FingerPaintDemoActivity

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.project.fingerpaint;




import java.util.LinkedList;
import java.util.Queue;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.EmbossMaskFilter;
import android.graphics.MaskFilter;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.Display;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.RelativeLayout;

public class FinderPaintDemo extends Activity implements ColorPickerDialog.OnColorChangedListener {
	private RelativeLayout drawingLayout;
	private MyView myView;
	private Display display;
	private Bitmap photoBitmap;
	public static int targetColor=Color.WHITE;
	public static int replaceColor = Color.GREEN;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
        photoBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.image);
        setContentView(R.layout.main);
        drawingLayout = (RelativeLayout)findViewById(R.id.drawingLayout);

        myView = new MyView(this);
        drawingLayout.addView(myView);


     // here to put image


        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
        mPaint.setColor(0xFFFF0000);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeJoin(Paint.Join.ROUND);
        mPaint.setStrokeCap(Paint.Cap.ROUND);
        mPaint.setStrokeWidth(12);

        mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },
                                       0.4f, 6, 3.5f);

        mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL);
    }

    private Paint       mPaint;
    private MaskFilter  mEmboss;
    private MaskFilter  mBlur;

    public void colorChanged(int color) {
        mPaint.setColor(color);
    }

    public class MyView extends View {

        private static final float MINP = 0.25f;
        private static final float MAXP = 0.75f;

        private Bitmap  mBitmap;
        private Canvas  mCanvas;
        private Path    mPath;
        private Paint   mBitmapPaint;

        public MyView(Context c) {
            super(c);

            mBitmap = Bitmap.createBitmap(display.getWidth(), display.getHeight(), Bitmap.Config.ARGB_8888);
            mCanvas = new Canvas(mBitmap);
            mPath = new Path();
            mBitmapPaint = new Paint(Paint.DITHER_FLAG);
        }

        public MyView(Context c, AttributeSet atrs ) {
        	super(c, atrs);
        	mBitmap = Bitmap.createBitmap(display.getWidth(), display.getHeight(), Bitmap.Config.ARGB_8888);
        	mCanvas = new Canvas(mBitmap);
        	mPath = new Path();
        	mBitmapPaint = new Paint(Paint.DITHER_FLAG);

        }


        @Override
        protected void onSizeChanged(int w, int h, int oldw, int oldh) {
            super.onSizeChanged(w, h, oldw, oldh);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            canvas.drawColor(0xFFFFFFFF);

            canvas.drawBitmap (photoBitmap, 0,  0, null); // Extra to show Bitmap

            canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
            canvas.drawPath(mPath, mPaint);
        }

        private float mX, mY;
        private static final float TOUCH_TOLERANCE = 4;

        private void touch_start(float x, float y) {
            mPath.reset();
            mPath.moveTo(x, y);
            mX = x;
            mY = y;

        }
        private void touch_move(float x, float y) {
            float dx = Math.abs(x - mX);
            float dy = Math.abs(y - mY);
            if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
                mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
                mX = x;
                mY = y;
            }
        }
        private void touch_up() {
            mPath.lineTo(mX, mY);
            // commit the path to our offscreen

            mCanvas.drawPath(mPath, mPaint);
            ////////////////////////////////////
//            Point pn = new Point();
//            FloodFill(photoBitmap,pn , 0xffffffff, 0Xff000000);
            //////////////////////////////
            // kill this so we don't double draw
            mPath.reset();
        }

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            float x = event.getX();
            float y = event.getY();
            Point pnt =new Point((int)x,(int)y);

            targetColor = photoBitmap.getPixel((int)event.getX(),(int) event.getY());

            System.out.println(targetColor);
            System.out.println(replaceColor);

            //FloodFill(photoBitmap, pnt , targetColor,replaceColor );// extra

            //invalidate();
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    //touch_start(x, y);
                	FloodFill(photoBitmap, pnt , targetColor, replaceColor );// extra
                    myView.invalidate();
                    break;
                case MotionEvent.ACTION_MOVE:
                    //touch_move(x, y);
                    //invalidate();
                    break;
                case MotionEvent.ACTION_UP:
                    //touch_up();
                   // invalidate();
                    break;
            }
            return true;
        }
    }

    private static final int COLOR_MENU_ID = Menu.FIRST;
    private static final int EMBOSS_MENU_ID = Menu.FIRST + 1;
    private static final int BLUR_MENU_ID = Menu.FIRST + 2;
    private static final int ERASE_MENU_ID = Menu.FIRST + 3;
    private static final int SRCATOP_MENU_ID = Menu.FIRST + 4;

