The unit and prefix viewers now use SearchBoxList.

5 files changed, 247 insertions, 285 deletions

diff --git a/src/org/unitConverter/UnitsDatabase.java b/src/org/unitConverter/UnitsDatabase.java
index 959c151..abe6546 100755
--- a/src/org/unitConverter/UnitsDatabase.java
+++ b/src/org/unitConverter/UnitsDatabase.java
@@ -134,6 +134,7 @@ public final class UnitsDatabase {
 				// the indices of the prefixes attached to the current unit
 				private final List<Integer> prefixCoordinates = new ArrayList<>();
 
+				// values from the unit entry set
 				private final Map<String, Unit> map;
 				private final List<String> unitNames;
 				private final List<String> prefixNames;
@@ -366,6 +367,7 @@ public final class UnitsDatabase {
 				// the indices of the prefixes attached to the current unit
 				private final List<Integer> prefixCoordinates = new ArrayList<>();
 
+				// values from the unit name set
 				private final Map<String, Unit> map;
 				private final List<String> unitNames;
 				private final List<String> prefixNames;
diff --git a/src/org/unitConverter/converterGUI/FilterComparator.java b/src/org/unitConverter/converterGUI/FilterComparator.java
index ad8d0b0..ef94602 100755
--- a/src/org/unitConverter/converterGUI/FilterComparator.java
+++ b/src/org/unitConverter/converterGUI/FilterComparator.java
@@ -41,6 +41,12 @@ public final class FilterComparator implements Comparator<String> {
 	 * @since v0.1.0

 	 */

 	private final Comparator<String> comparator;

+	/**

+	 * Whether or not the comparison is case-sensitive.

+	 * 

+	 * @since 2019-04-14

+	 */

+	private final boolean caseSensitive;

 

 	/**

 	 * Creates the {@code FilterComparator}.

@@ -60,38 +66,62 @@ public final class FilterComparator implements Comparator<String> {
 	 *            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

 	 */

-	public FilterComparator(final String filter, final Comparator<String> comparator) {

+	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) {

-		// this is case insensitive, so make them lowercase

-		final String arg0lower = arg0.toLowerCase();

-		final String arg1lower = arg1.toLowerCase();

+		// 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 (arg0lower.startsWith(this.filter) && !arg1lower.startsWith(this.filter))

+		if (str0.startsWith(this.filter) && !str1.startsWith(this.filter))

 			return -1;

-		else if (!arg0lower.startsWith(this.filter) && arg1lower.startsWith(this.filter))

+		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 (arg0lower.contains(this.filter) && !arg1lower.contains(this.filter))

+		if (str0.contains(this.filter) && !str1.contains(this.filter))

 			return -1;

-		else if (!arg0lower.contains(this.filter) && !arg1lower.contains(this.filter))

+		else if (!str0.contains(this.filter) && !str1.contains(this.filter))

 			return 1;

 

 		// other elements go last

 		if (this.comparator == null)

-			return arg0lower.compareTo(arg1lower);

+			return str0.compareTo(str1);

 		else

-			return this.comparator.compare(arg0lower, arg1lower);

+			return this.comparator.compare(str0, str1);

 	}

 }

diff --git a/src/org/unitConverter/converterGUI/SearchBoxList.java b/src/org/unitConverter/converterGUI/SearchBoxList.java
index 7d3b748..35cc347 100644
--- a/src/org/unitConverter/converterGUI/SearchBoxList.java
+++ b/src/org/unitConverter/converterGUI/SearchBoxList.java
@@ -22,6 +22,7 @@ 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;
@@ -61,16 +62,25 @@ final class SearchBoxList extends JPanel {
 	// event.
 	private boolean searchBoxFocused = false;
 
-	private Predicate<String> searchFilter = o -> true;
+	private Predicate<String> customSearchFilter = o -> true;
+	private final Comparator<String> defaultOrdering;
+	private final boolean caseSensitive;
+
+	public SearchBoxList(final Collection<String> itemsToFilter) {
+		this(itemsToFilter, null, false);
+	}
 
