/******************************************************************************* * Copyright (c) 2010 Oak Ridge National Laboratory. * 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 ******************************************************************************/ package org.csstudio.swt.xygraph.undo; import java.util.ArrayList; import java.util.List; import org.csstudio.swt.xygraph.figures.Axis; import org.csstudio.swt.xygraph.linearscale.Range; /**The command for graph zooming and panning. * @author Xihui Chen * @author Kay Kasemir (allow <code>null</code> for x axis) */ public class ZoomCommand extends SaveStateCommand { final private List<Axis> xAxisList; final private List<Axis> yAxisList; final private List<Range> beforeXRangeList = new ArrayList<Range>(); final private List<Range> beforeYRangeList = new ArrayList<Range>(); final private List<Range> afterXRangeList = new ArrayList<Range>(); final private List<Range> afterYRangeList = new ArrayList<Range>(); /** Initialize * @param name Name of operation for undo/redo GUI * @param xAxisList X Axes to save or <code>null</code> * @param yAxisList Y Axes to save */ public ZoomCommand(final String name, final List<Axis> xAxisList, final List<Axis> yAxisList) { super(name); this.xAxisList = xAxisList; this.yAxisList = yAxisList; saveOriginalState(); } private void saveOriginalState(){ if (xAxisList != null) for(Axis axis : xAxisList) beforeXRangeList.add(axis.getRange()); for(Axis axis : yAxisList) beforeYRangeList.add(axis.getRange()); } public void redo() { int i=0; if (xAxisList != null) { for(Axis axis : xAxisList){ axis.setRange(afterXRangeList.get(i)); i++; } } i=0; for(Axis axis : yAxisList){ axis.setRange(afterYRangeList.get(i)); i++; } } public void undo() { int i=0; if (xAxisList != null) { for(Axis axis : xAxisList){ axis.setRange(beforeXRangeList.get(i)); i++; } } i=0; for(Axis axis : yAxisList){ axis.setRange(beforeYRangeList.get(i)); i++; } } @Override public void saveState(){ if (xAxisList != null) for(Axis axis : xAxisList) afterXRangeList.add(axis.getRange()); for(Axis axis : yAxisList) afterYRangeList.add(axis.getRange()); } }