Android Open Source - mobius Moving Layer

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Back to project page mobius.

License

The source code is released under:

MIT License

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Java Source Code

package com.sgtcodfish.mobiusListing.components;
/*  ww  w .  j a  va2 s . com*/
import com.badlogic.gdx.maps.MapProperties;

/**
 * <p>
 * Holds a movable layer. Override and implement interact for specific
 * directions.
 * </p>
 * 
 * @author Ashley Davis (SgtCoDFish)
 */
public abstract class MovingLayer extends InteractableLayer<Position> {
  public int  deltaPos    = 0;
  public int  maxDiff      = 0;

  // the actual direction the layer will move when going from deltaPos 0 ->
  // maxDiff
  // 1 = right/up
  // -1 = left/down
  public int  direction    = 1;

  // the direction we're currently moving in
  public int  tempDirection  = 1;

  @Override
  public void interact(Position p, int degree) {
    deltaPos += tempDirection * degree;

    move(p, degree * tempDirection);

    if (deltaPos >= maxDiff) {
      deltaPos = maxDiff;
      tempDirection = -1;
    } else if (deltaPos <= 0) {
      deltaPos = 0;
      tempDirection = 1;
    }
  }

  protected abstract void move(Position p, int degree);

  protected void tiledPropertiesHelper(MapProperties properties, String propertyString, boolean flipMax) {
    String prop = (String) properties.get(propertyString, null, String.class);

    if (prop != null) {
      int max = 0;

      try {
        max = Integer.parseInt(prop);
      } catch (NumberFormatException nfe) {
        throw new IllegalArgumentException("Parsing error when loading MovingLayer (" + propertyString
            + "); no max found.");
      }

      direction = (flipMax ? -1 : 1) * Integer.signum(max);

      if (direction == 0) {
        throw new IllegalArgumentException("MovingLayer (" + propertyString
            + "): No valid value for property found.");
      }

      maxDiff = Math.abs(max);
    } else {
      throw new IllegalArgumentException("Attempting to load MovingLayer (" + propertyString
          + ") from a layer with no valid property.");
    }
  }

  @Override
  public void reset() {
    super.reset();
    deltaPos = 0;
    maxDiff = 0;
    direction = 1;
    tempDirection = 1;
  }
}

Java Source Code List