Finalized version 0.4.0-alpha.1

17 files changed, 39 insertions, 2927 deletions

diff --git a/README.org b/README.org
index 2b4ffa0..f891bdc 100644
--- a/README.org
+++ b/README.org
@@ -1,4 +1,4 @@
-* 7Units v0.3.2
+* 7Units v0.4.0a1
   (this project uses Semantic Versioning)
 ** What is it?
    This is a unit converter, which allows you to convert between different units, and includes a GUI which can read unit data from a file (using some unit math) and convert between units that you type in, and has a unit and prefix viewer to check the units that have been loaded in.
diff --git a/build.gradle b/build.gradle
index 4484e9d..8b90060 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ java {
 	sourceCompatibility = JavaVersion.VERSION_11
 }
 
-mainClassName = "sevenUnits.converterGUI.SevenUnitsGUI"
+mainClassName = "sevenUnitsGUI.Main"
 
 repositories {
     mavenCentral()
diff --git a/src/main/java/sevenUnits/ProgramInfo.java b/src/main/java/sevenUnits/ProgramInfo.java
index 6407d7c..f32d2c7 100644
--- a/src/main/java/sevenUnits/ProgramInfo.java
+++ b/src/main/java/sevenUnits/ProgramInfo.java
@@ -28,7 +28,7 @@ public final class ProgramInfo {
 	
 	/** The version number (0.4.0-alpha+dev) */
 	public static final SemanticVersionNumber VERSION = SemanticVersionNumber
-			.builder(0, 4, 0).preRelease("alpha").buildMetadata("dev").build();
+			.preRelease(0, 4, 0, "alpha", 1);
 	
 	private ProgramInfo() {
 		// this class is only for static variables, you shouldn't be able to
diff --git a/src/main/java/sevenUnits/converterGUI/DefaultPrefixRepetitionRule.java b/src/main/java/sevenUnits/converterGUI/DefaultPrefixRepetitionRule.java
deleted file mode 100644
index 6b6abf0..0000000
--- a/src/main/java/sevenUnits/converterGUI/DefaultPrefixRepetitionRule.java
+++ /dev/null
@@ -1,95 +0,0 @@
-/**
- * @since 2020-08-26
- */
-package sevenUnits.converterGUI;
-
-import java.util.List;
-import java.util.function.Predicate;
-
-import sevenUnits.unit.Metric;
-import sevenUnits.unit.UnitPrefix;
-
-/**
- * A rule that specifies whether prefix repetition is allowed
- *
- * @since 2020-08-26
- */
-enum DefaultPrefixRepetitionRule implements Predicate<List<UnitPrefix>> {
-	NO_REPETITION {
-		@Override
-		public boolean test(List<UnitPrefix> prefixes) {
-			return prefixes.size() <= 1;
-		}
-	},
-	NO_RESTRICTION {
-		@Override
-		public boolean test(List<UnitPrefix> prefixes) {
-			return true;
-		}
-	},
-	/**
-	 * You are allowed to have any number of Yotta/Yocto followed by possibly one
-	 * Kilo-Zetta/Milli-Zepto followed by possibly one Deca/Hecto. Same for
-	 * reducing prefixes, don't mix magnifying and reducing. Non-metric
-	 * (including binary) prefixes can't be repeated.
-	 */
-	COMPLEX_REPETITION {
-		@Override
-		public boolean test(List<UnitPrefix> prefixes) {
-			// determine whether we are magnifying or reducing
-			final boolean magnifying;
-			if (prefixes.isEmpty())
-				return true;
-			else if (prefixes.get(0).getMultiplier() > 1) {
-				magnifying = true;
-			} else {
-				magnifying = false;
-			}
-			
-			// if the first prefix is non-metric (including binary prefixes),
-			// assume we are using non-metric prefixes
-			// non-metric prefixes are allowed, but can't be repeated.
-			if (!Metric.DECIMAL_PREFIXES.contains(prefixes.get(0)))
-				return NO_REPETITION.test(prefixes);
-			
-			int part = 0; // 0=yotta/yoctos, 1=kilo-zetta/milli-zepto,
-								// 2=deka,hecto,deci,centi
-			
-			for (final UnitPrefix prefix : prefixes) {
-				// check that the current prefix is metric and appropriately
-				// magnifying/reducing
-				if (!Metric.DECIMAL_PREFIXES.contains(prefix))
-					return false;
-				if (magnifying != prefix.getMultiplier() > 1)
-					return false;
-					
-				// check if the current prefix is correct
-				// since part is set *after* this check, part designates the state
-				// of the *previous* prefix
-				switch (part) {
-				case 0:
-					// do nothing, any prefix is valid after a yotta
-					break;
-				case 1:
-					// after a kilo-zetta, only deka/hecto are valid
-					if (Metric.THOUSAND_PREFIXES.contains(prefix))
-						return false;
-					break;
-				case 2:
-					// deka/hecto must be the last prefix, so this is always invalid
-					return false;
-				}
-				
-				// set part
-				if (Metric.YOTTA.equals(prefix) || Metric.YOCTO.equals(prefix)) {
-					part = 0;
-				} else if (Metric.THOUSAND_PREFIXES.contains(prefix)) {
-					part = 1;
-				} else {
-					part = 2;
-				}
-			}
-			return true;
-		}
-	};
-}
diff --git a/src/main/java/sevenUnits/converterGUI/DelegateListModel.java b/src/main/java/sevenUnits/converterGUI/DelegateListModel.java
deleted file mode 100644
index dd8cc97..0000000
--- a/src/main/java/sevenUnits/converterGUI/DelegateListModel.java
+++ /dev/null
@@ -1,242 +0,0 @@
-/**
- * Copyright (C) 2018 Adrien Hopkins
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the 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.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package sevenUnits.converterGUI;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Iterator;
-import java.util.List;
-import java.util.ListIterator;
-
-import javax.swing.AbstractListModel;
-
-/**
- * A list model that delegates to a list.
- * <p>
- * It is recommended to use the delegate methods in DelegateListModel instead of the delegated list's methods because
- * the delegate methods handle updating the list.
- * </p>
- * 
- * @author Adrien Hopkins
- * @since 2019-01-14
- * @since v0.1.0
- */
-final class DelegateListModel<E> extends AbstractListModel<E> implements List<E> {
-	/**
-	 * @since 2019-01-14
-	 * @since v0.1.0
-	 */
-	private static final long serialVersionUID = 8985494428224810045L;
-
-	/**
-	 * The list that this model is a delegate to.
-	 * 
-	 * @since 2019-01-14
-	 * @since v0.1.0
-	 */
-	private final List<E> delegate;
-
-	/**
-	 * Creates an empty {@code DelegateListModel}.
-	 * 
-	 * @since 2019-04-13
-	 */
-	public DelegateListModel() {
-		this(new ArrayList<>());
-	}
-
-	/**
-	 * Creates the {@code DelegateListModel}.
-	 * 
-	 * @param delegate
-	 *            list to delegate
-	 * @since 2019-01-14
-	 * @since v0.1.0
-	 */
-	public DelegateListModel(final List<E> delegate) {
-		this.delegate = delegate;
-	}
-
-	@Override
-	public boolean add(final E element) {
-		final int index = this.delegate.size();
-		final boolean success = this.delegate.add(element);
-		this.fireIntervalAdded(this, index, index);
-		return success;
-	}
-
-	@Override
-	public void add(final int index, final E element) {
-		this.delegate.add(index, element);
-		this.fireIntervalAdded(this, index, index);
-	}
-
-	@Override
-	public boolean addAll(final Collection<? extends E> c) {
-		boolean changed = false;
-		for (final E e : c) {
-			if (this.add(e)) {
-				changed = true;
-			}
-		}
-		return changed;
-	}
-
-	@Override
-	public boolean addAll(final int index, final Collection<? extends E> c) {
-		for (final E e : c) {
-			this.add(index, e);
-		}
-		return !c.isEmpty(); // Since this is a list, it will always change if c has elements.
-	}
-
-	@Override
-	public void clear() {
-		final int oldSize = this.delegate.size();
-		this.delegate.clear();
-		if (oldSize >= 1) {
-			this.fireIntervalRemoved(this, 0, oldSize - 1);
-		}
-	}
-
-	@Override
-	public boolean contains(final Object elem) {
-		return this.delegate.contains(elem);
-	}
-
-	@Override
-	public boolean containsAll(final Collection<?> c) {
-		for (final Object e : c) {
-			if (!c.contains(e))
-				return false;
-		}
-		return true;
-	}
-
-	@Override
-	public E get(final int index) {
-		return this.delegate.get(index);
-	}
-
-	@Override
-	public E getElementAt(final int index) {
-		return this.delegate.get(index);
-	}
-
-	@Override
-	public int getSize() {
-		return this.delegate.size();
-	}
-
-	@Override
-	public int indexOf(final Object elem) {
-		return this.delegate.indexOf(elem);
-	}
-
-	@Override
-	public boolean isEmpty() {
-		return this.delegate.isEmpty();
-	}
-
-	@Override
-	public Iterator<E> iterator() {
-		return this.delegate.iterator();
-	}
-
-	@Override
-	public int lastIndexOf(final Object elem) {
-		return this.delegate.lastIndexOf(elem);
-	}
-
-	@Override
-	public ListIterator<E> listIterator() {
-		return this.delegate.listIterator();
-	}
-
-	@Override
-	public ListIterator<E> listIterator(final int index) {
-		return this.delegate.listIterator(index);
-	}
-
-	@Override
-	public E remove(final int index) {
-		final E returnValue = this.delegate.get(index);
-		this.delegate.remove(index);
-		this.fireIntervalRemoved(this, index, index);
-		return returnValue;
-	}
-
-	@Override
-	public boolean remove(final Object o) {
-		final int index = this.delegate.indexOf(o);
-		final boolean returnValue = this.delegate.remove(o);
-		this.fireIntervalRemoved(this, index, index);
-		return returnValue;
-	}
-
-	@Override
-	public boolean removeAll(final Collection<?> c) {
-		boolean changed = false;
-		for (final Object e : c) {
-			if (this.remove(e)) {
-				changed = true;
-			}
-		}
-		return changed;
-	}
-
-	@Override
-	public boolean retainAll(final Collection<?> c) {
-		final int oldSize = this.size();
-		final boolean returnValue = this.delegate.retainAll(c);
-		this.fireIntervalRemoved(this, this.size(), oldSize - 1);
-		return returnValue;
-	}
-
-	@Override
-	public E set(final int index, final E element) {
-		final E returnValue = this.delegate.get(index);
-		this.delegate.set(index, element);
-		this.fireContentsChanged(this, index, index);
-		return returnValue;
-	}
-
-	@Override
-	public int size() {
-		return this.delegate.size();
-	}
-
-	@Override
-	public List<E> subList(final int fromIndex, final int toIndex) {
-		return this.delegate.subList(fromIndex, toIndex);
-	}
-
-	@Override
-	public Object[] toArray() {
-		return this.delegate.toArray();
-	}
-
-	@Override
-	public <T> T[] toArray(final T[] a) {
-		return this.delegate.toArray(a);
-	}
-
-	@Override
-	public String toString() {
-		return this.delegate.toString();
-	}
-}
diff --git a/src/main/java/sevenUnits/converterGUI/FilterComparator.java b/src/main/java/sevenUnits/converterGUI/FilterComparator.java
deleted file mode 100644
index edd00e2..0000000
--- a/src/main/java/sevenUnits/converterGUI/FilterComparator.java
+++ /dev/null
@@ -1,129 +0,0 @@
-/**
- * Copyright (C) 2018 Adrien Hopkins
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the 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.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package sevenUnits.converterGUI;
-
-import java.util.Comparator;
-import java.util.Objects;
-
-/**
- * A comparator that compares strings using a filter.
- * 
- * @author Adrien Hopkins
- * @since 2019-01-15
- * @since v0.1.0
- */
-final class FilterComparator implements Comparator<String> {
-	/**
-	 * The filter that the comparator is filtered by.
-	 * 
-	 * @since 2019-01-15
-	 * @since v0.1.0
-	 */
-	private final String filter;
-	/**
-	 * The comparator to use if the arguments are otherwise equal.
