diff --git a/source/common.h b/source/common.h
index 1b66136..3c8a4e9 100644
--- a/source/common.h
+++ b/source/common.h
@@ -13,7 +13,7 @@
 #include <ios>
 #include <istream>
 #include <iterator>
-#include <memory>
+#include <optional>
 #include <stdexcept>
 #include <string>
 #include <utility>
diff --git a/source/quam/main_window.cc b/source/quam/main_window.cc
index 9597f38..23580c0 100644
--- a/source/quam/main_window.cc
+++ b/source/quam/main_window.cc
@@ -2,17 +2,30 @@
 #include "quam/main_window.h"
 #include "quam/pak.h"
 
+#include <QAbstractItemModel>
+#include <QErrorMessage>
+#include <QFileDialog>
+#include <QSortFilterProxyModel>
+
 MainWindow::MainWindow(QWidget *parent) :
 	QMainWindow{parent},
 	Ui::MainWindow{},
-	m_errors{}
+	m_directory{},
+	m_errors{new QErrorMessage{this}},
+	m_model{nullptr},
+	m_sorter{nullptr}
 {
 	setupUi(this);
 
+	actionClose->setShortcut(QKeySequence{QKeySequence::Close});
 	actionOpen->setShortcut(QKeySequence{QKeySequence::Open});
 	actionQuit->setShortcut(QKeySequence{QKeySequence::Quit});
 
-	tableWidget->sortByColumn(Pak::ColumnId, Qt::AscendingOrder);
+	tableView->sortByColumn(Pak::ColumnSize, Qt::AscendingOrder);
+	tableView->resizeColumnsToContents();
+}
+
+MainWindow::~MainWindow() {
 }
 
 void MainWindow::fileOpen() {
@@ -27,13 +40,23 @@ void MainWindow::fileOpen() {
 
 	if(!fileName.isEmpty()) {
 		try {
-			auto st  = openReadBin(fileName.toStdString());
-			auto pak = readPak(st);
-			setTableToPakDir(*tableWidget, pak);
+			auto st = openReadBin(fileName.toStdString());
+			m_directory = readPak(st);
+			m_model     = new PakDirModel{&m_directory, this};
+			m_sorter    = new PakDirModelSorter{m_model};
+			m_sorter->setSourceModel(m_model);
+			tableView->setModel(m_sorter);
 		} catch(std::exception const &exc) {
-			m_errors.showMessage(tr(exc.what()));
+			m_errors->showMessage(tr(exc.what()));
 		}
 	}
 }
 
+void MainWindow::fileClose() {
+	tableView->setModel(nullptr);
+	delete m_sorter;
+	delete m_model;
+	m_directory = PakDir{};
+}
+
 // EOF
diff --git a/source/quam/main_window.h b/source/quam/main_window.h
index 3f12e5a..7c435e2 100644
--- a/source/quam/main_window.h
+++ b/source/quam/main_window.h
@@ -1,23 +1,31 @@
 #pragma once
 
+#include "quam/pak.h"
 #include "quam/ui_main_window.h"
 
-#include <QErrorMessage>
-#include <QFileDialog>
 #include <QMainWindow>
 #include <QWidget>
 
+class QAbstractItemModel;
+class QErrorMessage;
+class QSortFilterProxyModel;
+
 class MainWindow : public QMainWindow, private Ui::MainWindow {
 	Q_OBJECT
 
 public:
 	explicit MainWindow(QWidget *parent = nullptr);
+	virtual ~MainWindow();
 
 public slots:
 	void fileOpen();
+	void fileClose();
 
 private:
-	QErrorMessage m_errors;
+	PakDir                 m_directory;
+	QErrorMessage         *m_errors;
+	QAbstractItemModel    *m_model;
+	QSortFilterProxyModel *m_sorter;
 };
 
