Android Open Source - Sketcher Shaded Style

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Back to project page Sketcher.

License

The source code is released under:

Apache License

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Java Source Code

package org.sketcher.style;
//from   w  w  w  . j  a  v a  2  s .co m
import java.util.ArrayList;
import java.util.HashMap;

import org.sketcher.Style;

import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PointF;

class ShadedStyle implements Style {
  private ArrayList<PointF> points = new ArrayList<PointF>();

  private Paint paint = new Paint();

  {
    paint.setColor(Color.BLACK);
    paint.setAntiAlias(true);
  }

  @Override
  public void stroke(Canvas c, float x, float y) {
    PointF current = new PointF(x, y);
    points.add(current);

    float dx = 0;
    float dy = 0;
    int length = 0;

    for (int i = 0, max = points.size(); i < max; i++) {
      PointF point = points.get(i);

      dx = point.x - current.x;
      dy = point.y - current.y;

      length = (int) (dx * dx + dy * dy);

      if (length < 1000) {
        paint.setAlpha(((1 - (length / 1000)) * 30));
        c.drawLine(current.x, current.y, point.x, point.y, paint);
      }
    }
  }

  @Override
  public void strokeStart(float x, float y) {
  }

  @Override
  public void draw(Canvas c) {
  }

  @Override
  public void setColor(int color) {
    paint.setColor(color);
  }

  @Override
  public void saveState(HashMap<Integer, Object> state) {
    ArrayList<PointF> points = new ArrayList<PointF>();
    points.addAll(this.points);
    state.put(StylesFactory.SHADED, points);
  }

  @SuppressWarnings("unchecked")
  @Override
  public void restoreState(HashMap<Integer, Object> state) {
    this.points.clear();
    ArrayList<PointF> points = (ArrayList<PointF>) state
        .get(StylesFactory.SHADED);
    this.points.addAll(points);
  }
}

Java Source Code List