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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.listener;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.eclipse.emf.edit.ui.dnd.LocalTransfer;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.papyrus.infra.nattable.manager.table.INattableModelManager;
import org.eclipse.papyrus.infra.nattable.utils.LocationValue;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.DropTargetListener;
import org.eclipse.swt.graphics.Point;
public class NatTableDropListener implements DropTargetListener {
private final INattableModelManager manager;
private LocationValue dropKindValue;
public NatTableDropListener(final INattableModelManager manager) {
this.manager = manager;
}
public void dragEnter(final DropTargetEvent event) {
}
public void dragLeave(final DropTargetEvent event) {
}
public void dragOperationChanged(final DropTargetEvent event) {
}
public void dragOver(final DropTargetEvent event) {
this.dropKindValue = null;
final LocalTransfer localTransfer = LocalTransfer.getInstance();
final Object data = localTransfer.nativeToJava(event.currentDataType);
IStructuredSelection structuredSelection = null;
if(data instanceof IStructuredSelection) {
structuredSelection = (IStructuredSelection)data;
}
final Collection<Object> objectsToAdd = Collections.checkedCollection(structuredSelection.toList(), Object.class);
this.dropKindValue = this.manager.getLocationInTheTable(new Point(event.x, event.y));
int drop = DND.DROP_NONE;
switch(this.dropKindValue.getKind()) {
case AFTER_COLUMN_HEADER:
if(this.manager.canDropColumnsElement(objectsToAdd)) {
drop = DND.DROP_DEFAULT;
}
break;
case AFTER_ROW_HEADER:
if(this.manager.canDropRowElement(objectsToAdd)) {
drop = DND.DROP_DEFAULT;
}
break;
case COLUMN_HEADER:
if(this.manager.canInsertColumns(objectsToAdd, this.dropKindValue.getColumnIndex())) {
drop = DND.DROP_DEFAULT;
}
break;
case ROW_HEADER:
if(this.manager.canInsertRow(objectsToAdd, this.dropKindValue.getRowIndex())) {
drop = DND.DROP_DEFAULT;
}
break;
case CELL:
//TODO
drop = DND.DROP_NONE;
break;
case UNKNOWN:
drop = DND.DROP_NONE;
break;
default:
drop = DND.DROP_NONE;
break;
}
event.detail = drop;
}
public void drop(final DropTargetEvent event) {
//we drop the elements into the table
LocalTransfer localTransfer = LocalTransfer.getInstance();
Object data = localTransfer.nativeToJava(event.currentDataType);
if(data instanceof StructuredSelection) {
final IStructuredSelection selection = (IStructuredSelection)data;
final List<Object> droppedElements = selection.toList();
if(this.dropKindValue != null) {
switch(this.dropKindValue.getKind()) {
case AFTER_COLUMN_HEADER:
this.manager.addColumns(droppedElements);
break;
case AFTER_ROW_HEADER:
this.manager.addRows(droppedElements);
break;
case COLUMN_HEADER:
this.manager.insertColumns(droppedElements, this.dropKindValue.getColumnIndex());
break;
case ROW_HEADER:
this.manager.insertRows(droppedElements, this.dropKindValue.getRowIndex());
break;
case CELL:
//TODO
break;
case UNKNOWN:
break;
default:
break;
}
}
}
this.dropKindValue = null;
}
public void dropAccept(final DropTargetEvent event) {
}
}
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