Distorted Android

///////////////////////////////////////////////////////////////////////////////////////////////////

// Copyright 2016 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Distorted.                                                               //

//                                                                                               //

// Distorted is free software: you can redistribute it and/or modify                             //

// it under the terms of the GNU General Public License as published by                          //

// the Free Software Foundation, either version 2 of the License, or                             //

// (at your option) any later version.                                                           //

//                                                                                               //

// Distorted 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 General Public License for more details.                                                  //

//                                                                                               //

// You should have received a copy of the GNU General Public License                             //

// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //

///////////////////////////////////////////////////////////////////////////////////////////////////

package org.distorted.examples.aroundtheworld;

import android.content.Context;

import android.graphics.Canvas;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

///////////////////////////////////////////////////////////////////////////////////////////////////

class AroundTheWorldSurfaceViewPicker extends SurfaceView implements SurfaceHolder.Callback

{

    private static final int FRAME_INTERVAL = 70;

    private boolean refreshScreen = true;

    private boolean mFinishedBooting=false;

    private int scrWidth, scrHeight;

    private GraphicsThread mThread;

    private int mX, mY;

///////////////////////////////////////////////////////////////////////////////////////////////////

    private class GraphicsThread extends Thread

      {

      private SurfaceHolder mSurfaceHolder;

      private AroundTheWorldSurfaceViewPicker mPicker;

      private boolean mRun = false;

      /////////////////////////////////////////////////////////////////////////////////////

      GraphicsThread(SurfaceHolder surfaceHolder, AroundTheWorldSurfaceViewPicker p)

        {

        mSurfaceHolder = surfaceHolder;

        mPicker = p;

        }

      /////////////////////////////////////////////////////////////////////////////////////

      void setRunning(boolean run)

        {

        mRun = run;

        }

      /////////////////////////////////////////////////////////////////////////////////////

      public void run()

        {

        Canvas c;

        long time;

        while (mRun)

          {

          c = null;

          time = 0;

          if( refreshScreen && mFinishedBooting )

            {

            refreshScreen=false;

            time = System.currentTimeMillis();

            try

              {

              c = mSurfaceHolder.lockCanvas(null);

              synchronized (mSurfaceHolder) { mPicker.draw(c); }

              }

            finally

              {

              if (c != null)  mSurfaceHolder.unlockCanvasAndPost(c);

              }

            time = System.currentTimeMillis() -time;

            }

          if( time<FRAME_INTERVAL )

            {

            try { Thread.sleep(FRAME_INTERVAL-time); }

            catch(InterruptedException ex) {}

            }

          }

        }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public AroundTheWorldSurfaceViewPicker(Context c, AttributeSet attrs)

      {

      super(c, attrs);

      mX = -100;

      mY = -100;

      getHolder().addCallback(this);

      setFocusable(true);

      setFocusableInTouchMode(true);

      mFinishedBooting=true;

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void surfaceCreated(SurfaceHolder holder)

      {

      android.util.Log.e( "Picker", "surfaceCreated");

      mThread = new GraphicsThread(getHolder(), this);

      mThread.setRunning(true);

      mThread.start();

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h)

      {

      android.util.Log.e( "Picker", "surfaceChanged: width="+w+" height="+h);

      scrWidth = w;

      scrHeight= h;

      refreshScreen = true;

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void surfaceDestroyed(SurfaceHolder holder)

      {

      android.util.Log.e( "Picker", "surfaceDestroyed");

      stopThread();

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    private void stopThread()

      {

      if( mThread!=null )

        {

        boolean retry = true;

        mThread.setRunning(false);

        while (retry)

          {

          try

            {

            mThread.join();

            retry = false;

            }

          catch (InterruptedException e) { android.util.Log.e( "Picker", "Joining thread interrupted!"); }

          }

        mThread=null;

        }

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void draw(Canvas c)

      {

      if( c!=null )

        {

        }

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void setRepaint()

      {

      refreshScreen=true;

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public boolean onTouchEvent(MotionEvent event)

      {

      mX = (int)event.getX();

      mY = (int)event.getY();

      android.util.Log.e( "Picker", "onTouchEvent: x="+mX+" y="+mY);

      setRepaint();

      return true;

      }

}