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);

        menu.add(0, COLOR_MENU_ID, 0, "Color").setShortcut('3', 'c');
        menu.add(0, EMBOSS_MENU_ID, 0, "Emboss").setShortcut('4', 's');
        menu.add(0, BLUR_MENU_ID, 0, "Blur").setShortcut('5', 'z');
        menu.add(0, ERASE_MENU_ID, 0, "Erase").setShortcut('5', 'z');
        menu.add(0, SRCATOP_MENU_ID, 0, "SrcATop").setShortcut('5', 'z');

        /****   Is this the mechanism to extend with filter effects?
        Intent intent = new Intent(null, getIntent().getData());
        intent.addCategory(Intent.CATEGORY_ALTERNATIVE);
        menu.addIntentOptions(
                              Menu.ALTERNATIVE, 0,
                              new ComponentName(this, NotesList.class),
                              null, intent, 0, null);
        *****/
        return true;
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        super.onPrepareOptionsMenu(menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        mPaint.setXfermode(null);
        mPaint.setAlpha(0xFF);

        switch (item.getItemId()) {
            case COLOR_MENU_ID:
                new ColorPickerDialog(this, this, mPaint.getColor()).show();
                return true;
            case EMBOSS_MENU_ID:
                if (mPaint.getMaskFilter() != mEmboss) {
                    mPaint.setMaskFilter(mEmboss);
                } else {
                    mPaint.setMaskFilter(null);
                }
                return true;
            case BLUR_MENU_ID:
                if (mPaint.getMaskFilter() != mBlur) {
                    mPaint.setMaskFilter(mBlur);
                } else {
                    mPaint.setMaskFilter(null);
                }
                return true;
            case ERASE_MENU_ID:
                mPaint.setXfermode(new PorterDuffXfermode(
                                                        PorterDuff.Mode.CLEAR));
                return true;
            case SRCATOP_MENU_ID:
                mPaint.setXfermode(new PorterDuffXfermode(
                                                    PorterDuff.Mode.SRC_ATOP));
                mPaint.setAlpha(0x80);
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void FloodFill(Bitmap bmp, Point pt, int targetColor, int replacementColor){

    	System.out.println("Method Call thai");
    	Queue<Point> q = new LinkedList<Point>();
    	q.add(pt);
    	while (q.size() > 0) {
    		System.out.println("While ma aavyo.");
    	    Point n = q.poll();
    	    if (bmp.getPixel(n.x, n.y) != targetColor)
    	        continue;

    	    Point w = n, e = new Point(n.x + 1, n.y);
    	    while ((w.x > 0) && (bmp.getPixel(w.x, w.y) == targetColor)) {
    	        bmp.setPixel(w.x, w.y, replacementColor);
    	        System.out.println("Pixcel Set thase");
    	        if ((w.y > 0) && (bmp.getPixel(w.x, w.y - 1) == targetColor))
    	            q.add(new Point(w.x, w.y - 1));
    	        if ((w.y < bmp.getHeight() - 1)
    	                && (bmp.getPixel(w.x, w.y + 1) == targetColor))
    	            q.add(new Point(w.x, w.y + 1));
    	        w.x--;
    	    }
    	    while ((e.x < bmp.getWidth() - 1)
    	            && (bmp.getPixel(e.x, e.y) == targetColor)) {
    	        bmp.setPixel(e.x, e.y, replacementColor);

    	        if ((e.y > 0) && (bmp.getPixel(e.x, e.y - 1) == targetColor))
    	            q.add(new Point(e.x, e.y - 1));
    	        if ((e.y < bmp.getHeight() - 1)
    	                && (bmp.getPixel(e.x, e.y + 1) == targetColor))
    	            q.add(new Point(e.x, e.y + 1));
    	        e.x++;
    	    }
    	}
    }
}