 // EOF
diff --git a/source/quam/main_window.ui b/source/quam/main_window.ui
index f93548f..aeac4c7 100644
--- a/source/quam/main_window.ui
+++ b/source/quam/main_window.ui
@@ -11,80 +11,53 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Quam!</string>
+   <string>QuAM!</string>
   </property>
   <widget class="QWidget" name="centralwidget">
-   <layout class="QHBoxLayout" name="horizontalLayout_2">
+   <layout class="QHBoxLayout" name="horizontalLayout_4">
     <item>
-     <widget class="QTableWidget" name="tableWidget">
-      <property name="verticalScrollBarPolicy">
-       <enum>Qt::ScrollBarAlwaysOn</enum>
+     <widget class="QSplitter" name="splitter">
+      <property name="orientation">
+       <enum>Qt::Horizontal</enum>
       </property>
-      <property name="horizontalScrollBarPolicy">
-       <enum>Qt::ScrollBarAlwaysOff</enum>
-      </property>
-      <property name="autoScroll">
-       <bool>false</bool>
-      </property>
-      <property name="tabKeyNavigation">
-       <bool>true</bool>
-      </property>
-      <property name="alternatingRowColors">
-       <bool>true</bool>
-      </property>
-      <property name="selectionMode">
-       <enum>QAbstractItemView::SingleSelection</enum>
-      </property>
-      <property name="selectionBehavior">
-       <enum>QAbstractItemView::SelectRows</enum>
-      </property>
-      <property name="showGrid">
-       <bool>false</bool>
-      </property>
-      <property name="sortingEnabled">
-       <bool>true</bool>
-      </property>
-      <attribute name="horizontalHeaderVisible">
-       <bool>true</bool>
-      </attribute>
-      <attribute name="horizontalHeaderShowSortIndicator" stdset="0">
-       <bool>true</bool>
-      </attribute>
-      <attribute name="horizontalHeaderStretchLastSection">
-       <bool>true</bool>
-      </attribute>
-      <attribute name="verticalHeaderVisible">
-       <bool>false</bool>
-      </attribute>
-      <column>
-       <property name="text">
-        <string>ID</string>
+      <widget class="QTableView" name="tableView">
+       <property name="verticalScrollBarPolicy">
+        <enum>Qt::ScrollBarAlwaysOn</enum>
        </property>
-       <property name="toolTip">
-        <string>The ID of the file. This is the N-th file in the archive.</string>
+       <property name="horizontalScrollBarPolicy">
+        <enum>Qt::ScrollBarAlwaysOff</enum>
        </property>
-      </column>
-      <column>
-       <property name="text">
-        <string>Size</string>
+       <property name="autoScroll">
+        <bool>false</bool>
        </property>
-       <property name="toolTip">
-        <string>The size of the file in bytes.</string>
+       <property name="tabKeyNavigation">
+        <bool>true</bool>
        </property>
-      </column>
-      <column>
-       <property name="text">
-        <string>Name</string>
+       <property name="alternatingRowColors">
+        <bool>true</bool>
        </property>
-       <property name="toolTip">
-        <string>The name of the file.</string>
+       <property name="selectionMode">
+        <enum>QAbstractItemView::SingleSelection</enum>
        </property>
-      </column>
+       <property name="selectionBehavior">
+        <enum>QAbstractItemView::SelectRows</enum>
+       </property>
+       <property name="showGrid">
+        <bool>false</bool>
+       </property>
+       <property name="sortingEnabled">
+        <bool>true</bool>
+       </property>
+       <attribute name="horizontalHeaderVisible">
+        <bool>true</bool>
+       </attribute>
+       <attribute name="verticalHeaderVisible">
+        <bool>false</bool>
+       </attribute>
+      </widget>
+      <widget class="QPlainTextEdit" name="textEdit"/>
      </widget>
     </item>
-    <item>
-     <widget class="QPlainTextEdit" name="textEdit"/>
-    </item>
    </layout>
   </widget>
   <widget class="QMenuBar" name="menubar">
@@ -101,6 +74,7 @@
      <string>&amp;File</string>
     </property>
     <addaction name="actionOpen"/>
+    <addaction name="actionClose"/>
     <addaction name="separator"/>
     <addaction name="actionQuit"/>
    </widget>
@@ -109,7 +83,8 @@
   <widget class="QStatusBar" name="statusbar"/>
   <action name="actionOpen">
    <property name="icon">
-    <iconset theme="document-open"/>
+    <iconset theme="document-open">
+     <normaloff>.</normaloff>.</iconset>
    </property>
    <property name="text">
     <string>&amp;Open</string>
@@ -117,12 +92,21 @@
   </action>
   <action name="actionQuit">
    <property name="icon">
-    <iconset theme="application-exit"/>
+    <iconset theme="application-exit">
+     <normaloff>.</normaloff>.</iconset>
    </property>
    <property name="text">
     <string>&amp;Quit</string>
    </property>
   </action>
+  <action name="actionClose">
+   <property name="icon">
+    <iconset theme="document-close"/>
+   </property>
+   <property name="text">
+    <string>&amp;Close</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections>
@@ -158,8 +142,26 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>actionClose</sender>
+   <signal>triggered()</signal>
+   <receiver>MainWindow</receiver>
+   <slot>fileClose()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>-1</x>
+     <y>-1</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>319</x>
+     <y>239</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
  <slots>
   <slot>fileOpen()</slot>
+  <slot>selectCell(int,int)</slot>
+  <slot>fileClose()</slot>
  </slots>
 </ui>
diff --git a/source/quam/pak.cc b/source/quam/pak.cc
index 33c2c4a..7fca3db 100644
--- a/source/quam/pak.cc
+++ b/source/quam/pak.cc
@@ -1,6 +1,8 @@
 #include "common.h"
 #include "quam/pak.h"
 
