/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org
This file is part of Gephi.
DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
Copyright 2011 Gephi Consortium. All rights reserved.
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General Public License Version 3 only ("GPL") or the Common
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"License"). You may not use this file except in compliance with the
License. You can obtain a copy of the License at
http://gephi.org/about/legal/license-notice/
or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
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License. When distributing the software, include this License Header
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If you wish your version of this file to be governed by only the CDDL
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Contributor(s):
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*/
package org.gephi.layout.api;
import org.gephi.layout.spi.Layout;
import org.gephi.project.api.Workspace;
/**
* A LayoutController is the one responsible for controlling the states of
* the {@link LayoutModel}. It always controls the current workspace model.
* <p>
* This controller is a singleton and can therefore be found in Lookup:
* <pre>LayoutController lc = Lookup.getDefault().lookup(LayoutController.class);</pre>
* @author Mathieu Bastian
*/
public interface LayoutController {
/**
* Returns the model of the currently selected {@link Workspace}.
*/
public LayoutModel getModel();
/**
* Sets the Layout to execute.
* @param layout the layout that is to be selected
*/
public void setLayout(Layout layout);
/**
* Executes the current Layout.
*/
public void executeLayout();
/**
* Executes the current layout for <code>numIterations</code> iterations.
* @param numIterations the number of iterations of the algorithm
*/
public void executeLayout(int numIterations);
/**
* Determine if the current Layout can be executed.
* @return <code>true</code> if the layout is executable.
*/
public boolean canExecute();
/**
* Stop the Layout's execution.
*/
public void stopLayout();
/**
* Determine if the current Layout execution can be stopped.
* If the current Layout is not running, it generally cannot be stopped.
* @return <code>true</code> if the layout can be stopped.
*/
public boolean canStop();
}