 	/**
 	 * Creates the {@code SearchBoxList}.
 	 * 
 	 * @since 2019-04-13
 	 */
-	public SearchBoxList(final Collection<String> itemsToFilter) {
+	public SearchBoxList(final Collection<String> itemsToFilter, final Comparator<String> defaultOrdering,
+			final boolean caseSensitive) {
 		super(new BorderLayout(), true);
 		this.itemsToFilter = itemsToFilter;
+		this.defaultOrdering = defaultOrdering;
+		this.caseSensitive = caseSensitive;
 
 		// create the components
 		this.listModel = new DelegateListModel<>(new ArrayList<>(itemsToFilter));
@@ -108,7 +118,7 @@ final class SearchBoxList extends JPanel {
 	 * @since 2019-04-13
 	 */
 	public void addSearchFilter(final Predicate<String> filter) {
-		this.searchFilter = this.searchFilter.and(filter);
+		this.customSearchFilter = this.customSearchFilter.and(filter);
 	}
 
 	/**
@@ -117,7 +127,44 @@ final class SearchBoxList extends JPanel {
 	 * @since 2019-04-13
 	 */
 	public void clearSearchFilters() {
-		this.searchFilter = o -> true;
+		this.customSearchFilter = o -> true;
+	}
+
+	/**
+	 * @return this component's search box component
+	 * @since 2019-04-14
+	 */
+	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
+	 */
+	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
+	 */
+	public final JList<String> getSearchList() {
+		return this.searchItems;
+	}
+
+	/**
+	 * @return index selected in item list
+	 * @since 2019-04-14
+	 */
+	public int getSelectedIndex() {
+		return this.searchItems.getSelectedIndex();
 	}
 
 	/**
@@ -135,17 +182,18 @@ final class SearchBoxList extends JPanel {
 	 */
 	public void reapplyFilter() {
 		final String searchText = this.searchBoxEmpty ? "" : this.searchBox.getText();
-		final FilterComparator comparator = new FilterComparator(searchText);
+		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 (string.toLowerCase().contains(searchText.toLowerCase())) {
+			if (searchFilter.test(string)) {
 				this.listModel.add(string);
 			}
 		});
 
 		// applies the custom filters
-		this.listModel.removeIf(this.searchFilter.negate());
+		this.listModel.removeIf(this.customSearchFilter.negate());
 
 		// sorts the remaining items
 		this.listModel.sort(comparator);
@@ -181,23 +229,32 @@ final class SearchBoxList extends JPanel {
 		}
 	}
 
+	/**
+	 * Runs whenever the text in the search box is changed.
+	 * <p>
+	 * Reapplies the search filter, and custom filters.
+	 * </p>
+	 * 
+	 * @since 2019-04-14
+	 */
 	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);
+		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 (string.toLowerCase().contains(searchText.toLowerCase())) {
+			if (searchFilter.test(string)) {
 				this.listModel.add(string);
 			}
 		});
 
 		// applies the custom filters
-		this.listModel.removeIf(this.searchFilter.negate());
+		this.listModel.removeIf(this.customSearchFilter.negate());
 
 		// sorts the remaining items
 		this.listModel.sort(comparator);
diff --git a/src/org/unitConverter/converterGUI/UnitConverterGUI.java b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
index 34cbef9..cacc3b7 100755
--- a/src/org/unitConverter/converterGUI/UnitConverterGUI.java
+++ b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
@@ -35,16 +35,12 @@ import javax.swing.JComboBox;
 import javax.swing.JFormattedTextField;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
-import javax.swing.JList;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
-import javax.swing.JScrollPane;
 import javax.swing.JSlider;
 import javax.swing.JTabbedPane;
 import javax.swing.JTextArea;
 import javax.swing.JTextField;
-import javax.swing.ListModel;
-import javax.swing.ListSelectionModel;
 
 import org.unitConverter.UnitsDatabase;
 import org.unitConverter.dimension.StandardDimensions;
@@ -95,20 +91,14 @@ final class UnitConverterGUI {
 		private final View view;
 
 		/** The units known by the program. */
-		private final UnitsDatabase units;
+		private final UnitsDatabase database;
 
 		/** The names of all of the units */
 		private final List<String> unitNames;
 
-		/** The names of all of the units, but filtered */
-		private final DelegateListModel<String> unitNamesFiltered;
-
 		/** The names of all of the prefixes */
 		private final List<String> prefixNames;
 
