Android Open Source - Sketcher Squares Style

From Project

Back to project page Sketcher.

License

The source code is released under:

Apache License

If you think the Android project Sketcher listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

package org.sketcher.style;
//from   ww  w  .  j  a v  a 2s.c  om
import java.util.HashMap;

import org.sketcher.Style;

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

class SquaresStyle implements Style {
  private float prevX;
  private float prevY;

  private Paint paint = new Paint();
  private Paint mBackgroundPaint = new Paint();

  {
    paint.setColor(Color.BLACK);
    paint.setAlpha(100);
    paint.setStyle(Paint.Style.STROKE);
    paint.setAntiAlias(true);
  }

  {
    mBackgroundPaint.setColor(Color.WHITE);
    mBackgroundPaint.setStyle(Paint.Style.FILL);
  }

  private static final Path PATH = new Path();

  private static final float ALPHA = 1.57079633F;
  private static final float COS_ALPHA = (float) Math.cos(ALPHA);
  private static final float SIN_ALPHA = (float) Math.sin(ALPHA);

  @Override
  public void stroke(Canvas c, float x, float y) {
    float dx = x - prevX;
    float dy = y - prevY;

    float ax = COS_ALPHA * dx - SIN_ALPHA * dy;
    float ay = SIN_ALPHA * dx + COS_ALPHA * dy;

    PATH.reset();
    PATH.moveTo(prevX - ax, prevY - ay);
    PATH.lineTo(prevX + ax, prevY + ay);
    PATH.lineTo(x + ax, y + ay);
    PATH.lineTo(x - ax, y - ay);
    PATH.close();

    c.drawPath(PATH, mBackgroundPaint);
    c.drawPath(PATH, paint);

    prevX = x;
    prevY = y;
  }

  @Override
  public void strokeStart(float x, float y) {
    prevX = x;
    prevY = y;
  }

  @Override
  public void draw(Canvas c) {
  }

  @Override
  public void setColor(int color) {
    paint.setColor(color);
    paint.setAlpha(100);
  }

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

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

Java Source Code List