Qt: New library system (#549)

CHANGES

@@ -17,6 +17,7 @@ Features:
  - GB: Video/audio channel enabling/disabling
  - Add option to lock video to integer scaling
  - Video log recording for testing and bug reporting
+ - Library view
 Bugfixes:
  - LR35902: Fix core never exiting with certain event patterns
  - GB Timer: Improve DIV reset behavior

src/platform/qt/ArchiveInspector.cpp

@@ -13,11 +13,12 @@ ArchiveInspector::ArchiveInspector(const QString& filename, QWidget* parent)
 	: QDialog(parent)
 {
 	m_ui.setupUi(this);
-	connect(m_ui.archiveView, &LibraryView::doneLoading, [this]() {
+	connect(m_ui.archiveView, &LibraryController::doneLoading, [this]() {
 		m_ui.loading->hide();
 	});
-	connect(m_ui.archiveView, SIGNAL(accepted()), this, SIGNAL(accepted()));
+	connect(m_ui.archiveView, &LibraryController::startGame, this, &ArchiveInspector::accepted);
-	m_ui.archiveView->setDirectory(filename);
+	m_ui.archiveView->setViewStyle(LibraryStyle::STYLE_LIST);
+	m_ui.archiveView->addDirectory(filename);
 }
 
 VFile* ArchiveInspector::selectedVFile() const {

src/platform/qt/ArchiveInspector.ui

@@ -29,15 +29,15 @@
     </widget>
    </item>
    <item row="0" column="0" colspan="2">
-    <widget class="QGBA::LibraryView" name="archiveView" native="true"/>
+    <widget class="QGBA::LibraryController" name="archiveView" native="true"/>
    </item>
   </layout>
  </widget>
  <customwidgets>
   <customwidget>
-   <class>QGBA::LibraryView</class>
+   <class>QGBA::LibraryController</class>
    <extends>QWidget</extends>
-   <header>LibraryView.h</header>
+   <header>library/LibraryController.h</header>
    <container>1</container>
   </customwidget>
  </customwidgets>

src/platform/qt/CMakeLists.txt

@@ -105,6 +105,7 @@ set(SOURCE_FILES
 	Swatch.cpp
 	TilePainter.cpp
 	TileView.cpp
+	utils.cpp
 	Window.cpp
 	VFileDevice.cpp
 	VideoView.cpp)
@@ -117,7 +118,6 @@ set(UI_FILES
 	DebuggerConsole.ui
 	GIFView.ui
 	IOViewer.ui
-	LibraryView.ui
 	LoadSaveState.ui
 	LogView.ui
 	MemoryView.ui
@@ -138,8 +138,6 @@ set(GBA_SRC
 set(GB_SRC
 	GBOverride.cpp)
 
-qt5_wrap_ui(UI_SRC ${UI_FILES})
-
 set(QT_LIBRARIES)
 set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS},libqt5widgets5,libqt5opengl5")
 
@@ -189,8 +187,9 @@ endif()
 if(USE_SQLITE3)
 	list(APPEND SOURCE_FILES
 		ArchiveInspector.cpp
-		LibraryModel.cpp
+		library/LibraryController.cpp
-		LibraryView.cpp)
+		library/LibraryGrid.cpp
+		library/LibraryTree.cpp)
 endif()
 
 qt5_add_resources(RESOURCES resources.qrc)
@@ -239,6 +238,8 @@ if(Qt5LinguistTools_FOUND)
 	list(APPEND RESOURCES ${TRANSLATION_RESOURCES})
 endif()
 
+qt5_wrap_ui(UI_SRC ${UI_FILES})
+
 add_executable(${BINARY_NAME}-qt WIN32 MACOSX_BUNDLE main.cpp ${CMAKE_SOURCE_DIR}/res/mgba.icns ${SOURCE_FILES} ${PLATFORM_SRC} ${UI_SRC} ${AUDIO_SRC} ${RESOURCES})
 set_target_properties(${BINARY_NAME}-qt PROPERTIES MACOSX_BUNDLE_INFO_PLIST ${CMAKE_SOURCE_DIR}/res/info.plist.in COMPILE_DEFINITIONS "${FEATURE_DEFINES};${FUNCTION_DEFINES};${OS_DEFINES};${QT_DEFINES}")
 

