hydrograph.ui.graph.command.CommentBoxSetConstraintCommand.java Source code

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Here is the source code for hydrograph.ui.graph.command.CommentBoxSetConstraintCommand.java

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/*******************************************************************************
 * Copyright 2017 Capital One Services, LLC and Bitwise, Inc.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/

package hydrograph.ui.graph.command;

import org.apache.commons.lang.StringUtils;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.RequestConstants;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.ChangeBoundsRequest;

import hydrograph.ui.graph.model.CommentBox;

/**
 * The Class ComponentSetConstraintCommand.
 * @author BITWISE
 */
public class CommentBoxSetConstraintCommand extends Command {
    /** Stores the new size and location. */
    private final Rectangle newBounds;
    /** Stores the old size and location. */
    private Rectangle oldBounds;
    /** A request to move/resize an edit part. */
    private final ChangeBoundsRequest request;

    /** Shape to manipulate. */
    private final CommentBox shape;

    private Dimension newSize;
    private Dimension oldSize;

    /**
     * Create a command that can resize and/or move a shape.
     * 
     * @param shape the shape to manipulate
     * @param request the move and resize request
     * @param newBounds the new size and location
     * @throws IllegalArgumentException if any of the parameters is null
     */
    public CommentBoxSetConstraintCommand(CommentBox shape, ChangeBoundsRequest request, Rectangle newBounds) {
        if (shape == null || request == null || newBounds == null) {
            throw new IllegalArgumentException();
        }
        this.shape = shape;
        this.request = request;
        this.newBounds = newBounds.getCopy();
        this.newSize = newBounds.getSize();
        setLabel("move / resize");
    }

    @Override
    public boolean canExecute() {
        Object type = request.getType();
        // make sure the Request is of a type we support:
        return (StringUtils.equals(RequestConstants.REQ_MOVE, (String) type)
                || StringUtils.equals(RequestConstants.REQ_MOVE_CHILDREN, (String) type)
                || StringUtils.equals(RequestConstants.REQ_RESIZE_CHILDREN, (String) type)
                || StringUtils.equals(RequestConstants.REQ_RESIZE, (String) type));
    }

    @Override
    public void execute() {
        oldSize = shape.getSize();
        oldBounds = new Rectangle(shape.getLocation(), shape.getSize());
        redo();
    }

    @Override
    public void redo() {
        shape.setSize(newSize);
        shape.setLocation(newBounds.getLocation());
    }

    @Override
    public void undo() {
        shape.setSize(oldSize);
        shape.setLocation(oldBounds.getLocation());
    }

    @Override
    public String getLabel() {
        if (oldSize.equals(newSize))
            return "Move Object";
        return "Resize Object";
    }
}