Stop.java example

Explorer
geogebra-master
/*
 * SVG Salamander
 * Copyright (c) 2004, Mark McKay
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 *   - Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the following
 *     disclaimer.
 *   - 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 HOLDER 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. 
 * 
 * Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
 * projects can be found at http://www.kitfox.com
 *
 * Created on January 26, 2004, 1:56 AM
 */
package com.kitfox.svg;

import java.awt.Color;

import com.kitfox.svg.xml.StyleAttribute;

/**
 * @author Mark McKay
 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
 */
public class Stop extends SVGElement {

	public static final String TAG_NAME = "stop";
	float offset = 0f;
	float opacity = 1f;
	Color color = Color.black;

	/**
	 * Creates a new instance of Stop
	 */
	public Stop() {
	}

	@Override
	public String getTagName() {
		return TAG_NAME;
	}

	@Override
	protected void build() throws SVGException {
		super.build();

		StyleAttribute sty = new StyleAttribute();

		if (getPres(sty.setName("offset"))) {
			offset = sty.getFloatValue();
			String units = sty.getUnits();
			if (units != null && units.equals("%")) {
				offset /= 100f;
			}
			if (offset > 1) {
				offset = 1;
			}
			if (offset < 0) {
				offset = 0;
			}
		}

		if (getStyle(sty.setName("stop-color"))) {
			color = sty.getColorValue();
		}

		if (getStyle(sty.setName("stop-opacity"))) {
			opacity = sty.getRatioValue();
		}
	}

	/**
	 * Updates all attributes in this diagram associated with a time event. Ie,
	 * all attributes with track information.
	 *
	 * @return - true if this node has changed state as a result of the time
	 *         update
	 */
	@Override
	public boolean updateTime(double curTime) throws SVGException {
		// if (trackManager.getNumTracks() == 0) return false;

		// Get current values for parameters
		StyleAttribute sty = new StyleAttribute();
		boolean shapeChange = false;

		if (getPres(sty.setName("offset"))) {
			float newVal = sty.getFloatValue();
			if (newVal != offset) {
				offset = newVal;
				shapeChange = true;
			}
		}

		if (getStyle(sty.setName("stop-color"))) {
			Color newVal = sty.getColorValue();
			if (newVal != color) {
				color = newVal;
				shapeChange = true;
			}
		}

		if (getStyle(sty.setName("stop-opacity"))) {
			float newVal = sty.getFloatValue();
			if (newVal != opacity) {
				opacity = newVal;
				shapeChange = true;
			}
		}

		return shapeChange;
	}
}