-	 * 
-	 * @since 2019-01-15
-	 * @since v0.1.0
-	 */
-	private final Comparator<String> comparator;
-	/**
-	 * Whether or not the comparison is case-sensitive.
-	 * 
-	 * @since 2019-04-14
-	 * @since v0.2.0
-	 */
-	private final boolean caseSensitive;
-
-	/**
-	 * Creates the {@code FilterComparator}.
-	 * 
-	 * @param filter
-	 * @since 2019-01-15
-	 * @since v0.1.0
-	 */
-	public FilterComparator(final String filter) {
-		this(filter, null);
-	}
-
-	/**
-	 * Creates the {@code FilterComparator}.
-	 * 
-	 * @param filter
-	 *            string to filter by
-	 * @param comparator
-	 *            comparator to fall back to if all else fails, null is compareTo.
-	 * @throws NullPointerException
-	 *             if filter is null
-	 * @since 2019-01-15
-	 * @since v0.1.0
-	 */
-	public FilterComparator(final String filter, final Comparator<String> comparator) {
-		this(filter, comparator, false);
-	}
-
-	/**
-	 * Creates the {@code FilterComparator}.
-	 * 
-	 * @param filter
-	 *            string to filter by
-	 * @param comparator
-	 *            comparator to fall back to if all else fails, null is compareTo.
-	 * @param caseSensitive
-	 *            whether or not the comparator is case-sensitive
-	 * @throws NullPointerException
-	 *             if filter is null
-	 * @since 2019-04-14
-	 * @since v0.2.0
-	 */
-	public FilterComparator(final String filter, final Comparator<String> comparator, final boolean caseSensitive) {
-		this.filter = Objects.requireNonNull(filter, "filter must not be null.");
-		this.comparator = comparator;
-		this.caseSensitive = caseSensitive;
-	}
-
-	@Override
-	public int compare(final String arg0, final String arg1) {
-		// if this is case insensitive, make them lowercase
-		final String str0, str1;
-		if (this.caseSensitive) {
-			str0 = arg0;
-			str1 = arg1;
-		} else {
-			str0 = arg0.toLowerCase();
-			str1 = arg1.toLowerCase();
-		}
-
-		// elements that start with the filter always go first
-		if (str0.startsWith(this.filter) && !str1.startsWith(this.filter))
-			return -1;
-		else if (!str0.startsWith(this.filter) && str1.startsWith(this.filter))
-			return 1;
-
-		// elements that contain the filter but don't start with them go next
-		if (str0.contains(this.filter) && !str1.contains(this.filter))
-			return -1;
-		else if (!str0.contains(this.filter) && !str1.contains(this.filter))
-			return 1;
-
-		// other elements go last
-		if (this.comparator == null)
-			return str0.compareTo(str1);
-		else
-			return this.comparator.compare(str0, str1);
-	}
-}
diff --git a/src/main/java/sevenUnits/converterGUI/GridBagBuilder.java b/src/main/java/sevenUnits/converterGUI/GridBagBuilder.java
deleted file mode 100644
index 0b71d78..0000000
--- a/src/main/java/sevenUnits/converterGUI/GridBagBuilder.java
+++ /dev/null
@@ -1,479 +0,0 @@
-/**
- * Copyright (C) 2018 Adrien Hopkins
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the 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.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package sevenUnits.converterGUI;
-
-import java.awt.GridBagConstraints;
-import java.awt.Insets;
-
-/**
- * A builder for Java's {@link java.awt.GridBagConstraints} class.
- * 
- * @author Adrien Hopkins
- * @since 2018-11-30
- * @since v0.1.0
- */
-final class GridBagBuilder {
-	/**
-	 * The built {@code GridBagConstraints}'s {@code gridx} property.
-	 * <p>
-	 * Specifies the cell containing the leading edge of the component's display area, where the first cell in a row has
-	 * <code>gridx=0</code>. The leading edge of a component's display area is its left edge for a horizontal,
-	 * left-to-right container and its right edge for a horizontal, right-to-left container. The value
-	 * <code>RELATIVE</code> specifies that the component be placed immediately following the component that was added
-	 * to the container just before this component was added.
-	 * <p>
-	 * The default value is <code>RELATIVE</code>. <code>gridx</code> should be a non-negative value.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#gridy
-	 * @see java.awt.ComponentOrientation
-	 */
-	private final int gridx;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code gridy} property.
-	 * <p>
-	 * Specifies the cell at the top of the component's display area, where the topmost cell has <code>gridy=0</code>.
-	 * The value <code>RELATIVE</code> specifies that the component be placed just below the component that was added to
-	 * the container just before this component was added.
-	 * <p>
-	 * The default value is <code>RELATIVE</code>. <code>gridy</code> should be a non-negative value.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#gridx
-	 */
-	private final int gridy;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code gridwidth} property.
-	 * <p>
-	 * Specifies the number of cells in a row for the component's display area.
-	 * <p>
-	 * Use <code>REMAINDER</code> to specify that the component's display area will be from <code>gridx</code> to the
-	 * last cell in the row. Use <code>RELATIVE</code> to specify that the component's display area will be from
-	 * <code>gridx</code> to the next to the last one in its row.
-	 * <p>
-	 * <code>gridwidth</code> should be non-negative and the default value is 1.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#gridheight
-	 */
-	private final int gridwidth;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code gridheight} property.
-	 * <p>
-	 * Specifies the number of cells in a column for the component's display area.
-	 * <p>
-	 * Use <code>REMAINDER</code> to specify that the component's display area will be from <code>gridy</code> to the
-	 * last cell in the column. Use <code>RELATIVE</code> to specify that the component's display area will be from
-	 * <code>gridy</code> to the next to the last one in its column.
-	 * <p>
-	 * <code>gridheight</code> should be a non-negative value and the default value is 1.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#gridwidth
-	 */
-	private final int gridheight;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code weightx} property.
-	 * <p>
-	 * Specifies how to distribute extra horizontal space.
-	 * <p>
-	 * The grid bag layout manager calculates the weight of a column to be the maximum <code>weightx</code> of all the
-	 * components in a column. If the resulting layout is smaller horizontally than the area it needs to fill, the extra
-	 * space is distributed to each column in proportion to its weight. A column that has a weight of zero receives no
-	 * extra space.
-	 * <p>
-	 * If all the weights are zero, all the extra space appears between the grids of the cell and the left and right
-	 * edges.
-	 * <p>
-	 * The default value of this field is <code>0</code>. <code>weightx</code> should be a non-negative value.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#weighty
-	 */
-	private double weightx;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code weighty} property.
-	 * <p>
-	 * Specifies how to distribute extra vertical space.
-	 * <p>
-	 * The grid bag layout manager calculates the weight of a row to be the maximum <code>weighty</code> of all the
-	 * components in a row. If the resulting layout is smaller vertically than the area it needs to fill, the extra
-	 * space is distributed to each row in proportion to its weight. A row that has a weight of zero receives no extra
-	 * space.
-	 * <p>
-	 * If all the weights are zero, all the extra space appears between the grids of the cell and the top and bottom
-	 * edges.
-	 * <p>
-	 * The default value of this field is <code>0</code>. <code>weighty</code> should be a non-negative value.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#weightx
-	 */
-	private double weighty;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code anchor} property.
-	 * <p>
-	 * This field is used when the component is smaller than its display area. It determines where, within the display
-	 * area, to place the component.
-	 * <p>
-	 * There are three kinds of possible values: orientation relative, baseline relative and absolute. Orientation
-	 * relative values are interpreted relative to the container's component orientation property, baseline relative
-	 * values are interpreted relative to the baseline and absolute values are not. The absolute values are:
-	 * <code>CENTER</code>, <code>NORTH</code>, <code>NORTHEAST</code>, <code>EAST</code>, <code>SOUTHEAST</code>,
-	 * <code>SOUTH</code>, <code>SOUTHWEST</code>, <code>WEST</code>, and <code>NORTHWEST</code>. The orientation
-	 * relative values are: <code>PAGE_START</code>, <code>PAGE_END</code>, <code>LINE_START</code>,
-	 * <code>LINE_END</code>, <code>FIRST_LINE_START</code>, <code>FIRST_LINE_END</code>, <code>LAST_LINE_START</code>
-	 * and <code>LAST_LINE_END</code>. The baseline relative values are: <code>BASELINE</code>,
-	 * <code>BASELINE_LEADING</code>, <code>BASELINE_TRAILING</code>, <code>ABOVE_BASELINE</code>,
-	 * <code>ABOVE_BASELINE_LEADING</code>, <code>ABOVE_BASELINE_TRAILING</code>, <code>BELOW_BASELINE</code>,
-	 * <code>BELOW_BASELINE_LEADING</code>, and <code>BELOW_BASELINE_TRAILING</code>. The default value is
-	 * <code>CENTER</code>.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.ComponentOrientation
-	 */
-	private int anchor;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code fill} property.
-	 * <p>
-	 * This field is used when the component's display area is larger than the component's requested size. It determines
-	 * whether to resize the component, and if so, how.
-	 * <p>
-	 * The following values are valid for <code>fill</code>:
-	 *
-	 * <ul>
-	 * <li><code>NONE</code>: Do not resize the component.
-	 * <li><code>HORIZONTAL</code>: Make the component wide enough to fill its display area horizontally, but do not
-	 * change its height.
-	 * <li><code>VERTICAL</code>: Make the component tall enough to fill its display area vertically, but do not change
-	 * its width.
-	 * <li><code>BOTH</code>: Make the component fill its display area entirely.
-	 * </ul>
-	 * <p>
-	 * The default value is <code>NONE</code>.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 */
-	private int fill;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code insets} property.
-	 * <p>
-	 * This field specifies the external padding of the component, the minimum amount of space between the component and
-	 * the edges of its display area.
-	 * <p>
-	 * The default value is <code>new Insets(0, 0, 0, 0)</code>.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 */
-	private Insets insets;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code ipadx} property.
-	 * <p>
-	 * This field specifies the internal padding of the component, how much space to add to the minimum width of the
-	 * component. The width of the component is at least its minimum width plus <code>ipadx</code> pixels.
-	 * <p>
-	 * The default value is <code>0</code>.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#ipady
-	 */
-	private int ipadx;
-
-	/**
-	 * The built {@code GridBagConstraints}'s {@code ipady} property.
-	 * <p>
-	 * This field specifies the internal padding, that is, how much space to add to the minimum height of the component.
-	 * The height of the component is at least its minimum height plus <code>ipady</code> pixels.
-	 * <p>
-	 * The default value is 0.
