package net.sourceforge.sqlexplorer.preferences;
/*
* Copyright (C) 2002-2004 Andrea Mazzolini
* andreamazzolini@users.sourceforge.net
*
* This program 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
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.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;
public class ColorEditor {
private Point fExtent;
Image fImage;
RGB fColorValue;
Color fColor;
Button fButton;
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);
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;
}
}
});
}
public RGB getColorValue() {
return fColorValue;
}
public void setColorValue(RGB rgb) {
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;
}
}