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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:
* Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.nattable.provider;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.nebula.widgets.nattable.coordinate.PositionCoordinate;
import org.eclipse.nebula.widgets.nattable.layer.ILayerListener;
import org.eclipse.nebula.widgets.nattable.layer.cell.ILayerCell;
import org.eclipse.nebula.widgets.nattable.layer.event.ILayerEvent;
import org.eclipse.nebula.widgets.nattable.selection.SelectionLayer;
import org.eclipse.nebula.widgets.nattable.selection.event.CellSelectionEvent;
import org.eclipse.nebula.widgets.nattable.selection.event.ColumnSelectionEvent;
import org.eclipse.nebula.widgets.nattable.selection.event.ISelectionEvent;
import org.eclipse.nebula.widgets.nattable.selection.event.RowSelectionEvent;
import org.eclipse.papyrus.infra.nattable.manager.table.INattableModelManager;
import org.eclipse.papyrus.infra.nattable.utils.AxisUtils;
import org.eclipse.papyrus.infra.nattable.utils.TableSelectionWrapper;
import org.eclipse.ui.services.IDisposable;
/**
*
* The selection provider used by the table. The returned selection is used to display property views or to do the synchronization in the
* ModelExplorer
*
*/
public class TableSelectionProvider implements ISelectionProvider, IDisposable {
/**
* the selection layer used in the table
*/
private SelectionLayer selectionLayer;
/**
* the selection listener
*/
private final ILayerListener selectionListener;
/**
* the current selection in the table
*/
private ISelection currentSelection;
/**
* the list of listener on the selections
*/
private final List<ISelectionChangedListener> listeners;
/**
* the table model manager to use to find selected elements
*/
private INattableModelManager manager;
/**
*
* Constructor.
*
* @param manager
* the table model manager to use to find selected elements
* @param selectionLayer
*/
public TableSelectionProvider(final INattableModelManager manager, final SelectionLayer selectionLayer) {
this.selectionLayer = selectionLayer;
this.selectionListener = new ILayerListener() {
public void handleLayerEvent(final ILayerEvent event) {
calculateAndStoreNewSelection(event);
}
};
this.selectionLayer.addLayerListener(this.selectionListener);
this.currentSelection = new StructuredSelection();
this.listeners = new ArrayList<ISelectionChangedListener>();
this.manager = manager;
}
/**
*
* @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
*
* @param listener
*/
public void addSelectionChangedListener(final ISelectionChangedListener listener) {
this.listeners.add(listener);
}
/**
*
* @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
*
* @return
*/
public synchronized ISelection getSelection() {
return this.currentSelection;
}
/**
*
* @see org.eclipse.jface.viewers.ISelectionProvider#removeSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
*
* @param listener
*/
public void removeSelectionChangedListener(final ISelectionChangedListener listener) {
this.listeners.remove(listener);
}
/**
*
* @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
*
* @param selection
*/
public synchronized void setSelection(final ISelection selection) {
if(this.currentSelection.equals(selection)) {
return;
}
this.currentSelection = selection;
final SelectionChangedEvent event = new SelectionChangedEvent(this, this.currentSelection);
for(final ISelectionChangedListener current : this.listeners) {
current.selectionChanged(event);
}
}
protected/* synchronized */void calculateAndStoreNewSelection(final ILayerEvent event) {
//the list of the selected elements
final List<Object> selection = new ArrayList<Object>();
final ISelection newSelection;
if(event instanceof ISelectionEvent) {
//add the cell selection
final Collection<PositionCoordinate> selectedCells = Arrays.asList(this.selectionLayer.getSelectedCellPositions());
final TableSelectionWrapper wrapper = new TableSelectionWrapper(selectedCells);
//we returns the contents of the last selected cell
//we could returns the contents of all selected cells if its required
if(event instanceof CellSelectionEvent) {
for(final PositionCoordinate current1 : this.selectionLayer.getSelectedCellPositions()) {
final int colPos = current1.getColumnPosition();
final int rowPos = current1.getRowPosition();
final ILayerCell cell = this.selectionLayer.getCellByPosition(colPos, rowPos);
if(cell != null) {
final Object value = cell.getDataValue();
if(value != null) {
if(value instanceof Collection<?>) {
final Iterator<?> iter = ((Collection<?>)value).iterator();
while(iter.hasNext()) {
final Object current = iter.next();
selection.add(current);
}
} else {
selection.add(value);
}
}
}
}
} else if(event instanceof RowSelectionEvent) {
this.selectionLayer.getFullySelectedRowPositions();
int[] rows = this.selectionLayer.getFullySelectedRowPositions();
for(int i : rows) {
Object el = this.manager.getRowElement(i);
if(el != null) {
el = AxisUtils.getRepresentedElement(el);
selection.add(el);
}
}
} else if(event instanceof ColumnSelectionEvent) {
int[] selectedColumn = this.selectionLayer.getFullySelectedColumnPositions();
for(int i : selectedColumn) {
Object el = this.manager.getColumnElement(i);
if(el != null) {
el = AxisUtils.getRepresentedElement(el);
selection.add(el);
}
}
}
newSelection = new TableStructuredSelection(selection, wrapper);
} else {
newSelection = new StructuredSelection();
}
setSelection(newSelection);
}
/**
*
* @see org.eclipse.ui.services.IDisposable#dispose()
*
*/
public void dispose() {
this.selectionLayer.removeLayerListener(this.selectionListener);
this.selectionLayer = null;
}
}
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