Android Open Source - AndroidBigImage Animation

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From Project

Back to project page AndroidBigImage.

License

The source code is released under:

GNU General Public License

Java Source Code

package fr.free.nrw.androidbigimage;
/*from   w  w  w.  j a  v  a  2 s .c o m*/
import java.util.TimerTask;

import android.os.Handler;

public class Animation extends TimerTask {
  
  private AnimationCallBack callBack;
  private Handler handle;
  private Runnable cbkAction;
  private float speedX;
  private float speedY;
  private float currentCenterX, currentCenterY;
  private float current_scale, target_scale;
  private boolean runningMove;
  private boolean runningScale;
  private boolean scaleDirectionPlus;
  
  private static final float SCALE_STEP = (float)0.04;
  private static final float MAX_SPEED = 100;
  private static final float END_SPEED_THRESHOLD = (float)4;
  private static final float SPEED_STEP = (float)1.1;
  
  public Animation(Handler handle, int current_centerX, int current_centerY, float currentScale) {
    super();
    speedX = 0;
    speedY = 0;
    runningMove = false;
    runningScale = false;
    this.currentCenterX = current_centerX;
    this.currentCenterY = current_centerY;
    this.current_scale = currentScale;
    this.handle = handle;
    cbkAction = new Runnable(){
      public void run(){
        callBack.onTimer((int)currentCenterX, (int)currentCenterY, current_scale);
      }
    };
  }

  @Override
  public void run() {
    if(runningMove == true){
      float speedAbs = speedX * speedX + speedY * speedY;
      
      if(speedAbs >= (MAX_SPEED * MAX_SPEED)){
        speedX = (speedX/speedAbs) * MAX_SPEED * MAX_SPEED;
        speedY = (speedY/speedAbs) * MAX_SPEED * MAX_SPEED;
      }
      
      if(speedAbs <= END_SPEED_THRESHOLD){
        runningMove = false;
      }
      else {
        currentCenterX += speedX;
        currentCenterY += speedY;
        handle.post(cbkAction);
        speedX /= SPEED_STEP;
        speedY /= SPEED_STEP;
      }
    }
    
    if(runningScale == true){
      if(scaleDirectionPlus == true){
        current_scale += SCALE_STEP*current_scale;
        if(current_scale >= target_scale){
          runningScale = false;
          current_scale = target_scale;
        }
        handle.post(cbkAction);
      }
      else{
        current_scale -= SCALE_STEP*current_scale;
        if(current_scale <= target_scale){
          runningScale = false;
          current_scale = target_scale;
        }
        handle.post(cbkAction);
      }
    }
  }
  
  public void setCallBack(AnimationCallBack cbk){
    callBack = cbk;
  }
  
  public void setInfo(float speedX_, float speedY_, int centerX_, int centerY_){
    speedX = speedX_;
    speedY = speedY_;
    currentCenterX = centerX_;
    currentCenterY = centerY_;
    runningMove = true;
  }
  
  public void setScaleInfo(float current_scale, float target_scale){
    this.current_scale = current_scale;
    this.target_scale = target_scale;
    
    if(current_scale < target_scale){
      scaleDirectionPlus = true;
    }
    else{
      scaleDirectionPlus = false;
    }
    
    runningScale = true;
  }
  
  public void stopProcess(){
    runningMove = false;
  }
}

Java Source Code List

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