-	 * 
-	 * @serial
-	 * @see #clone()
-	 * @see java.awt.GridBagConstraints#ipadx
-	 */
-	private int ipady;
-
-	/**
-	 * @param gridx
-	 *            x position
-	 * @param gridy
-	 *            y position
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder(final int gridx, final int gridy) {
-		this(gridx, gridy, 1, 1);
-	}
-
-	/**
-	 * @param gridx
-	 *            x position
-	 * @param gridy
-	 *            y position
-	 * @param gridwidth
-	 *            number of cells occupied horizontally
-	 * @param gridheight
-	 *            number of cells occupied vertically
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder(final int gridx, final int gridy, final int gridwidth, final int gridheight) {
-		this(gridx, gridy, gridwidth, gridheight, 0.0, 0.0, GridBagConstraints.CENTER, GridBagConstraints.NONE,
-				new Insets(0, 0, 0, 0), 0, 0);
-	}
-
-	/**
-	 * @param gridx
-	 *            x position
-	 * @param gridy
-	 *            y position
-	 * @param gridwidth
-	 *            number of cells occupied horizontally
-	 * @param gridheight
-	 *            number of cells occupied vertically
-	 * @param weightx
-	 * @param weighty
-	 * @param anchor
-	 * @param fill
-	 * @param insets
-	 * @param ipadx
-	 * @param ipady
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	private GridBagBuilder(final int gridx, final int gridy, final int gridwidth, final int gridheight,
-			final double weightx, final double weighty, final int anchor, final int fill, final Insets insets,
-			final int ipadx, final int ipady) {
-		super();
-		this.gridx = gridx;
-		this.gridy = gridy;
-		this.gridwidth = gridwidth;
-		this.gridheight = gridheight;
-		this.weightx = weightx;
-		this.weighty = weighty;
-		this.anchor = anchor;
-		this.fill = fill;
-		this.insets = (Insets) insets.clone();
-		this.ipadx = ipadx;
-		this.ipady = ipady;
-	}
-
-	/**
-	 * @return {@code GridBagConstraints} created by this builder
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagConstraints build() {
-		return new GridBagConstraints(this.gridx, this.gridy, this.gridwidth, this.gridheight, this.weightx,
-				this.weighty, this.anchor, this.fill, this.insets, this.ipadx, this.ipady);
-	}
-
-	/**
-	 * @return anchor
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getAnchor() {
-		return this.anchor;
-	}
-
-	/**
-	 * @return fill
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getFill() {
-		return this.fill;
-	}
-
-	/**
-	 * @return gridheight
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getGridheight() {
-		return this.gridheight;
-	}
-
-	/**
-	 * @return gridwidth
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getGridwidth() {
-		return this.gridwidth;
-	}
-
-	/**
-	 * @return gridx
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getGridx() {
-		return this.gridx;
-	}
-
-	/**
-	 * @return gridy
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getGridy() {
-		return this.gridy;
-	}
-
-	/**
-	 * @return insets
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public Insets getInsets() {
-		return this.insets;
-	}
-
-	/**
-	 * @return ipadx
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getIpadx() {
-		return this.ipadx;
-	}
-
-	/**
-	 * @return ipady
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public int getIpady() {
-		return this.ipady;
-	}
-
-	/**
-	 * @return weightx
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public double getWeightx() {
-		return this.weightx;
-	}
-
-	/**
-	 * @return weighty
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public double getWeighty() {
-		return this.weighty;
-	}
-
-	/**
-	 * @param anchor
-	 *            anchor to set
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder setAnchor(final int anchor) {
-		this.anchor = anchor;
-		return this;
-	}
-
-	/**
-	 * @param fill
-	 *            fill to set
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder setFill(final int fill) {
-		this.fill = fill;
-		return this;
-	}
-
-	/**
-	 * @param insets
-	 *            insets to set
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder setInsets(final Insets insets) {
-		this.insets = insets;
-		return this;
-	}
-
-	/**
-	 * @param ipadx
-	 *            ipadx to set
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder setIpadx(final int ipadx) {
-		this.ipadx = ipadx;
-		return this;
-	}
-
-	/**
-	 * @param ipady
-	 *            ipady to set
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder setIpady(final int ipady) {
-		this.ipady = ipady;
-		return this;
-	}
-
-	/**
-	 * @param weightx
-	 *            weightx to set
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder setWeightx(final double weightx) {
-		this.weightx = weightx;
-		return this;
-	}
-
-	/**
-	 * @param weighty
-	 *            weighty to set
-	 * @since 2018-11-30
-	 * @since v0.1.0
-	 */
-	public GridBagBuilder setWeighty(final double weighty) {
-		this.weighty = weighty;
-		return this;
-	}
-}
diff --git a/src/main/java/sevenUnits/converterGUI/MutablePredicate.java b/src/main/java/sevenUnits/converterGUI/MutablePredicate.java
deleted file mode 100644
index ae6b7a1..0000000
--- a/src/main/java/sevenUnits/converterGUI/MutablePredicate.java
+++ /dev/null
@@ -1,70 +0,0 @@
-/**
- * Copyright (C) 2019 Adrien Hopkins
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the 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.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package sevenUnits.converterGUI;
-
-import java.util.function.Predicate;
-
-/**
- * A container for a predicate, which can be changed later.
- * 
- * @author Adrien Hopkins
- * @since 2019-04-13
- * @since v0.2.0
- */
-final class MutablePredicate<T> implements Predicate<T> {
-	/**
-	 * The predicate stored in this {@code MutablePredicate}
-	 * 
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	private Predicate<T> predicate;
-
-	/**
-	 * Creates the {@code MutablePredicate}.
-	 * 
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public MutablePredicate(final Predicate<T> predicate) {
-		this.predicate = predicate;
-	}
-
-	/**
-	 * @return predicate
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public final Predicate<T> getPredicate() {
-		return this.predicate;
-	}
-
-	/**
-	 * @param predicate
-	 *            new value of predicate
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public final void setPredicate(final Predicate<T> predicate) {
-		this.predicate = predicate;
-	}
-
-	@Override
-	public boolean test(final T t) {
-		return this.predicate.test(t);
-	}
-}
diff --git a/src/main/java/sevenUnits/converterGUI/SearchBoxList.java b/src/main/java/sevenUnits/converterGUI/SearchBoxList.java
deleted file mode 100644
index 2aa9fce..0000000
--- a/src/main/java/sevenUnits/converterGUI/SearchBoxList.java
+++ /dev/null
@@ -1,320 +0,0 @@
-/**
- * Copyright (C) 2019 Adrien Hopkins
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the 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.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package sevenUnits.converterGUI;
-
-import java.awt.BorderLayout;
-import java.awt.Color;
-import java.awt.event.FocusEvent;
-import java.awt.event.FocusListener;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Comparator;
-import java.util.function.Predicate;
-
-import javax.swing.JList;
-import javax.swing.JPanel;
-import javax.swing.JScrollPane;
-import javax.swing.JTextField;
-
-/**
- * @author Adrien Hopkins
- * @since 2019-04-13
- * @since v0.2.0
- */
-final class SearchBoxList extends JPanel {
-	
-	/**
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	private static final long serialVersionUID = 6226930279415983433L;
-	
-	/**
-	 * The text to place in an empty search box.
-	 * 
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	private static final String EMPTY_TEXT = "Search...";
-	
-	/**
-	 * The color to use for an empty foreground.
-	 * 
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	private static final Color EMPTY_FOREGROUND = new Color(192, 192, 192);
-	
-	// the components
-	private final Collection<String> itemsToFilter;
-	private final DelegateListModel<String> listModel;
-	private final JTextField searchBox;
-	private final JList<String> searchItems;
-	
-	private boolean searchBoxEmpty = true;
-	
-	// I need to do this because, for some reason, Swing is auto-focusing my
-	// search box without triggering a focus
-	// event.
-	private boolean searchBoxFocused = false;
-	
-	private Predicate<String> customSearchFilter = o -> true;
-	private final Comparator<String> defaultOrdering;
-	private final boolean caseSensitive;
-	
-	/**
-	 * Creates the {@code SearchBoxList}.
-	 * 
-	 * @param itemsToFilter items to put in the list
-	 * @since 2019-04-14
-	 */
-	public SearchBoxList(final Collection<String> itemsToFilter) {
-		this(itemsToFilter, null, false);
-	}
-	
-	/**
-	 * Creates the {@code SearchBoxList}.
-	 * 
-	 * @param itemsToFilter   items to put in the list
-	 * @param defaultOrdering default ordering of items after filtration
-	 *                        (null=Comparable)
-	 * @param caseSensitive   whether or not the filtration is case-sensitive
-	 * 
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public SearchBoxList(final Collection<String> itemsToFilter,
-			final Comparator<String> defaultOrdering,
-			final boolean caseSensitive) {
-		super(new BorderLayout(), true);
-		this.itemsToFilter = new ArrayList<>(itemsToFilter);
-		this.defaultOrdering = defaultOrdering;
-		this.caseSensitive = caseSensitive;
-		
-		// create the components
-		this.listModel = new DelegateListModel<>(new ArrayList<>(itemsToFilter));
-		this.searchItems = new JList<>(this.listModel);
-		
-		this.searchBox = new JTextField(EMPTY_TEXT);
-		this.searchBox.setForeground(EMPTY_FOREGROUND);
-		
-		// add them to the panel
-		this.add(this.searchBox, BorderLayout.PAGE_START);
-		this.add(new JScrollPane(this.searchItems), BorderLayout.CENTER);
-		
-		// set up the search box
-		this.searchBox.addFocusListener(new FocusListener() {
-			@Override
-			public void focusGained(final FocusEvent e) {
-				SearchBoxList.this.searchBoxFocusGained(e);
-			}
-			
-			@Override
-			public void focusLost(final FocusEvent e) {
-				SearchBoxList.this.searchBoxFocusLost(e);
-			}
-		});
-		
-		this.searchBox.addCaretListener(e -> this.searchBoxTextChanged());
-		this.searchBoxEmpty = true;
-	}
-	
-	/**
-	 * Adds an additional filter for searching.
-	 * 
-	 * @param filter filter to add.
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public void addSearchFilter(final Predicate<String> filter) {
-		this.customSearchFilter = this.customSearchFilter.and(filter);
-	}
-	
-	/**
-	 * Resets the search filter.
-	 * 
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public void clearSearchFilters() {
-		this.customSearchFilter = o -> true;
-	}
-	
-	/**
-	 * @return this component's search box component
-	 * @since 2019-04-14
-	 * @since v0.2.0
-	 */
-	public final JTextField getSearchBox() {
-		return this.searchBox;
-	}
-	
-	/**
-	 * @param searchText text to search for
-	 * @return a filter that filters out that text, based on this list's case
-	 *         sensitive setting
-	 * @since 2019-04-14
-	 * @since v0.2.0
-	 */
-	private Predicate<String> getSearchFilter(final String searchText) {
-		if (this.caseSensitive)
-			return string -> string.contains(searchText);
-		else
-			return string -> string.toLowerCase()
-					.contains(searchText.toLowerCase());
-	}
-	
-	/**
-	 * @return this component's list component
-	 * @since 2019-04-14
-	 * @since v0.2.0
-	 */
-	public final JList<String> getSearchList() {
-		return this.searchItems;
-	}
-	
-	/**
-	 * @return index selected in item list
-	 * @since 2019-04-14
-	 * @since v0.2.0
-	 */
-	public int getSelectedIndex() {
-		return this.searchItems.getSelectedIndex();
-	}
-	
-	/**
-	 * @return value selected in item list
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public String getSelectedValue() {
-		return this.searchItems.getSelectedValue();
-	}
-	
-	/**
-	 * Re-applies the filters.
-	 * 
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	public void reapplyFilter() {
-		final String searchText = this.searchBoxEmpty ? ""
-				: this.searchBox.getText();
-		final FilterComparator comparator = new FilterComparator(searchText,
-				this.defaultOrdering, this.caseSensitive);
-		final Predicate<String> searchFilter = this.getSearchFilter(searchText);
-		
-		this.listModel.clear();
-		this.itemsToFilter.forEach(string -> {
-			if (searchFilter.test(string)) {
-				this.listModel.add(string);
-			}
-		});
-		
-		// applies the custom filters
-		this.listModel.removeIf(this.customSearchFilter.negate());
-		
-		// sorts the remaining items
-		this.listModel.sort(comparator);
-	}
-	
-	/**
-	 * Runs whenever the search box gains focus.
-	 * 
-	 * @param e focus event
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	private void searchBoxFocusGained(final FocusEvent e) {
-		this.searchBoxFocused = true;
-		if (this.searchBoxEmpty) {
-			this.searchBox.setText("");
-			this.searchBox.setForeground(Color.BLACK);
-		}
-	}
-	
-	/**
-	 * Runs whenever the search box loses focus.
-	 * 
-	 * @param e focus event
-	 * @since 2019-04-13
-	 * @since v0.2.0
-	 */
-	private void searchBoxFocusLost(final FocusEvent e) {
-		this.searchBoxFocused = false;
-		if (this.searchBoxEmpty) {
-			this.searchBox.setText(EMPTY_TEXT);
-			this.searchBox.setForeground(EMPTY_FOREGROUND);
-		}
-	}
-	
-	/**
-	 * Runs whenever the text in the search box is changed.
-	 * <p>
-	 * Reapplies the search filter, and custom filters.
