+ private transient JLabel rFull;
+
+ /** The JLabel that displays the value of Green. */
+ private transient JLabel gFull;
+
+ /** The JLabel that displays the value of Blue. */
+ private transient JLabel bFull;
+
+ /** The point that is displayed in the gradient image.
+ * Package-private to avoid an accessor method.
+ */
+ transient Point gradientPoint = new Point();
+
+ /**
+ * This indicates that the change to the slider or point is triggered
+ * internally.
+ * This is package-private to avoid an accessor method.
+ */
+ transient boolean internalChange = false;
+
+ /** This indicates that the change to the spinner is triggered
+ * internally.
+ * This is package-private to avoid an accessor method. */
+ transient boolean spinnerTrigger = false;
+
+ /** This int identifies which spinner is currently locked.
+ * This is package-private to avoid an accessor method. */
+ transient int locked = -1;
+
+ /** This value indicates that the Hue spinner is locked. */
+ static final int HLOCKED = 0;
+
+ /** This value indicates that the Saturation spinner is locked. */
+ static final int SLOCKED = 1;
+
+ /** This value indicates that the Brightness spinner is locked. */
+ static final int BLOCKED = 2;
+
+ /**
+ * This method indicates that the mouse event is in the process of being
+ * handled.
+ * This is package-private to avoid an accessor method.
+ */
+ transient boolean handlingMouse;
+
+ /**
+ * This helper class handles mouse events on the gradient image.
+ */
+ class MainGradientMouseListener extends MouseAdapter
+ implements MouseMotionListener
+ {
+ /**
+ * This method is called when the mouse is pressed over the gradient
+ * image. The JColorChooser is then updated with new HSB values.
+ *
+ * @param e The MouseEvent.
+ */
+ public void mousePressed(MouseEvent e)
+ {
+ gradientPoint = e.getPoint();
+ update(e.getPoint());
+ }
+
+ /**
+ * This method is called when the mouse is dragged over the gradient
+ * image. The JColorChooser is then updated with the new HSB values.
+ *
+ * @param e The MouseEvent.
+ */
+ public void mouseDragged(MouseEvent e)
+ {
+ Point p = e.getPoint();
+ if (p.x < 0 || p.y < 0 || p.y > imgHeight || p.x > imgWidth)
+ return;
+
+ gradientPoint = p;
+ update(p);
+ }
+
+ /**
+ * This method is called when the mouse is moved over the gradient image.
+ *
+ * @param e The MouseEvent.
+ */
+ public void mouseMoved(MouseEvent e)
+ {
+ // Do nothing.
+ }
+
+ /**
+ * This method updates the JColorChooser with the new values.
+ *
+ * @param p The Point where the MouseEvent occurred.
+ */
+ private void update(Point p)
+ {
+ handlingMouse = true;
+ if (hSpinner.isEnabled())
+ updateH(p);
+ else if (sSpinner.isEnabled())
+ updateS(p);
+ else
+ updateB(p);
+ handlingMouse = false;
+ }
+
+ /**
+ * This method updates the SB values if Hue is locked.
+ *
+ * @param p The point where the MouseEvent occurred.
+ */
+ private void updateH(Point p)
+ {
+ float s = (imgWidth - p.x * 1f) / imgWidth;
+ float b = (imgHeight - p.y * 1f) / imgHeight;
+
+ // Avoid two changes to the model by changing internalChange to true.
+ internalChange = true;
+ sSpinner.setValue(new Integer((int) (s * 100)));
+ internalChange = false;
+ bSpinner.setValue(new Integer((int) (b * 100)));
+
+ revalidate();
+ }
+
+ /**
+ * This method updates the HB values if Saturation is locked.
+ *
+ * @param p The point where the MouseEvent occurred.
+ */
+ private void updateS(Point p)
+ {
+ float h = p.x * 1f / imgWidth;
+ float b = (imgHeight - p.y * 1f) / imgHeight;
+
+ internalChange = true;
+ hSpinner.setValue(new Integer((int) (h * 365)));
+ internalChange = false;
+ bSpinner.setValue(new Integer((int) (b * 100)));
+
+ revalidate();
+ }
+
+ /**
+ * This method updates the HS values if Brightness is locked.
+ *
+ * @param p The point where the MouseEvent occurred.
