/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.libraries.designtime.swing.colorchooser;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
public class HSBColorSelectorPanel extends JComponent {
public enum ColorComponents {
HUE, SATURATION, BRIGHTNESS
}
private class MouseHandler extends MouseAdapter {
private MouseHandler() {
}
public void mouseClicked( final MouseEvent e ) {
handleMouse( e );
}
private void handleMouse( final MouseEvent e ) {
if ( e.getButton() != MouseEvent.BUTTON1 ) {
return;
}
if ( getWidth() == 0 || getHeight() == 0 ) {
return;
}
if ( e.getX() > getWidth() ) {
return;
}
if ( e.getY() > getHeight() ) {
return;
}
if ( colorSelectionModel == null ) {
return;
}
final float x = e.getX() / (float) getWidth();
final float y = e.getY() / (float) getHeight();
final float[] color = computeColor( getSelectedComponent(), (int) ( x * 360 ), (int) ( 360 - ( y * 360 ) ) );
colorSelectionModel.setHSB( (int) ( color[ 0 ] * 360 ), (int) ( color[ 1 ] * 100 ), (int) ( color[ 2 ] * 100 ) );
lastPointX = x;
lastPointY = y;
repaint();
}
public void mouseDragged( final MouseEvent e ) {
handleMouse( e );
}
}
private class ColorSelectionHandler implements ChangeListener {
private ColorSelectionHandler() {
}
public void stateChanged( final ChangeEvent e ) {
if ( selection != null ) {
if ( ( selection[ 0 ] == colorSelectionModel.getHue() ) &&
( selection[ 1 ] == colorSelectionModel.getSaturation() ) &&
( selection[ 2 ] == colorSelectionModel.getValue() ) ) {
return;
}
}
selection =
new int[] { colorSelectionModel.getHue(), colorSelectionModel.getSaturation(), colorSelectionModel.getValue() };
final float[] point = computeSelectedPosition();
lastPointX = point[ 0 ];
lastPointY = point[ 1 ];
updateImage();
repaint();
}
}
private ColorSelectionHandler colorSelectionHandler;
private ExtendedColorModel colorSelectionModel;
private BufferedImage backend;
private ColorComponents component;
private int[] selection;
private float lastPointX;
private float lastPointY;
public HSBColorSelectorPanel() {
backend = new BufferedImage( 360, 360, BufferedImage.TYPE_INT_RGB );
component = ColorComponents.HUE;
colorSelectionHandler = new ColorSelectionHandler();
addMouseListener( new MouseHandler() );
addMouseMotionListener( new MouseHandler() );
updateImage();
}
public ColorComponents getComponent() {
return component;
}
public void setComponent( final ColorComponents component ) {
if ( component == null ) {
throw new NullPointerException();
}
this.component = component;
updateImage();
repaint();
}
private float[] computeColor( final float selectedValue, final int x, final int y ) {
if ( component == ColorComponents.HUE ) {
return new float[] { selectedValue, x / 360f, y / 360f };
} else if ( component == ColorComponents.SATURATION ) {
return new float[] { x / 360f, selectedValue, y / 360f };
} else if ( component == ColorComponents.BRIGHTNESS ) {
return new float[] { x / 360f, y / 360f, selectedValue };
}
throw new IllegalStateException();
}
private void updateImage() {
final float selectedComponent = getSelectedComponent();
for ( int x = 0; x < 360; x++ ) {
for ( int y = 0; y < 360; y++ ) {
final float[] floats = computeColor( selectedComponent, x, y );
backend.setRGB( x, 359 - y, Color.HSBtoRGB( floats[ 0 ], floats[ 1 ], floats[ 2 ] ) );
}
}
}
private float getSelectedComponent() {
final float selectedComponent;
if ( selection == null ) {
selectedComponent = 0.5f;
} else {
final float[] hsb = new float[] {
selection[ 0 ] / 360f, selection[ 1 ] / 100f, selection[ 2 ] / 100f };
switch( component ) {
case HUE:
selectedComponent = hsb[ 0 ];
break;
case SATURATION:
selectedComponent = hsb[ 1 ];
break;
case BRIGHTNESS:
selectedComponent = hsb[ 2 ];
break;
default:
selectedComponent = 0.5f;
}
}
return selectedComponent;
}
public ExtendedColorModel getColorSelectionModel() {
return colorSelectionModel;
}
public void setColorSelectionModel( final ExtendedColorModel colorSelectionModel ) {
if ( this.colorSelectionModel != null ) {
this.colorSelectionModel.removeChangeListener( colorSelectionHandler );
}
this.colorSelectionModel = colorSelectionModel;
if ( this.colorSelectionModel != null ) {
this.colorSelectionModel.addChangeListener( colorSelectionHandler );
this.selection = new int[]
{ colorSelectionModel.getHue(), colorSelectionModel.getSaturation(), colorSelectionModel.getValue() };
final float[] point = computeSelectedPosition();
this.lastPointX = point[ 0 ];
this.lastPointY = point[ 1 ];
updateImage();
}
}
protected void paintComponent( final Graphics g ) {
g.drawImage( backend, 0, 0, getWidth(), getHeight(), this );
if ( selection != null ) {
final float[] floats = new float[] {
selection[ 0 ] / 360f, selection[ 1 ] / 100f, selection[ 2 ] / 100f };
floats[ 1 ] = 0;
if ( floats[ 2 ] < 0.5f ) {
floats[ 2 ] = 1;
} else {
floats[ 2 ] = 0;
}
final Graphics graphics = g.create();
graphics.setColor( Color.getHSBColor( floats[ 0 ], floats[ 1 ], floats[ 2 ] ) );
graphics.drawOval( (int) ( ( lastPointX * getWidth() ) - 2 ), (int) ( ( lastPointY * getHeight() ) - 2 ), 4, 4 );
graphics.dispose();
}
}
private float[] computeSelectedPosition() {
if ( selection == null ) {
return null;
}
final float[] floats = new float[] {
selection[ 0 ] / 360f, selection[ 1 ] / 100f, selection[ 2 ] / 100f };
switch( component ) {
case HUE:
return new float[] { floats[ 1 ], ( 1 - floats[ 2 ] ) };
case SATURATION:
return new float[] { floats[ 0 ], ( 1 - floats[ 2 ] ) };
case BRIGHTNESS:
return new float[] { floats[ 0 ], ( 1 - floats[ 1 ] ) };
default:
return null;
}
}
public Dimension getPreferredSize() {
return new Dimension( 360, 360 );
}
public Dimension getMinimumSize() {
return new Dimension( 360, 360 );
}
}