-	 * </p>
-	 * 
-	 * @since 2019-04-14
-	 * @since v0.2.0
-	 */
-	private void searchBoxTextChanged() {
-		if (this.searchBoxFocused) {
-			this.searchBoxEmpty = this.searchBox.getText().equals("");
-		}
-		final String searchText = this.searchBoxEmpty ? ""
-				: this.searchBox.getText();
-		final FilterComparator comparator = new FilterComparator(searchText,
-				this.defaultOrdering, this.caseSensitive);
-		final Predicate<String> searchFilter = this.getSearchFilter(searchText);
-		
-		// initialize list with items that match the filter then sort
-		this.listModel.clear();
-		this.itemsToFilter.forEach(string -> {
-			if (searchFilter.test(string)) {
-				this.listModel.add(string);
-			}
-		});
-		
-		// applies the custom filters
-		this.listModel.removeIf(this.customSearchFilter.negate());
-		
-		// sorts the remaining items
-		this.listModel.sort(comparator);
-	}
-	
-	/**
-	 * Resets the search box list's contents to the provided items, removing any
-	 * old items
-	 *
-	 * @param newItems new items to put in list
-	 * @since 2021-05-22
-	 */
-	public void setItems(Collection<String> newItems) {
-		this.itemsToFilter.clear();
-		this.itemsToFilter.addAll(newItems);
-		this.reapplyFilter();
-	}
-	
-	/**
-	 * Manually updates the search box's item list.
-	 * 
-	 * @since 2020-08-27
-	 */
-	public void updateList() {
-		this.searchBoxTextChanged();
-	}
-}
diff --git a/src/main/java/sevenUnits/converterGUI/SevenUnitsGUI.java b/src/main/java/sevenUnits/converterGUI/SevenUnitsGUI.java
deleted file mode 100644
index 309bdb9..0000000
--- a/src/main/java/sevenUnits/converterGUI/SevenUnitsGUI.java
+++ /dev/null
@@ -1,1506 +0,0 @@
-/**
- * Copyright (C) 2018-2021 Adrien Hopkins
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the 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.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package sevenUnits.converterGUI;
-
-import java.awt.BorderLayout;
-import java.awt.GridBagConstraints;
-import java.awt.GridBagLayout;
-import java.awt.GridLayout;
-import java.awt.event.KeyEvent;
-import java.io.BufferedWriter;
-import java.io.IOException;
-import java.io.InputStream;
-import java.math.BigDecimal;
-import java.math.MathContext;
-import java.math.RoundingMode;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.text.DecimalFormat;
-import java.text.NumberFormat;
-import java.text.ParseException;
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.HashSet;
-import java.util.List;
-import java.util.NoSuchElementException;
-import java.util.Scanner;
-import java.util.Set;
-import java.util.function.Predicate;
-import java.util.stream.Collectors;
-
-import javax.swing.BorderFactory;
-import javax.swing.BoxLayout;
-import javax.swing.ButtonGroup;
-import javax.swing.JButton;
-import javax.swing.JCheckBox;
-import javax.swing.JComboBox;
-import javax.swing.JFormattedTextField;
-import javax.swing.JFrame;
-import javax.swing.JLabel;
-import javax.swing.JOptionPane;
-import javax.swing.JPanel;
-import javax.swing.JRadioButton;
-import javax.swing.JScrollPane;
-import javax.swing.JSlider;
-import javax.swing.JTabbedPane;
-import javax.swing.JTextArea;
-import javax.swing.JTextField;
-import javax.swing.UIManager;
-import javax.swing.UnsupportedLookAndFeelException;
-import javax.swing.WindowConstants;
-import javax.swing.border.TitledBorder;
-
-import sevenUnits.ProgramInfo;
-import sevenUnits.unit.BaseDimension;
-import sevenUnits.unit.BritishImperial;
-import sevenUnits.unit.LinearUnit;
-import sevenUnits.unit.LinearUnitValue;
-import sevenUnits.unit.Metric;
-import sevenUnits.unit.Unit;
-import sevenUnits.unit.UnitDatabase;
-import sevenUnits.unit.UnitPrefix;
-import sevenUnits.unit.UnitValue;
-import sevenUnits.utils.ConditionalExistenceCollections;
-import sevenUnits.utils.NameSymbol;
-import sevenUnits.utils.ObjectProduct;
-
-/**
- * @author Adrien Hopkins
- * @since 2018-12-27
- * @since v0.1.0
- */
-final class SevenUnitsGUI {
-	/**
-	 * A tab in the View.
-	 */
-	private enum Pane {
-		UNIT_CONVERTER, EXPRESSION_CONVERTER, UNIT_VIEWER, PREFIX_VIEWER, ABOUT,
-		SETTINGS;
-	}
-	
-	private static class Presenter {
-		/** The default place where settings are stored. */
-		private static final String DEFAULT_SETTINGS_FILEPATH = "settings.txt";
-		/** The default place where units are stored. */
-		private static final String DEFAULT_UNITS_FILEPATH = "/unitsfile.txt";
-		/** The default place where dimensions are stored. */
-		private static final String DEFAULT_DIMENSIONS_FILEPATH = "/dimensionfile.txt";
-		/** The default place where exceptions are stored. */
-		private static final String DEFAULT_EXCEPTIONS_FILEPATH = "/metric_exceptions.txt";
-		
-		/**
-		 * Adds default units and dimensions to a database.
-		 * 
-		 * @param database database to add to
-		 * @since 2019-04-14
-		 * @since v0.2.0
-		 */
-		private static void addDefaults(final UnitDatabase database) {
-			database.addUnit("metre", Metric.METRE);
-			database.addUnit("kilogram", Metric.KILOGRAM);
-			database.addUnit("gram", Metric.KILOGRAM.dividedBy(1000));
-			database.addUnit("second", Metric.SECOND);
-			database.addUnit("ampere", Metric.AMPERE);
-			database.addUnit("kelvin", Metric.KELVIN);
-			database.addUnit("mole", Metric.MOLE);
-			database.addUnit("candela", Metric.CANDELA);
-			database.addUnit("bit", Metric.BIT);
-			database.addUnit("unit", Metric.ONE);
-			// nonlinear units - must be loaded manually
-			database.addUnit("tempCelsius", Metric.CELSIUS);
-			database.addUnit("tempFahrenheit", BritishImperial.FAHRENHEIT);
-			
-			// load initial dimensions
-			database.addDimension("LENGTH", Metric.Dimensions.LENGTH);
-			database.addDimension("MASS", Metric.Dimensions.MASS);
-			database.addDimension("TIME", Metric.Dimensions.TIME);
-			database.addDimension("TEMPERATURE", Metric.Dimensions.TEMPERATURE);
-		}
-		
-		/**
-		 * Gets the text of a resource file as a set of strings (each one is one
-		 * line of the text).
-		 *
-		 * @param filename filename to get resource from
-		 * @return contents of file
-		 * @since 2021-03-27
-		 */
-		public static final List<String> getLinesFromResource(String filename) {
-			final List<String> lines = new ArrayList<>();
-			
-			try (InputStream stream = inputStream(filename);
-					Scanner scanner = new Scanner(stream)) {
-				while (scanner.hasNextLine()) {
-					lines.add(scanner.nextLine());
-				}
-			} catch (final IOException e) {
-				throw new AssertionError(
-						"Error occurred while loading file " + filename, e);
-			}
-			
-			return lines;
-		}
-		
-		/**
-		 * Gets an input stream for a resource file.
-		 *
-		 * @param filepath file to use as resource
-		 * @return obtained Path
-		 * @since 2021-03-27
-		 */
-		private static final InputStream inputStream(String filepath) {
-			return SevenUnitsGUI.class.getResourceAsStream(filepath);
-		}
-		
-		/**
-		 * @return {@code line} with any comments removed.
-		 * @since 2021-03-13
-		 */
-		private static final String withoutComments(String line) {
-			final int index = line.indexOf('#');
-			return index == -1 ? line : line.substring(index);
-		}
-		
-		/** The presenter's associated view. */
-		private final View view;
-		
-		/** The units known by the program. */
-		private final UnitDatabase database;
-		
-		/** The names of all of the units */
-		private final List<String> unitNames;
-		
-		/** The names of all of the prefixes */
-		private final List<String> prefixNames;
-		
-		/** The names of all of the dimensions */
-		private final List<String> dimensionNames;
-		
-		/** Unit names that are ignored by the metric-only/imperial-only filter */
-		private final Set<String> metricExceptions;
-		
-		private final Comparator<String> prefixNameComparator;
-		
-		/** A boolean remembering whether or not one-way conversion is on */
-		private boolean oneWay = true;
-		/** The prefix rule */
-		private DefaultPrefixRepetitionRule prefixRule = null;
-		
-		// conditions for existence of From and To entries
-		// used for one-way conversion
-		private final MutablePredicate<String> fromExistenceCondition = new MutablePredicate<>(
-				s -> true);
-		
-		private final MutablePredicate<String> toExistenceCondition = new MutablePredicate<>(
-				s -> true);
-		
-		/*
-		 * Rounding-related settings. I am using my own system, and not
-		 * MathContext, because MathContext does not support decimal place based
-		 * or scientific rounding, only significant digit based rounding.
-		 */
-		private int precision = 6;
-		
-		private RoundingType roundingType = RoundingType.SIGNIFICANT_DIGITS;
-		
-		// The "include duplicate units" setting
-		private boolean includeDuplicateUnits = true;
-		
-		/**
-		 * Creates the presenter.
-		 * 
-		 * @param view presenter's associated view
-		 * @since 2018-12-27
-		 * @since v0.1.0
-		 */
-		Presenter(final View view) {
-			this.view = view;
-			
-			// load initial units
-			this.database = new UnitDatabase(
-					DefaultPrefixRepetitionRule.NO_RESTRICTION);
-			Presenter.addDefaults(this.database);
-			
-			// load units and prefixes
-			try (final InputStream units = inputStream(DEFAULT_UNITS_FILEPATH)) {
-				this.database.loadUnitsFromStream(units);
-			} catch (final IOException e) {
-				throw new AssertionError("Loading of unitsfile.txt failed.", e);
-			}
-			
-			// load dimensions
-			try (final InputStream dimensions = inputStream(
-					DEFAULT_DIMENSIONS_FILEPATH)) {
-				this.database.loadDimensionsFromStream(dimensions);
-			} catch (final IOException e) {
-				throw new AssertionError("Loading of dimensionfile.txt failed.", e);
-			}
-			
-			// load metric exceptions
-			try {
-				this.metricExceptions = new HashSet<>();
-				try (InputStream exceptions = inputStream(
-						DEFAULT_EXCEPTIONS_FILEPATH);
-						Scanner scanner = new Scanner(exceptions)) {
-					while (scanner.hasNextLine()) {
-						final String line = Presenter
-								.withoutComments(scanner.nextLine());
-						if (!line.isBlank()) {
-							this.metricExceptions.add(line);
-						}
-					}
-				}
-			} catch (final IOException e) {
-				throw new AssertionError("Loading of metric_exceptions.txt failed.",
-						e);
-			}
-			
-			// load settings - requires database to exist
-			if (Files.exists(this.getSettingsFile())) {
-				this.loadSettings();
-			}
-			
-			// a comparator that can be used to compare prefix names
-			// any name that does not exist is less than a name that does.