src/platform/qt/LibraryModel.cpp

@@ -1,320 +0,0 @@
-/* Copyright (c) 2013-2016 Jeffrey Pfau
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-#include "LibraryModel.h"
-
-#include <QFontMetrics>
-
-#include <mgba-util/vfs.h>
-
-using namespace QGBA;
-
-Q_DECLARE_METATYPE(mLibraryEntry);
-
-QMap<QString, LibraryModel::LibraryHandle*> LibraryModel::s_handles;
-QMap<QString, LibraryModel::LibraryColumn> LibraryModel::s_columns;
-
-LibraryModel::LibraryModel(const QString& path, QObject* parent)
-	: QAbstractItemModel(parent)
-{
-	if (s_columns.empty()) {
-		s_columns["name"] = {
-			tr("Name"),
-			[](const mLibraryEntry& e) -> QString {
-				if (e.title) {
-					return QString::fromUtf8(e.title);
-				}
-				return QString::fromUtf8(e.filename);
-			}
-		};
-		s_columns["filename"] = {
-			tr("Filename"),
-			[](const mLibraryEntry& e) -> QString {
-				return QString::fromUtf8(e.filename);
-			}
-		};
-		s_columns["size"] = {
-			tr("Size"),
-			[](const mLibraryEntry& e) -> QString {
-				double size = e.filesize;
-				QString unit = "B";
-				if (size >= 1024.0) {
-					size /= 1024.0;
-					unit = "kiB";
-				}
-				if (size >= 1024.0) {
-					size /= 1024.0;
-					unit = "MiB";
-				}
-				return QString("%0 %1").arg(size, 0, 'f', 1).arg(unit);
-			},
-			Qt::AlignRight
-		};
-		s_columns["platform"] = {
-			tr("Platform"),
-			[](const mLibraryEntry& e) -> QString {
-				int platform = e.platform;
-				switch (platform) {
-#ifdef M_CORE_GBA
-				case PLATFORM_GBA:
-					return tr("GBA");
-#endif
-#ifdef M_CORE_GB
-				case PLATFORM_GB:
-					return tr("GB");
-#endif
-				default:
-					return tr("?");
-				}
-			}
-		};
-		s_columns["location"] = {
-			tr("Location"),
-			[](const mLibraryEntry& e) -> QString {
-				return QString::fromUtf8(e.base);
-			}
-		};
-		s_columns["crc32"] = {
-			tr("CRC32"),
-			[](const mLibraryEntry& e) -> QString {
-				return QString("%0").arg(e.crc32, 8, 16, QChar('0'));
-			}
-		};
-	}
-	if (!path.isNull()) {
-		if (s_handles.contains(path)) {
-			m_library = s_handles[path];
-			m_library->ref();
-		} else {
-			m_library = new LibraryHandle(mLibraryLoad(path.toUtf8().constData()), path);
-			if (m_library->library) {
-				s_handles[path] = m_library;
-			} else {
-				delete m_library;
-				m_library = new LibraryHandle(mLibraryCreateEmpty());
-			}
-		}
-	} else {
-		m_library = new LibraryHandle(mLibraryCreateEmpty());
-	}
-	mLibraryListingInit(&m_listings, 0);
-	memset(&m_constraints, 0, sizeof(m_constraints));
-	m_constraints.platform = PLATFORM_NONE;
-	m_columns.append(s_columns["name"]);
-	m_columns.append(s_columns["location"]);
-	m_columns.append(s_columns["platform"]);
-	m_columns.append(s_columns["size"]);
-	m_columns.append(s_columns["crc32"]);
-
-	connect(m_library->loader, SIGNAL(directoryLoaded(const QString&)), this, SLOT(directoryLoaded(const QString&)));
-}
-
-LibraryModel::~LibraryModel() {
-	clearConstraints();
-	mLibraryListingDeinit(&m_listings);
-	if (!m_library->deref()) {
-		s_handles.remove(m_library->path);
-		delete m_library;
-	}
-}
-
-void LibraryModel::loadDirectory(const QString& path) {
-	m_queue.append(path);
-	QMetaObject::invokeMethod(m_library->loader, "loadDirectory", Q_ARG(const QString&, path));
-}
-
-bool LibraryModel::entryAt(int row, mLibraryEntry* out) const {
-	if (mLibraryListingSize(&m_listings) <= row) {
-		return false;
-	}
-	*out = *mLibraryListingGetConstPointer(&m_listings, row);
-	return true;
-}
-
-VFile* LibraryModel::openVFile(const QModelIndex& index) const {
-	mLibraryEntry entry;
-	if (!entryAt(index.row(), &entry)) {
-		return nullptr;
-	}
-	return mLibraryOpenVFile(m_library->library, &entry);
-}
-
-QString LibraryModel::filename(const QModelIndex& index) const {
-	mLibraryEntry entry;
-	if (!entryAt(index.row(), &entry)) {
-		return QString();
-	}
-	return QString::fromUtf8(entry.filename);
-}
-
-QString LibraryModel::location(const QModelIndex& index) const {
-	mLibraryEntry entry;
-	if (!entryAt(index.row(), &entry)) {
-		return QString();
-	}
-	return QString::fromUtf8(entry.base);
-}
-
-QVariant LibraryModel::data(const QModelIndex& index, int role) const {
-	if (!index.isValid()) {
-		return QVariant();
-	}
-	mLibraryEntry entry;
-	if (!entryAt(index.row(), &entry)) {
-		return QVariant();
-	}
-	if (role == Qt::UserRole) {
-		return QVariant::fromValue(entry);
-	}
-	if (index.column() >= m_columns.count()) {
-		return QVariant();
-	}
-	switch (role) {
-	case Qt::DisplayRole:
-		return m_columns[index.column()].value(entry);
-	case Qt::SizeHintRole: {
-		QFontMetrics fm((QFont()));
-		return fm.size(Qt::TextSingleLine, m_columns[index.column()].value(entry));
-	}
-	case Qt::TextAlignmentRole:
-		return m_columns[index.column()].alignment;
-	default:
-		return QVariant();
-	}
-}
-
-QVariant LibraryModel::headerData(int section, Qt::Orientation orientation, int role) const {
-	if (role != Qt::DisplayRole) {
-		return QAbstractItemModel::headerData(section, orientation, role);
-	}
-	if (orientation == Qt::Horizontal) {
-		if (section >= m_columns.count()) {
-			return QVariant();
-		}
-		return m_columns[section].name;
-	}
-	return section;
-}
-
-QModelIndex LibraryModel::index(int row, int column, const QModelIndex& parent) const {
-	if (parent.isValid()) {
-		return QModelIndex();
-	}
-	return createIndex(row, column, nullptr);
-}
-
-QModelIndex LibraryModel::parent(const QModelIndex&) const {
-	return QModelIndex();
-}
-
-int LibraryModel::columnCount(const QModelIndex& parent) const {
-	if (parent.isValid()) {
-		return 0;
-	}
-	return m_columns.count();
-}
-
-int LibraryModel::rowCount(const QModelIndex& parent) const {
-	if (parent.isValid()) {
-		return 0;
-	}
-	return mLibraryCount(m_library->library, &m_constraints);
-}
-
-void LibraryModel::attachGameDB(const NoIntroDB* gameDB) {
-	mLibraryAttachGameDB(m_library->library, gameDB);
-}
-
-void LibraryModel::constrainBase(const QString& path) {
-	clearConstraints();
-	if (m_constraints.base) {
-		free(const_cast<char*>(m_constraints.base));
-	}
-	m_constraints.base = strdup(path.toUtf8().constData());
-	reload();
-}
-
-void LibraryModel::clearConstraints() {
-	if (m_constraints.base) {
-		free(const_cast<char*>(m_constraints.base));
-	}
-	if (m_constraints.filename) {
-		free(const_cast<char*>(m_constraints.filename));
-	}
-	if (m_constraints.title) {
-		free(const_cast<char*>(m_constraints.title));
-	}
-	memset(&m_constraints, 0, sizeof(m_constraints));
-	size_t i;
-	for (i = 0; i < mLibraryListingSize(&m_listings); ++i) {
-		mLibraryEntryFree(mLibraryListingGetPointer(&m_listings, i));
-	}
-	mLibraryListingClear(&m_listings);
-}
-
-void LibraryModel::reload() {
-	mLibraryGetEntries(m_library->library, &m_listings, 0, 0, m_constraints.base ? &m_constraints : nullptr);
-}
-
-void LibraryModel::directoryLoaded(const QString& path) {
-	m_queue.removeOne(path);
-	beginResetModel();
-	endResetModel();
-	if (m_queue.empty()) {
-		emit doneLoading();
-	}
-}
-
-LibraryModel::LibraryColumn::LibraryColumn() {
-}
-
-LibraryModel::LibraryColumn::LibraryColumn(const QString& name, std::function<QString(const mLibraryEntry&)> value, int alignment)
-	: name(name)
-	, value(value)
-	, alignment(alignment)
-{
-}
-
-LibraryModel::LibraryHandle::LibraryHandle(mLibrary* lib, const QString& p)
-	: library(lib)
-	, loader(new LibraryLoader(library))
-	, path(p)
-	, m_ref(1)
-{
-	if (!library) {
-		return;
-	}
-	loader->moveToThread(&m_loaderThread);
-	m_loaderThread.setObjectName("Library Loader Thread");
-	m_loaderThread.start();
-}
-
-LibraryModel::LibraryHandle::~LibraryHandle() {
-	m_loaderThread.quit();
-	m_loaderThread.wait();
-	if (library) {
-		mLibraryDestroy(library);
-	}
-}
-
-void LibraryModel::LibraryHandle::ref() {
-	++m_ref;
-}
-
-bool LibraryModel::LibraryHandle::deref() {
-	--m_ref;
-	return m_ref > 0;
-}
-
-LibraryLoader::LibraryLoader(mLibrary* library, QObject* parent)
-	: QObject(parent)
-	, m_library(library)
-{
-}
-
-void LibraryLoader::loadDirectory(const QString& path) {
-	mLibraryLoadDirectory(m_library, path.toUtf8().constData());
-	emit directoryLoaded(path);
-}

