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Nuts'n'Bolts Utilities
There is a newer version: 6.2.0
/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 David Berkman
 *
 * This file is part of the SmallMind Code Project.
 *
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 *
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * ...or...
 *
 * 2) The terms of the Apache License, Version 2.0.
 *
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 *
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.nutsnbolts.layout;

import java.util.Iterator;
import java.util.LinkedList;

public abstract class Box> {

  private final ParaboxLayout layout;
  private final LinkedList> elements = new LinkedList>();
  private final Class managedClass;

  protected Box (Class managedClass, ParaboxLayout layout) {

    this.managedClass = managedClass;
    this.layout = layout;
  }

  protected abstract void doLayout (Bias bias, double containerPosition, double containerMeasurement, LayoutTailor tailor);

  public abstract double calculateMinimumMeasurement (Bias bias, LayoutTailor tailor);

  public abstract double calculatePreferredMeasurement (Bias bias, LayoutTailor tailor);

  public abstract double calculateMaximumMeasurement (Bias bias, LayoutTailor tailor);

  protected ParaboxLayout getLayout () {

    return layout;
  }

  protected LinkedList> getElements () {

    return elements;
  }

  public synchronized  B add (C component) {

    add(component, Constraint.immutable());

    return managedClass.cast(this);
  }

  public synchronized B add (Object component, Constraint constraint) {

    layout.getContainer().nativelyAddComponent(component);
    elements.add(layout.getContainer().constructElement(component, constraint));

    return managedClass.cast(this);
  }

  public synchronized B add (Box box) {

    add(box, Constraint.stretch());

    return managedClass.cast(this);
  }

  public synchronized B add (Box box, Constraint constraint) {

    elements.add(new BoxParaboxElement(box, constraint));

    return managedClass.cast(this);
  }

  public synchronized void removeAll () {

    Iterator> elementIter = elements.iterator();

    while (elementIter.hasNext()) {

      ParaboxElement element = elementIter.next();

      if (element.isNativeComponent()) {
        layout.getContainer().nativelyRemoveComponent(element.getPart());
      } else {
        ((Box)element.getPart()).removeAll();
      }

      elementIter.remove();
    }
  }

  public boolean remove (Object component) {

    Iterator> elementIter = elements.iterator();

    while (elementIter.hasNext()) {

      ParaboxElement element = elementIter.next();

      if (element.isNativeComponent()) {
        if (element.getPart().equals(component)) {
          layout.getContainer().nativelyRemoveComponent(component);

          elementIter.remove();

          return true;
        }
      } else {
        if (element.getPart().equals(component)) {
          ((Box)element.getPart()).removeAll();

          elementIter.remove();

          return true;
        } else if (((Box)element.getPart()).remove(component)) {

          return true;
        }
      }
    }

    return false;
  }
}