/*
* uDig - User Friendly Desktop Internet GIS client http://udig.refractions.net (C) 2004,
* Refractions Research Inc. This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the Free Software
* Foundation; version 2.1 of the License. This library 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.
*/
package org.geotools.swt.styling.simple;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.ColorDialog;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
/**
* A "button" of a certain color determined by the color picker.
*
*
*
* @source $URL$
*/
public class StolenColorEditor {
private Point fExtent;
private Image fImage;
private RGB fColorValue;
private Color fColor;
private Button fButton;
private SelectionListener listener;
public StolenColorEditor( Composite parent ) {
this( parent, null );
}
public StolenColorEditor( Composite parent, SelectionListener parentListener ) {
this.listener = parentListener;
fButton = new Button(parent, SWT.PUSH);
fExtent = computeImageSize(parent);
fImage = new Image(parent.getDisplay(), fExtent.x, fExtent.y);
GC gc = new GC(fImage);
gc.setBackground(fButton.getBackground());
gc.fillRectangle(0, 0, fExtent.x, fExtent.y);
gc.dispose();
fButton.setImage(fImage);
fButton.addSelectionListener(new SelectionAdapter(){
public void widgetSelected( SelectionEvent event ) {
ColorDialog colorDialog = new ColorDialog(fButton.getShell());
colorDialog.setRGB(fColorValue);
RGB newColor = colorDialog.open();
if (newColor != null) {
fColorValue = newColor;
updateColorImage();
}
notifyParent(event);
}
});
fButton.addDisposeListener(new DisposeListener(){
public void widgetDisposed( DisposeEvent event ) {
if (fImage != null) {
fImage.dispose();
fImage = null;
}
if (fColor != null) {
fColor.dispose();
fColor = null;
}
}
});
}
public void setListener( SelectionListener newListener ) {
listener = newListener;
}
private void notifyParent( SelectionEvent event ) {
if( listener != null )
listener.widgetSelected(event);
}
public java.awt.Color getColor(){
RGB rgb = getColorValue();
return new java.awt.Color( rgb.red, rgb.green, rgb.blue);
}
public void setColor( java.awt.Color color ){
if( color == null ){
setColorValue( null );
}
else {
RGB rgb = new RGB(color.getRed(), color.getGreen(), color.getBlue() );
setColorValue( rgb );
}
}
public void setEnabled( boolean isEnabled ){
getButton().setEnabled( isEnabled );
}
public RGB getColorValue() {
return fColorValue;
}
public void setColorValue( RGB rgb ) {
if( rgb == null ){
rgb = new RGB(0,0,0);
}
fColorValue = rgb;
updateColorImage();
}
public Button getButton() {
return fButton;
}
protected void updateColorImage() {
Display display = fButton.getDisplay();
GC gc = new GC(fImage);
gc.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
gc.drawRectangle(0, 2, fExtent.x - 1, fExtent.y - 4);
if (fColor != null)
fColor.dispose();
fColor = new Color(display, fColorValue);
gc.setBackground(fColor);
gc.fillRectangle(1, 3, fExtent.x - 2, fExtent.y - 5);
gc.dispose();
fButton.setImage(fImage);
}
protected Point computeImageSize( Control window ) {
GC gc = new GC(window);
Font f = JFaceResources.getFontRegistry().get(JFaceResources.DEFAULT_FONT);
gc.setFont(f);
int height = gc.getFontMetrics().getHeight();
gc.dispose();
Point p = new Point(height * 3 - 6, height);
return p;
}
}