src/platform/qt/LibraryModel.h

@@ -1,115 +0,0 @@
-/* Copyright (c) 2013-2016 Jeffrey Pfau
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-#ifndef QGBA_LIBRARY_MODEL
-#define QGBA_LIBRARY_MODEL
-
-#include <QAbstractItemModel>
-#include <QStringList>
-#include <QThread>
-
-#include <mgba/core/library.h>
-
-#include <functional>
-
-struct VDir;
-struct VFile;
-struct NoIntroDB;
-
-namespace QGBA {
-
-class LibraryLoader;
-class LibraryModel : public QAbstractItemModel {
-Q_OBJECT
-
-public:
-	LibraryModel(const QString& path, QObject* parent = nullptr);
-	virtual ~LibraryModel();
-
-	bool entryAt(int row, mLibraryEntry* out) const;
-	VFile* openVFile(const QModelIndex& index) const;
-	QString filename(const QModelIndex& index) const;
-	QString location(const QModelIndex& index) const;
-
-	virtual QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
-	virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
-
-	virtual QModelIndex index(int row, int column, const QModelIndex& parent) const override;
-	virtual QModelIndex parent(const QModelIndex& index) const override;
-
-	virtual int columnCount(const QModelIndex& parent = QModelIndex()) const override;
-	virtual int rowCount(const QModelIndex& parent = QModelIndex()) const override;
-
-	void attachGameDB(const NoIntroDB* gameDB);
-
-signals:
-	void doneLoading();
-
-public slots:
-	void loadDirectory(const QString& path);
-
-	void constrainBase(const QString& path);
-	void clearConstraints();
-	void reload();
-
-private slots:
-	void directoryLoaded(const QString& path);
-
-private:
-	struct LibraryColumn {
-		LibraryColumn();
-		LibraryColumn(const QString&, std::function<QString(const mLibraryEntry&)>, int = Qt::AlignLeft);
-		QString name;
-		std::function<QString(const mLibraryEntry&)> value;
-		int alignment;
-	};
-
-	class LibraryHandle {
-	public:
-		LibraryHandle(mLibrary*, const QString& path = QString());
-		~LibraryHandle();
-
-		mLibrary* const library;
-		LibraryLoader* const loader;
-		const QString path;
-
-		void ref();
-		bool deref();
-
-	private:
-		QThread m_loaderThread;
-		size_t m_ref;
-	};
-
-	LibraryHandle* m_library;
-	static QMap<QString, LibraryHandle*> s_handles;
-
-	mLibraryEntry m_constraints;
-	mLibraryListing m_listings;
-	QStringList m_queue;
-
-	QList<LibraryColumn> m_columns;
-	static QMap<QString, LibraryColumn> s_columns;
-};
-
-class LibraryLoader : public QObject {
-Q_OBJECT
-
-public:
-	LibraryLoader(mLibrary* library, QObject* parent = nullptr);
-
-public slots:
-	void loadDirectory(const QString& path);
-
-signals:
-	void directoryLoaded(const QString& path);
-
-private:
-	mLibrary* m_library;
-};
-
-}
-
-#endif

src/platform/qt/LibraryView.cpp

@@ -1,58 +0,0 @@
-/* Copyright (c) 2013-2017 Jeffrey Pfau
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-#include "LibraryView.h"
-
-#include <mgba-util/vfs.h>
-
-#include "ConfigController.h"
-#include "GBAApp.h"
-
-using namespace QGBA;
-
-LibraryView::LibraryView(QWidget* parent)
-	: QWidget(parent)
-	, m_model(ConfigController::configDir() + "/library.sqlite3")
-{
-	m_ui.setupUi(this);
-	m_model.attachGameDB(GBAApp::app()->gameDB());
-	connect(&m_model, SIGNAL(doneLoading()), this, SIGNAL(doneLoading()));
-	connect(&m_model, SIGNAL(doneLoading()), this, SLOT(resizeColumns()));
-	connect(m_ui.listing, SIGNAL(activated(const QModelIndex&)), this, SIGNAL(accepted()));
-	m_ui.listing->horizontalHeader()->setSectionsMovable(true);
-	m_ui.listing->setModel(&m_model);
-	m_ui.listing->verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
-	m_model.reload();
-	resizeColumns();
-}
-
-void LibraryView::setDirectory(const QString& filename) {
-	m_model.loadDirectory(filename);
-	m_model.constrainBase(filename);
-}
-
-void LibraryView::addDirectory(const QString& filename) {
-	m_model.loadDirectory(filename);
-}
-
-VFile* LibraryView::selectedVFile() const {
-	QModelIndex index = m_ui.listing->selectionModel()->currentIndex();
-	if (!index.isValid()) {
-		return nullptr;
-	}
-	return m_model.openVFile(index);
-}
-
-QPair<QString, QString> LibraryView::selectedPath() const {
-	QModelIndex index = m_ui.listing->selectionModel()->currentIndex();
-	if (!index.isValid()) {
-		return qMakePair(QString(), QString());
-	}
-	return qMakePair(m_model.filename(index), m_model.location(index));
-}
-
-void  LibraryView::resizeColumns() {
-	m_ui.listing->horizontalHeader()->resizeSections(QHeaderView::ResizeToContents);
-}