+#include <QIcon>
+
 struct PakHeader {
 	quint32 dirOffset;
 	quint32 dirNum;
@@ -33,7 +35,7 @@ static PakHeader readPakHeader(std::istream &st) {
 	return hdr;
 }
 
-static PakEntry readPakEntry(std::istream &st, quint32 id) {
+static PakEntry readPakEntry(std::istream &st) {
 	auto entName   = readBytes<56>(st);
 	auto entOffset = readLE<quint32>(st);
 	auto entSize   = readLE<quint32>(st);
@@ -43,7 +45,6 @@ static PakEntry readPakEntry(std::istream &st, quint32 id) {
 	st.seekg(entOffset);
 
 	PakFile file;
-	file.id = id;
 	file.resize(entSize);
 	st.read(file.data(), entSize);
 
@@ -65,15 +66,29 @@ static PakEntry readPakEntry(std::istream &st, quint32 id) {
 }
 
 void insertFile(PakDir &dir, std::string name, PakFile file) {
+	std::optional<std::string> next;
+
 	if(auto slash = name.find('/'); slash != std::string::npos) {
-		auto folder = name.substr(0, slash);
-		auto next   = name.substr(slash + 1);
-		dir[folder] = PakNode{PakDir{}};
-		insertFile(std::get<PakDir>(dir[folder]),
-		           std::move(next),
-		           std::move(file));
+		next = name.substr(slash + 1);
+		name = name.substr(0, slash);
+	}
+
+	auto existingNode = std::find_if(dir.begin(), dir.end(),
+		[&name](PakNode const &node) {
+			return node.name == name;
+		});
+
+	if(next) {
+		auto ref =
+			existingNode != dir.end()
+				? *existingNode
+				: dir.emplace_back(PakDir{}, std::move(name));
+		insertFile(std::get<PakDir>(ref), *std::move(next), std::move(file));
 	} else {
-		dir[name] = PakNode{std::move(file)};
+		if(existingNode != dir.end()) {
+			throw std::runtime_error("duplicate file");
+		}
+		dir.emplace_back(std::move(file), std::move(name));
 	}
 }
 
