/*
* Created on 02.10.2003
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package com.liferay.ide.velocity.preferences;
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;
/**
* A "button" of a certain color determined by the color picker.
*/
public class VelocityColorEditor
{
private Point fExtent;
private Image fImage;
private RGB fColorValue;
private Color fColor;
private Button fButton;
public VelocityColorEditor(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;
}
}
});
}
/**
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*/
public RGB getColorValue()
{
return fColorValue;
}
/**
* DOCUMENT ME!
*
* @param rgb
* DOCUMENT ME!
*/
public void setColorValue(RGB rgb)
{
fColorValue = rgb;
updateColorImage();
}
/**
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*/
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;
}
}