CircleDrawable.java

/*
 * Copyright (C) 2015 AChep@xda <artemchep@gmail.com>
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */
package com.achep.base.ui.drawables;

import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;

/**
 * Created by Artem Chepurnoy on 15.02.2015.
 */
public class CircleDrawable extends Drawable {

    private final Paint mPaint;

    public CircleDrawable() {
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setStyle(Paint.Style.FILL);
    }

    public void setColor(int color) {
        mPaint.setColor(color | 0xFF000000); // ignore alpha bits
        invalidateSelf();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void draw(Canvas canvas) {
        final Rect rect = getBounds();
        canvas.drawCircle(
                rect.exactCenterX(),
                rect.exactCenterY(),
                Math.min(rect.height(), rect.width()) / 2f, mPaint);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setAlpha(int alpha) {
        mPaint.setAlpha(alpha);
        invalidateSelf();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setColorFilter(ColorFilter cf) {
        mPaint.setColorFilter(cf);
        invalidateSelf();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public int getOpacity() {
        return PixelFormat.TRANSLUCENT;
    }
}