@@ -83,57 +98,103 @@ PakDir readPak(std::istream &st) {
 
 	PakDir root;
 
-	for(quint32 id = 0; id < hdr.dirNum; id++) {
-		auto ent = readPakEntry(st, id);
+	for(quint32 i = 0; i < hdr.dirNum; i++) {
+		auto ent = readPakEntry(st);
 		insertFile(root, std::move(ent.name), std::move(ent.file));
 	}
 
 	return root;
 }
 
-void setTableToPakDir(QTableWidget &table, PakDir const &dir) {
-	constexpr auto Flags = Qt::ItemIsSelectable |
-	                       Qt::ItemIsDragEnabled |
-	                       Qt::ItemIsEnabled |
-	                       Qt::ItemNeverHasChildren;
+PakDirModel::PakDirModel(PakDir const *root, QObject *parent) :
+	QAbstractItemModel{parent},
+	m_root{root}
+{
+}
 
-	auto sorted = table.isSortingEnabled();
-	table.clearContents();
-	table.setSortingEnabled(false);
-	quint32 row{0};
-	for(auto const &kv : dir) {
-		auto const &name = kv.first;
-		auto const &node = kv.second;
-		table.setRowCount(row + 1);
-		{
-			auto item = new QTableWidgetItem;
-			item->setFlags(Flags);
-			if(auto file = std::get_if<PakFile>(&node)) {
-				item->setText(QString::number(file->id));
-			}
-			table.setItem(row, Pak::ColumnId, item);
-		}
-		{
-			auto item = new QTableWidgetItem;
-			item->setFlags(Flags);
-			if(auto file = std::get_if<PakFile>(&node)) {
-				item->setText(QString::number(file->size()));
-			}
-			table.setItem(row, Pak::ColumnSize, item);
-		}
-		{
-			auto item = new QTableWidgetItem;
-			auto icon = std::holds_alternative<PakDir>(node) ? "folder" :
-			                                                   "text-x-generic";
-			item->setFlags(Flags);
-			item->setText(QString::fromStdString(name));
-			item->setIcon(QIcon::fromTheme(icon));
-			table.setItem(row, Pak::ColumnName, item);
-		}
-		++row;
+PakDirModel::~PakDirModel() {
+}
+
+QVariant PakDirModel::data(QModelIndex const &index, int role) const {
+	if(!index.isValid()) {
+		return QVariant{};
 	}
-	table.setSortingEnabled(sorted);
-	table.resizeColumnsToContents();
+
+	auto node = static_cast<PakNode *>(index.internalPointer());
+
+	switch(role) {
+		case Qt::DecorationRole:
+			if(index.column() == Pak::ColumnName) {
+				auto icon =
+					std::holds_alternative<PakDir>(*node) ? "folder"
+					                                      : "text-x-generic";
+				return QVariant{QIcon::fromTheme(icon)};
+			}
+			break;
+		case Qt::DisplayRole:
+			switch(index.column()) {
+				case Pak::ColumnSize:
+					if(auto file = std::get_if<PakFile>(node)) {
+						return QVariant{QString::number(file->size())};
+					}
+					break;
+				case Pak::ColumnName:
+					return QVariant{tr(node->name.data())};
+			}
+		default:
+			break;
+	}
+	return QVariant{};
+}
+
+Qt::ItemFlags PakDirModel::flags(QModelIndex const &index) const {
+	if(!index.isValid()) {
+		return Qt::NoItemFlags;
+	} else {
+		return Qt::ItemIsSelectable  |
+		       Qt::ItemIsDragEnabled |
+		       Qt::ItemIsEnabled     |
+		       Qt::ItemNeverHasChildren;
+	}
+}
+
+QVariant PakDirModel::headerData(int section,
+                                Qt::Orientation orientation,
+                                int role) const {
+	if(orientation == Qt::Horizontal && role == Qt::DisplayRole) {
+		switch(section) {
+			case Pak::ColumnSize: return QVariant{tr("Size")};
+			case Pak::ColumnName: return QVariant{tr("Name")};
+		}
+	}
+	return QVariant{};
+}
+
+QModelIndex PakDirModel::index(int row,
+                               int col,
+                               QModelIndex const &parent) const {
+	if(!hasIndex(row, col, parent) || row > m_root->size()) {
+		return QModelIndex{};
+	} else {
+		// despite index data being const, this function does not take a const
+		// pointer, which is very annoying!
+		return createIndex(row, col, const_cast<PakNode *>(&m_root->at(row)));
+	}
+}
+
+QModelIndex PakDirModel::parent(QModelIndex const &) const {
+	return QModelIndex{};
+}
+
+int PakDirModel::rowCount(QModelIndex const &) const {
+	return m_root->size();
+}
+
+int PakDirModel::columnCount(QModelIndex const &) const {
+	return Pak::ColumnMax;
+}
+
+PakDirModelSorter::~PakDirModelSorter() {
 }
 