-		/** The names of all of the prefixes */
-		private final DelegateListModel<String> prefixNamesFiltered;
-
 		/** The names of all of the dimensions */
 		private final List<String> dimensionNames;
 
@@ -128,23 +118,23 @@ final class UnitConverterGUI {
 			this.view = view;
 
 			// load initial units
-			this.units = new UnitsDatabase();
-			Presenter.addDefaults(this.units);
+			this.database = new UnitsDatabase();
+			Presenter.addDefaults(this.database);
 
-			this.units.loadUnitsFile(new File("unitsfile.txt"));
-			this.units.loadDimensionFile(new File("dimensionfile.txt"));
+			this.database.loadUnitsFile(new File("unitsfile.txt"));
+			this.database.loadDimensionFile(new File("dimensionfile.txt"));
 
 			// 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.units.containsPrefixName(o1))
+				if (!Presenter.this.database.containsPrefixName(o1))
 					return -1;
-				else if (!Presenter.this.units.containsPrefixName(o2))
+				else if (!Presenter.this.database.containsPrefixName(o2))
 					return 1;
 
-				final UnitPrefix p1 = Presenter.this.units.getPrefix(o1);
-				final UnitPrefix p2 = Presenter.this.units.getPrefix(o2);
+				final UnitPrefix p1 = Presenter.this.database.getPrefix(o1);
+				final UnitPrefix p2 = Presenter.this.database.getPrefix(o2);
 
 				if (p1.getMultiplier() < p2.getMultiplier())
 					return -1;
@@ -154,19 +144,13 @@ final class UnitConverterGUI {
 				return o1.compareTo(o2);
 			};
 
-			this.unitNames = new ArrayList<>(this.units.unitMapPrefixless().keySet());
+			this.unitNames = new ArrayList<>(this.database.unitMapPrefixless().keySet());
 			this.unitNames.sort(null); // sorts it using Comparable
 
-			this.unitNamesFiltered = new DelegateListModel<>(new ArrayList<>(this.units.unitMapPrefixless().keySet()));
-			this.unitNamesFiltered.sort(null); // sorts it using Comparable
-
-			this.prefixNames = new ArrayList<>(this.units.prefixMap().keySet());
+			this.prefixNames = new ArrayList<>(this.database.prefixMap().keySet());
 			this.prefixNames.sort(this.prefixNameComparator); // sorts it using my comparator
 
-			this.prefixNamesFiltered = new DelegateListModel<>(new ArrayList<>(this.units.prefixMap().keySet()));
-			this.prefixNamesFiltered.sort(this.prefixNameComparator); // sorts it using my comparator
-
-			this.dimensionNames = new DelegateListModel<>(new ArrayList<>(this.units.dimensionMap().keySet()));
+			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
@@ -174,9 +158,43 @@ final class UnitConverterGUI {
 
 			// print out unit counts
 			System.out.printf("Successfully loaded %d units with %d unit names (%d base units).%n",
-					new HashSet<>(this.units.unitMapPrefixless().values()).size(),
-					this.units.unitMapPrefixless().size(),
-					new HashSet<>(this.units.unitMapPrefixless().values()).stream().filter(isFullBase).count());
+					new HashSet<>(this.database.unitMapPrefixless().values()).size(),
+					this.database.unitMapPrefixless().size(),
+					new HashSet<>(this.database.unitMapPrefixless().values()).stream().filter(isFullBase).count());
+		}
+
+		/**
+		 * Converts in the dimension-based converter
+		 * 
+		 * @since 2019-04-13
+		 */
+		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);
+
+			final String input = this.view.getDimensionConverterInput();
+			if (input.equals("")) {
+				this.view.showErrorDialog("Error", "No value to convert entered.");
+				return;
+			}
+			final double beforeValue = Double.parseDouble(input);
+			final double value = to.convertFromBase(from.convertToBase(beforeValue));
+
+			final String output = this.getRoundedString(value);
+
+			this.view.setDimensionConverterOutputText(
+					String.format("%s %s = %s %s", input, fromSelection, output, toSelection));
 		}
 