-			// otherwise, they are compared by value
-			this.prefixNameComparator = (o1, o2) -> {
-				if (!Presenter.this.database.containsPrefixName(o1))
-					return -1;
-				else if (!Presenter.this.database.containsPrefixName(o2))
-					return 1;
-				
-				final UnitPrefix p1 = Presenter.this.database.getPrefix(o1);
-				final UnitPrefix p2 = Presenter.this.database.getPrefix(o2);
-				
-				if (p1.getMultiplier() < p2.getMultiplier())
-					return -1;
-				else if (p1.getMultiplier() > p2.getMultiplier())
-					return 1;
-				
-				return o1.compareTo(o2);
-			};
-			
-			this.unitNames = new ArrayList<>(
-					this.database.unitMapPrefixless(true).keySet());
-			this.unitNames.sort(null); // sorts it using Comparable
-			
-			this.prefixNames = new ArrayList<>(
-					this.database.prefixMap(true).keySet());
-			this.prefixNames.sort(this.prefixNameComparator); // sorts it using my
-																				// comparator
-			
-			this.dimensionNames = new DelegateListModel<>(
-					new ArrayList<>(this.database.dimensionMap().keySet()));
-			this.dimensionNames.sort(null); // sorts it using Comparable
-			
-			// a Predicate that returns true iff the argument is a full base unit
-			final Predicate<Unit> isFullBase = unit -> unit instanceof LinearUnit
-					&& ((LinearUnit) unit).isBase();
-			
-			// print out unit counts
-			System.out.printf(
-					"Successfully loaded %d units with %d unit names (%d base units).%n",
-					this.database.unitMapPrefixless(false).size(),
-					this.database.unitMapPrefixless(true).size(),
-					this.database.unitMapPrefixless(false).values().stream()
-							.filter(isFullBase).count());
-		}
-		
-		/**
-		 * Converts in the dimension-based converter
-		 * 
-		 * @since 2019-04-13
-		 * @since v0.2.0
-		 */
-		public final void convertDimensionBased() {
-			final String fromSelection = this.view.getFromSelection();
-			if (fromSelection == null) {
-				this.view.showErrorDialog("Error",
-						"No unit selected in From field");
-				return;
-			}
-			final String toSelection = this.view.getToSelection();
-			if (toSelection == null) {
-				this.view.showErrorDialog("Error", "No unit selected in To field");
-				return;
-			}
-			
-			final Unit from = this.database.getUnit(fromSelection);
-			final Unit to = this.database.getUnit(toSelection)
-					.withName(NameSymbol.ofName(toSelection));
-			
-			final UnitValue beforeValue;
-			try {
-				beforeValue = UnitValue.of(from,
-						this.view.getDimensionConverterInput());
-			} catch (final ParseException e) {
-				this.view.showErrorDialog("Error",
-						"Error in parsing: " + e.getMessage());
-				return;
-			}
-			final UnitValue value = beforeValue.convertTo(to);
-			
-			final String output = this.getRoundedString(value);
-			
-			this.view.setDimensionConverterOutputText(
-					String.format("%s = %s", beforeValue, output));
-		}
-		
-		/**
-		 * Runs whenever the convert button is pressed.
-		 * 
-		 * <p>
-		 * Reads and parses a unit expression from the from and to boxes, then
-		 * converts {@code from} to {@code to}. Any errors are shown in
-		 * JOptionPanes.
-		 * </p>
-		 * 
-		 * @since 2019-01-26
-		 * @since v0.1.0
-		 */
-		public final void convertExpressions() {
-			final String fromUnitString = this.view.getFromText();
-			final String toUnitString = this.view.getToText();
-			
-			if (fromUnitString.isEmpty()) {
-				this.view.showErrorDialog("Parse Error",
-						"Please enter a unit expression in the From: box.");
-				return;
-			}
-			if (toUnitString.isEmpty()) {
-				this.view.showErrorDialog("Parse Error",
-						"Please enter a unit expression in the To: box.");
-				return;
-			}
-			
-			final LinearUnitValue from;
-			final Unit to;
-			try {
-				from = this.database.evaluateUnitExpression(fromUnitString);
-			} catch (final IllegalArgumentException | NoSuchElementException e) {
-				this.view.showErrorDialog("Parse Error",
-						"Could not recognize text in From entry: " + e.getMessage());
-				return;
-			}
-			try {
-				to = this.database.getUnitFromExpression(toUnitString);
-			} catch (final IllegalArgumentException | NoSuchElementException e) {
-				this.view.showErrorDialog("Parse Error",
-						"Could not recognize text in To entry: " + e.getMessage());
-				return;
-			}
-			
-			if (to instanceof LinearUnit) {
-				// convert to LinearUnitValue
-				final LinearUnitValue from2;
-				final LinearUnit to2 = ((LinearUnit) to)
-						.withName(NameSymbol.ofName(toUnitString));
-				final boolean useSlash;
-				
-				if (from.canConvertTo(to2)) {
-					from2 = from;
-					useSlash = false;
-				} else if (LinearUnitValue.ONE.dividedBy(from).canConvertTo(to2)) {
-					from2 = LinearUnitValue.ONE.dividedBy(from);
-					useSlash = true;
-				} else {
-					// if I can't convert, leave
-					this.view.showErrorDialog("Conversion Error",
-							String.format("Cannot convert between %s and %s",
-									fromUnitString, toUnitString));
-					return;
-				}
-				
-				final LinearUnitValue converted = from2.convertTo(to2);
-				this.view.setExpressionConverterOutputText((useSlash ? "1 / " : "")
-						+ String.format("%s = %s", fromUnitString,
-								this.getRoundedString(converted, false)));
-				return;
-			} else {
-				// convert to UnitValue
-				final UnitValue from2 = from.asUnitValue();
-				if (from2.canConvertTo(to)) {
-					final UnitValue converted = from2.convertTo(to);
-					
-					this.view
-							.setExpressionConverterOutputText(String.format("%s = %s",
-									fromUnitString, this.getRoundedString(converted)));
-				} else {
-					// if I can't convert, leave
-					this.view.showErrorDialog("Conversion Error",
-							String.format("Cannot convert between %s and %s",
-									fromUnitString, toUnitString));
-				}
-			}
-		}
-		
-		/**
-		 * @return a list of all of the unit dimensions
-		 * @since 2019-04-13
-		 * @since v0.2.0
-		 */
-		public final List<String> dimensionNameList() {
-			return this.dimensionNames;
-		}
-		
-		/**
-		 * @return a list of all the entries in the dimension-based converter's
-		 *         From box
-		 * @since 2020-08-27
-		 */
-		public final Set<String> fromEntries() {
-			return ConditionalExistenceCollections.conditionalExistenceSet(
-					this.unitNameSet(), this.fromExistenceCondition);
-		}
-		
-		/**
-		 * @return a comparator to compare prefix names
-		 * @since 2019-04-14
-		 * @since v0.2.0
-		 */
-		public final Comparator<String> getPrefixNameComparator() {
-			return this.prefixNameComparator;
-		}
-		
-		/**
-		 * Like {@link LinearUnitValue#toString(boolean)}, but obeys this unit
-		 * converter's rounding settings.
-		 * 
-		 * @since 2020-08-04
-		 */
-		private final String getRoundedString(final LinearUnitValue value,
-				boolean showUncertainty) {
-			switch (this.roundingType) {
-			case DECIMAL_PLACES:
-			case SIGNIFICANT_DIGITS:
-				return this.getRoundedString(value.asUnitValue());
-			case SCIENTIFIC:
-				return value.toString(showUncertainty, RoundingMode.HALF_EVEN);
-			default:
-				throw new AssertionError("Invalid switch condition.");
-			}
-		}
-		
-		/**
-		 * Like {@link UnitValue#toString()}, but obeys this unit converter's
-		 * rounding settings.
-		 * 
-		 * @since 2020-08-04
-		 */
-		private final String getRoundedString(final UnitValue value) {
-			final BigDecimal unrounded = new BigDecimal(value.getValue());
-			final BigDecimal rounded;
-			int precision = this.precision;
-			
-			switch (this.roundingType) {
-			case DECIMAL_PLACES:
-				rounded = unrounded.setScale(precision, RoundingMode.HALF_EVEN);
-				break;
-			case SCIENTIFIC:
-				precision = 12;
-				//$FALL-THROUGH$
-			case SIGNIFICANT_DIGITS:
-				rounded = unrounded
-						.round(new MathContext(precision, RoundingMode.HALF_EVEN));
-				break;
-			default:
-				throw new AssertionError("Invalid switch condition.");
-			}
-			
-			String output = rounded.toString();
-			
-			// remove trailing zeroes
-			if (output.contains(".")) {
-				while (output.endsWith("0")) {
-					output = output.substring(0, output.length() - 1);
-				}
-				if (output.endsWith(".")) {
-					output = output.substring(0, output.length() - 1);
-				}
-			}
-			
-			return output + " " + value.getUnit().getPrimaryName().get();
-		}
-		
-		/**
-		 * @return The file where settings are stored;
-		 * @since 2020-12-11
-		 */
-		private final Path getSettingsFile() {
-			return Path.of(DEFAULT_SETTINGS_FILEPATH);
-		}
-		
-		/**
-		 * Loads settings from the settings file.
-		 * 
-		 * @since 2021-02-17
-		 */
-		public final void loadSettings() {
-			try {
-				// read file line by line
-				final int lineNum = 0;
-				for (final String line : Files
-						.readAllLines(this.getSettingsFile())) {
-					final int equalsIndex = line.indexOf('=');
-					if (equalsIndex == -1)
-						throw new IllegalStateException(
-								"Settings file is malformed at line " + lineNum);
-					
-					final String param = line.substring(0, equalsIndex);
-					final String value = line.substring(equalsIndex + 1);
-					
-					switch (param) {
-					// set manually to avoid the unnecessary saving of the non-manual
-					// methods
-					case "precision":
-						this.precision = Integer.valueOf(value);
-						break;
-					case "rounding_type":
-						this.roundingType = RoundingType.valueOf(value);
-						break;
-					case "prefix_rule":
-						this.prefixRule = DefaultPrefixRepetitionRule.valueOf(value);
-						this.database.setPrefixRepetitionRule(this.prefixRule);
-						break;
-					case "one_way":
-						this.oneWay = Boolean.valueOf(value);
-						if (this.oneWay) {
-							this.fromExistenceCondition.setPredicate(
-									unitName -> this.metricExceptions.contains(unitName)
-											|| !this.database.getUnit(unitName)
-													.isMetric());
-							this.toExistenceCondition.setPredicate(
-									unitName -> this.metricExceptions.contains(unitName)
-											|| this.database.getUnit(unitName).isMetric());
-						} else {
-							this.fromExistenceCondition.setPredicate(unitName -> true);
-							this.toExistenceCondition.setPredicate(unitName -> true);
-						}
-						break;
-					case "include_duplicates":
-						this.includeDuplicateUnits = Boolean.valueOf(value);
-						if (this.view.presenter != null) {
-							this.view.update();
-						}
-						break;
-					default:
-						System.err.printf("Warning: unrecognized setting \"%s\".",
-								param);
-						break;
-					}
-				}
-			} catch (final IOException e) {}
-		}
-		
-		/**
-		 * @return a set of all prefix names in the database
-		 * @since 2019-04-14
-		 * @since v0.2.0
-		 */
-		public final Set<String> prefixNameSet() {
-			return this.database.prefixMap(true).keySet();
-		}
-		
-		/**
-		 * Runs whenever a prefix is selected in the viewer.
-		 * <p>
-		 * Shows its information in the text box to the right.
-		 * </p>
-		 * 
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public final void prefixSelected() {
-			final String prefixName = this.view.getPrefixViewerSelection();
-			if (prefixName == null)
-				return;
-			else {
-				final UnitPrefix prefix = this.database.getPrefix(prefixName);
-				
-				this.view.setPrefixTextBoxText(String.format("%s%nMultiplier: %s",
-						prefixName, prefix.getMultiplier()));
-			}
-		}
-		
-		/**
-		 * Saves the settings to the settings file.
-		 *
-		 * @since 2021-02-17
-		 */
-		public final void saveSettings() {
-			try (BufferedWriter writer = Files
-					.newBufferedWriter(this.getSettingsFile())) {
-				writer.write(String.format("precision=%d\n", this.precision));
-				writer.write(
-						String.format("rounding_type=%s\n", this.roundingType));
-				writer.write(String.format("prefix_rule=%s\n", this.prefixRule));
-				writer.write(String.format("one_way=%s\n", this.oneWay));
-				writer.write(String.format("include_duplicates=%s\n",
-						this.includeDuplicateUnits));
-			} catch (final IOException e) {
-				e.printStackTrace();
-				this.view.showErrorDialog("I/O Error",
-						"Error occurred while saving settings: "
-								+ e.getLocalizedMessage());
-			}
-		}
-		
-		public final void setIncludeDuplicateUnits(
-				boolean includeDuplicateUnits) {
-			this.includeDuplicateUnits = includeDuplicateUnits;
-			
-			this.view.update();
-			this.saveSettings();
-		}
-		
-		/**
-		 * Enables or disables one-way conversion.
