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/*****************************************************************************
* Copyright (c) 2010 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:
* Remi Schnekenburger (CEA LIST) remi.schnekenburger@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.properties.runtime.propertyeditor;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.papyrus.properties.runtime.Activator;
import org.eclipse.papyrus.properties.runtime.propertyeditor.descriptor.IBoundedValuesPropertyEditorDescriptor;
import org.eclipse.papyrus.properties.runtime.propertyeditor.descriptor.IPropertyEditorDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
/**
* Property editors for enumeration
*/
public class ComboPropertyEditor extends AbstractPropertyEditor {
/** id of this editor */
public static final String ID = "org.eclipse.papyrus.properties.runtime.comboPropertyEditor";
/** main composite created by this property editor */
private Composite composite;
/** list of available elements */
protected List<String> values = new ArrayList<String>();
/** combo that edit values */
private CCombo combo;
/**
* {@inheritDoc}
*/
@Override
public Composite createContent(Composite parent) {
composite = getWidgetFactory().createComposite(parent, SWT.NONE);
int columnNu = getColumnNumber();
GridLayout layout = new GridLayout(columnNu, false);
layout.marginHeight = 0;
layout.marginWidth = 0;
composite.setLayout(layout);
GridData data = new GridData(SWT.FILL, SWT.FILL, true, false);
composite.setLayoutData(data);
if((getDescriptor().getLabelPosition() & (SWT.LEFT | SWT.TOP)) != 0) {
createLabel(composite);
}
combo = getWidgetFactory().createCCombo(composite, SWT.FLAT | SWT.BORDER | SWT.READ_ONLY);
combo.setItems(values.toArray(new String[]{}));
data = new GridData(SWT.FILL, SWT.FILL, true, false);
combo.setLayoutData(data);
getWidgetFactory().adapt(combo);
combo.addFocusListener(new FocusListener() {
public void focusLost(FocusEvent e) {
handleContentChanged();
}
public void focusGained(FocusEvent e) {
}
});
combo.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
handleContentChanged();
}
public void widgetDefaultSelected(SelectionEvent e) {
}
});
combo.setEnabled(!getIsReadOnly());
if((getDescriptor().getLabelPosition() & (SWT.RIGHT | SWT.BOTTOM)) != 0) {
createLabel(composite);
}
combo.setToolTipText(getTooltipText());
return composite;
}
/**
* Returns the number of column for the composite
*
* @return the number of column for the composite
*/
protected int getColumnNumber() {
if((getDescriptor().getLabelPosition() & (SWT.TOP | SWT.BOTTOM)) != 0) {
return 1;
}
return 2;
}
/**
* {@inheritDoc}
*/
@Override
public void dispose() {
if(isValid(composite)) {
composite.dispose();
composite = null;
setController(null);
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean isDisposed() {
if(composite == null) {
return true;
}
return composite.isDisposed();
}
/**
* Returns the current String value or <code>null</code> if no elements were selected
*/
@Override
public Object getValue() {
if(isValid(combo)) {
int index = combo.getSelectionIndex();
if(index >= 0 && index < values.size()) {
return values.get(index);
}
} else {
Activator.log.error("trying to read the value of the combo whereas the combo is disposed", null);
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
public void handleContentChanged() {
// this should tells the controller that the input has to be applied to the model
getController().updateModel();
}
/**
* {@inheritDoc}
*/
@Override
public IStatus init(IPropertyEditorDescriptor descriptor) {
setDescriptor(descriptor);
setTooltipText(descriptor.getTooltipText());
if(descriptor instanceof IBoundedValuesPropertyEditorDescriptor) {
List<?> values = ((IBoundedValuesPropertyEditorDescriptor)descriptor).getAvailableValues();
if(values != null) {
for(Object object : values) {
this.values.add(object.toString());
}
}
return Status.OK_STATUS;
}
return new Status(IStatus.ERROR, Activator.ID, "Impossible to initialize the editor using descriptor :" + descriptor);
}
/**
* {@inheritDoc}
*/
@Override
public void setValue(Object valueToEdit) {
if(!isValid(combo)) {
return;
}
if(valueToEdit instanceof String) {
String newValue = (String)valueToEdit;
if(values == null) {
return;
}
int index = values.indexOf(newValue);
if(index >= 0) {
combo.select(values.indexOf(newValue));
} else {
Activator.log.error("Impossible to get the value " + valueToEdit + " in the list of available values", null);
}
}
}
}
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