/*******************************************************************************
* Copyright (c) 2001, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Jens Lukowski/Innoopract - initial renaming/restructuring
*
*******************************************************************************/
package org.eclipse.wst.sse.ui.internal.preferences.ui;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.accessibility.ACC;
import org.eclipse.swt.accessibility.AccessibleControlAdapter;
import org.eclipse.swt.accessibility.AccessibleControlEvent;
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.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.
*/
public class ColorEditor {
Button fButton;
Color fColor;
RGB fColorValue;
private Point fExtent;
Image fImage;
public ColorEditor(Composite parent) {
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);
// bug2541 - associate color value to button's value field
fButton.getAccessible().addAccessibleControlListener(new AccessibleControlAdapter() {
/**
* @see org.eclipse.swt.accessibility.AccessibleControlAdapter#getValue(AccessibleControlEvent)
*/
public void getValue(AccessibleControlEvent e) {
if (e.childID == ACC.CHILDID_SELF) {
if (getColorValue() != null)
e.result = getColorValue().toString();
else
e.result = null;
}
}
});
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();
}
}
});
fButton.addDisposeListener(new DisposeListener() {
public void widgetDisposed(DisposeEvent event) {
if (fImage != null) {
fImage.dispose();
fImage = null;
}
if (fColor != null) {
fColor.dispose();
fColor = null;
}
}
});
}
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;
}
public Button getButton() {
return fButton;
}
public RGB getColorValue() {
return fColorValue;
}
public void setColorValue(RGB rgb) {
fColorValue = rgb;
updateColorImage();
}
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);
}
}