-		 * 
-		 * @param oneWay whether one-way conversion should be on (true) or off
-		 *               (false)
-		 * @since 2020-08-27
-		 */
-		public final void setOneWay(boolean oneWay) {
-			this.oneWay = oneWay;
-			if (oneWay) {
-				this.fromExistenceCondition.setPredicate(
-						unitName -> this.metricExceptions.contains(unitName)
-								|| !this.database.getUnit(unitName).isMetric());
-				this.toExistenceCondition.setPredicate(
-						unitName -> this.metricExceptions.contains(unitName)
-								|| this.database.getUnit(unitName).isMetric());
-			} else {
-				this.fromExistenceCondition.setPredicate(unitName -> true);
-				this.toExistenceCondition.setPredicate(unitName -> true);
-			}
-			
-			this.saveSettings();
-		}
-		
-		/**
-		 * @param precision new value of precision
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public final void setPrecision(final int precision) {
-			this.precision = precision;
-			
-			this.saveSettings();
-		}
-		
-		/**
-		 * @param prefixRepetitionRule the prefixRepetitionRule to set
-		 * @since 2020-08-26
-		 */
-		public void setPrefixRepetitionRule(
-				Predicate<List<UnitPrefix>> prefixRepetitionRule) {
-			if (prefixRepetitionRule instanceof DefaultPrefixRepetitionRule) {
-				this.prefixRule = (DefaultPrefixRepetitionRule) prefixRepetitionRule;
-			} else {
-				this.prefixRule = null;
-			}
-			this.database.setPrefixRepetitionRule(prefixRepetitionRule);
-			
-			this.saveSettings();
-		}
-		
-		/**
-		 * @param roundingType the roundingType to set
-		 * @since 2020-07-16
-		 */
-		public final void setRoundingType(RoundingType roundingType) {
-			this.roundingType = roundingType;
-			
-			this.saveSettings();
-		}
-		
-		/**
-		 * @return a list of all the entries in the dimension-based converter's To
-		 *         box
-		 * @since 2020-08-27
-		 */
-		public final Set<String> toEntries() {
-			return ConditionalExistenceCollections.conditionalExistenceSet(
-					this.unitNameSet(), this.toExistenceCondition);
-		}
-		
-		/**
-		 * Returns true if and only if the unit represented by {@code unitName}
-		 * has the dimension represented by {@code dimensionName}.
-		 * 
-		 * @param unitName      name of unit to test
-		 * @param dimensionName name of dimension to test
-		 * @return whether unit has dimenision
-		 * @since 2019-04-13
-		 * @since v0.2.0
-		 */
-		public final boolean unitMatchesDimension(final String unitName,
-				final String dimensionName) {
-			final Unit unit = this.database.getUnit(unitName);
-			final ObjectProduct<BaseDimension> dimension = this.database
-					.getDimension(dimensionName);
-			return unit.getDimension().equals(dimension);
-		}
-		
-		/**
-		 * Runs whenever a unit is selected in the viewer.
-		 * <p>
-		 * Shows its information in the text box to the right.
-		 * </p>
-		 * 
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public final void unitNameSelected() {
-			final String unitName = this.view.getUnitViewerSelection();
-			if (unitName == null)
-				return;
-			else {
-				final Unit unit = this.database.getUnit(unitName);
-				
-				this.view.setUnitTextBoxText(unit.toString());
-			}
-		}
-		
-		/**
-		 * @return a set of all of the unit names
-		 * @since 2019-04-14
-		 * @since v0.2.0
-		 */
-		public final Set<String> unitNameSet() {
-			return this.database.unitMapPrefixless(this.includeDuplicateUnits)
-					.keySet();
-		}
-	}
-	
-	/**
-	 * Different types of rounding.
-	 * 
-	 * Significant digits: Rounds to a number of digits. i.e. with precision 5,
-	 * 12345.6789 rounds to 12346. Decimal places: Rounds to a number of digits
-	 * after the decimal point, i.e. with precision 5, 12345.6789 rounds to
-	 * 12345.67890. Scientific: Rounds based on the number of digits and
-	 * operations, following standard scientific rounding.
-	 */
-	private static enum RoundingType {
-		SIGNIFICANT_DIGITS, DECIMAL_PLACES, SCIENTIFIC;
-	}
-	
-	private static class View {
-		private static final NumberFormat NUMBER_FORMATTER = new DecimalFormat();
-		
-		/** The view's frame. */
-		private final JFrame frame;
-		/** The view's associated presenter. */
-		private final Presenter presenter;
-		/** The master pane containing all of the tabs. */
-		private final JTabbedPane masterPane;
-		
-		// DIMENSION-BASED CONVERTER
-		/** The panel for inputting values in the dimension-based converter */
-		private final JTextField valueInput;
-		/** The panel for "From" in the dimension-based converter */
-		private final SearchBoxList fromSearch;
-		/** The panel for "To" in the dimension-based converter */
-		private final SearchBoxList toSearch;
-		/** The output area in the dimension-based converter */
-		private final JTextArea dimensionBasedOutput;
-		
-		// EXPRESSION-BASED CONVERTER
-		/** The "From" entry in the conversion panel */
-		private final JTextField fromEntry;
-		/** The "To" entry in the conversion panel */
-		private final JTextField toEntry;
-		/** The output area in the conversion panel */
-		private final JTextArea output;
-		
-		// UNIT AND PREFIX VIEWERS
-		/** The searchable list of unit names in the unit viewer */
-		private final SearchBoxList unitNameList;
-		/** The searchable list of prefix names in the prefix viewer */
-		private final SearchBoxList prefixNameList;
-		/** The text box for unit data in the unit viewer */
-		private final JTextArea unitTextBox;
-		/** The text box for prefix data in the prefix viewer */
-		private final JTextArea prefixTextBox;
-		
-		/**
-		 * Creates the {@code View}.
-		 * 
-		 * @since 2019-01-14
-		 * @since v0.1.0
-		 */
-		public View() {
-			this.presenter = new Presenter(this);
-			this.frame = new JFrame("7Units");
-			this.frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
-			
-			// enable system look and feel
-			try {
-				UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
-			} catch (ClassNotFoundException | InstantiationException
-					| IllegalAccessException | UnsupportedLookAndFeelException e) {
-				// oh well, just use default theme
-				System.err.println("Failed to enable system look-and-feel.");
-				e.printStackTrace();
-			}
-			
-			// create the components
-			this.masterPane = new JTabbedPane();
-			this.unitNameList = new SearchBoxList(this.presenter.unitNameSet());
-			this.prefixNameList = new SearchBoxList(this.presenter.prefixNameSet(),
-					this.presenter.getPrefixNameComparator(), true);
-			this.unitTextBox = new JTextArea();
-			this.prefixTextBox = new JTextArea();
-			this.fromSearch = new SearchBoxList(this.presenter.fromEntries());
-			this.toSearch = new SearchBoxList(this.presenter.toEntries());
-			this.valueInput = new JFormattedTextField(NUMBER_FORMATTER);
-			this.dimensionBasedOutput = new JTextArea(2, 32);
-			this.fromEntry = new JTextField();
-			this.toEntry = new JTextField();
-			this.output = new JTextArea(2, 32);
-			
-			// create more components
-			this.initComponents();
-			
-			this.frame.pack();
-		}
-		
-		/**
-		 * @return the currently selected pane.
-		 * @throws AssertionError if no pane (or an invalid pane) is selected
-		 */
-		public Pane getActivePane() {
-			switch (this.masterPane.getSelectedIndex()) {
-			case 0:
-				return Pane.UNIT_CONVERTER;
-			case 1:
-				return Pane.EXPRESSION_CONVERTER;
-			case 2:
-				return Pane.UNIT_VIEWER;
-			case 3:
-				return Pane.PREFIX_VIEWER;
-			case 4:
-				return Pane.ABOUT;
-			case 5:
-				return Pane.SETTINGS;
-			default:
-				throw new AssertionError("No selected pane, or invalid pane.");
-			}
-		}
-		
-		/**
-		 * @return value in dimension-based converter
-		 * @throws ParseException
-		 * @since 2020-07-07
-		 */
-		public double getDimensionConverterInput() throws ParseException {
-			final Number value = NUMBER_FORMATTER.parse(this.valueInput.getText());
-			if (value instanceof Double)
-				return (double) value;
-			else if (value instanceof Long)
-				return ((Long) value).longValue();
-			else
-				throw new AssertionError();
-		}
-		
-		/**
-		 * @return selection in "From" selector in dimension-based converter
-		 * @since 2019-04-13
-		 * @since v0.2.0
-		 */
-		public String getFromSelection() {
-			return this.fromSearch.getSelectedValue();
-		}
-		
-		/**
-		 * @return text in "From" box in converter panel
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public String getFromText() {
-			return this.fromEntry.getText();
-		}
-		
-		/**
-		 * @return index of selected prefix in prefix viewer
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public String getPrefixViewerSelection() {
-			return this.prefixNameList.getSelectedValue();
-		}
-		
-		/**
-		 * @return selection in "To" selector in dimension-based converter
-		 * @since 2019-04-13
-		 * @since v0.2.0
-		 */
-		public String getToSelection() {
-			return this.toSearch.getSelectedValue();
-		}
-		
-		/**
-		 * @return text in "To" box in converter panel
-		 * @since 2019-01-26
-		 * @since v0.1.0
-		 */
-		public String getToText() {
-			return this.toEntry.getText();
-		}
-		
-		/**
-		 * @return index of selected unit in unit viewer
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public String getUnitViewerSelection() {
-			return this.unitNameList.getSelectedValue();
-		}
-		
-		/**
-		 * Starts up the application.
-		 * 
-		 * @since 2018-12-27
-		 * @since v0.1.0
-		 */
-		public final void init() {
-			this.frame.setVisible(true);
-		}
-		
-		/**
-		 * Initializes the view's components.
