Android Open Source - nadia Game State Manager

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Back to project page nadia.

License

The source code is released under:

GNU Lesser General Public License

Java Source Code

/*
 * GameStateManager.java//from  w ww  .j a  va  2s . c o m
 * 
 * Copyright (c) 2013, Emmanuel Arana Corzo. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301  USA
 */

package com.redarctic.nadia.baseengine;

import java.util.Stack;

import com.redarctic.nadia.ext.simplesignalslot.ISignalProvider;
import com.redarctic.nadia.ext.simplesignalslot.ISlotProvider;
import com.redarctic.nadia.ext.simplesignalslot.SignalSlotMap;
import com.redarctic.nadia.ext.simplesignalslot.SlotProviderMethodPair;

import android.graphics.Canvas;

public class GameStateManager extends GameComponent implements ISignalProvider, ISlotProvider {
  
  public static final String SIGNAL_STATE_CHANGE = "STATE_CHANGE";
  
  final int START_DRAW_ORDER = 5000;
  final int DRAW_ORDER_INC = 100;
  
  int drawOrder;
  
  private Stack<GameState> gameStates = new Stack<GameState>();
  
  public GameState getCurrentState() {
    return gameStates.peek();
  }
  
  public GameStateManager() {
    super();
    this.drawOrder = START_DRAW_ORDER;
  }
  
  @Override
  public void initialize() {
  }

  @Override
  public void update(Canvas canvas) {    
  }
  
  public void popState() {
    if (gameStates.size() > 0) {
      removeState();
      drawOrder -= DRAW_ORDER_INC;
      
      SignalSlotMap.fastEmit(this, SIGNAL_STATE_CHANGE, (GameState)null);
    }
  }
  
  private void removeState() {
    GameState state = gameStates.peek();
    SignalSlotMap.fastDisconnect(this, 
        SlotProviderMethodPair.create(state, "stateChange", GameState.class));
    // TODO: make something with the component states in the game (Remove)
    gameStates.pop();
  }
  
  private void addState(GameState newState) {
    gameStates.push(newState);
    
    // TODO: Add the components to the game itself
    SignalSlotMap.fastConnect(this, SIGNAL_STATE_CHANGE, 
        SlotProviderMethodPair.create(newState, "stateChange", GameState.class));
  }
  
  public void pushState(GameState newState) {
    drawOrder += DRAW_ORDER_INC;
    newState.setDrawOrder(drawOrder);
    
    addState(newState);
    
    SignalSlotMap.fastEmit(this, SIGNAL_STATE_CHANGE, newState);
  }
  
  public void changeState(GameState newState) {
    while (!gameStates.isEmpty())
      removeState();
    
    newState.setDrawOrder(START_DRAW_ORDER);
    drawOrder = START_DRAW_ORDER;
    
    addState(newState);
    
    SignalSlotMap.fastEmit(this, SIGNAL_STATE_CHANGE, newState);
  }

  @Override
  public void onEnabledChange(Boolean value) {
  }

  @Override
  public void onUpdateOrderChange(Integer value) {    
  }

}

Java Source Code List

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