+ */
+ private void updateB(Point p)
+ {
+ float h = p.x * 1f / imgWidth;
+ float s = (imgHeight - p.y * 1f) / imgHeight;
+
+ internalChange = true;
+ hSpinner.setValue(new Integer((int) (h * 365)));
+ internalChange = false;
+ sSpinner.setValue(new Integer((int) (s * 100)));
+
+ revalidate();
+ }
+ }
+
+ /**
+ * This method listens for slider value changes.
+ */
+ class SliderChangeListener implements ChangeListener
+ {
+ /**
+ * This method is called when the slider value changes. It should change
+ * the color of the JColorChooser.
+ *
+ * @param e The ChangeEvent.
+ */
+ public void stateChanged(ChangeEvent e)
+ {
+ if (internalChange)
+ return;
+
+ Integer value = new Integer(slider.getValue());
+
+ switch (locked)
+ {
+ case HLOCKED:
+ hSpinner.setValue(value);
+ break;
+ case SLOCKED:
+ sSpinner.setValue(value);
+ break;
+ case BLOCKED:
+ bSpinner.setValue(value);
+ break;
+ }
+ }
+ }
+
+ /**
+ * This helper class determines the active JSpinner.
+ */
+ class RadioStateListener implements ChangeListener
+ {
+ /**
+ * This method is called when there is a new JRadioButton that was
+ * selected. As a result, it should activate the associated JSpinner.
+ *
+ * @param e The ChangeEvent.
+ */
+ public void stateChanged(ChangeEvent e)
+ {
+ JSpinner change;
+ if (e.getSource() == hRadio)
+ {
+ locked = HLOCKED;
+ change = hSpinner;
+ }
+ else if (e.getSource() == sRadio)
+ {
+ locked = SLOCKED;
+ change = sSpinner;
+ }
+ else
+ {
+ locked = BLOCKED;
+ change = bSpinner;
+ }
+
+ change.setEnabled(((AbstractButton) e.getSource()).isSelected());
+ updateSlider();
+ updateTrack();
+ updateImage();
+ repaint();
+ }
+ }
+
+ /**
+ * This class listens to the JSpinners for changes.
+ */
+ class ImageScrollListener implements ChangeListener
+ {
+ /**
+ * This method is called whenever one of the JSpinner values change. The
+ * JColorChooser should be updated with the new HSB values.
+ *
+ * @param e The ChangeEvent.
+ */
+ public void stateChanged(ChangeEvent e)
+ {
+ if (internalChange)
+ return;
+
+ float h = ((Number) hSpinner.getValue()).intValue() / 360f;
+ float s = ((Number) sSpinner.getValue()).intValue() / 100f;
+ float b = ((Number) bSpinner.getValue()).intValue() / 100f;
+
+ spinnerTrigger = true;
+ getColorSelectionModel().setSelectedColor(new Color(Color.HSBtoRGB(h, s,
+ b)));
+ spinnerTrigger = false;
+
+ if (! handlingMouse && slider != null && ! slider.getValueIsAdjusting())
+ {
+ updateImage();
+ updateTrack();
+ }
+ repaint();
+ }
+ }
+
+ /**
+ * Creates a new DefaultHSBChooserPanel object.
+ */
+ DefaultHSBChooserPanel()
+ {
+ super();
+ }
+
+ /**
+ * This method returns the name displayed by the JColorChooser tab that
+ * holds this panel.
+ *
+ * @return The name displayed in the JColorChooser tab.
+ */
+ public String getDisplayName()
+ {
+ return "HSB";
+ }
+
+ /**
+ * This method updates the various components inside the HSBPanel (the
+ * JSpinners, the JSlider, and the gradient image point) with updated
+ * values when the JColorChooser color value changes.
