Many improvements

PermGen can be tweaked from the settings menu
Groups are saved on change/exit
Install target is no longer completely broken
All the deplibs are now static
Added notes dialog
Fixed ini file format support (can save strings with newlines, tabs. UTF-8 is explicitly used!)
Rename button now uses line breaks so it doesn't grow ever wider (Added a custom tool button subclass)
There is now a CAT button. Meow.

logic/BaseInstance.cpp

@@ -71,6 +71,7 @@ BaseInstance::BaseInstance( BaseInstancePrivate* d_in,
 	settings().registerSetting(new Setting("OverrideMemory", false));
 	settings().registerSetting(new OverrideSetting("MinMemAlloc", globalSettings->getSetting("MinMemAlloc")));
 	settings().registerSetting(new OverrideSetting("MaxMemAlloc", globalSettings->getSetting("MaxMemAlloc")));
+	settings().registerSetting(new OverrideSetting("PermGen", globalSettings->getSetting("PermGen")));
 	
 	// Auto login
 	settings().registerSetting(new Setting("OverrideLogin", false));
@@ -187,12 +188,20 @@ void BaseInstance::setLastLaunch ( qint64 val )
 	emit propertiesChanged ( this );
 }
 
-void BaseInstance::setGroup ( QString val )
+void BaseInstance::setGroupInitial ( QString val )
 {
 	I_D(BaseInstance);
 	d->m_group = val;
 	emit propertiesChanged ( this );
 }
+
+void BaseInstance::setGroupPost ( QString val )
+{
+	setGroupInitial(val);
+	emit groupChanged();
+}
+
+
 QString BaseInstance::group() const
 {
 	I_D(BaseInstance);

logic/BaseInstance.h

@@ -70,7 +70,9 @@ public:
 	void setNotes(QString val);
 	
 	QString group() const;
-	void setGroup(QString val);
+	void setGroupInitial(QString val);
+	void setGroupPost(QString val);
+	
 	
 	virtual QString intendedVersionId() const = 0;
 	virtual bool setIntendedVersionId(QString version) = 0;
@@ -157,12 +159,16 @@ public:
 	
 	/// FIXME: this really should be elsewhere...
 	virtual QString instanceConfigFolder() const = 0;
+	
 signals:
 	/*!
 	 * \brief Signal emitted when properties relevant to the instance view change
 	 */
 	void propertiesChanged(BaseInstance * inst);
-	
+	/*!
+	 * \brief Signal emitted when groups are affected in any way
+	 */
+	void groupChanged();
 protected:
 	QSharedPointer<BaseInstancePrivate> inst_d;
 };

logic/LegacyInstance.cpp

@@ -68,6 +68,7 @@ MinecraftProcess* LegacyInstance::prepareForLaunch(QString user, QString session
 		// launcher arguments
 		args << QString("-Xms%1m").arg(settings().get("MinMemAlloc").toInt());
 		args << QString("-Xmx%1m").arg(settings().get("MaxMemAlloc").toInt());
+		args << QString("-XX:MaxPermSize=%1m").arg(settings().get("PermGen").toInt());
 		args << "-jar" << LAUNCHER_FILE;
 		args << user;
 		args << session;

logic/OneSixInstance.cpp

@@ -113,6 +113,7 @@ MinecraftProcess* OneSixInstance::prepareForLaunch ( QString user, QString sessi
 	args.append(Util::Commandline::splitArgs(settings().get("JvmArgs").toString()));
 	args << QString("-Xms%1m").arg(settings().get("MinMemAlloc").toInt());
 	args << QString("-Xmx%1m").arg(settings().get("MaxMemAlloc").toInt());
+	args << QString("-XX:MaxPermSize=%1m").arg(settings().get("PermGen").toInt());
 	QDir natives_dir(natives_dir_raw);
 	args << QString("-Djava.library.path=%1").arg( natives_dir.absolutePath() );
 	QString classPath;

logic/lists/InstanceList.cpp

@@ -14,6 +14,7 @@
  */
 
 #include <QDir>
+#include <QSet>
 #include <QFile>
 #include <QDirIterator>
 #include <QThread>
@@ -36,6 +37,73 @@ InstanceList::InstanceList(const QString &instDir, QObject *parent) :
 	
