Android Open Source - filemanager Canvas Transformer Builder

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License

The source code is released under:

MIT License

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Java Source Code

package com.jeremyfeinstein.slidingmenu.lib;
/*from  www. j a  v a  2  s .c om*/
import android.graphics.Canvas;
import android.view.animation.Interpolator;

import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu.CanvasTransformer;

public class CanvasTransformerBuilder {

  private CanvasTransformer mTrans;

  private static Interpolator lin = new Interpolator() {
    public float getInterpolation(float t) {
      return t;
    }
  };

  private void initTransformer() {
    if (mTrans == null)
      mTrans = new CanvasTransformer() {
      public void transformCanvas(Canvas canvas, float percentOpen) {  }
    };
  }

  public CanvasTransformer zoom(final int openedX, final int closedX, 
      final int openedY, final int closedY, 
      final int px, final int py) {
    return zoom(openedX, closedX, openedY, closedY, px, py, lin);
  }

  public CanvasTransformer zoom(final int openedX, final int closedX, 
      final int openedY, final int closedY,
      final int px, final int py, final Interpolator interp) {
    initTransformer();
    mTrans = new CanvasTransformer() {
      public void transformCanvas(Canvas canvas, float percentOpen) {
        mTrans.transformCanvas(canvas, percentOpen);
        float f = interp.getInterpolation(percentOpen);
        canvas.scale((openedX - closedX) * f + closedX,
            (openedY - closedY) * f + closedY, px, py);
      }      
    };
    return mTrans;
  }

  public CanvasTransformer rotate(final int openedDeg, final int closedDeg, 
      final int px, final int py) {
    return rotate(openedDeg, closedDeg, px, py, lin);
  }

  public CanvasTransformer rotate(final int openedDeg, final int closedDeg, 
      final int px, final int py, final Interpolator interp) {
    initTransformer();
    mTrans = new CanvasTransformer() {
      public void transformCanvas(Canvas canvas, float percentOpen) {
        mTrans.transformCanvas(canvas, percentOpen);
        float f = interp.getInterpolation(percentOpen);
        canvas.rotate((openedDeg - closedDeg) * f + closedDeg, 
            px, py);
      }      
    };
    return mTrans;
  }

  public CanvasTransformer translate(final int openedX, final int closedX, 
      final int openedY, final int closedY) {
    return translate(openedX, closedX, openedY, closedY, lin);
  }

  public CanvasTransformer translate(final int openedX, final int closedX, 
      final int openedY, final int closedY, final Interpolator interp) {
    initTransformer();
    mTrans = new CanvasTransformer() {
      public void transformCanvas(Canvas canvas, float percentOpen) {
        mTrans.transformCanvas(canvas, percentOpen);
        float f = interp.getInterpolation(percentOpen);
        canvas.translate((openedX - closedX) * f + closedX,
            (openedY - closedY) * f + closedY);
      }      
    };
    return mTrans;
  }

  public CanvasTransformer concatTransformer(final CanvasTransformer t) {
    initTransformer();
    mTrans = new CanvasTransformer() {
      public void transformCanvas(Canvas canvas, float percentOpen) {
        mTrans.transformCanvas(canvas, percentOpen);
        t.transformCanvas(canvas, percentOpen);
      }      
    };
    return mTrans;
  }

}

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