SimpleControllerHandler.java

/*
  SimpleControllerHandler.java

  (c) 2017 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 net.java.games.input.Component;
import net.java.games.input.Component.POV;
import net.java.games.input.Controller;
import v9t9.common.keyboard.JoystickRole;

/**
 * Handle controllers whose values map to 
 * @author ejs
 *
 */
public class SimpleControllerHandler implements IControllerHandler {
	protected final Controller controller;
	protected final Component component;
	protected final JoystickRole role;
	
	private boolean failedLast;

	/**
	 * 
	 */
	public SimpleControllerHandler(Controller controller, Component component, JoystickRole role) {
		this.controller = controller;
		this.component = component;
		this.role = role;
		
		failedLast = false;
	}

	/* (non-Javadoc)
	 * @see v9t9.emulator.clients.builtin.swt.SwtLwjglKeyboardHandler.ControllerHandler#getController()
	 */
	@Override
	public Controller getController() {
		return controller;
	}
	
	/* (non-Javadoc)
	 * @see v9t9.gui.client.swt.IControllerHandler#getComponent()
	 */
	@Override
	public Component getComponent() {
		return component;
	}
	
	/**
	 * @return the role
	 */
	public JoystickRole getRole() {
		return role;
	}
	
	/* (non-Javadoc)
	 * @see v9t9.emulator.clients.builtin.swt.SwtLwjglKeyboardHandler.ControllerHandler#setJoystick(int, v9t9.keyboard.KeyboardState)
	 */
	@Override
	public void setJoystick(int joy, State state) {
		switch (role) {
		case IGNORE:
			return;
			
		case X_AXIS: {
			int x = (int) Math.signum(getAxis());
			state.x += x;
			break;
		}
		case Y_AXIS: {
			int y = (int) Math.signum(getAxis());
			state.y += y;
			break;
		}
	
		case BUTTON: {
			boolean fire = getButton();
			state.button |= fire;
			break;
		}
		
		case DIRECTIONAL: {
			float value = getAxis();
			int y = 0;
			int x = 0;
			if (value == POV.UP_LEFT) {
				y = -1;
				x = -1;
			} else if (value == POV.UP) {
				y = -1;
				x = 0;
			} else if (value == POV.UP_RIGHT) {
				y = -1;
				x = 1;
			} else if (value == POV.RIGHT) {
				y = 0;
				x = 1;
			} else if (value == POV.DOWN_RIGHT) {
				y = 1;
				x = 1;
			} else if (value == POV.DOWN) {
				y = 1;
				x = 0;
			} else if (value == POV.DOWN_LEFT) {
				y = -1;
				x = 1;
			} else if (value == POV.LEFT) {
				y = 0;
				x = -1;
			}
			state.x += x;
			state.y += y;
			break;
		}

		case UP: {
			if (getAxis() != 0) {
				state.y--;
			}
			break;
		}
		case DOWN: {
			if (getAxis() != 0) {
				state.y++;
			}
			break;
		}
		case LEFT: {
			if (getAxis() != 0) {
				state.x--;
			}
			break;
		}
		case RIGHT: {
			if (getAxis() != 0) {
				state.x++;
			}
			break;
		}
		}
	}
	
	protected float getAxis() {
		if (component == null)
			return 0;
		float axis = component.getPollData();
		if (component.isAnalog() && Math.abs(axis) <= 0.5)
			axis = 0;
		return axis;
	}
	protected boolean getButton() {
		if (component == null)
			return false;

		boolean fire = component.getPollData() != 0;
		return fire;
	}
	
	/* (non-Javadoc)
	 * @see v9t9.gui.client.swt.SwtLwjglKeyboardHandler.ControllerHandler#isFailedLast()
	 */
	@Override
	public boolean isFailedLast() {
		return failedLast;
	}
	/* (non-Javadoc)
	 * @see v9t9.gui.client.swt.SwtLwjglKeyboardHandler.ControllerHandler#setFailedLast(boolean)
	 */
	@Override
	public void setFailedLast(boolean failedLast) {
		this.failedLast = failedLast;
	}
}