/*******************************************************************************
* Copyright (c) 2012, 2014 Original authors and others.
* 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:
* Original authors and others - initial API and implementation
* Dirk Fauth <dirk.fauth@googlemail.com> - Bug 446476
******************************************************************************/
package org.eclipse.nebula.widgets.nattable.extension.glazedlists.groupBy.action;
import org.eclipse.nebula.widgets.nattable.NatTable;
import org.eclipse.nebula.widgets.nattable.extension.glazedlists.groupBy.GroupByHeaderLayer;
import org.eclipse.nebula.widgets.nattable.extension.glazedlists.groupBy.command.GroupByColumnIndexCommand;
import org.eclipse.nebula.widgets.nattable.layer.LabelStack;
import org.eclipse.nebula.widgets.nattable.ui.action.IDragMode;
import org.eclipse.swt.events.MouseEvent;
/**
* IDragMode for enabling the groupBy feature. This IDragMode supports dragging
* of a column to the groupBy region and executes the
* {@link GroupByColumnIndexCommand} on mouseUp.
* <p>
* It is typically registered to the column header region.
* </p>
*/
public class GroupByDragMode implements IDragMode {
private int selectedColumnIndex = -1;
@Override
public void mouseDown(NatTable natTable, MouseEvent event) {
int columnPosition = natTable.getColumnPositionByX(event.x);
this.selectedColumnIndex = natTable
.getColumnIndexByPosition(columnPosition);
}
@Override
public void mouseMove(NatTable natTable, MouseEvent event) {}
@Override
public void mouseUp(NatTable natTable, MouseEvent event) {
LabelStack regionLabels = natTable
.getRegionLabelsByXY(event.x, event.y);
if (regionLabels != null
&& regionLabels.hasLabel(GroupByHeaderLayer.GROUP_BY_REGION)
&& this.selectedColumnIndex != -1) {
natTable.doCommand(new GroupByColumnIndexCommand(
this.selectedColumnIndex));
this.selectedColumnIndex = -1;
}
}
}