 // EOF
diff --git a/source/quam/pak.h b/source/quam/pak.h
index 093b45b..2ec9693 100644
--- a/source/quam/pak.h
+++ b/source/quam/pak.h
@@ -1,35 +1,73 @@
 #pragma once
 
-#include <QTableWidget>
+#include <QAbstractItemModel>
+#include <QSortFilterProxyModel>
 
 namespace Pak {
 	enum PakColumn {
-		ColumnId,
 		ColumnSize,
 		ColumnName,
+		ColumnMax,
 	};
 }
 
 struct PakNode;
 
-struct PakDir : public std::map<std::string, PakNode> {
-	using std::map<std::string, PakNode>::map;
+struct PakDir : public std::vector<PakNode> {
+	using std::vector<PakNode>::vector;
 };
 Q_DECLARE_METATYPE(PakDir)
 
 struct PakFile : public QByteArray {
 	using QByteArray::QByteArray;
-
-	quint32 id{0};
 };
 Q_DECLARE_METATYPE(PakFile)
 
 struct PakNode : public std::variant<PakDir, PakFile> {
-	using std::variant<PakDir, PakFile>::variant;
+	PakNode() = default;
+
+	template<typename T>
+	constexpr PakNode(T &&t, std::string &&n) :
+		variant(std::move(t)),
+		name(std::move(n)) {
+	}
+
+	PakNode(PakNode const &) = default;
+	PakNode(PakNode &&) = default;
+
+	std::string name;
 };
 Q_DECLARE_METATYPE(PakNode)
 
+class PakDirModel : public QAbstractItemModel {
+	Q_OBJECT
+
+public:
+	explicit PakDirModel(PakDir const *root, QObject *parent);
+	virtual ~PakDirModel();
+
+	QVariant data(QModelIndex const &index, int role) const override;
+	Qt::ItemFlags flags(QModelIndex const &index) const override;
+	QVariant headerData(int section, Qt::Orientation orientation, int role)
+		const override;
+	QModelIndex index(int row, int col, QModelIndex const &parent)
+		const override;
+	QModelIndex parent(QModelIndex const &index) const override;
+	int rowCount(QModelIndex const &parent) const override;
+	int columnCount(QModelIndex const &parent) const override;
+
+private:
+	PakDir const *const m_root;
+};
+
+class PakDirModelSorter : public QSortFilterProxyModel {
+	Q_OBJECT
+
+public:
+	using QSortFilterProxyModel::QSortFilterProxyModel;
+	virtual ~PakDirModelSorter();
+};
+
 PakDir readPak(std::istream &st);
-void setTableToPakDir(QTableWidget &table, PakDir const &dir);
 
 // EOF