-		 * 
-		 * @since 2018-12-27
-		 * @since v0.1.0
-		 */
-		private final void initComponents() {
-			final JPanel masterPanel = new JPanel();
-			this.frame.add(masterPanel);
-			
-			masterPanel.setLayout(new BorderLayout());
-			
-			{ // pane with all of the tabs
-				masterPanel.add(this.masterPane, BorderLayout.CENTER);
-				
-				// update stuff
-				this.masterPane.addChangeListener(e -> this.update());
-				
-				{ // a panel for unit conversion using a selector
-					final JPanel convertUnitPanel = new JPanel();
-					this.masterPane.addTab("Convert Units", convertUnitPanel);
-					this.masterPane.setMnemonicAt(0, KeyEvent.VK_U);
-					
-					convertUnitPanel.setLayout(new BorderLayout());
-					
-					{ // panel for input part
-						final JPanel inputPanel = new JPanel();
-						convertUnitPanel.add(inputPanel, BorderLayout.CENTER);
-						
-						inputPanel.setLayout(new GridLayout(1, 3));
-						
-						final JComboBox<String> dimensionSelector = new JComboBox<>(
-								this.presenter.dimensionNameList()
-										.toArray(new String[0]));
-						dimensionSelector.setSelectedItem("LENGTH");
-						
-						// handle dimension filter
-						final MutablePredicate<String> dimensionFilter = new MutablePredicate<>(
-								s -> true);
-						
-						// panel for From things
-						inputPanel.add(this.fromSearch);
-						
-						this.fromSearch.addSearchFilter(dimensionFilter);
-						
-						{ // for dimension selector and arrow that represents
-							// conversion
-							final JPanel inBetweenPanel = new JPanel();
-							inputPanel.add(inBetweenPanel);
-							
-							inBetweenPanel.setLayout(new BorderLayout());
-							
-							{ // dimension selector
-								inBetweenPanel.add(dimensionSelector,
-										BorderLayout.PAGE_START);
-							}
-							
-							{ // the arrow in the middle
-								final JLabel arrowLabel = new JLabel("->");
-								inBetweenPanel.add(arrowLabel, BorderLayout.CENTER);
-							}
-						}
-						
-						// panel for To things
-						
-						inputPanel.add(this.toSearch);
-						
-						this.toSearch.addSearchFilter(dimensionFilter);
-						
-						// code for dimension filter
-						dimensionSelector.addItemListener(e -> {
-							dimensionFilter.setPredicate(string -> View.this.presenter
-									.unitMatchesDimension(string,
-											(String) dimensionSelector.getSelectedItem()));
-							this.fromSearch.reapplyFilter();
-							this.toSearch.reapplyFilter();
-						});
-						
-						// apply the item listener once because I have a default
-						// selection
-						dimensionFilter.setPredicate(string -> View.this.presenter
-								.unitMatchesDimension(string,
-										(String) dimensionSelector.getSelectedItem()));
-						this.fromSearch.reapplyFilter();
-						this.toSearch.reapplyFilter();
-					}
-					
-					{ // panel for submit and output, and also value entry
-						final JPanel outputPanel = new JPanel();
-						convertUnitPanel.add(outputPanel, BorderLayout.PAGE_END);
-						
-						outputPanel.setLayout(new GridLayout(3, 1));
-						
-						{ // unit input
-							final JPanel valueInputPanel = new JPanel();
-							outputPanel.add(valueInputPanel);
-							
-							valueInputPanel.setLayout(new BorderLayout());
-							
-							{ // prompt
-								final JLabel valuePrompt = new JLabel(
-										"Value to convert: ");
-								valueInputPanel.add(valuePrompt,
-										BorderLayout.LINE_START);
-							}
-							
-							{ // value to convert
-								valueInputPanel.add(this.valueInput,
-										BorderLayout.CENTER);
-							}
-						}
-						
-						{ // button to convert
-							final JButton convertButton = new JButton("Convert");
-							outputPanel.add(convertButton);
-							
-							convertButton.addActionListener(
-									e -> this.presenter.convertDimensionBased());
-							convertButton.setMnemonic(KeyEvent.VK_ENTER);
-						}
-						
-						{ // output of conversion
-							outputPanel.add(this.dimensionBasedOutput);
-							this.dimensionBasedOutput.setEditable(false);
-						}
-					}
-				}
-				
-				{ // panel for unit conversion using expressions
-					final JPanel convertExpressionPanel = new JPanel();
-					this.masterPane.addTab("Convert Unit Expressions",
-							convertExpressionPanel);
-					this.masterPane.setMnemonicAt(1, KeyEvent.VK_E);
-					
-					convertExpressionPanel.setLayout(new GridLayout(4, 1));
-					
-					{ // panel for units to convert from
-						final JPanel fromPanel = new JPanel();
-						convertExpressionPanel.add(fromPanel);
-						
-						fromPanel.setBorder(BorderFactory.createTitledBorder("From"));
-						fromPanel.setLayout(new GridLayout(1, 1));
-						
-						{ // entry for units
-							fromPanel.add(this.fromEntry);
-						}
-					}
-					
-					{ // panel for units to convert to
-						final JPanel toPanel = new JPanel();
-						convertExpressionPanel.add(toPanel);
-						
-						toPanel.setBorder(BorderFactory.createTitledBorder("To"));
-						toPanel.setLayout(new GridLayout(1, 1));
-						
-						{ // entry for units
-							toPanel.add(this.toEntry);
-						}
-					}
-					
-					{ // button to convert
-						final JButton convertButton = new JButton("Convert");
-						convertExpressionPanel.add(convertButton);
-						
-						convertButton.addActionListener(
-								e -> this.presenter.convertExpressions());
-						convertButton.setMnemonic(KeyEvent.VK_ENTER);
-					}
-					
-					{ // output of conversion
-						final JPanel outputPanel = new JPanel();
-						convertExpressionPanel.add(outputPanel);
-						
-						outputPanel
-								.setBorder(BorderFactory.createTitledBorder("Output"));
-						outputPanel.setLayout(new GridLayout(1, 1));
-						
-						{ // output
-							outputPanel.add(this.output);
-							this.output.setEditable(false);
-						}
-					}
-				}
-				
-				{ // panel to look up units
-					final JPanel unitLookupPanel = new JPanel();
-					this.masterPane.addTab("Unit Viewer", unitLookupPanel);
-					this.masterPane.setMnemonicAt(2, KeyEvent.VK_V);
-					
-					unitLookupPanel.setLayout(new GridLayout());
-					
-					{ // search panel
-						unitLookupPanel.add(this.unitNameList);
-						
-						this.unitNameList.getSearchList().addListSelectionListener(
-								e -> this.presenter.unitNameSelected());
-					}
-					
-					{ // the text box for unit's toString
-						unitLookupPanel.add(this.unitTextBox);
-						this.unitTextBox.setEditable(false);
-						this.unitTextBox.setLineWrap(true);
-					}
-				}
-				
-				{ // panel to look up prefixes
-					final JPanel prefixLookupPanel = new JPanel();
-					this.masterPane.addTab("Prefix Viewer", prefixLookupPanel);
-					this.masterPane.setMnemonicAt(3, KeyEvent.VK_P);
-					
-					prefixLookupPanel.setLayout(new GridLayout(1, 2));
-					
-					{ // panel for listing and seaching
-						prefixLookupPanel.add(this.prefixNameList);
-						
-						this.prefixNameList.getSearchList().addListSelectionListener(
-								e -> this.presenter.prefixSelected());
-					}
-					
-					{ // the text box for prefix's toString
-						prefixLookupPanel.add(this.prefixTextBox);
-						this.prefixTextBox.setEditable(false);
-						this.prefixTextBox.setLineWrap(true);
-					}
-				}
-				
-				{ // Info panel
-					final JPanel infoPanel = new JPanel();
-					this.masterPane.addTab("\uD83D\uDEC8", // info (i) character
-							new JScrollPane(infoPanel));
-					
-					final JTextArea infoTextArea = new JTextArea();
-					infoTextArea.setEditable(false);
-					infoTextArea.setOpaque(false);
-					infoPanel.add(infoTextArea);
-					
-					// get info text
-					final String infoText = Presenter
-							.getLinesFromResource("/about.txt").stream()
-							.map(Presenter::withoutComments)
-							.collect(Collectors.joining("\n")).replaceAll(
-									"\\[VERSION\\]", ProgramInfo.VERSION.toString());
-					infoTextArea.setText(infoText);
-				}
-				
-				{ // Settings panel
-					final JPanel settingsPanel = new JPanel();
-					this.masterPane.addTab("\u2699", new JScrollPane(settingsPanel));
-					this.masterPane.setMnemonicAt(5, KeyEvent.VK_S);
-					
-					settingsPanel.setLayout(
-							new BoxLayout(settingsPanel, BoxLayout.PAGE_AXIS));
-					
-					{ // rounding settings
-						final JPanel roundingPanel = new JPanel();
-						settingsPanel.add(roundingPanel);
-						roundingPanel
-								.setBorder(new TitledBorder("Rounding Settings"));
-						roundingPanel.setLayout(new GridBagLayout());
-						
-						// rounding rule selection
-						final ButtonGroup roundingRuleButtons = new ButtonGroup();
-						
-						final JLabel roundingRuleLabel = new JLabel("Rounding Rule:");
-						roundingPanel.add(roundingRuleLabel, new GridBagBuilder(0, 0)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JRadioButton fixedPrecision = new JRadioButton(
-								"Fixed Precision");
-						if (this.presenter.roundingType == RoundingType.SIGNIFICANT_DIGITS) {
-							fixedPrecision.setSelected(true);
-						}
-						fixedPrecision.addActionListener(e -> this.presenter
-								.setRoundingType(RoundingType.SIGNIFICANT_DIGITS));
-						roundingRuleButtons.add(fixedPrecision);
-						roundingPanel.add(fixedPrecision, new GridBagBuilder(0, 1)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JRadioButton fixedDecimals = new JRadioButton(
-								"Fixed Decimal Places");
-						if (this.presenter.roundingType == RoundingType.DECIMAL_PLACES) {
-							fixedDecimals.setSelected(true);
-						}
-						fixedDecimals.addActionListener(e -> this.presenter
-								.setRoundingType(RoundingType.DECIMAL_PLACES));
-						roundingRuleButtons.add(fixedDecimals);
-						roundingPanel.add(fixedDecimals, new GridBagBuilder(0, 2)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JRadioButton relativePrecision = new JRadioButton(
-								"Scientific Precision");
-						if (this.presenter.roundingType == RoundingType.SCIENTIFIC) {
-							relativePrecision.setSelected(true);
-						}
-						relativePrecision.addActionListener(e -> this.presenter
-								.setRoundingType(RoundingType.SCIENTIFIC));
-						roundingRuleButtons.add(relativePrecision);
-						roundingPanel.add(relativePrecision, new GridBagBuilder(0, 3)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JLabel sliderLabel = new JLabel("Precision:");
-						roundingPanel.add(sliderLabel, new GridBagBuilder(0, 4)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JSlider sigDigSlider = new JSlider(0, 12);
-						roundingPanel.add(sigDigSlider, new GridBagBuilder(0, 5)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						sigDigSlider.setMajorTickSpacing(4);
-						sigDigSlider.setMinorTickSpacing(1);
-						sigDigSlider.setSnapToTicks(true);
-						sigDigSlider.setPaintTicks(true);
-						sigDigSlider.setPaintLabels(true);
-						sigDigSlider.setValue(this.presenter.precision);
-						
-						sigDigSlider.addChangeListener(e -> this.presenter
-								.setPrecision(sigDigSlider.getValue()));
-					}
-					
-					{ // prefix repetition settings
-						final JPanel prefixRepetitionPanel = new JPanel();
-						settingsPanel.add(prefixRepetitionPanel);
-						prefixRepetitionPanel.setBorder(
-								new TitledBorder("Prefix Repetition Settings"));
-						prefixRepetitionPanel.setLayout(new GridBagLayout());
-						
-						// prefix rules
-						final ButtonGroup prefixRuleButtons = new ButtonGroup();
-						
-						final JRadioButton noRepetition = new JRadioButton(
-								"No Repetition");
-						if (this.presenter.prefixRule == DefaultPrefixRepetitionRule.NO_REPETITION) {
-							noRepetition.setSelected(true);
-						}
-						noRepetition.addActionListener(
-								e -> this.presenter.setPrefixRepetitionRule(
-										DefaultPrefixRepetitionRule.NO_REPETITION));
-						prefixRuleButtons.add(noRepetition);
-						prefixRepetitionPanel.add(noRepetition,
-								new GridBagBuilder(0, 0)
-										.setAnchor(GridBagConstraints.LINE_START)
-										.build());
-						
-						final JRadioButton noRestriction = new JRadioButton(
-								"No Restriction");
-						if (this.presenter.prefixRule == DefaultPrefixRepetitionRule.NO_RESTRICTION) {
-							noRestriction.setSelected(true);
-						}
-						noRestriction.addActionListener(
-								e -> this.presenter.setPrefixRepetitionRule(
-										DefaultPrefixRepetitionRule.NO_RESTRICTION));
-						prefixRuleButtons.add(noRestriction);
-						prefixRepetitionPanel.add(noRestriction,
-								new GridBagBuilder(0, 1)
-										.setAnchor(GridBagConstraints.LINE_START)
-										.build());
-						
-						final JRadioButton customRepetition = new JRadioButton(
-								"Complex Repetition");
-						if (this.presenter.prefixRule == DefaultPrefixRepetitionRule.COMPLEX_REPETITION) {
-							customRepetition.setSelected(true);
-						}
-						customRepetition.addActionListener(
-								e -> this.presenter.setPrefixRepetitionRule(
-										DefaultPrefixRepetitionRule.COMPLEX_REPETITION));
-						prefixRuleButtons.add(customRepetition);
-						prefixRepetitionPanel.add(customRepetition,
-								new GridBagBuilder(0, 2)
-										.setAnchor(GridBagConstraints.LINE_START)
-										.build());
-					}
-					
-					{ // search settings
-						final JPanel searchingPanel = new JPanel();
-						settingsPanel.add(searchingPanel);
-						searchingPanel.setBorder(new TitledBorder("Search Settings"));
-						searchingPanel.setLayout(new GridBagLayout());
-						
-						// searching rules
-						final ButtonGroup searchRuleButtons = new ButtonGroup();
-						
-						final JRadioButton noPrefixes = new JRadioButton(
-								"Never Include Prefixed Units");
-						noPrefixes.setEnabled(false);
-						searchRuleButtons.add(noPrefixes);
-						searchingPanel.add(noPrefixes, new GridBagBuilder(0, 0)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JRadioButton fixedPrefixes = new JRadioButton(
-								"Include Some Prefixes");
-						fixedPrefixes.setEnabled(false);
-						searchRuleButtons.add(fixedPrefixes);
-						searchingPanel.add(fixedPrefixes, new GridBagBuilder(0, 1)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JRadioButton explicitPrefixes = new JRadioButton(
-								"Include Explicit Prefixes");
-						explicitPrefixes.setEnabled(false);
-						searchRuleButtons.add(explicitPrefixes);
-						searchingPanel.add(explicitPrefixes, new GridBagBuilder(0, 2)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JRadioButton alwaysInclude = new JRadioButton(
-								"Include All Single Prefixes");
-						alwaysInclude.setEnabled(false);
-						searchRuleButtons.add(alwaysInclude);
-						searchingPanel.add(alwaysInclude, new GridBagBuilder(0, 3)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-					}
-					
-					{ // miscellaneous settings
-						final JPanel miscPanel = new JPanel();
-						settingsPanel.add(miscPanel);
-						miscPanel
-								.setBorder(new TitledBorder("Miscellaneous Settings"));
-						miscPanel.setLayout(new GridBagLayout());
-						
-						final JCheckBox oneWay = new JCheckBox(
-								"Convert One Way Only");
-						oneWay.setSelected(this.presenter.oneWay);
-						oneWay.addItemListener(
-								e -> this.presenter.setOneWay(e.getStateChange() == 1));
-						miscPanel.add(oneWay, new GridBagBuilder(0, 0)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JCheckBox showAllVariations = new JCheckBox(
-								"Show Duplicates in \"Convert Units\"");
-						showAllVariations
-								.setSelected(this.presenter.includeDuplicateUnits);
-						showAllVariations.addItemListener(e -> this.presenter
-								.setIncludeDuplicateUnits(e.getStateChange() == 1));
-						miscPanel.add(showAllVariations, new GridBagBuilder(0, 1)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-						
-						final JButton unitFileButton = new JButton(
-								"Manage Unit Data Files");
-						unitFileButton.setEnabled(false);
-						miscPanel.add(unitFileButton, new GridBagBuilder(0, 2)
-								.setAnchor(GridBagConstraints.LINE_START).build());
-					}
-				}
-			}
-		}
-		
-		/**
-		 * Sets the text in the output of the dimension-based converter.