src/platform/qt/LibraryView.h

@@ -1,45 +0,0 @@
-/* Copyright (c) 2013-2017 Jeffrey Pfau
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-#ifndef QGBA_LIBRARY_VIEW
-#define QGBA_LIBRARY_VIEW
-
-#include "LibraryModel.h"
-
-#include "ui_LibraryView.h"
-
-struct VFile;
-
-namespace QGBA {
-
-class LibraryView : public QWidget {
-Q_OBJECT
-
-public:
-	LibraryView(QWidget* parent = nullptr);
-
-	VFile* selectedVFile() const;
-	QPair<QString, QString> selectedPath() const;
-
-signals:
-	void doneLoading();
-	void accepted();
-
-public slots:
-	void setDirectory(const QString&);
-	void addDirectory(const QString&);
-
-private slots:
-	void resizeColumns();
-
-private:
-	Ui::LibraryView m_ui;
-
-	LibraryModel m_model;
-};
-
-}
-
-#endif

src/platform/qt/LibraryView.ui

@@ -1,49 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ui version="4.0">
- <class>LibraryView</class>
- <widget class="QWidget" name="LibraryView">
-  <property name="geometry">
-   <rect>
-    <x>0</x>
-    <y>0</y>
-    <width>400</width>
-    <height>300</height>
-   </rect>
-  </property>
-  <property name="windowTitle">
-   <string>Library</string>
-  </property>
-  <layout class="QGridLayout">
-   <property name="margin">
-    <number>0</number>
-   </property>
-   <item row="0" column="0">
-    <widget class="QTableView" name="listing">
-     <property name="editTriggers">
-      <set>QAbstractItemView::NoEditTriggers</set>
-     </property>
-     <property name="alternatingRowColors">
-      <bool>true</bool>
-     </property>
-     <property name="selectionBehavior">
-      <enum>QAbstractItemView::SelectRows</enum>
-     </property>
-     <property name="showGrid">
-      <bool>false</bool>
-     </property>
-     <attribute name="horizontalHeaderStretchLastSection">
-      <bool>true</bool>
-     </attribute>
-     <attribute name="verticalHeaderVisible">
-      <bool>false</bool>
-     </attribute>
-     <attribute name="verticalHeaderMinimumSectionSize">
-      <number>0</number>
-     </attribute>
-    </widget>
-   </item>
-  </layout>
- </widget>
- <resources/>
- <connections/>
-</ui>

src/platform/qt/SettingsView.cpp

@@ -204,6 +204,7 @@ void SettingsView::updateConfig() {
 	saveSetting("savestatePath", m_ui.savestatePath);
 	saveSetting("screenshotPath", m_ui.screenshotPath);
 	saveSetting("patchPath", m_ui.patchPath);
+	saveSetting("libraryStyle", m_ui.libraryStyle->currentIndex());
 	saveSetting("showLibrary", m_ui.showLibrary);
 	saveSetting("preload", m_ui.preload);
 

src/platform/qt/SettingsView.ui

@@ -398,28 +398,28 @@
      </widget>
      <widget class="QWidget" name="interface_2">
       <layout class="QFormLayout" name="formLayout_4">
-       <item row="3" column="1">
+       <item row="1" column="1">
-        <widget class="QCheckBox" name="allowOpposingDirections">
+        <widget class="QCheckBox" name="showLibrary">
          <property name="text">
-          <string>Allow opposing input directions</string>
+          <string>Show when no game open</string>
-         </property>
-        </widget>
-       </item>
-       <item row="4" column="1">
-        <widget class="QCheckBox" name="suspendScreensaver">
-         <property name="text">
-          <string>Suspend screensaver</string>
          </property>
          <property name="checked">
           <bool>true</bool>
          </property>
         </widget>
        </item>
-       <item row="5" column="1">
+       <item row="0" column="1">
-        <widget class="QCheckBox" name="pauseOnFocusLost">
+        <widget class="QComboBox" name="libraryStyle">
+         <item>
           <property name="text">
-          <string>Pause when inactive</string>
+           <string>List view</string>
           </property>
+         </item>
+         <item>
+          <property name="text">
+           <string>Tree view</string>
+          </property>
+         </item>
         </widget>
        </item>
        <item row="0" column="0">
@@ -429,21 +429,7 @@
          </property>
         </widget>
        </item>
-       <item row="0" column="1">
+       <item row="2" column="1">
-        <widget class="QCheckBox" name="showLibrary">
-         <property name="text">
-          <string>Show when no game open</string>
-         </property>
-        </widget>
-       </item>
-       <item row="2" column="0" colspan="2">
-        <widget class="Line" name="line_8">
-         <property name="orientation">
-          <enum>Qt::Horizontal</enum>
-         </property>
-        </widget>
-       </item>
-       <item row="1" column="1">
         <widget class="QPushButton" name="clearCache">
          <property name="enabled">
           <bool>false</bool>
@@ -453,6 +439,37 @@
          </property>
         </widget>
        </item>
+       <item row="3" column="0" colspan="2">
+        <widget class="Line" name="line_8">
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+        </widget>
+       </item>
+       <item row="4" column="1">
+        <widget class="QCheckBox" name="allowOpposingDirections">
+         <property name="text">
+          <string>Allow opposing input directions</string>
+         </property>
+        </widget>
+       </item>
+       <item row="5" column="1">
+        <widget class="QCheckBox" name="suspendScreensaver">
+         <property name="text">
+          <string>Suspend screensaver</string>
+         </property>
+         <property name="checked">
+          <bool>true</bool>
+         </property>
+        </widget>
+       </item>
+       <item row="6" column="1">
+        <widget class="QCheckBox" name="pauseOnFocusLost">
+         <property name="text">
+          <string>Pause when inactive</string>
+         </property>
+        </widget>
+       </item>
       </layout>
      </widget>
      <widget class="QWidget" name="emulation">