+ */
+ public void updateChooser()
+ {
+ Color c = getColorSelectionModel().getSelectedColor();
+
+ float[] hsbVals = Color.RGBtoHSB(c.getRed(), c.getGreen(), c.getBlue(),
+ null);
+
+ internalChange = true;
+
+ if (! spinnerTrigger)
+ {
+ hSpinner.setValue(new Integer((int) (hsbVals[0] * 360)));
+ sSpinner.setValue(new Integer((int) (hsbVals[1] * 100)));
+ bSpinner.setValue(new Integer((int) (hsbVals[2] * 100)));
+ }
+
+ switch (locked)
+ {
+ case HLOCKED:
+ if (slider != null)
+ slider.setValue(((Number) hSpinner.getValue()).intValue());
+ if (! handlingMouse)
+ {
+ gradientPoint.x = (int) ((1
+ - ((Number) sSpinner.getValue()).intValue() / 100f) * imgWidth);
+ gradientPoint.y = (int) ((1
+ - ((Number) bSpinner.getValue()).intValue() / 100f) * imgHeight);
+ }
+ break;
+ case SLOCKED:
+ if (slider != null)
+ slider.setValue(((Number) sSpinner.getValue()).intValue());
+ if (! handlingMouse)
+ {
+ gradientPoint.x = (int) (((Number) hSpinner.getValue()).intValue() / 360f * imgWidth);
+ gradientPoint.y = (int) ((1
+ - ((Number) bSpinner.getValue()).intValue() / 100f) * imgHeight);
+ }
+ break;
+ case BLOCKED:
+ if (slider != null)
+ slider.setValue(((Number) bSpinner.getValue()).intValue());
+ if (! handlingMouse)
+ {
+ gradientPoint.x = (int) (((Number) hSpinner.getValue()).intValue() / 360f * imgWidth);
+ gradientPoint.y = (int) ((1
+ - ((Number) sSpinner.getValue()).intValue() / 100f) * imgHeight);
+ }
+ break;
+ }
+ internalChange = false;
+
+ if (! handlingMouse && slider != null && ! slider.getValueIsAdjusting())
+ updateImage();
+
+ if (! handlingMouse || locked != HLOCKED)
+ updateTrack();
+ updateTextFields();
+ }
+
+ /**
+ * This method builds the DefaultHSBChooserPanel.
+ */
+ protected void buildChooser()
+ {
+ setLayout(new BorderLayout());
+
+ add(buildRightPanel(), BorderLayout.EAST);
+
+ JPanel container = new JPanel();
+ container.setLayout(new BorderLayout());
+
+ gradientPanel = new JPanel()
+ {
+ public Dimension getPreferredSize()
+ {
+ return new Dimension(imgWidth, imgHeight);
+ }
+
+ public void paint(Graphics g)
+ {
+ if (gradientImage != null)
+ g.drawImage(gradientImage, 0, 0, this);
+
+ Color saved = g.getColor();
+ g.setColor(Color.WHITE);
+ g.drawOval(gradientPoint.x - 3, gradientPoint.y - 3, 6, 6);
+ g.setColor(saved);
+ }
+ };
+
+ MouseAdapter ml = new MainGradientMouseListener();
+ gradientPanel.addMouseListener(ml);
+ gradientPanel.addMouseMotionListener((MouseMotionListener) ml);
+
+ trackPanel = new JPanel()
+ {
+ public Dimension getPreferredSize()
+ {
+ return new Dimension(trackWidth, imgHeight);
+ }
+
+ public void paint(Graphics g)
+ {
+ if (trackImage != null)
+ g.drawImage(trackImage, 0, 0, this);
+ }
+ };
+
+ slider = new JSlider();
+ slider.setPaintTrack(false);
+ slider.setPaintTicks(false);
+
+ slider.setOrientation(SwingConstants.VERTICAL);
+
+ updateSlider();
+
+ container.add(gradientPanel, BorderLayout.WEST);
+ container.add(slider, BorderLayout.CENTER);
+ container.add(trackPanel, BorderLayout.EAST);
+
+ add(container, BorderLayout.WEST);
+ slider.addChangeListener(new SliderChangeListener());
+ repaint();
+ }
+
+ /**
+ * This method uninstalls the DefaultHSBPanel.
+ *
+ * @param chooser The JColorChooser to remove this panel from.
+ */
+ public void uninstallChooserPanel(JColorChooser chooser)
+ {
+ trackImage = null;
+ gradientImage = null;
+ gradientPanel = null;
+ slider = null;
+
+ hSpinner = null;
+ sSpinner = null;
+ bSpinner = null;
+
+ hRadio = null;
+ sRadio = null;
+ bRadio = null;
+
+ removeAll();
+ super.uninstallChooserPanel(chooser);
+ }
+
+ /**
+ * This helper method creates the right side panel (the panel with the
+ * Spinners and TextFields).
+ *
+ * @return The right side panel.