 		/**
@@ -190,7 +208,7 @@ final class UnitConverterGUI {
 		 * @since 2019-01-26
 		 * @since v0.1.0
 		 */
-		public final void convert() {
+		public final void convertExpressions() {
 			final String fromUnitString = this.view.getFromText();
 			final String toUnitString = this.view.getToText();
 
@@ -202,7 +220,7 @@ final class UnitConverterGUI {
 			// try to parse from
 			final Unit from;
 			try {
-				from = this.units.getUnitFromExpression(fromUnitString);
+				from = this.database.getUnitFromExpression(fromUnitString);
 			} catch (final IllegalArgumentException e) {
 				this.view.showErrorDialog("Parse Error", "Could not recognize text in From entry: " + e.getMessage());
 				return;
@@ -212,11 +230,11 @@ final class UnitConverterGUI {
 			// try to parse to
 			final Unit to;
 			try {
-				if (this.units.containsUnitName(toUnitString)) {
+				if (this.database.containsUnitName(toUnitString)) {
 					// if it's a unit, convert to that
-					to = this.units.getUnit(toUnitString);
+					to = this.database.getUnit(toUnitString);
 				} else {
-					to = this.units.getUnitFromExpression(toUnitString);
+					to = this.database.getUnitFromExpression(toUnitString);
 				}
 			} catch (final IllegalArgumentException e) {
 				this.view.showErrorDialog("Parse Error", "Could not recognize text in To entry: " + e.getMessage());
@@ -233,50 +251,35 @@ final class UnitConverterGUI {
 			value = to.convertFromBase(from.convertToBase(1));
 
 			// round value
-			final BigDecimal bigValue = new BigDecimal(value).round(new MathContext(this.significantFigures));
-			String output = bigValue.toString();
+			final String output = this.getRoundedString(value);
 
-			// 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);
-				}
-			}
-
-			this.view.setOutputText(String.format("%s = %s %s", fromUnitString, output, toUnitString));
+			this.view.setExpressionConverterOutputText(
+					String.format("%s = %s %s", fromUnitString, output, toUnitString));
 		}
 
 		/**
-		 * Converts in the dimension-based converter
-		 * 
+		 * @return a list of all of the unit dimensions
 		 * @since 2019-04-13
 		 */
-		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.units.getUnit(fromSelection);
-			final Unit to = this.units.getUnit(toSelection);
+		public final List<String> dimensionNameList() {
+			return this.dimensionNames;
+		}
 
-			final String input = this.view.getDimensionBasedInput();
-			if (input.equals("")) {
-				this.view.showErrorDialog("Error", "No value to convert entered.");
-				return;
-			}
-			final double beforeValue = Double.parseDouble(input);
-			final double value = to.convertFromBase(from.convertToBase(beforeValue));
+		/**
+		 * @return a comparator to compare prefix names
+		 * @since 2019-04-14
+		 */
+		public final Comparator<String> getPrefixNameComparator() {
+			return this.prefixNameComparator;
+		}
 
+		/**
+		 * @param value
+		 *            value to round
+		 * @return string of that value rounded to {@code significantDigits} significant digits.
+		 * @since 2019-04-14
+		 */
+		private final String getRoundedString(final double value) {
 			// round value
 			final BigDecimal bigValue = new BigDecimal(value).round(new MathContext(this.significantFigures));
 			String output = bigValue.toString();
@@ -291,86 +294,15 @@ final class UnitConverterGUI {
 				}
 			}
 
-			this.view.setDimensionBasedOutputText(
-					String.format("%s %s = %s %s", input, fromSelection, output, toSelection));
-		}
-
-		/**
-		 * @return a list of all of the unit dimensions
-		 * @since 2019-04-13
-		 */
-		public final List<String> dimensionNameList() {
-			return this.dimensionNames;
-		}
-
-		/**
-		 * Filters the filtered model for units
-		 * 
-		 * @param filter
-		 *            filter to use
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		private final void filterFilteredPrefixModel(final Predicate<String> filter) {
-			this.prefixNamesFiltered.clear();
-			for (final String prefixName : this.prefixNames) {
-				if (filter.test(prefixName)) {
-					this.prefixNamesFiltered.add(prefixName);
-				}
-			}
-		}
-
-		/**
-		 * Filters the filtered model for units
-		 * 
-		 * @param filter
-		 *            filter to use
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		private final void filterFilteredUnitModel(final Predicate<String> filter) {
-			this.unitNamesFiltered.clear();
-			for (final String unitName : this.unitNames) {
-				if (filter.test(unitName)) {
-					this.unitNamesFiltered.add(unitName);
-				}
-			}
+			return output;
 		}
 
