source: other-projects/tipple-android/tipple-ar/tipple-standalone-hpg/src/org/greenstone/android/tipple/base/MapViewTipple.java@ 26528

package org.greenstone.android.tipple.base;

import org.greenstone.android.tipple.R;
import org.mapsforge.android.maps.MapView;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Point;
import android.view.Display;
import android.view.WindowManager;

public class MapViewTipple extends MapView
{
     protected float currentRotation = 0;
     Context context;
     SensorFusion sensor_;
     
     public MapViewTipple(Context context, SensorFusion sensorFusion) {
          super(context);
          this.context = context;
          sensor_ = sensorFusion;
     }
 
     @Override
     public void onDraw(Canvas canvas) {
          WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
          Display display = wm.getDefaultDisplay();
          int width = display.getWidth();
          int height = display.getHeight();
          Bitmap rotatedArrow;
          
          currentRotation = sensor_.getBearingDegrees();
          
          canvas.save();
          super.onDraw(canvas);
          
          Bitmap headingArrow = BitmapFactory.decodeResource(getResources(), R.drawable.arrows);
          Matrix matrix = new Matrix();
          matrix.postRotate(currentRotation, headingArrow.getWidth()-20, headingArrow.getHeight()-5);
          rotatedArrow = Bitmap.createBitmap(headingArrow , 0, 0, headingArrow.getWidth(), headingArrow.getHeight(), matrix, true);
          matrix.setTranslate(20, 20);
          rotatedArrow = Bitmap.createBitmap(rotatedArrow , 0, 0, rotatedArrow.getWidth(), rotatedArrow.getHeight(), matrix, true);
          canvas.drawBitmap(rotatedArrow, matrix, new Paint());

          //canvas.rotate(currentRotation);
          
          canvas.restore();
     }
}