+ */
+ private Container buildRightPanel()
+ {
+ JPanel container = new JPanel();
+ container.setLayout(new GridLayout(6, 2));
+
+ hRadio = new JRadioButton("H");
+ sRadio = new JRadioButton("S");
+ bRadio = new JRadioButton("B");
+
+ ButtonGroup group = new ButtonGroup();
+ group.add(hRadio);
+ group.add(sRadio);
+ group.add(bRadio);
+
+ hSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 359, 1));
+ sSpinner = new JSpinner(new SpinnerNumberModel(0, 0, 100, 1));
+ bSpinner = new JSpinner(new SpinnerNumberModel(100, 0, 100, 1));
+
+ hSpinner.setEnabled(false);
+ sSpinner.setEnabled(false);
+ bSpinner.setEnabled(false);
+
+ ChangeListener cl = new RadioStateListener();
+ ChangeListener scroll = new ImageScrollListener();
+
+ hRadio.addChangeListener(cl);
+ sRadio.addChangeListener(cl);
+ bRadio.addChangeListener(cl);
+
+ hSpinner.addChangeListener(scroll);
+ sSpinner.addChangeListener(scroll);
+ bSpinner.addChangeListener(scroll);
+
+ hRadio.setSelected(true);
+
+ container.add(hRadio);
+ container.add(hSpinner);
+
+ container.add(sRadio);
+ container.add(sSpinner);
+
+ container.add(bRadio);
+ container.add(bSpinner);
+
+ rFull = new JLabel("red full");
+ gFull = new JLabel("green full");
+ bFull = new JLabel("blue full");
+
+ container.add(R);
+ container.add(rFull);
+
+ container.add(G);
+ container.add(gFull);
+
+ container.add(B);
+ container.add(bFull);
+
+ return container;
+ }
+
+ /**
+ * This method returns the small display icon.
+ *
+ * @return The small display icon.
+ */
+ public Icon getSmallDisplayIcon()
+ {
+ return null;
+ }
+
+ /**
+ * This method returns the large display icon.
+ *
+ * @return The large display icon.
+ */
+ public Icon getLargeDisplayIcon()
+ {
+ return null;
+ }
+
+ /**
+ * This method paints the chooser panel.
+ *
+ * @param g The graphics object to paint with.
+ */
+ public void paint(Graphics g)
+ {
+ super.paint(g);
+ }
+
+ /**
+ * This method updates the gradient image with a new one taking the Hue
+ * value as the constant.
+ */
+ private void updateHLockImage()
+ {
+ int index = 0;
+ int[] pix = new int[imgWidth * imgHeight];
+ float hValue = ((Number) hSpinner.getValue()).intValue() / 360f;
+
+ for (int j = 0; j < imgHeight; j++)
+ for (int i = 0; i < imgWidth; i++)
+ pix[index++] = Color.HSBtoRGB(hValue, (imgWidth - i * 1f) / imgWidth,
+ (imgHeight - j * 1f) / imgHeight)
+ | (255 << 24);
+
+ gradientImage = createImage(new MemoryImageSource(imgWidth, imgHeight,
+ pix, 0, imgWidth));
+ }
+
+ /**
+ * This method updates the gradient image with a new one taking the
+ * Brightness value as the constant.
+ */
+ private void updateBLockImage()
+ {
+ int[] pix = new int[imgWidth * imgHeight];
+ float bValue = ((Number) bSpinner.getValue()).intValue() / 100f;
+
+ int index = 0;
+ for (int j = 0; j < imgHeight; j++)
+ for (int i = 0; i < imgWidth; i++)
+ pix[index++] = Color.HSBtoRGB(i * 1f / imgWidth,
+ (imgHeight - j * 1f) / imgHeight, bValue)
+ | (255 << 24);
+
+ gradientImage = createImage(new MemoryImageSource(imgWidth, imgHeight,
+ pix, 0, imgWidth));
+ }
+
+ /**
+ * This method updates the gradient image with a new one taking the
+ * Saturation value as the constant.
+ */
+ private void updateSLockImage()
+ {
+ int[] pix = new int[imgWidth * imgHeight];
+ float sValue = ((Number) sSpinner.getValue()).intValue() / 100f;
+
+ int index = 0;
+ for (int j = 0; j < imgHeight; j++)
+ for (int i = 0; i < imgWidth; i++)
+ pix[index++] = Color.HSBtoRGB(i * 1f / imgWidth, sValue,
+ (imgHeight - j * 1f) / imgHeight)
+ | (255 << 24);
+ gradientImage = createImage(new MemoryImageSource(imgWidth, imgHeight,
+ pix, 0, imgWidth));
+ }
+
+ /**
+ * This method calls the appropriate method to update the gradient image
+ * depending on which HSB value is constant.
+ * This is package-private to avoid an accessor method.
+ */
+ void updateImage()
+ {
+ switch (locked)
+ {
+ case HLOCKED:
+ updateHLockImage();
+ break;
+ case SLOCKED:
+ updateSLockImage();
+ break;
+ case BLOCKED:
+ updateBLockImage();
+ break;
+ }
+ }
+
+ /**
+ * This method updates the TextFields with the correct RGB values.