 }
 
+InstanceList::~InstanceList()
+{
+	saveGroupList();
+}
+
+
+void InstanceList::groupChanged()
+{
+	// save the groups. save all of them.
+	saveGroupList();
+}
+
+void InstanceList::saveGroupList()
+{
+	QString groupFileName = m_instDir + "/instgroups.json";
+	QFile groupFile(groupFileName);
+	
+	// if you can't open the file, fail
+	if (!groupFile.open(QIODevice::WriteOnly| QIODevice::Truncate))
+	{
+		// An error occurred. Ignore it.
+		qDebug("Failed to read instance group file.");
+		return;
+	}
+	QTextStream out(&groupFile);
+	QMap<QString, QSet<QString> > groupMap;
+	for(auto instance: m_instances)
+	{
+		QString id = instance->id();
+		QString group = instance->group();
+		if(group.isEmpty())
+			continue;
+		if(!groupMap.count(group))
+		{
+			QSet<QString> set;
+			set.insert(id);
+			groupMap[group] = set;
+		}
+		else
+		{
+			QSet<QString> &set = groupMap[group];
+			set.insert(id);
+		}
+	}
+	QJsonObject toplevel;
+	toplevel.insert("formatVersion",QJsonValue(QString("1")));
+	QJsonObject groupsArr;
+	for(auto iter = groupMap.begin(); iter != groupMap.end(); iter++)
+	{
+		auto list = iter.value();
+		auto name = iter.key();
+		QJsonObject groupObj;
+		QJsonArray instanceArr;
+		groupObj.insert("hidden",QJsonValue(QString("false")));
+		for(auto item: list)
+		{
+			instanceArr.append(QJsonValue(item));
+		}
+		groupObj.insert("instances",instanceArr);
+		groupsArr.insert(name,groupObj);
+	}
+	toplevel.insert("groups",groupsArr);
+	QJsonDocument doc(toplevel);
+	groupFile.write(doc.toJson(QJsonDocument::Indented));
+	groupFile.close();
+}
+
 void InstanceList::loadGroupList(QMap<QString, QString> & groupMap)
 {
 	QString groupFileName = m_instDir + "/instgroups.json";
@@ -176,12 +244,13 @@ InstanceList::InstListError InstanceList::loadList()
 			auto iter = groupMap.find(inst->id());
 			if(iter != groupMap.end())
 			{
-				inst->setGroup((*iter));
+				inst->setGroupInitial((*iter));
 			}
 			qDebug(QString("Loaded instance %1").arg(inst->name()).toUtf8());
 			inst->setParent(this);
 			m_instances.append(inst);
 			connect(instPtr, SIGNAL(propertiesChanged(BaseInstance*)),this, SLOT(propertiesChanged(BaseInstance*)));
+			connect(instPtr, SIGNAL(groupChanged()),this, SLOT(groupChanged()));
 		}
 	}
 	emit invalidated();
@@ -191,6 +260,7 @@ InstanceList::InstListError InstanceList::loadList()
 /// Clear all instances. Triggers notifications.
 void InstanceList::clear()
 {
+	saveGroupList();
 	m_instances.clear();
 	emit invalidated();
 };

logic/lists/InstanceList.h

@@ -26,13 +26,12 @@ class InstanceList : public QObject
 {
 	Q_OBJECT
 private:
-	/*!
-	 * \brief Get the instance groups
-	 */
 	void loadGroupList(QMap<QString, QString> & groupList);
+	void saveGroupList();
 	
 public:
 	explicit InstanceList(const QString &instDir, QObject *parent = 0);
+	virtual ~InstanceList();
 	
 	/*!
 	 * \brief Error codes returned by functions in the InstanceList class.
@@ -84,7 +83,7 @@ signals:
 	
 private slots:
 	void propertiesChanged(BaseInstance * inst);
-	
+	void groupChanged();
 protected:
 	QString m_instDir;
 	QList< InstancePtr > m_instances;