 		/**
-		 * @return a list model of all of the unit keys
-		 * @since 2019-01-14
-		 * @since v0.1.0
-		 */
-		public final ListModel<String> keyListModel() {
-			return this.unitNamesFiltered;
-		}
-
-		/**
-		 * Runs whenever the prefix filter is changed.
-		 * <p>
-		 * Filters the prefix list then sorts it using a {@code FilterComparator}.
-		 * </p>
-		 * 
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public final void prefixFilterUpdated() {
-			final String filter = this.view.getPrefixFilterText();
-			if (filter.equals("")) {
-				this.filterFilteredPrefixModel(t -> true);
-			} else {
-				this.filterFilteredPrefixModel(t -> t.contains(filter));
-			}
-			this.prefixNamesFiltered.sort(new FilterComparator(filter));
-		}
-
-		/**
-		 * @return a list model of all of the prefix names
-		 * @since 2019-01-15
+		 * @return a set of all prefix names in the database
+		 * @since 2019-04-14
 		 */
-		public final ListModel<String> prefixNameListModel() {
-			return this.prefixNamesFiltered;
+		public final Set<String> prefixNameSet() {
+			return this.database.prefixMap().keySet();
 		}
 
 		/**
@@ -383,12 +315,11 @@ final class UnitConverterGUI {
 		 * @since v0.1.0
 		 */
 		public final void prefixSelected() {
-			final int index = this.view.getPrefixListSelection();
-			if (index == -1)
+			final String prefixName = this.view.getPrefixViewerSelection();
+			if (prefixName == null)
 				return;
 			else {
-				final String prefixName = this.prefixNamesFiltered.get(index);
-				final UnitPrefix prefix = this.units.getPrefix(prefixName);
+				final UnitPrefix prefix = this.database.getPrefix(prefixName);
 
 				this.view.setPrefixTextBoxText(String.format("%s%nMultiplier: %s", prefixName, prefix.getMultiplier()));
 			}
@@ -404,25 +335,6 @@ final class UnitConverterGUI {
 		}
 
 		/**
-		 * Runs whenever the unit filter is changed.
-		 * <p>
-		 * Filters the unit list then sorts it using a {@code FilterComparator}.
-		 * </p>
-		 * 
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public final void unitFilterUpdated() {
-			final String filter = this.view.getUnitFilterText();
-			if (filter.equals("")) {
-				this.filterFilteredUnitModel(t -> true);
-			} else {
-				this.filterFilteredUnitModel(t -> t.contains(filter));
-			}
-			this.unitNamesFiltered.sort(new FilterComparator(filter));
-		}
-
-		/**
 		 * Returns true if and only if the unit represented by {@code unitName} has the dimension represented by
 		 * {@code dimensionName}.
 		 * 
@@ -433,9 +345,9 @@ final class UnitConverterGUI {
 		 * @return whether unit has dimenision
 		 * @since 2019-04-13
 		 */
-		public boolean unitMatchesDimension(final String unitName, final String dimensionName) {
-			final Unit unit = this.units.getUnit(unitName);
-			final UnitDimension dimension = this.units.getDimension(dimensionName);
+		public final boolean unitMatchesDimension(final String unitName, final String dimensionName) {
+			final Unit unit = this.database.getUnit(unitName);
+			final UnitDimension dimension = this.database.getDimension(dimensionName);
 			return unit.getDimension().equals(dimension);
 		}
 
