ZoomFitWidth.java

/*******************************************************************************
 * Copyright (c) 2003-2005, 2013 Till Zoppke.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Till Zoppke - initial API and implementation
 ******************************************************************************/
/*
 * Created on 21.04.2004
 */
package eniac.menu.action;

import java.awt.event.ActionEvent;

import javax.swing.JScrollPane;

import eniac.data.type.EType;
import eniac.data.view.parent.ConfigPanel;
import eniac.skin.Descriptor;
import eniac.skin.Skin;
import eniac.util.Status;
import eniac.window.EFrame;

/**
 * @author zoppke
 */
public class ZoomFitWidth extends EAction {

	/**
	 * @param e
	 * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
	 */
	public void actionPerformed(ActionEvent e) {

		// get variables
		ConfigPanel cp = EFrame.getInstance().getConfigPanel();
		JScrollPane scrollPane = (JScrollPane) cp.getParent().getParent();
		int newWidth = scrollPane.getWidth();
		EType configType = cp.getData().getType();
		Skin skin = (Skin) Status.SKIN.getValue();
		int lod = cp.getLod();
		Descriptor d = configType.getDescriptor(lod);

		// compute new height according to current lod
		int newHeight = newWidth * d.getHeight() / d.getWidth();

		// compute lod according to new hight
		lod = skin.getLodByHeight(newHeight);

		// compute new height according to new lod
		d = configType.getDescriptor(lod);
		newHeight = newWidth * d.getHeight() / d.getWidth();

		// if new height affords vertical scrollbars,
		// we need to adjust the widht.
		if (newHeight > scrollPane.getHeight()) {
			newWidth -= scrollPane.getVerticalScrollBar().getWidth();
		}
		newWidth -= 4;
		newHeight = newWidth * d.getHeight() / d.getWidth();

		// set new height.
		Status.ZOOMED_HEIGHT.setValue(newHeight);
	}

}