+ */
+ private void updateTextFields()
+ {
+ int c = getColorSelectionModel().getSelectedColor().getRGB();
+
+ rFull.setText("" + (c >> 16 & 0xff));
+ gFull.setText("" + (c >> 8 & 0xff));
+ bFull.setText("" + (c & 0xff));
+
+ repaint();
+ }
+
+ /**
+ * This method updates the slider in response to making a different HSB
+ * property the constant.
+ * This is package-private to avoid an accessor method.
+ */
+ void updateSlider()
+ {
+ if (slider == null)
+ return;
+
+ slider.setMinimum(0);
+ if (locked == HLOCKED)
+ {
+ slider.setMaximum(359);
+ slider.setValue(((Number) hSpinner.getValue()).intValue());
+ slider.setInverted(true);
+ }
+ else
+ {
+ slider.setMaximum(100);
+ slider.setInverted(false);
+ if (sRadio.isSelected())
+ slider.setValue(((Number) sSpinner.getValue()).intValue());
+ else
+ slider.setValue(((Number) bSpinner.getValue()).intValue());
+ }
+ repaint();
+ }
+
+ /**
+ * This method updates the track gradient image depending on which HSB
+ * property is constant.
+ * This is package-private to avoid an accessor method.
+ */
+ void updateTrack()
+ {
+ switch (locked)
+ {
+ case HLOCKED:
+ updateHTrack();
+ break;
+ case SLOCKED:
+ updateSTrack();
+ break;
+ case BLOCKED:
+ updateBTrack();
+ break;
+ }
+ }
+
+ /**
+ * This method updates the track gradient image if the Hue value is allowed
+ * to change (according to the JRadioButtons).
+ */
+ private void updateHTrack()
+ {
+ int trackIndex = 0;
+ int[] trackPix = new int[trackWidth * imgHeight];
+
+ for (int j = 0; j < imgHeight; j++)
+ for (int i = 0; i < trackWidth; i++)
+ trackPix[trackIndex++] = Color.HSBtoRGB(j * 1f / imgHeight, 1f, 1f)
+ | (255 << 24);
+
+ trackImage = createImage(new MemoryImageSource(trackWidth, imgHeight,
+ trackPix, 0, trackWidth));
+ }
+
+ /**
+ * This method updates the track gradient image if the Saturation value is
+ * allowed to change (according to the JRadioButtons).
+ */
+ private void updateSTrack()
+ {
+ int[] trackPix = new int[trackWidth * imgHeight];
+
+ float hValue = ((Number) hSpinner.getValue()).intValue() / 360f;
+ float bValue = ((Number) bSpinner.getValue()).intValue() / 100f;
+
+ int trackIndex = 0;
+ for (int j = 0; j < imgHeight; j++)
+ for (int i = 0; i < trackWidth; i++)
+ trackPix[trackIndex++] = Color.HSBtoRGB(hValue,
+ (imgHeight - j * 1f) / imgHeight,
+ bValue) | (255 << 24);
+
+ trackImage = createImage(new MemoryImageSource(trackWidth, imgHeight,
+ trackPix, 0, trackWidth));
+ }
+
+ /**
+ * This method updates the track gradient image if the Brightness value is
+ * allowed to change (according to the JRadioButtons).
+ */
+ private void updateBTrack()
+ {
+ int[] trackPix = new int[trackWidth * imgHeight];
+
+ float hValue = ((Number) hSpinner.getValue()).intValue() / 360f;
+ float sValue = ((Number) sSpinner.getValue()).intValue() / 100f;
+
+ int trackIndex = 0;
+ for (int j = 0; j < imgHeight; j++)
+ for (int i = 0; i < trackWidth; i++)
+ trackPix[trackIndex++] = Color.HSBtoRGB(hValue, sValue,
+ (imgHeight - j * 1f) / imgHeight)
+ | (255 << 24);
+
+ trackImage = createImage(new MemoryImageSource(trackWidth, imgHeight,
+ trackPix, 0, trackWidth));
+ }
+
+ /**
+ * This method returns the HSB values for the currently selected color.
+ *
+ * @return The HSB values for the currently selected color.
+ */
+ private float[] getHSBValues()
+ {
+ Color c = getColorFromModel();
+ float[] f = Color.RGBtoHSB(c.getRed(), c.getGreen(), c.getBlue(), null);
+ return f;
+ }
+}