winnerpiecemoveanim.java

手机播放交谈实时监控软件

// Copyright (c) 2005 Sony Ericsson Mobile Communications AB
//
// This software is provided "AS IS," without a warranty of any kind. 
// ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, 
// INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A 
// PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. 
//
// THIS SOFTWARE IS COMPLEMENTARY OF JAYWAY AB (www.jayway.se)

package bluegammon.gui.animation;

import javax.microedition.lcdui.Graphics;

import bluegammon.gui.BoardCanvas;
import bluegammon.logic.BoardMediator;

/**
 * Animation that flies away with a piece. Used from <code>WinnerAnim</code>
 * when there is a winner of the game.
 * 
 * @see bluegammon.gui.animation.WinnerAnim
 * @author Peter Andersson
 */
public class WinnerPieceMoveAnim extends Animation
{
  /** Winner animation */
  protected WinnerAnim m_winAnim;
  /** Number of frames in this animation */
  protected int m_frames;
  /** True for white piece, false for black */
  protected boolean m_white;
  /** Piece source x coordinate */
  protected int m_x0;
  /** Piece source y coordinate */
  protected int m_y0;
  /** Piece destination x coordinate */
  protected int m_x1;
  /** Piece destination y coordinate */
  protected int m_y1;
  /** Current frame */
  protected int m_frame = 0;
  /** Current piece coordinates */
  protected float m_x, m_y;
  /** Piece source position */
  protected int m_source;

  /**
   * Creates a piece movement animation for the winning animation.
   * 
   * @param winAnim  The <code>WinnerAnim</code>.
   * @param white    True for white piece, false for black.
   * @param source   Source index of piece to animate.
   * @param destX    Destination x-coordinate of piece animation.
   * @param destY    Destination y-coordinate of piece animation.
   * @param piecesOnSource  Number of pieces on source row.
   */
  public WinnerPieceMoveAnim(WinnerAnim winAnim, boolean white, int source,
      int destX, int destY, int piecesOnSource)
  {
    BoardCanvas canvas = BoardCanvas.getInstance();
    m_winAnim = winAnim;
    m_white = white;
    m_source = source;

    // Get source and destination coordinates
    m_x0 = canvas.getPieceX(source, piecesOnSource, white);
    m_y0 = canvas.getPieceY(source, piecesOnSource, white);
    m_x1 = destX;
    m_y1 = destY;
    m_x = m_x0;
    m_y = m_y0;
    m_frames = 30;
  }

  /**
   * Called when animation starts, removes start piece from canvas - piece now
   * on move.
   */
  public void onStart()
  {
    BoardCanvas.getInstance().removePiece(m_white, m_source);
  }

  public void paint(Graphics g)
  {
    float frameRatio = (float)m_frame / (float)m_frames;
    float dz = -BoardCanvas.PIECE_Z * frameRatio;
    float angle = 270f * frameRatio;
    // Draw piece
    BoardCanvas.getInstance().drawPiece(
        (int)m_x, (int)m_y, angle, true, dz, m_white, g);
  }

  public void next()
  {
    // Calculate new piece position
    BoardCanvas canvas = BoardCanvas.getInstance();

    // Linear move
    m_x = ((float)(m_x1 - m_x0) * m_frame) / (float)(m_frames) + m_x0;
    m_y = ((float)(m_y1 - m_y0) * m_frame) / (float)(m_frames) + m_y0;

    // Repaint
    canvas.requestRepaint();
    m_frame++;
  }

  public boolean isFinished()
  {
    return !BoardMediator.isGameFinished() || m_frame > m_frames;
  }

  /**
   * Called when animation exits, adds this disappering piece to the main winner
   * animation.
   */
  public void onExit()
  {
    m_winAnim.piecePlus();
  }

  public long getInterval()
  {
    return 20;
  }
}