Android Open Source - polygons Figure

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License

The source code is released under:

GNU General Public License

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Java Source Code

package com.github.polygons.figures;
/*from  ww w.j a v  a  2 s .  c  om*/
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;

import com.nobcatz.android.polygons.R;

/**
 * Created by Marta on 13/11/2013.
 */
public abstract class Figure extends View{

    protected Paint paint = new Paint();
    protected int id;

    public Figure(Context context) {
        super(context);
        setDrawingCacheEnabled(true);
    }

    public Figure(Context context, AttributeSet attrs) {
        super(context, attrs);
        setDrawingCacheEnabled(true);
    }

    public Figure(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setDrawingCacheEnabled(true);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        int myColor = getResources().getColor(R.color.base03);
        paint.setColor(myColor);

        drawFigure(canvas);
    }

    public abstract void drawFigure(Canvas canvas);



    @Override
    public boolean onTouchEvent(MotionEvent event) {
        int x = (int) event.getX();
        int y = (int) event.getY();

        // ignores touches on transparent background
        return isPixelTransparent(x, y) || super.onTouchEvent(event);
    }

    /**
     * @return true if pixel from (x,y) is transparent
     */
    private boolean isPixelTransparent(int x, int y) {
        Bitmap bmp = Bitmap.createBitmap(getDrawingCache());
        int color = Color.TRANSPARENT;
        try {
            color = bmp.getPixel(x, y);
        } catch (IllegalArgumentException e) {
            // x or y exceed the bitmap's bounds.
            // Reverts the View's internal state from a previously set "pressed" state.
            setPressed(false);
        }

        // Ignores touches on transparent background.
        if (color == Color.TRANSPARENT)
            return true;
        else
            return false;
    }

    public void toast(Context context){
        CharSequence text = "I am a: " + id;
        int duration = Toast.LENGTH_SHORT;

        Toast toast = Toast.makeText(context, text, duration);
        toast.show();
    }

    public static Figure createFigure(int id, Context context){
        switch (id){
            case 0: return new Oval(context);
            case 1: return new Square(context);
            case 2: return new Triangle(context);
        }
        return null;

    }

    public int getId(){
        return this.id;
    }
}

Java Source Code List