/*******************************************************************************
* Copyright (c) 2010 Neil Bartlett.
* 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:
* Neil Bartlett - initial API and implementation
******************************************************************************/
package bndtools.editor.common;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.Map;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
public class MapEntryCellModifier<K, V> implements ICellModifier {
private final PropertyChangeSupport propertySupport = new PropertyChangeSupport(this);
private static final String PROP_NAME = "NAME";
private static final String PROP_VALUE = "VALUE";
private static final String[] PROPS = new String[] {
PROP_NAME, PROP_VALUE
};
private static final String[] LABELS = new String[] {
"Name", "Value"
};
private TableViewer viewer;
public MapEntryCellModifier(TableViewer viewer) {
this.viewer = viewer;
}
public boolean canModify(Object element, String property) {
return PROP_NAME.equals(property) || PROP_VALUE.equals(property);
}
public Object getValue(Object element, String property) {
Object result = null;
@SuppressWarnings("unchecked")
K key = (K) element;
if (PROP_NAME.equals(property)) {
result = key;
} else if (PROP_VALUE.equals(property)) {
@SuppressWarnings("unchecked")
Map<K,V> map = (Map<K,V>) viewer.getInput();
result = map.get(key);
}
if (result == null)
result = "";
return result;
}
public void modify(Object element, String property, Object editResult) {
@SuppressWarnings("unchecked")
Map<K,V> map = (Map<K,V>) viewer.getInput();
Object e = element;
if (e instanceof Item) {
e = ((Item) e).getData();
}
@SuppressWarnings("unchecked")
K key = (K) e;
boolean changed = false;
if (PROP_VALUE.equals(property)) {
@SuppressWarnings("unchecked")
V newValue = (V) editResult;
V previous = map.put(key, newValue);
changed = (newValue == null && previous != null) || (newValue != null && !newValue.equals(previous));
viewer.refresh(key);
} else if (PROP_NAME.equals(property)) {
if (!e.equals(editResult)) {
V value = map.remove(key);
viewer.remove(key);
@SuppressWarnings("unchecked")
K newKey = (K) editResult;
map.put(newKey, value);
viewer.add(newKey);
changed = true;
}
}
if (changed)
propertySupport.firePropertyChange(property, null, editResult);
}
public void addColumnsToTable() {
Table table = viewer.getTable();
for (String label : LABELS) {
TableColumn col = new TableColumn(table, SWT.NONE);
col.setText(label);
col.setWidth(120);
}
}
public static String[] getColumnProperties() {
return PROPS;
}
public void addCellEditorsToViewer() {
CellEditor[] cellEditors = new CellEditor[PROPS.length];
for (int i = 0; i < PROPS.length; i++) {
cellEditors[i] = new TextCellEditor(viewer.getTable());
}
viewer.setCellEditors(cellEditors);
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
propertySupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
propertySupport.removePropertyChangeListener(listener);
}
}