ControlerFactory.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 27.03.2004
 */
package eniac.data.control;

import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.event.MouseEvent;

import eniac.data.view.sw.SwitchPanel;
import eniac.skin.Descriptor;

/**
 * @author zoppke
 */
public class ControlerFactory {

	private Controler[] _actionators;

	private String[] _keys;

	// ============================== lifecycle
	// =================================

	public ControlerFactory() {

		// init actionators
		_actionators = new Controler[]{new Toggle(), new PushButton(), new Switch(), new OperationSwitch()};

		// init keys
		_keys = new String[_actionators.length];
		for (int i = 0; i < _keys.length; ++i) {
			String s = _actionators[i].getClass().getName();
			_keys[i] = s.substring(s.lastIndexOf('$') + 1);
		}
	}

	// ============================= methods
	// ====================================

	public Controler get(String cls) {
		for (int i = 0; i < _actionators.length; ++i) {
			if (_keys[i].equals(cls)) {
				return _actionators[i];
			}
		}
		return null;
	}

	// =============================== Toggle
	// ===================================

	private static class Toggle extends BasicControler {
		public Toggle() {
			// empty constructor
		}

		public void mpressed(MouseEvent e) {
			toggleValue(e);
		}
	}

	// ============================ PushButton
	// ==================================

	private static class PushButton extends BasicControler {

		public PushButton() {
			// empty constructor
		}

		public void mpressed(MouseEvent e) {
			setValue(e, 1);
		}

		public void mreleased(MouseEvent e) {
			setValue(e, 0);
		}

		public void mdragged(MouseEvent e) {
			// if dragged outside the component, take it as released.
			if (!isInside(e)) {
				setValue(e, 0);
			}
		}
	}

	// =============================== Switch
	// ===================================

	private static class Switch extends BasicControler {

		public Switch() {
			// empty constructor
		}

		private int _oldValue;

		public void mpressed(MouseEvent e) {

			// save old value and set new one
			_oldValue = getValue(e);
			setValueByPoint(e);
		}

		public void mreleased(MouseEvent e) {
			setValueByPoint(e);
		}

		public void mdragged(MouseEvent e) {
			setValueByPoint(e);
		}

		private void setValueByPoint(MouseEvent e) {

			// compute clickpoint in descriptor's bounds
			SwitchPanel sp = getSwitchPanel(e);
			Descriptor d = sp.getDescriptor(sp.getLod());
			double x = ((double) e.getX()) * d.getWidth() / sp.getWidth();
			double y = ((double) e.getY()) * d.getHeight() / sp.getHeight();

			// get shapes from descriptor
			Object[] shapes = (Object[]) d.get(Descriptor.Key.AREAS);
			if (shapes == null) {
				shapes = (Object[]) d.get(Descriptor.Key.RECTANGLE_ARRAY);
			}

			// search for a shape that containes the point.
			for (int i = 0; i < shapes.length; ++i) {
				if (((Shape) shapes[i]).contains(x, y)) {
					// shape is found. set value and return.
					setValue(e, i);
					return;
				}
			}
			// cannot find value. Set old value.
			setValue(e, _oldValue);
		}
	}

	// =========================== OperationSwitch
	// ==============================

	private static class OperationSwitch extends BasicControler {

		public OperationSwitch() {
			// empty constructor
		}

		private Controler _controler = null;

		public void mpressed(MouseEvent e) {

			// compute clickpoint in descriptor's bounds
			SwitchPanel sp = getSwitchPanel(e);
			Descriptor d = sp.getDescriptor(sp.getLod());
			double x = ((double) e.getX()) * d.getWidth() / sp.getWidth();
			double y = ((double) e.getY()) * d.getHeight() / sp.getHeight();

			// get clearCorrect rectangle from descriptor
			Rectangle r = (Rectangle) d.get(Descriptor.Key.RECTANGLE);

			// select controler according to inside or outside the rectangle
			if (r.contains(x, y)) {
				((eniac.data.model.sw.SwitchAndFlag) sp.getData()).toggleFlag();
			}
			else {
				_controler = new Switch();
				_controler.mpressed(e);
			}
		}

		public void mreleased(MouseEvent e) {
			if (_controler != null) {
				_controler.mreleased(e);
				_controler = null;
			}
		}

		public void mdragged(MouseEvent e) {
			if (_controler != null) {
				_controler.mdragged(e);
			}
		}
	}
}