Fix problem with instance list not using the instance folder path

MultiMC.cpp

@@ -139,9 +139,12 @@ MultiMC::MultiMC(int &argc, char **argv) : QApplication(argc, argv)
 	initGlobalSettings();
 
 	// and instances
-	m_instances.reset(new InstanceList(m_settings->get("InstanceDir").toString(), this));
+	auto InstDirSetting = m_settings->getSetting("InstanceDir");
+	m_instances.reset(new InstanceList(InstDirSetting->get().toString(), this));
 	QLOG_INFO() << "Loading Instances...";
 	m_instances->loadList();
+	connect(InstDirSetting, SIGNAL(settingChanged(const Setting &, QVariant)),
+			m_instances.get(), SLOT(on_InstFolderChanged(const Setting &, QVariant)));
 
 	// init the http meta cache
 	initHttpMetaCache();

depends/util/include/pathutils.h

@@ -25,6 +25,16 @@ LIBUTIL_EXPORT QString PathCombine(QString path1, QString path2, QString path3);
 
 LIBUTIL_EXPORT QString AbsolutePath(QString path);
 
+/**
+ * Normalize path
+ * 
+ * Any paths inside the current directory will be normalized to relative paths (to current)
+ * Other paths will be made absolute
+ * 
+ * Returns false if the path logic somehow filed (and normalizedPath in invalid)
+ */
+QString NormalizePath(QString path);
+
 LIBUTIL_EXPORT QString RemoveInvalidFilenameChars(QString string, QChar replaceWith = '-');
 
 LIBUTIL_EXPORT QString DirNameFromString(QString string, QString inDir = ".");

depends/util/src/pathutils.cpp

@@ -39,6 +39,30 @@ QString AbsolutePath(QString path)
 	return QFileInfo(path).absolutePath();
 }
 
+/**
+ * Normalize path
+ * 
+ * Any paths inside the current directory will be normalized to relative paths (to current)
+ * Other paths will be made absolute
+ */
+QString NormalizePath(QString path)
+{
+	QDir a = QDir::currentPath();
+	QString currentAbsolute = a.absolutePath();
+
+	QDir b(path);
+	QString newAbsolute = b.absolutePath();
+
+	if (newAbsolute.startsWith(currentAbsolute))
+	{
+		return a.relativeFilePath(newAbsolute);
+	}
+	else
+	{
+		return newAbsolute;
+	}
+}
+
 QString badFilenameChars = "\"\\/?<>:*|!";
 
 QString RemoveInvalidFilenameChars(QString string, QChar replaceWith)

gui/settingsdialog.cpp

@@ -22,12 +22,12 @@
 #include "logic/lists/JavaVersionList.h"
 
 #include <settingsobject.h>
+#include <pathutils.h>
 #include <QFileDialog>
 #include <QMessageBox>
+#include <QDir>
 
-SettingsDialog::SettingsDialog(QWidget *parent) :
-	QDialog(parent),
-	ui(new Ui::SettingsDialog)
+SettingsDialog::SettingsDialog(QWidget *parent) : QDialog(parent), ui(new Ui::SettingsDialog)
 {
 	MultiMCPlatform::fixWM_CLASS(this);
 	ui->setupUi(this);
@@ -40,7 +40,7 @@ SettingsDialog::~SettingsDialog()
 {
 	delete ui;
 }
-void SettingsDialog::showEvent ( QShowEvent* ev )
+void SettingsDialog::showEvent(QShowEvent *ev)
 {
 	QDialog::showEvent(ev);
 	adjustSize();
@@ -49,15 +49,20 @@ void SettingsDialog::showEvent ( QShowEvent* ev )
 void SettingsDialog::updateCheckboxStuff()
 {
 	ui->windowWidthSpinBox->setEnabled(!ui->maximizedCheckBox->isChecked());
-	ui->windowHeightSpinBox->setEnabled(! ui->maximizedCheckBox->isChecked());
+	ui->windowHeightSpinBox->setEnabled(!ui->maximizedCheckBox->isChecked());
 }
 
 void SettingsDialog::on_instDirBrowseBtn_clicked()
 {
-	QString dir = QFileDialog::getExistingDirectory(this, tr("Instance Directory"), 
+	QString raw_dir = QFileDialog::getExistingDirectory(this, tr("Instance Directory"),
 													ui->instDirTextBox->text());
-	if (!dir.isEmpty())
-		ui->instDirTextBox->setText(dir);
+	QString cooked_dir = NormalizePath(raw_dir);
+
+	// do not allow current dir - it's dirty. Do not allow dirs that don't exist
+	if (!cooked_dir.isEmpty() && QDir(cooked_dir).exists())
+	{
+		ui->instDirTextBox->setText(cooked_dir);
+	}
 }
 
 void SettingsDialog::on_modsDirBrowseBtn_clicked()
@@ -65,7 +70,9 @@ void SettingsDialog::on_modsDirBrowseBtn_clicked()
 	QString dir = QFileDialog::getExistingDirectory(this, tr("Mods Directory"),
 													ui->modsDirTextBox->text());
 	if (!dir.isEmpty())
+	{
 		ui->modsDirTextBox->setText(dir);
+	}
 }
 
 void SettingsDialog::on_lwjglDirBrowseBtn_clicked()
@@ -73,7 +80,9 @@ void SettingsDialog::on_lwjglDirBrowseBtn_clicked()
 	QString dir = QFileDialog::getExistingDirectory(this, tr("LWJGL Directory"),
 													ui->lwjglDirTextBox->text());
 	if (!dir.isEmpty())
+	{
 		ui->lwjglDirTextBox->setText(dir);
+	}
 }
 
 void SettingsDialog::on_compatModeCheckBox_clicked(bool checked)
@@ -104,7 +113,8 @@ void SettingsDialog::applySettings(SettingsObject *s)
 	}
 	else if (!s->get("UseDevBuilds").toBool())
 	{
-		int response = QMessageBox::question(this, tr("Development builds"), 
+		int response = QMessageBox::question(
+			this, tr("Development builds"),
 			tr("Development builds contain experimental features "
 			   "and may be unstable. Are you sure you want to enable them?"));
 		if (response == QMessageBox::Yes)
@@ -113,7 +123,6 @@ void SettingsDialog::applySettings(SettingsObject *s)
 		}
 	}
 