src/platform/qt/Window.cpp

@@ -14,10 +14,12 @@
 #include <QPainter>
 #include <QStackedLayout>
 
-#include "AboutScreen.h"
 #ifdef USE_SQLITE3
 #include "ArchiveInspector.h"
+#include "library/LibraryController.h"
 #endif
+
+#include "AboutScreen.h"
 #include "CheatsView.h"
 #include "ConfigController.h"
 #include "DebuggerConsole.h"
@@ -108,7 +110,7 @@ Window::Window(ConfigController* config, int playerId, QWidget* parent)
 		i = m_savedScale;
 	}
 #ifdef USE_SQLITE3
-	m_libraryView = new LibraryView();
+	m_libraryView = new LibraryController(nullptr, ConfigController::configDir() + "/library.sqlite3", m_config);
 	ConfigOption* showLibrary = m_config->addOption("showLibrary");
 	showLibrary->connect([this](const QVariant& value) {
 		if (value.toBool()) {
@@ -122,12 +124,17 @@ Window::Window(ConfigController* config, int playerId, QWidget* parent)
 		}
 	}, this);
 	m_config->updateOption("showLibrary");
+	ConfigOption* libraryStyle = m_config->addOption("libraryStyle");
+	libraryStyle->connect([this](const QVariant& value) {
+		m_libraryView->setViewStyle(static_cast<LibraryStyle>(value.toInt()));
+	}, this);
+	m_config->updateOption("libraryStyle");
 
-	connect(m_libraryView, &LibraryView::accepted, [this]() {
+	connect(m_libraryView, &LibraryController::startGame, [this]() {
 		VFile* output = m_libraryView->selectedVFile();
-		QPair<QString, QString> path = m_libraryView->selectedPath();
 		if (output) {
-			m_controller->loadGame(output, path.first, path.second);
+			QPair<QString, QString> path = m_libraryView->selectedPath();
+			m_controller->loadGame(output, path.second, path.first);
 		}
 	});
 #elif defined(M_CORE_GBA)

src/platform/qt/Window.h

@@ -28,7 +28,7 @@ class Display;
 class GameController;
 class GDBController;
 class GIFView;
-class LibraryView;
+class LibraryController;
 class LogView;
 class ShaderSelector;
 class ShortcutController;
@@ -199,7 +199,7 @@ private:
 #endif
 
 #ifdef USE_SQLITE3
-	LibraryView* m_libraryView;
+	LibraryController* m_libraryView;
 #endif
 };
 

src/platform/qt/library/LibraryController.cpp

@@ -0,0 +1,193 @@
+/* Copyright (c) 2014-2017 waddlesplash
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "LibraryController.h"
+
+#include "../GBAApp.h"
+#include "LibraryGrid.h"
+#include "LibraryTree.h"
+
+namespace QGBA {
+
+LibraryEntry::LibraryEntry(mLibraryEntry* entry)
+	: entry(entry)
+	, m_fullpath(QString("%1/%2").arg(entry->base, entry->filename))
+{
+}
+
+void AbstractGameList::addEntries(QList<LibraryEntryRef> items) {
+	for (LibraryEntryRef o : items) {
+		addEntry(o);
+	}
+}
+void AbstractGameList::removeEntries(QList<LibraryEntryRef> items) {
+	for (LibraryEntryRef o : items) {
+		addEntry(o);
+	}
+}
+
+LibraryLoaderThread::LibraryLoaderThread(QObject* parent)
+	: QThread(parent)
+{
+}
+
+void LibraryLoaderThread::run() {
+	mLibraryLoadDirectory(m_library, m_directory.toUtf8().constData());
+	m_directory = QString();
+}
+
+LibraryController::LibraryController(QWidget* parent, const QString& path, ConfigController* config)
+	: QStackedWidget(parent)
+	, m_config(config)
+{
+	mLibraryListingInit(&m_listing, 0);
+
+	if (!path.isNull()) {
+		m_library = mLibraryLoad(path.toUtf8().constData());
+	} else {
+		m_library = mLibraryCreateEmpty();
+	}
+
+	mLibraryAttachGameDB(m_library, GBAApp::app()->gameDB());
+
+	m_libraryTree = new LibraryTree(this);
+	addWidget(m_libraryTree->widget());
+
+	m_libraryGrid = new LibraryGrid(this);
+	addWidget(m_libraryGrid->widget());
+
+	connect(&m_loaderThread, &QThread::finished, this, &LibraryController::refresh, Qt::QueuedConnection);
+
+	setViewStyle(LibraryStyle::STYLE_LIST);
+	refresh();
+}
+
+LibraryController::~LibraryController() {
+	mLibraryListingDeinit(&m_listing);
+
+	if (m_loaderThread.isRunning()) {
+		m_loaderThread.wait();
+	}
+	if (!m_loaderThread.isRunning() && m_loaderThread.m_library) {
+		m_library = m_loaderThread.m_library;
+		m_loaderThread.m_library = nullptr;
+	}
+	if (m_library) {
+		mLibraryDestroy(m_library);
+	}
+}
+
+void LibraryController::setViewStyle(LibraryStyle newStyle) {
+	m_currentStyle = newStyle;
+
+	AbstractGameList* newCurrentList = nullptr;
+	if (newStyle == LibraryStyle::STYLE_LIST || newStyle == LibraryStyle::STYLE_TREE) {
+		newCurrentList = m_libraryTree;
+	} else {
+		newCurrentList = m_libraryGrid;
+	}
+	newCurrentList->selectEntry(selectedEntry());
+	newCurrentList->setViewStyle(newStyle);
+	setCurrentWidget(newCurrentList->widget());
+	m_currentList = newCurrentList;
+}
+
+void LibraryController::selectEntry(LibraryEntryRef entry) {
+	if (!m_currentList) {
+		return;
+	}
+	m_currentList->selectEntry(entry);
+}
+
+LibraryEntryRef LibraryController::selectedEntry() {
+	if (!m_currentList) {
+		return LibraryEntryRef();
+	}
+	return m_currentList->selectedEntry();
+}
+
+VFile* LibraryController::selectedVFile() {
+	LibraryEntryRef entry = selectedEntry();
+	if (entry) {
+		return mLibraryOpenVFile(m_library, entry->entry);
+	} else {
+		return nullptr;
+	}
+}
+
+QPair<QString, QString> LibraryController::selectedPath() {
+	LibraryEntryRef e = selectedEntry();
+	return e ? qMakePair(e->base(), e->filename()) : qMakePair<QString, QString>("", "");
+}
+
+void LibraryController::addDirectory(const QString& dir) {
+	m_loaderThread.m_directory = dir;
+	m_loaderThread.m_library = m_library;
+	// The m_loaderThread temporarily owns the library
+	m_library = nullptr;
+	m_loaderThread.start();
+}
+
+void LibraryController::refresh() {
+	if (!m_library) {
+		if (!m_loaderThread.isRunning() && m_loaderThread.m_library) {
+			m_library = m_loaderThread.m_library;
+			m_loaderThread.m_library = nullptr;
+		} else {
+			return;
+		}
+	}
+
+	setDisabled(true);
+
+	QStringList allEntries;
+	QList<LibraryEntryRef> newEntries;
+
+	mLibraryListingClear(&m_listing);
+	mLibraryGetEntries(m_library, &m_listing, 0, 0, nullptr);
+	for (size_t i = 0; i < mLibraryListingSize(&m_listing); i++) {
+		mLibraryEntry* entry = mLibraryListingGetPointer(&m_listing, i);
+		QString fullpath = QString("%1/%2").arg(entry->base, entry->filename);
+		if (m_entries.contains(fullpath)) {
+			m_entries.value(fullpath)->entry = entry;
+		} else {
+			LibraryEntryRef libentry = std::make_shared<LibraryEntry>(entry);
+			m_entries.insert(fullpath, libentry);
+			newEntries.append(libentry);
+		}
+		allEntries.append(fullpath);
+	}
+
+	// Check for entries that were removed
+	QList<LibraryEntryRef> removedEntries;
+	for (QString& path : m_entries.keys()) {
+		if (!allEntries.contains(path)) {
+			removedEntries.append(m_entries.value(path));
+			m_entries.remove(path);
+		}
+	}
+
+	m_libraryTree->addEntries(newEntries);
+	m_libraryGrid->addEntries(newEntries);
+
+	m_libraryTree->removeEntries(removedEntries);
+	m_libraryGrid->removeEntries(removedEntries);
+
+	setDisabled(false);
+	selectLastBootedGame();
+	emit doneLoading();
+}
+
+void LibraryController::selectLastBootedGame() {
+	if (!m_config) {
+		return;
+	}
+	const QString lastfile = m_config->getMRU().first();
+	if (m_entries.contains(lastfile)) {
+		selectEntry(m_entries.value(lastfile));
+	}
+}
+
+}

