Android Open Source - unknown-pleasures Dim Support

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Creative Commons Attribution NonCommercial NoDerivs (CC-NC-ND) THE WORK (AS DEFINED BELOW) IS PROVIDED UNDER THE TERMS OF THIS CREATIVE COMMONS PUBLIC LICENSE ("CCPL" OR "LICENSE"). THE WORK IS PROTE...

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Java Source Code

/**
 * DimSupport.java//from   w w  w.j  a v a2s.c om
 * Author: marek.brodziak@gmail.com
 * Created: May 22, 2014
 * Copyright 2014 by miniti
 */

package pl.miniti.android.pleasures.palette;

import android.graphics.Color;

/**
 * Class offering dimming support for all subclassing palettes
 */
public abstract class DimSupport implements Palette {

  /**
   * Number of last/first lines which will be dimmed by this palette
   */
  private static final int THRESHOLD = 10;

  /**
   * If true the dimming is enabled
   */
  protected boolean dimmed = true;

  /*
   * (non-Javadoc)
   * 
   * @see pl.miniti.android.pleasures.palette.Palette#of(int, int)
   */
  @Override
  public int of(int line, int of) {
    int rgb = rgb(line, of);
    if (dimmed) {
      if (line < 10) {
        int alpha = 255 * line / THRESHOLD;
        return Color.argb(alpha, Color.red(rgb), Color.green(rgb),
            Color.blue(rgb));
      } else if (line > of - THRESHOLD) {
        int alpha = 255 * (of - line) / THRESHOLD;
        return Color.argb(alpha, Color.red(rgb), Color.green(rgb),
            Color.blue(rgb));
      }
    }
    return rgb;
  }

  /*
   * (non-Javadoc)
   * 
   * @see pl.miniti.android.pleasures.palette.Palette#setDimmed(boolean)
   */
  @Override
  public void setDimmed(boolean dim) {
    this.dimmed = dim;
  }

  /**
   * Line color to be provided by the subclasses
   * 
   * @param line
   *            line number
   * @param of
   *            number of lines
   * @return line color
   */
  protected abstract int rgb(int line, int of);

}

Java Source Code List