@@ -448,20 +360,23 @@ final class UnitConverterGUI {
 		 * @since 2019-01-15
 		 * @since v0.1.0
 		 */
-		public void unitNameSelected() {
-			final int index = this.view.getUnitListSelection();
-			if (index == -1)
+		public final void unitNameSelected() {
+			final String unitName = this.view.getUnitViewerSelection();
+			if (unitName == null)
 				return;
 			else {
-				final String unitName = this.unitNamesFiltered.get(index);
-				final Unit unit = this.units.getUnit(unitName);
+				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
+		 */
 		public final Set<String> unitNameSet() {
-			return this.units.unitMapPrefixless().keySet();
+			return this.database.unitMapPrefixless().keySet();
 		}
 	}
 
@@ -471,26 +386,17 @@ final class UnitConverterGUI {
 		/** The view's associated presenter. */
 		private final Presenter presenter;
 
-		/** The list of unit names in the unit viewer */
-		private final JList<String> unitNameList;
-		/** The list of prefix names in the prefix viewer */
-		private final JList<String> prefixNameList;
-		/** The unit search box in the unit viewer */
-		private final JTextField unitFilterEntry;
-		/** The text box for unit data in the unit viewer */
-		private final JTextArea unitTextBox;
-		/** The prefix search box in the prefix viewer */
-		private final JTextField prefixFilterEntry;
-		/** The text box for prefix data in the prefix viewer */
-		private final JTextArea prefixTextBox;
+		// 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 panel for inputting values in the dimension-based converter */
-		private final JTextField valueInput;
 		/** 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 */
@@ -498,6 +404,16 @@ final class UnitConverterGUI {
 		/** 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}.
 		 * 
@@ -510,11 +426,10 @@ final class UnitConverterGUI {
 			this.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 			// create the components
-			this.unitNameList = new JList<>(this.presenter.keyListModel());
-			this.prefixNameList = new JList<>(this.presenter.prefixNameListModel());
-			this.unitFilterEntry = new JTextField();
+			this.unitNameList = new SearchBoxList(this.presenter.unitNameSet());
+			this.prefixNameList = new SearchBoxList(this.presenter.prefixNameSet(),
+					this.presenter.getPrefixNameComparator(), true);
 			this.unitTextBox = new JTextArea();
-			this.prefixFilterEntry = new JTextField();
 			this.prefixTextBox = new JTextArea();
 			this.fromSearch = new SearchBoxList(this.presenter.unitNameSet());
 			this.toSearch = new SearchBoxList(this.presenter.unitNameSet());
@@ -534,7 +449,7 @@ final class UnitConverterGUI {
 		 * @return value in dimension-based converter
 		 * @since 2019-04-13
 		 */
-		public String getDimensionBasedInput() {
+		public String getDimensionConverterInput() {
 			return this.valueInput.getText();
 		}
 
@@ -556,21 +471,12 @@ final class UnitConverterGUI {
 		}
 
 		/**
-		 * @return text in prefix filter
+		 * @return index of selected prefix in prefix viewer
 		 * @since 2019-01-15
 		 * @since v0.1.0
 		 */
-		public String getPrefixFilterText() {
-			return this.prefixFilterEntry.getText();
-		}
-
-		/**
-		 * @return index of selected prefix
-		 * @since 2019-01-15
-		 * @since v0.1.0
-		 */
-		public int getPrefixListSelection() {
-			return this.prefixNameList.getSelectedIndex();
+		public String getPrefixViewerSelection() {
+			return this.prefixNameList.getSelectedValue();
 		}
 
 		/**
@@ -591,20 +497,12 @@ final class UnitConverterGUI {
 		}
 
 		/**
-		 * @return text in unit filter
-		 * @see javax.swing.text.JTextComponent#getText()
-		 */
-		public String getUnitFilterText() {
-			return this.unitFilterEntry.getText();
-		}
-
-		/**
-		 * @return index of selected unit
+		 * @return index of selected unit in unit viewer
 		 * @since 2019-01-15
 		 * @since v0.1.0
 		 */
-		public int getUnitListSelection() {
-			return this.unitNameList.getSelectedIndex();
+		public String getUnitViewerSelection() {
+			return this.unitNameList.getSelectedValue();
 		}
 
 		/**
@@ -764,7 +662,7 @@ final class UnitConverterGUI {
 						final JButton convertButton = new JButton("Convert!");
 						convertExpressionPanel.add(convertButton);
 
-						convertButton.addActionListener(e -> this.presenter.convert());
+						convertButton.addActionListener(e -> this.presenter.convertExpressions());
 					}
 