src/platform/qt/library/LibraryController.h

@@ -0,0 +1,126 @@
+/* Copyright (c) 2014-2017 waddlesplash
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef QGBA_LIBRARY_CONTROLLER
+#define QGBA_LIBRARY_CONTROLLER
+
+#include <memory>
+
+#include <QList>
+#include <QMap>
+#include <QThread>
+#include <QStackedWidget>
+
+#include <mgba/core/library.h>
+
+namespace QGBA {
+
+// Predefinitions
+class LibraryGrid;
+class LibraryTree;
+class ConfigController;
+
+enum class LibraryStyle {
+	STYLE_LIST = 0,
+	STYLE_TREE,
+	STYLE_GRID,
+	STYLE_ICON
+};
+
+class LibraryEntry final {
+public:
+	LibraryEntry(mLibraryEntry* entry);
+
+	QString displayTitle() const { return title().isNull() ? filename() : title(); }
+
+	QString base() const { return QString(entry->base); }
+	QString filename() const { return QString(entry->filename); }
+	QString fullpath() const { return m_fullpath; }
+	QString title() const { return QString(entry->title); }
+	QByteArray internalTitle() const { return QByteArray(entry->internalTitle); }
+	QByteArray internalCode() const { return QByteArray(entry->internalCode); }
+	mPlatform platform() const { return entry->platform; }
+	size_t filesize() const { return entry->filesize; }
+	uint32_t crc32() const { return entry->crc32; }
+
+	const mLibraryEntry* entry;
+private:
+	const QString m_fullpath;
+};
+typedef std::shared_ptr<LibraryEntry> LibraryEntryRef;
+
+class AbstractGameList {
+public:
+	virtual LibraryEntryRef selectedEntry() = 0;
+	virtual void selectEntry(LibraryEntryRef game) = 0;
+
+	virtual void setViewStyle(LibraryStyle newStyle) = 0;
+
+	virtual void addEntry(LibraryEntryRef item) = 0;
+	virtual void addEntries(QList<LibraryEntryRef> items);
+
+	virtual void removeEntry(LibraryEntryRef item) = 0;
+	virtual void removeEntries(QList<LibraryEntryRef> items);
+
+	virtual QWidget* widget() = 0;
+};
+
+class LibraryLoaderThread final : public QThread {
+Q_OBJECT
+
+public:
+	LibraryLoaderThread(QObject* parent = nullptr);
+
+	mLibrary* m_library = nullptr;
+	QString m_directory;
+
+protected:
+	virtual void run() override;
+};
+
+class LibraryController final : public QStackedWidget {
+Q_OBJECT
+
+public:
+	LibraryController(QWidget* parent = nullptr, const QString& path = QString(),
+	    ConfigController* config = nullptr);
+	~LibraryController();
+
+	LibraryStyle viewStyle() const { return m_currentStyle; }
+	void setViewStyle(LibraryStyle newStyle);
+
+	void selectEntry(LibraryEntryRef entry);
+	LibraryEntryRef selectedEntry();
+	VFile* selectedVFile();
+	QPair<QString, QString> selectedPath();
+
+	void selectLastBootedGame();
+
+	void addDirectory(const QString& dir);
+
+signals:
+	void startGame();
+	void doneLoading();
+
+private slots:
+	void refresh();
+
+private:
+	ConfigController* m_config = nullptr;
+	LibraryLoaderThread m_loaderThread;
+	mLibrary* m_library = nullptr;
+	mLibraryListing m_listing;
+	QMap<QString, LibraryEntryRef> m_entries;
+
+	LibraryStyle m_currentStyle;
+	AbstractGameList* m_currentList = nullptr;
+
+	LibraryGrid* m_libraryGrid = nullptr;
+	LibraryTree* m_libraryTree = nullptr;
+};
+
+}
+
+#endif

