GH-1556 disable export for tracked FTB instances

application/MainWindow.cpp

@@ -1630,6 +1630,7 @@ void MainWindow::instanceChanged(const QModelIndex &current, const QModelIndex &
 		ui->instanceToolBar->setEnabled(true);
 		ui->actionLaunchInstance->setEnabled(m_selectedInstance->canLaunch());
 		ui->actionLaunchInstanceOffline->setEnabled(m_selectedInstance->canLaunch());
+		ui->actionExportInstance->setEnabled(m_selectedInstance->canExport());
 		renameButton->setText(m_selectedInstance->name());
 		m_statusLeft->setText(m_selectedInstance->getStatusbarDescription());
 		updateInstanceToolIcon(m_selectedInstance->iconKey());

logic/BaseInstance.h

@@ -206,6 +206,7 @@ public:
 	void unsetFlag(const InstanceFlag flag);
 
 	bool canLaunch() const;
+	virtual bool canExport() const = 0;
 
 	virtual bool reload();
 

logic/NullInstance.h

@@ -83,4 +83,8 @@ public:
 	{
 		return "Null";
 	}
+	bool canExport() const override
+	{
+		return false;
+	}
 };

logic/minecraft/ftb/LegacyFTBInstance.h

@@ -10,4 +10,8 @@ public:
 	virtual QString id() const;
 	virtual void copy(const QDir &newDir);
 	virtual QString typeName() const;
+	bool canExport() const override
+	{
+		return false;
+	}
 };

logic/minecraft/ftb/OneSixFTBInstance.h

@@ -21,7 +21,10 @@ public:
 	QDir versionsPath() const override;
 	bool providesVersionFile() const override;
 	virtual QString typeName() const override;
-
+	bool canExport() const override
+	{
+		return false;
+	}
 private:
 	SettingsObjectPtr m_globalSettings;
 };

logic/minecraft/legacy/LegacyInstance.h

@@ -124,6 +124,11 @@ public:
 
 	virtual QString typeName() const override;
 
+	bool canExport() const override
+	{
+		return true;
+	}
+
 protected:
 	mutable std::shared_ptr<ModList> jar_mod_list;
 	mutable std::shared_ptr<ModList> core_mod_list;

logic/minecraft/onesix/OneSixInstance.h

@@ -94,6 +94,11 @@ public:
 
 	virtual QString typeName() const override;
 
+	bool canExport() const override
+	{
+		return true;
+	}
+
 signals:
 	void versionReloaded();