-		 * 
-		 * @param text text to set
-		 * @since 2019-04-13
-		 * @since v0.2.0
-		 */
-		public void setDimensionConverterOutputText(final String text) {
-			this.dimensionBasedOutput.setText(text);
-		}
-		
-		/**
-		 * Sets the text in the output of the conversion panel.
-		 * 
-		 * @param text text to set
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public void setExpressionConverterOutputText(final String text) {
-			this.output.setText(text);
-		}
-		
-		/**
-		 * Sets the text of the prefix text box in the prefix viewer.
-		 * 
-		 * @param text text to set
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public void setPrefixTextBoxText(final String text) {
-			this.prefixTextBox.setText(text);
-		}
-		
-		/**
-		 * Sets the text of the unit text box in the unit viewer.
-		 * 
-		 * @param text text to set
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public void setUnitTextBoxText(final String text) {
-			this.unitTextBox.setText(text);
-		}
-		
-		/**
-		 * Shows an error dialog.
-		 * 
-		 * @param title   title of dialog
-		 * @param message message in dialog
-		 * @since 2019-01-14
-		 * @since v0.1.0
-		 */
-		public void showErrorDialog(final String title, final String message) {
-			JOptionPane.showMessageDialog(this.frame, message, title,
-					JOptionPane.ERROR_MESSAGE);
-		}
-		
-		public void update() {
-			this.unitNameList.setItems(this.presenter.unitNameSet());
-			this.fromSearch.setItems(this.presenter.fromEntries());
-			this.toSearch.setItems(this.presenter.toEntries());
-			
-			switch (this.getActivePane()) {
-			case UNIT_CONVERTER:
-				this.fromSearch.updateList();
-				this.toSearch.updateList();
-				break;
-			default:
-				// do nothing, for now
-				break;
-			}
-		}
-	}
-	
-	public static void main(final String[] args) {
-		new View().init();
-	}
-}
diff --git a/src/main/java/sevenUnits/converterGUI/package-info.java b/src/main/java/sevenUnitsGUI/Main.java
index 784664f..b5a896f 100644
--- a/src/main/java/sevenUnits/converterGUI/package-info.java
+++ b/src/main/java/sevenUnitsGUI/Main.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2019 Adrien Hopkins
+ * Copyright (C) 2022 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -14,11 +14,21 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
+package sevenUnitsGUI;
+
 /**
- * The GUI interface of the Unit Converter.
- * 
- * @author Adrien Hopkins
- * @since 2019-01-25
- * @since v0.2.0
+ * The main code for the 7Units GUI
+ *
+ * @since 2022-04-19
  */
-package sevenUnits.converterGUI;
\ No newline at end of file
+public final class Main {
+	
+	/**
+	 * @param args
+	 * @since 2022-04-19
+	 */
+	public static void main(String[] args) {
+		View.createTabbedView();
+	}
+	
+}
diff --git a/src/main/java/sevenUnitsGUI/Presenter.java b/src/main/java/sevenUnitsGUI/Presenter.java
index fd050b7..4feea44 100644
--- a/src/main/java/sevenUnitsGUI/Presenter.java
+++ b/src/main/java/sevenUnitsGUI/Presenter.java
@@ -567,7 +567,7 @@ public final class Presenter {
 	 * @return true iff the One-Way Conversion feature is available (views that
 	 *         show units as a list will have metric units removed from the From
 	 *         unit list and imperial/USC units removed from the To unit list)
-	 * 
+	 * 			
 	 * @since 2022-03-30
 	 */
 	public boolean oneWayConversionEnabled() {
diff --git a/src/main/java/sevenUnitsGUI/TabbedView.java b/src/main/java/sevenUnitsGUI/TabbedView.java
index c8e69ee..be80ccb 100644
--- a/src/main/java/sevenUnitsGUI/TabbedView.java
+++ b/src/main/java/sevenUnitsGUI/TabbedView.java
@@ -124,87 +124,17 @@ final class TabbedView implements ExpressionConversionView, UnitConversionView {
 		 * Rounds to a fixed number of significant digits. Precision is used,
 		 * representing the number of significant digits to round to.
 		 */
-		SIGNIFICANT_DIGITS(true) {
-			@Override
-			public Function<UncertainDouble, String> getRuleFromPrecision(
-					int precision) {
-				return StandardDisplayRules.fixedPrecision(precision);
-			}
-		},
+		SIGNIFICANT_DIGITS,
 		/**
 		 * Rounds to a fixed number of decimal places. Precision is used,
 		 * representing the number of decimal places to round to.
 		 */
-		DECIMAL_PLACES(true) {
-			@Override
-			public Function<UncertainDouble, String> getRuleFromPrecision(
-					int precision) {
-				return StandardDisplayRules.fixedDecimals(precision);
-			}
-		},
+		DECIMAL_PLACES,
 		/**
 		 * Rounds according to UncertainDouble's toString method. The specified
 		 * precision is ignored.
 		 */
-		UNCERTAINTY(false) {
-			@Override
-			public Function<UncertainDouble, String> getRuleFromPrecision(
-					int precision) {
-				return StandardDisplayRules.uncertaintyBased();
-			}
-		};
-		
-		/**
-		 * If true, this type of rounding rule requires you to specify a
-		 * precision.
-		 */
-		private final boolean requiresPrecision;
-		
-		/**
-		 * @param canCustomizePrecision
-		 * @since 2022-04-18
-		 */
-		private StandardRoundingType(boolean requiresPrecision) {
-			this.requiresPrecision = requiresPrecision;
-		}
-		
-		/**
-		 * Gets a rounding rule of this type.
-		 *
-		 * @param precision the rounding type's precision. If
-		 *                  {@link #requiresPrecision} is false, this field will
-		 *                  be ignored.
-		 * @return rounding rule
-		 * @since 2022-04-18
-		 */
-		public abstract Function<UncertainDouble, String> getRuleFromPrecision(
-				int precision);
-		
-		/**
-		 * Tries to get this rule without specifying precision.
-		 *
-		 * @throws UnsupportedOperationException if this rule requires specifying
-		 *                                       precision
-		 * @since 2022-04-18
-		 */
-		public final Function<UncertainDouble, String> getRuleWithoutPrecision() {
-			if (this.requiresPrecision())
-				throw new UnsupportedOperationException("Rounding type " + this
-						+ " requires you to specify precision.");
-			else
-				// random number to mess with anyone who lies about whether or not
-				// precision is required
-				return this.getRuleFromPrecision(-623546735);
-		}
-		
-		/**
-		 * @return whether or not this rounding type requires you to specify an
-		 *         integer precision
-		 * @since 2022-04-18
-		 */
-		public boolean requiresPrecision() {
-			return this.requiresPrecision;
-		}
+		UNCERTAINTY;
 	}
 	
 	/**
diff --git a/src/main/java/sevenUnitsGUI/View.java b/src/main/java/sevenUnitsGUI/View.java
index 011e87f..b2d2b94 100644
--- a/src/main/java/sevenUnitsGUI/View.java
+++ b/src/main/java/sevenUnitsGUI/View.java
@@ -30,6 +30,14 @@ import sevenUnits.utils.NameSymbol;
  */
 public interface View {
 	/**
+	 * @return a new tabbed view
+	 * @since 2022-04-19
+	 */
+	static View createTabbedView() {
+		return new TabbedView();
+	}
+	
+	/**
 	 * @return the presenter associated with this view
 	 * @since 2022-04-19
 	 */
diff --git a/src/main/java/sevenUnitsGUI/ViewBot.java b/src/main/java/sevenUnitsGUI/ViewBot.java
index 9253ae5..a3ba7a2 100644
--- a/src/main/java/sevenUnitsGUI/ViewBot.java
+++ b/src/main/java/sevenUnitsGUI/ViewBot.java
@@ -34,7 +34,8 @@ import sevenUnits.utils.Nameable;
  * @author Adrien Hopkins
  * @since 2022-01-29
  */
-final class ViewBot implements UnitConversionView, ExpressionConversionView {
+public final class ViewBot
+		implements UnitConversionView, ExpressionConversionView {
 	/**
 	 * A record of the parameters given to
 	 * {@link View#showPrefix(NameSymbol, String)}, for testing.
diff --git a/src/test/java/sevenUnitsGUI/PresenterTest.java b/src/test/java/sevenUnitsGUI/PresenterTest.java
index f639329..3364e83 100644
--- a/src/test/java/sevenUnitsGUI/PresenterTest.java
+++ b/src/test/java/sevenUnitsGUI/PresenterTest.java
@@ -148,6 +148,7 @@ public final class PresenterTest {
 		presenter.database.clear();
 		presenter.database.addUnit("metre", metre);
 		presenter.database.addUnit("meter", meter);
+		presenter.setOneWayConversionEnabled(false);
 		
 		// test that only one of them is included if duplicate units disabled
 		presenter.setShowDuplicates(false);
@@ -265,6 +266,8 @@ public final class PresenterTest {
 		presenter.setOneWayConversionEnabled(true);
 		presenter.setShowDuplicates(true);
 		presenter.setNumberDisplayRule(StandardDisplayRules.fixedPrecision(11));
+		presenter.setPrefixRepetitionRule(
+				DefaultPrefixRepetitionRule.COMPLEX_REPETITION);
 		presenter.saveSettings(TEST_SETTINGS);
 		
 		// overwrite custom settings
@@ -323,6 +326,7 @@ public final class PresenterTest {
 		// setup
 		final ViewBot viewBot = new ViewBot();
 		final Presenter presenter = new Presenter(viewBot);
+		presenter.setOneWayConversionEnabled(false);
 		
 		// override default database units
 		presenter.database.clear();
diff --git a/src/test/resources/test-settings.txt b/src/test/resources/test-settings.txt
index 932221e..a0f494a 100644
--- a/src/test/resources/test-settings.txt
+++ b/src/test/resources/test-settings.txt
@@ -1,4 +1,4 @@
 number_display_rule=Round to 11 significant figures
-prefix_rule=NO_RESTRICTION
+prefix_rule=COMPLEX_REPETITION
 one_way=true
 include_duplicates=true