src/platform/qt/library/LibraryGrid.cpp

@@ -0,0 +1,79 @@
+/* Copyright (c) 2014-2017 waddlesplash
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "LibraryGrid.h"
+
+namespace QGBA {
+
+LibraryGrid::LibraryGrid(LibraryController* parent)
+    : m_widget(new QListWidget(parent))
+{
+	m_widget->setObjectName("LibraryGrid");
+	m_widget->setWrapping(true);
+	m_widget->setResizeMode(QListView::Adjust);
+	m_widget->setUniformItemSizes(true);
+	setViewStyle(LibraryStyle::STYLE_GRID);
+
+	QObject::connect(m_widget, &QListWidget::itemActivated, parent, &LibraryController::startGame);
+}
+
+LibraryGrid::~LibraryGrid() {
+	delete m_widget;
+}
+
+LibraryEntryRef LibraryGrid::selectedEntry() {
+	if (!m_widget->selectedItems().empty()) {
+		return m_items.key(m_widget->selectedItems().at(0));
+	} else {
+		return LibraryEntryRef();
+	}
+}
+
+void LibraryGrid::selectEntry(LibraryEntryRef game) {
+	if (!game) {
+		return;
+	}
+	if (!m_widget->selectedItems().empty()) {
+		m_widget->selectedItems().at(0)->setSelected(false);
+	}
+	m_items.value(game)->setSelected(true);
+}
+
+void LibraryGrid::setViewStyle(LibraryStyle newStyle) {
+	if (newStyle == LibraryStyle::STYLE_GRID) {
+		m_currentStyle = LibraryStyle::STYLE_GRID;
+		m_widget->setIconSize(QSize(GRID_BANNER_WIDTH, GRID_BANNER_HEIGHT));
+		m_widget->setViewMode(QListView::IconMode);
+	} else {
+		m_currentStyle = LibraryStyle::STYLE_ICON;
+		m_widget->setIconSize(QSize(ICON_BANNER_WIDTH, ICON_BANNER_HEIGHT));
+		m_widget->setViewMode(QListView::ListMode);
+	}
+
+	// QListView resets this when you change the view mode, so let's set it again
+	m_widget->setDragEnabled(false);
+}
+
+void LibraryGrid::addEntry(LibraryEntryRef item) {
+	if (m_items.contains(item)) {
+		return;
+	}
+
+	QListWidgetItem* i = new QListWidgetItem;
+	i->setText(item->displayTitle());
+
+	m_widget->addItem(i);
+	m_items.insert(item, i);
+}
+
+void LibraryGrid::removeEntry(LibraryEntryRef entry) {
+	if (!m_items.contains(entry)) {
+		return;
+	}
+
+	delete m_items.take(entry);
+}
+
+}

src/platform/qt/library/LibraryGrid.h

@@ -0,0 +1,50 @@
+/* Copyright (c) 2014-2017 waddlesplash
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef QGBA_LIBRARY_GRID
+#define QGBA_LIBRARY_GRID
+
+#include <QListWidget>
+
+#include "LibraryController.h"
+
+namespace QGBA {
+
+class LibraryGrid final : public AbstractGameList {
+public:
+	explicit LibraryGrid(LibraryController* parent = nullptr);
+	~LibraryGrid();
+
+	// AbstractGameList stuff
+	virtual LibraryEntryRef selectedEntry() override;
+	virtual void selectEntry(LibraryEntryRef game) override;
+
+	virtual void setViewStyle(LibraryStyle newStyle) override;
+
+	virtual void addEntry(LibraryEntryRef item) override;
+	virtual void removeEntry(LibraryEntryRef entry) override;
+
+	virtual QWidget* widget() override { return m_widget; }
+
+signals:
+	void startGame();
+
+private:
+	QListWidget* m_widget;
+
+	// Game banner image size
+	const quint32 GRID_BANNER_WIDTH = 320;
+	const quint32 GRID_BANNER_HEIGHT = 240;
+
+	const quint32 ICON_BANNER_WIDTH = 64;
+	const quint32 ICON_BANNER_HEIGHT = 64;
+
+	QMap<LibraryEntryRef, QListWidgetItem*> m_items;
+	LibraryStyle m_currentStyle;
+};
+
+}
+
+#endif

