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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.

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/*
 * #%L
 * SciJava Common shared library for SciJava software.
 * %%
 * Copyright (C) 2009 - 2015 Board of Regents of the University of
 * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
 * Institute of Molecular Cell Biology and Genetics.
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

package org.scijava.tool;

import org.scijava.display.event.input.KyPressedEvent;
import org.scijava.display.event.input.KyReleasedEvent;
import org.scijava.display.event.input.MsClickedEvent;
import org.scijava.display.event.input.MsDraggedEvent;
import org.scijava.display.event.input.MsMovedEvent;
import org.scijava.display.event.input.MsPressedEvent;
import org.scijava.display.event.input.MsReleasedEvent;
import org.scijava.display.event.input.MsWheelEvent;
import org.scijava.input.MouseCursor;
import org.scijava.plugin.AbstractRichPlugin;

/**
 * Abstract base class for {@link Tool} implementations.
 * 
 * @author Curtis Rueden
 * @author Grant Harris
 */
public abstract class AbstractTool extends AbstractRichPlugin implements Tool {

	@Override
	public boolean isAlwaysActive() {
		return false;
	}

	@Override
	public boolean isActiveInAppFrame() {
		return false;
	}

	@Override
	public MouseCursor getCursor() {
		return MouseCursor.DEFAULT;
	}

	@Override
	public void activate() {
		// do nothing by default
	}

	@Override
	public void deactivate() {
		// do nothing by default
	}

	@Override
	public void onKeyDown(final KyPressedEvent evt) {
		// do nothing by default
	}

	@Override
	public void onKeyUp(final KyReleasedEvent evt) {
		// do nothing by default
	}

	@Override
	public void onMouseDown(final MsPressedEvent evt) {
		// do nothing by default
	}

	@Override
	public void onMouseUp(final MsReleasedEvent evt) {
		// do nothing by default
	}

	@Override
	public void onMouseClick(final MsClickedEvent evt) {
		// do nothing by default
	}

	@Override
	public void onMouseMove(final MsMovedEvent evt) {
		// do nothing by default
	}

	@Override
	public void onMouseDrag(final MsDraggedEvent evt) {
		// do nothing by default
	}

	@Override
	public void onMouseWheel(final MsWheelEvent evt) {
		// do nothing by default
	}

	@Override
	public void configure() {
		// do nothing by default
	}

	@Override
	public String getDescription() {
		return getInfo().getDescription();
	}

}