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package de.lessvoid.nifty.slick2d.input.events;

import de.lessvoid.nifty.slick2d.input.ForwardingMode;
import de.lessvoid.nifty.slick2d.input.InputState;

import javax.annotation.Nonnull;

/**
 * This is the abstract mouse event that stores only the data all mouse events have in common.
 *
 * @author Martin Karing <[email protected]>
 */
public abstract class AbstractMouseEvent implements InputEvent {
  /**
   * The X coordinate of the location where the mouse event occurred.
   */
  private final int locX;

  /**
   * The Y coordinate of the location where the mouse event occurred.
   */
  private final int locY;

  /**
   * Create a instance of this class and define the x and the y coordinate of the location where the event happened.
   *
   * @param x the x coordinate
   * @param y the y coordinate
   */
  protected AbstractMouseEvent(final int x, final int y) {
    locX = x;
    locY = y;
  }

  /**
   * {@inheritDoc} Default implementation allows this event to be executed in any case.
   */
  @Override
  public boolean executeEvent(@Nonnull final InputState state) {
    return true;
  }

  /**
   * Get the X coordinate of the location where the mouse event happened.
   *
   * @return the x coordinate of the event location
   */
  protected final int getX() {
    return locX;
  }

  /**
   * Get the Y coordinate of the location where the mouse event happened.
   *
   * @return the y coordinate of the event location
   */
  protected final int getY() {
    return locY;
  }

  @Override
  public boolean isForwarded(@Nonnull final ForwardingMode mode) {
    return (mode == ForwardingMode.mouse) || (mode == ForwardingMode.all);
  }

  /**
   * {@inheritDoc} The default implementation never updates the state.
   */
  @Override
  public void updateState(@Nonnull final InputState state, final boolean handledByGUI) {
    // nothing to do
  }
}