src/platform/qt/library/LibraryTree.cpp

@@ -0,0 +1,179 @@
+/* Copyright (c) 2014-2017 waddlesplash
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "LibraryTree.h"
+
+#include "utils.h"
+
+#include <QApplication>
+#include <QDir>
+
+namespace QGBA {
+
+class TreeWidgetItem : public QTreeWidgetItem {
+public:
+	TreeWidgetItem(QTreeWidget* parent = nullptr) : QTreeWidgetItem(parent) {}
+	void setFilesize(size_t size);
+
+	virtual bool operator<(const QTreeWidgetItem& other) const override;
+protected:
+	size_t m_size = 0;
+};
+
+void TreeWidgetItem::setFilesize(size_t size) {
+	m_size = size;
+	setText(LibraryTree::COL_SIZE, niceSizeFormat(size));
+}
+
+bool TreeWidgetItem::operator<(const QTreeWidgetItem& other) const {
+	const int column = treeWidget()->sortColumn();
+	return ((column == LibraryTree::COL_SIZE) ?
+		m_size < dynamic_cast<const TreeWidgetItem*>(&other)->m_size :
+		QTreeWidgetItem::operator<(other));
+}
+
+LibraryTree::LibraryTree(LibraryController* parent)
+	: m_widget(new QTreeWidget(parent))
+	, m_controller(parent)
+{
+	m_widget->setObjectName("LibraryTree");
+	m_widget->setSortingEnabled(true);
+	m_widget->setAlternatingRowColors(true);
+
+	QTreeWidgetItem* header = new QTreeWidgetItem({
+		QApplication::translate("LibraryTree", "Name", nullptr),
+		QApplication::translate("LibraryTree", "Location", nullptr),
+		QApplication::translate("LibraryTree", "Platform", nullptr),
+		QApplication::translate("LibraryTree", "Size", nullptr),
+		QApplication::translate("LibraryTree", "CRC32", nullptr),
+	});
+	header->setTextAlignment(3, Qt::AlignTrailing | Qt::AlignVCenter);
+	m_widget->setHeaderItem(header);
+
+	setViewStyle(LibraryStyle::STYLE_TREE);
+	m_widget->sortByColumn(COL_NAME, Qt::AscendingOrder);
+
+	QObject::connect(m_widget, &QTreeWidget::itemActivated, [this](QTreeWidgetItem* item, int) -> void {
+		if (!m_pathNodes.values().contains(item)) {
+			emit m_controller->startGame();
+		}
+	});
+}
+
+void LibraryTree::resizeAllCols() {
+	for (int i = 0; i < m_widget->columnCount(); i++) {
+		m_widget->resizeColumnToContents(i);
+	}
+}
+
+LibraryEntryRef LibraryTree::selectedEntry() {
+	if (!m_widget->selectedItems().empty()) {
+		return m_items.key(m_widget->selectedItems().at(0));
+	} else {
+		return LibraryEntryRef();
+	}
+}
+
+void LibraryTree::selectEntry(LibraryEntryRef game) {
+	if (!game) {
+		return;
+	}
+	if (!m_widget->selectedItems().empty()) {
+		m_widget->selectedItems().at(0)->setSelected(false);
+	}
+	m_items.value(game)->setSelected(true);
+}
+
+void LibraryTree::setViewStyle(LibraryStyle newStyle) {
+	if (newStyle == LibraryStyle::STYLE_LIST) {
+		m_currentStyle = LibraryStyle::STYLE_LIST;
+		m_widget->setIndentation(0);
+		rebuildTree();
+	} else {
+		m_currentStyle = LibraryStyle::STYLE_TREE;
+		m_widget->setIndentation(20);
+		rebuildTree();
+	}
+}
+
+void LibraryTree::addEntries(QList<LibraryEntryRef> items) {
+	m_deferredTreeRebuild = true;
+	AbstractGameList::addEntries(items);
+	m_deferredTreeRebuild = false;
+	rebuildTree();
+}
+
+void LibraryTree::addEntry(LibraryEntryRef item) {
+	if (m_items.contains(item)) {
+		return;
+	}
+
+	QString folder = item->base();
+	if (!m_pathNodes.contains(folder)) {
+		QTreeWidgetItem* i = new TreeWidgetItem;
+		i->setText(0, folder.section("/", -1));
+		m_pathNodes.insert(folder, i);
+		if (m_currentStyle == LibraryStyle::STYLE_TREE) {
+			m_widget->addTopLevelItem(i);
+		}
+	}
+
+	TreeWidgetItem* i = new TreeWidgetItem;
+	i->setText(COL_NAME, item->displayTitle());
+	i->setText(COL_LOCATION, QDir::toNativeSeparators(item->base()));
+	i->setText(COL_PLATFORM, nicePlatformFormat(item->platform()));
+	i->setFilesize(item->filesize());
+	i->setTextAlignment(COL_SIZE, Qt::AlignRight);
+	i->setText(COL_CRC32, QString("%0").arg(item->crc32(), 8, 16, QChar('0')));
+	m_items.insert(item, i);
+
+	rebuildTree();
+}
+
+void LibraryTree::removeEntry(LibraryEntryRef item) {
+	if (!m_items.contains(item)) {
+		return;
+	}
+	delete m_items.take(item);
+}
+
+void LibraryTree::rebuildTree() {
+	if (m_deferredTreeRebuild) {
+		return;
+	}
+
+	LibraryEntryRef currentGame = selectedEntry();
+
+	int count = m_widget->topLevelItemCount();
+	for (int a = 0; a < count; a++) {
+		m_widget->takeTopLevelItem(0);
+	}
+
+	for (QTreeWidgetItem* i : m_pathNodes.values()) {
+		count = i->childCount();
+		for (int a = 0; a < count; a++) {
+			i->takeChild(0);
+		}
+	}
+
+	if (m_currentStyle == LibraryStyle::STYLE_TREE) {
+		for (QTreeWidgetItem* i : m_pathNodes.values()) {
+			m_widget->addTopLevelItem(i);
+		}
+		for (QTreeWidgetItem* i : m_items.values()) {
+			m_pathNodes.value(m_items.key(i)->base())->addChild(i);
+		}
+	} else {
+		for (QTreeWidgetItem* i : m_items.values()) {
+			m_widget->addTopLevelItem(i);
+		}
+	}
+
+	m_widget->expandAll();
+	resizeAllCols();
+	selectEntry(currentGame);
+}
+
+}

src/platform/qt/library/LibraryTree.h

@@ -0,0 +1,57 @@
+/* Copyright (c) 2014-2017 waddlesplash
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef QGBA_LIBRARY_TREE
+#define QGBA_LIBRARY_TREE
+
+#include <QTreeWidget>
+
+#include "LibraryController.h"
+
+namespace QGBA {
+
+class LibraryTree final : public AbstractGameList {
+
+public:
+	enum Columns {
+		COL_NAME = 0,
+		COL_LOCATION = 1,
+		COL_PLATFORM = 2,
+		COL_SIZE = 3,
+		COL_CRC32 = 4,
+	};
+
+	explicit LibraryTree(LibraryController* parent = nullptr);
+	~LibraryTree();
+
+	// AbstractGameList stuff
+	virtual LibraryEntryRef selectedEntry() override;
+	virtual void selectEntry(LibraryEntryRef game) override;
+
+	virtual void setViewStyle(LibraryStyle newStyle) override;
+
+	virtual void addEntries(QList<LibraryEntryRef> items) override;
+	virtual void addEntry(LibraryEntryRef item) override;
+	virtual void removeEntry(LibraryEntryRef item) override;
+
+	virtual QWidget* widget() override { return m_widget; }
+
+private:
+	QTreeWidget* m_widget;
+	LibraryStyle m_currentStyle;
+
+	LibraryController* m_controller;
+
+	bool m_deferredTreeRebuild = false;
+	QMap<LibraryEntryRef, QTreeWidgetItem*> m_items;
+	QMap<QString, QTreeWidgetItem*> m_pathNodes;
+
+	void rebuildTree();
+	void resizeAllCols();
+};
+
+}
+
+#endif

src/platform/qt/utils.cpp

@@ -0,0 +1,40 @@
+/* Copyright (c) 2013-2017 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "utils.h"
+
+#include <QObject>
+
+namespace QGBA {
+
+QString niceSizeFormat(size_t filesize) {
+	double size = filesize;
+	QString unit = "B";
+	if (size >= 1024.0) {
+		size /= 1024.0;
+		unit = "kiB";
+	}
+	if (size >= 1024.0) {
+		size /= 1024.0;
+		unit = "MiB";
+	}
+	return QString("%0 %1").arg(size, 0, 'f', 1).arg(unit);
+}
+QString nicePlatformFormat(mPlatform platform) {
+	switch (platform) {
+#ifdef M_CORE_GBA
+	case PLATFORM_GBA:
+		return QObject::tr("GBA");
+#endif
+#ifdef M_CORE_GB
+	case PLATFORM_GB:
+		return QObject::tr("GB");
+#endif
+	default:
+		return QObject::tr("?");
+	}
+}
+
+}

src/platform/qt/utils.h

@@ -0,0 +1,20 @@
+/* Copyright (c) 2013-2017 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef QGBA_UTILS_H
+#define QGBA_UTILS_H
+
+#include <mgba/core/core.h>
+
+#include <QString>
+
+namespace QGBA {
+
+QString niceSizeFormat(size_t filesize);
+QString nicePlatformFormat(mPlatform platform);
+
+}
+
+#endif