MouseJoystickHandler.java

/*
  MouseJoystickHandler.java

  (c) 2010-2013 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.gui.client.swt;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseMoveListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Control;

import v9t9.common.keyboard.IKeyboardState;

/**
 * @author ejs
 * @deprecated
 *
 */
public class MouseJoystickHandler {

	private final ISwtVideoRenderer renderer;
	private boolean enabled;
	private MouseAdapter mouseButtonListener;
	private MouseMoveListener mouseMoveListener;
	private final IKeyboardState keyboardState;
	
	/**
	 */
	public MouseJoystickHandler(final ISwtVideoRenderer renderer, 
			IKeyboardState keyboardState) {
		this.renderer = renderer;
		this.keyboardState = keyboardState;
		
		mouseButtonListener = new MouseAdapter() {
			@Override
			public void mouseDown(MouseEvent e) {
				if (!enabled)
					return;
				if (e.button != 1)
					return;

				System.out.println("DOWN");
				int joy = (e.stateMask & SWT.SHIFT) != 0 ? 2 : 1;
				button(e.button, joy, true);
			}
			@Override
			public void mouseUp(MouseEvent e) {
				if (!enabled)
					return;
				if (e.button != 1)
					return;
				
				System.out.println("UP");
				int joy = (e.stateMask & SWT.SHIFT) != 0 ? 2 : 1;
				button(e.button, joy, false);
			}
		};
		
		mouseMoveListener = new MouseMoveListener() {
			
			public void mouseMove(MouseEvent e) {
				if (!enabled || !(e.widget instanceof Control))
					return;
				int joy = (e.stateMask & SWT.SHIFT) != 0 ? 2 : 1;
				Point loc = new Point(e.x, e.y);
				move(joy, loc.x, loc.y);
				
				boolean pressed = false;
				int buttons = e.stateMask & SWT.BUTTON_MASK;
				if ((buttons & SWT.BUTTON1) != 0)
					pressed = true;
				button(1, joy, pressed);
			}
		};
		
		renderer.addMouseEventListener(mouseButtonListener);
		renderer.addMouseMotionListener(mouseMoveListener);

	}

	/**
	 * 
	 */
	public void setEnabled(boolean en) {
		enabled = en;
		keyboardState.resetJoystick();
	}

	public boolean isEnabled() {
		return enabled;
	}

	protected void move(int joy, int x, int y) {
		int dx = 0, dy = 0;
		
		Point size = renderer.getControl().getSize();
		Point center = new Point(size.x / 2, size.y / 2);
		
		Point diff = new Point(x - center.x, y - center.y);
		
		int dist = (diff.x * diff.x) + (diff.y * diff.y);
		//System.out.println(dist + " / " + size.x + " + " + size.y);
		if (dist / 8 >= size.x + size.y) {
			double delta = 2 * Math.PI / 8;
			double ang = Math.atan2(-diff.y, diff.x);
			int quad = (int) ((ang + delta/2 ) / delta + 8) % 8;
			
			//System.out.println(diff + " -> " + ang+"  =  " +quad);
			
			switch (quad) {
			case 0:
				dx = 1; dy = 0; break;
			case 1:
				dx = 1; dy = -1; break;
			case 2:
				dx = 0; dy = -1; break;
			case 3:
				dx = -1; dy = -1; break;
			case 4:
				dx = -1; dy = 0; break;
			case 5:
				dx = -1; dy = 1; break;
			case 6:
				dx = 0; dy = 1; break;
			case 7:
				dx = 1; dy = 1; break;
			}
		}
		
		keyboardState.setJoystick(joy, IKeyboardState.JOY_X | IKeyboardState.JOY_Y, dx, dy, false);
	}

	/**
	 * @param button  
	 */
	protected void button(int button, int joy, boolean pressed) {
		//System.out.println(button +"/"+ joy + "/" + pressed);
		keyboardState.setJoystick(joy, IKeyboardState.JOY_B, 0, 0, pressed);
	}


}