Android Open Source - Sketcher Ribbon 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;
//  w w  w  .j a v  a 2  s.  c o  m
import java.util.HashMap;

import org.sketcher.Style;

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

class RibbonStyle implements Style {
  private Paint paint = new Paint();
  private Painter[] painters = new Painter[50];

  private float x;
  private float y;

  private class Painter {
    private static final int SCREEN_WIDTH = 480;
    private static final int SCREEN_HEIGHT = 600;

    float dx = SCREEN_WIDTH / 2;
    float dy = SCREEN_HEIGHT / 2;
    float ax = 0;
    float ay = 0;
    float div = 0.1F;
    float ease = (float) (Math.random() * 0.2 + 0.6);
  }

  {
    paint.setColor(Color.BLACK);
    paint.setAlpha(25);
    paint.setAntiAlias(true);

    for (int i = 0; i < 50; i++) {
      painters[i] = new Painter();
    }
  }

  @Override
  public void draw(Canvas c) {
    float startX = 0;
    float startY = 0;
    for (int i = 0; i < painters.length; i++) {
      startX = painters[i].dx;
      startY = painters[i].dy;
      painters[i].dx -= painters[i].ax = (painters[i].ax + (painters[i].dx - x)
          * painters[i].div)
          * painters[i].ease;
      painters[i].dy -= painters[i].ay = (painters[i].ay + (painters[i].dy - y)
          * painters[i].div)
          * painters[i].ease;
      c.drawLine(startX, startY, painters[i].dx, painters[i].dy, paint);
    }
  }

  @Override
  public void stroke(Canvas c, float x, float y) {
    this.x = x;
    this.y = y;
  }

  @Override
  public void strokeStart(float x, float y) {
    this.x = x;
    this.y = y;

    for (int i = 0, max = painters.length; i < max; i++) {
      Painter painter = painters[i];
      painter.dx = x;
      painter.dy = y;
    }
  }

  @Override
  public void setColor(int color) {
    paint.setColor(color);
    paint.setAlpha(25);
  }

  @Override
  public void saveState(HashMap<Integer, Object> state) {
  }

  @Override
  public void restoreState(HashMap<Integer, Object> state) {
  }
}

Java Source Code List