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/*******************************************************************************
* Copyright (c) 2012 CEA LIST.
* 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:
* Nicolas Bros (Mia-Software) - Bug 375388 - Cell editor for IImage
*******************************************************************************/
package org.eclipse.emf.facet.custom.sdk.ui.internal.widgets.celleditors.composite;
import org.eclipse.emf.facet.custom.metamodel.custompt.IImage;
import org.eclipse.emf.facet.custom.sdk.ui.internal.Messages;
import org.eclipse.emf.facet.custom.ui.ImageUtils;
import org.eclipse.emf.facet.widgets.celleditors.AbstractCellEditorComposite;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
/** A composite for displaying an {@link IImage} (read-only for now) */
public class ImageComposite extends AbstractCellEditorComposite<IImage> {
private final Button compositeButton;
private final Canvas compositeCanvas;
private IImage valueImage;
protected Button getButton() {
return this.compositeButton;
}
public Canvas getCanvas() {
return this.compositeCanvas;
}
public ImageComposite(final Composite parent) {
super(parent);
final GridLayout layout = new GridLayout(2, false);
layout.marginWidth = 0;
layout.marginHeight = 0;
layout.horizontalSpacing = 0;
setLayout(layout);
this.compositeCanvas = createCanvas(this);
this.compositeButton = createButton(this);
// disposes the composite when the user clicks
final Listener disposeListener = new Listener() {
public void handleEvent(final Event event) {
if (event.widget instanceof Control) {
final Control control = (Control) event.widget;
if (control.getShell() == getParent().getShell() && event.widget != getButton() && event.widget != getCanvas()) {
ImageComposite.this.dispose();
Display.getDefault().removeFilter(SWT.MouseDown, this);
}
}
}
};
Display.getDefault().addFilter(SWT.MouseDown, disposeListener);
}
protected Canvas createCanvas(final Composite parent) {
final Canvas canvas = new Canvas(parent, SWT.NONE);
canvas.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
canvas.addPaintListener(new PaintListener() {
public void paintControl(final PaintEvent e) {
final Image img = getImage();
if (img != null && !img.isDisposed()) {
e.gc.drawImage(img, 0, 0);
}
}
});
return canvas;
}
protected Button createButton(final Composite parent) {
final Button button = new Button(parent, SWT.PUSH);
button.setText("+"); //$NON-NLS-1$
final GridData data = new GridData(SWT.FILL, SWT.FILL, false, true);
button.setLayoutData(data);
button.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(final SelectionEvent e) {
openShell();
}
});
return button;
}
protected void openShell() {
final Shell shell = new Shell();
shell.setText(Messages.ImageComposite_fullImage);
shell.setLayout(new GridLayout());
final Canvas shellCanvas = createCanvas(shell);
final GridData canvasData = new GridData(SWT.FILL, SWT.FILL, true, true);
final Image img = getImage();
if (img != null && !img.isDisposed()) {
canvasData.widthHint = img.getBounds().width;
canvasData.heightHint = img.getBounds().height;
}
shellCanvas.setLayoutData(canvasData);
shell.pack();
shell.open();
}
protected Image getImage() {
return ImageUtils.unwrap(this.valueImage);
}
public IImage getValue() {
return this.valueImage;
}
public void setValue(final IImage value) {
this.valueImage = value;
}
}
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