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/*****************************************************************************
* Copyright (c) 2014 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.widgets.editors;
import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.eclipse.core.databinding.observable.ChangeEvent;
import org.eclipse.core.databinding.observable.IChangeListener;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeListener;
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.Button;
import org.eclipse.swt.widgets.Composite;
/**
* A Widget to manipulate a list of values.
*
* The widget is configured with a Map of (String, String) entries (Key -> Label).
* It returns the list of selected keys.
*
* @author Camille Letavernier
*/
public class StringMask extends AbstractListEditor implements SelectionListener, IChangeListener, DisposeListener {
private Button[] checkboxes;
private Collection<String> currentValue;
private final Composite checkboxContainer;
private boolean refreshCheckboxes = true;
private boolean isReadOnly = false;
public static final String DATA_KEY = "stringValue"; //$NON-NLS-1$
public StringMask(final Composite parent, final int style) {
super(parent, style);
checkboxContainer = new Composite(this, style);
checkboxContainer.setLayoutData(getDefaultLayoutData());
checkboxContainer.setLayout(new GridLayout(2, true));
checkboxContainer.addDisposeListener(this);
}
@Override
protected GridData getLabelLayoutData() {
GridData data = super.getLabelLayoutData();
data.verticalAlignment = SWT.BEGINNING;
return data;
}
public Collection<String> getValue() {
Set<String> values = new HashSet<String>();
for(Button button : checkboxes) {
if(button.getSelection()) {
String value = (String)button.getData(DATA_KEY);
values.add(value);
}
}
return values;
}
@Override
public void dispose() {
if(modelProperty != null) {
modelProperty.removeChangeListener(this);
}
super.dispose();
}
@Override
public Object getEditableType() {
return String.class;
}
@Override
public void setReadOnly(final boolean readOnly) {
this.isReadOnly = readOnly;
for(Button button : checkboxes) {
button.setEnabled(!readOnly);
}
}
@Override
public boolean isReadOnly() {
return isReadOnly;
}
public void setMasks(final Map<String, String> values) {
if(checkboxes != null) {
disposeCheckboxes();
}
checkboxes = new Button[values.size()];
int i = 0;
for(Entry<String, String> mask : values.entrySet()) {
String stringValue = mask.getKey();
String label = mask.getValue();
checkboxes[i] = new Button(checkboxContainer, SWT.CHECK);
checkboxes[i].setText(label);
checkboxes[i].setData(DATA_KEY, stringValue);
checkboxes[i].addSelectionListener(this);
checkboxes[i].setToolTipText(stringValue);
i++;
}
}
protected void disposeCheckboxes() {
for(Button button : checkboxes) {
button.removeSelectionListener(this);
button.dispose();
}
}
public void setNumColumns(final int numColumns) {
((GridLayout)checkboxContainer.getLayout()).numColumns = numColumns;
checkboxContainer.layout();
layout();
}
@Override
public void doBinding() {
// We don't do a real databinding here
modelProperty.addChangeListener(this);
refreshCheckboxes();
}
protected void refreshCheckboxes() {
if(!refreshCheckboxes) {
return;
}
Collection<String> values = getCurrentValue();
for(Button button : checkboxes) {
String value = (String)button.getData(DATA_KEY);
button.setSelection(values.contains(value));
}
}
@Override
public void setToolTipText(final String text) {
super.setLabelToolTipText(text);
}
@Override
public void widgetSelected(final SelectionEvent e) {
Button button = (Button)e.widget;
String value = (String)button.getData(DATA_KEY);
Collection<String> values = new HashSet<String>(getCurrentValue());
if(button.getSelection()) {
values.add(value);
} else {
values.remove(value);
}
setCurrentValue(values);
}
protected void setCurrentValue(final Collection<String> values) {
if(modelProperty != null) {
refreshCheckboxes = false;
modelProperty.clear();
modelProperty.addAll(values);
refreshCheckboxes = true;
}
currentValue = values;
commit();
}
protected Collection<String> getCurrentValue() {
if(modelProperty != null) {
return modelProperty;
} else {
return currentValue;
}
}
@Override
public void widgetDefaultSelected(final SelectionEvent e) {
// Nothing
}
public int getNumColumns() {
return ((GridLayout)checkboxContainer.getLayout()).numColumns;
}
@Override
public void handleChange(final ChangeEvent event) {
refreshCheckboxes();
}
/**
* @see org.eclipse.papyrus.infra.widgets.editors.AbstractEditor#changeColorField()
*
*/
@Override
public void changeColorField() {
// TODO Auto-generated method stub
}
}
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