 					{ // output of conversion
@@ -808,24 +706,11 @@ final class UnitConverterGUI {
 
 					unitLookupPanel.setLayout(new GridLayout());
 
-					{ // panel for listing and searching
-						final JPanel listPanel = new JPanel();
-						unitLookupPanel.add(listPanel);
-
-						listPanel.setLayout(new BorderLayout());
+					{ // search panel
+						unitLookupPanel.add(this.unitNameList);
 
-						{ // unit search box
-							listPanel.add(this.unitFilterEntry, BorderLayout.PAGE_START);
-							this.unitFilterEntry.addCaretListener(e -> this.presenter.unitFilterUpdated());
-						}
-
-						{ // a list of units
-							listPanel.add(new JScrollPane(this.unitNameList), BorderLayout.CENTER);
-							this.unitNameList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); // temp
-							this.unitNameList.addListSelectionListener(e -> {
-								this.presenter.unitNameSelected();
-							});
-						}
+						this.unitNameList.getSearchList()
+								.addListSelectionListener(e -> this.presenter.unitNameSelected());
 					}
 
 					{ // the text box for unit's toString
@@ -842,23 +727,10 @@ final class UnitConverterGUI {
 					prefixLookupPanel.setLayout(new GridLayout(1, 2));
 
 					{ // panel for listing and seaching
-						final JPanel prefixListPanel = new JPanel();
-						prefixLookupPanel.add(prefixListPanel);
-
-						prefixListPanel.setLayout(new BorderLayout());
-
-						{ // prefix search box
-							prefixListPanel.add(this.prefixFilterEntry, BorderLayout.PAGE_START);
-							this.prefixFilterEntry.addCaretListener(e -> this.presenter.prefixFilterUpdated());
-						}
+						prefixLookupPanel.add(this.prefixNameList);
 
-						{ // a list of prefixes
-							prefixListPanel.add(new JScrollPane(this.prefixNameList), BorderLayout.CENTER);
-							this.prefixNameList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); // temp
-							this.prefixNameList.addListSelectionListener(e -> {
-								this.presenter.prefixSelected();
-							});
-						}
+						this.prefixNameList.getSearchList()
+								.addListSelectionListener(e -> this.presenter.prefixSelected());
 					}
 
 					{ // the text box for prefix's toString
@@ -876,7 +748,7 @@ final class UnitConverterGUI {
 		 *            text to set
 		 * @since 2019-04-13
 		 */
-		public void setDimensionBasedOutputText(final String text) {
+		public void setDimensionConverterOutputText(final String text) {
 			this.dimensionBasedOutput.setText(text);
 		}
 
@@ -888,12 +760,12 @@ final class UnitConverterGUI {
 		 * @since 2019-01-15
 		 * @since v0.1.0
 		 */
-		public void setOutputText(final String text) {
+		public void setExpressionConverterOutputText(final String text) {
 			this.output.setText(text);
 		}
 
 		/**
-		 * Sets the text of the prefix text box.
+		 * Sets the text of the prefix text box in the prefix viewer.
 		 * 
 		 * @param text
 		 *            text to set
@@ -905,14 +777,15 @@ final class UnitConverterGUI {
 		}
 
 		/**
-		 * Sets the text of the unit text box.
+		 * Sets the text of the unit text box in the unit viewer.
 		 * 
-		 * @param t
+		 * @param text
 		 *            text to set
-		 * @see javax.swing.text.JTextComponent#setText(java.lang.String)
+		 * @since 2019-01-15
+		 * @since v0.1.0
 		 */
-		public void setUnitTextBoxText(final String t) {
-			this.unitTextBox.setText(t);
+		public void setUnitTextBoxText(final String text) {
+			this.unitTextBox.setText(text);
 		}
 
 		/**
diff --git a/unitsfile.txt b/unitsfile.txt
index 553fd5e..bda9b81 100755
--- a/unitsfile.txt
+++ b/unitsfile.txt
@@ -138,7 +138,7 @@ radian					m / m
 rad						radian
 steradian				m^2 / m^2
 sr						steradian
-degree					360 / tau * radian
+degree					tau / 360 radian
 deg						degree
 °						degree