Android Open Source - crop Marquee Box

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From Project

Back to project page crop.

License

The source code is released under:

Apache License

Java Source Code

package net.flask.crop.ui;
/*from w  ww .j  a  va 2  s.  c  o m*/
import android.graphics.Canvas;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PathEffect;
import android.graphics.Rect;

public class MarqueeBox {
  private static final Paint defaultPaintA, defaultPaintB;

  static {
    defaultPaintA = new Paint();
    defaultPaintA.setColor(0xffffffff);
    defaultPaintA.setStrokeWidth(1.0f);
    defaultPaintA.setStyle(Paint.Style.STROKE);

    defaultPaintB = new Paint();
    defaultPaintB.setColor(0xff000000);
    defaultPaintB.setStrokeWidth(1.0f);
    defaultPaintB.setStyle(Paint.Style.STROKE);
  }

  private PathEffect[] pathEffects = new PathEffect[]{
      new DashPathEffect(new float[]{4.0f, 4.0f}, 0),
      new DashPathEffect(new float[]{4.0f, 4.0f}, 1f),
      new DashPathEffect(new float[]{4.0f, 4.0f}, 2f),
      new DashPathEffect(new float[]{4.0f, 4.0f}, 3f),
      new DashPathEffect(new float[]{4.0f, 4.0f}, 4f),
      new DashPathEffect(new float[]{4.0f, 4.0f}, 5f),
      new DashPathEffect(new float[]{4.0f, 4.0f}, 6f),
      new DashPathEffect(new float[]{4.0f, 4.0f}, 7f),
  };

  private float phase = 0;
  private Rect rect;
  private Path path;
  private Paint selectionMarqueePaint, selectionBackPaint;
  private float speed = 0.1f;

  public MarqueeBox(Rect rect) {
    this.rect = rect;
    this.path = new Path();
    selectionMarqueePaint = defaultPaintA;
    selectionBackPaint = defaultPaintB;
  }

  public void draw(Canvas canvas) {
    increasePhase();
    calcPathEffect();
    rect2Path(rect);

    canvas.drawPath(path, selectionBackPaint);
    canvas.drawPath(path, selectionMarqueePaint);
  }

  private void calcPathEffect() {
    selectionMarqueePaint.setPathEffect(pathEffects[((int) phase) % pathEffects.length]);
  }

  private void increasePhase() {
    if (phase >= pathEffects.length) phase = 0;
    phase += speed;
  }

  public void setRect(Rect rect) {
    this.rect = rect;
  }

  public void setSpeed(float speed) {
    this.speed = speed;
  }

  private void rect2Path(Rect rect) {
    path.reset();
    path.moveTo(rect.left, rect.top);
    path.lineTo(rect.right, rect.top);
    path.lineTo(rect.right, rect.bottom);
    path.lineTo(rect.left, rect.bottom);
    path.lineTo(rect.left, rect.top);
    path.close();
  }

}

Java Source Code List

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