-	
 	// Updates
 	s->set("AutoUpdate", ui->autoUpdateCheckBox->isChecked());
 
@@ -204,7 +213,7 @@ void SettingsDialog::on_pushButton_clicked()
 void SettingsDialog::on_btnBrowse_clicked()
 {
 	QString dir = QFileDialog::getOpenFileName(this, tr("Find Java executable"));
-	if(!dir.isNull())
+	if (!dir.isNull())
 	{
 		ui->javaPathTextBox->setText(dir);
 	}

logic/lists/InstanceList.cpp

@@ -34,7 +34,7 @@
 const static int GROUP_FILE_FORMAT_VERSION = 1;
 
 InstanceList::InstanceList(const QString &instDir, QObject *parent)
-	: QAbstractListModel(parent), m_instDir("instances")
+	: QAbstractListModel(parent), m_instDir(instDir)
 {
 }
 
@@ -269,7 +269,8 @@ InstanceList::InstListError InstanceList::loadList()
 
 	m_instances.clear();
 	QDir dir(m_instDir);
-	QDirIterator iter(dir);
+	QDirIterator iter(m_instDir, QDir::Dirs | QDir::NoDot | QDir::NoDotDot | QDir::Readable,
+					  QDirIterator::FollowSymlinks);
 	while (iter.hasNext())
 	{
 		QString subDir = iter.next();
@@ -340,7 +341,12 @@ void InstanceList::clear()
 	endResetModel();
 	emit dataIsInvalid();
 }
-;
+
+void InstanceList::on_InstFolderChanged(const Setting &setting, QVariant value)
+{
+	m_instDir = value.toString();
+	loadList();
+}
 
 /// Add an instance. Triggers notifications, returns the new index
 int InstanceList::add(InstancePtr t)

logic/lists/InstanceList.h

@@ -29,7 +29,7 @@ class InstanceList : public QAbstractListModel
 {
 	Q_OBJECT
 private:
-	void loadGroupList(QMap<QString, QString> & groupList);
+	void loadGroupList(QMap<QString, QString> &groupList);
 	void saveGroupList();
 
 public:
@@ -37,10 +37,10 @@ public:
 	virtual ~InstanceList();
 
 public:
-	QModelIndex  index ( int row, int column = 0, const QModelIndex& parent = QModelIndex() ) const;
-	int rowCount ( const QModelIndex& parent = QModelIndex() ) const;
-	QVariant data ( const QModelIndex& index, int role ) const;
-	Qt::ItemFlags flags ( const QModelIndex& index ) const;
+	QModelIndex index(int row, int column = 0, const QModelIndex &parent = QModelIndex()) const;
+	int rowCount(const QModelIndex &parent = QModelIndex()) const;
+	QVariant data(const QModelIndex &index, int role) const;
+	Qt::ItemFlags flags(const QModelIndex &index) const;
 
 	enum AdditionalRoles
 	{
@@ -57,7 +57,10 @@ public:
 		UnknownError
 	};
 
-	QString instDir() const { return m_instDir; }
+	QString instDir() const
+	{
+		return m_instDir;
+	}
 
 	/*!
 	 * \brief Loads the instance list. Triggers notifications.
@@ -70,7 +73,8 @@ public:
 	InstancePtr at(int i) const
 	{
 		return m_instances.at(i);
-	};
+	}
+	;
 
 	/*!
 	 * \brief Get the count of loaded instances
@@ -78,7 +82,8 @@ public:
 	int count() const
 	{
 		return m_instances.count();
-	};
+	}
+	;
 
 	/// Clear all instances. Triggers notifications.
 	void clear();
@@ -87,27 +92,33 @@ public:
 	int add(InstancePtr t);
 
 	/// Get an instance by ID
-	InstancePtr getInstanceById (QString id);
+	InstancePtr getInstanceById(QString id);
 signals:
 	void dataIsInvalid();
 
-private slots:
-	void propertiesChanged(BaseInstance * inst);
-	void instanceNuked(BaseInstance * inst);
+public
+slots:
+	void on_InstFolderChanged(const Setting & setting, QVariant value);
+
+private
+slots:
+	void propertiesChanged(BaseInstance *inst);
+	void instanceNuked(BaseInstance *inst);
 	void groupChanged();
+
 private:
-	int getInstIndex(BaseInstance * inst);
+	int getInstIndex(BaseInstance *inst);
+
 protected:
 	QString m_instDir;
-	QList< InstancePtr > m_instances;
+	QList<InstancePtr> m_instances;
 };
 
 class InstanceProxyModel : public KCategorizedSortFilterProxyModel
 {
 public:
-	explicit InstanceProxyModel ( QObject *parent = 0 );
+	explicit InstanceProxyModel(QObject *parent = 0);
 
 protected:
-	virtual bool subSortLessThan ( const QModelIndex& left, const QModelIndex& right ) const;
+	virtual bool subSortLessThan(const QModelIndex &left, const QModelIndex &right) const;
 };
-