Layer.java :  » Game » loon-simple » org » loon » framework » game » simple » action » sprite » j2me » Android Open Source

package org.loon.framework.game.simple.action.sprite.j2me;

import org.loon.framework.game.simple.core.graphics.device.LGraphics;

/**
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @emailceponline@yahoo.com.cn
 * @version 0.1
 */
public abstract class Layer {
  
  private int width;

  private int height;

  private int x;

  private int y;

  private boolean visible;

  Layer(int x, int y, int width, int height, boolean visible) {
    setSize(width, height);
    setPosition(x, y);
    setVisible(visible);
  }

  void setSize(int width, int height) {
    if (width < 1 || height < 1)
      throw new IllegalArgumentException();

    this.width = width;
    this.height = height;
  }

  public final int getWidth() {
    return width;
  }

  public final int getHeight() {
    return height;
  }

  public final int getX() {
    return x;
  }

  public final int getY() {
    return y;
  }

  public final boolean isVisible() {
    return visible;
  }

  public void move(int dx, int dy) {
    synchronized (this) {
      x += dx;
      y += dy;
    }
  }

  public abstract void paint(LGraphics g);

  public void setPosition(int x, int y) {
    synchronized (this) {
      this.x = x;
      this.y = y;
    }
  }

  public void setVisible(boolean visible) {
    this.visible = visible;
  }
}