3 files changed, 46 insertions, 9 deletions

diff --git a/api/logic/minecraft/MinecraftInstance.cpp b/api/logic/minecraft/MinecraftInstance.cpp
index 35f692c4..617d7431 100644
--- a/api/logic/minecraft/MinecraftInstance.cpp
+++ b/api/logic/minecraft/MinecraftInstance.cpp
@@ -897,8 +897,9 @@ std::shared_ptr<SimpleModList> MinecraftInstance::loaderModList() const
     if (!m_loader_mod_list)
     {
         m_loader_mod_list.reset(new SimpleModList(loaderModsDir()));
+        m_loader_mod_list->disableInteraction(isRunning());
+        connect(this, &BaseInstance::runningStatusChanged, m_loader_mod_list.get(), &SimpleModList::disableInteraction);
     }
-    m_loader_mod_list->update();
     return m_loader_mod_list;
 }
 
@@ -907,8 +908,9 @@ std::shared_ptr<SimpleModList> MinecraftInstance::coreModList() const
     if (!m_core_mod_list)
     {
         m_core_mod_list.reset(new SimpleModList(coreModsDir()));
+        m_core_mod_list->disableInteraction(isRunning());
+        connect(this, &BaseInstance::runningStatusChanged, m_core_mod_list.get(), &SimpleModList::disableInteraction);
     }
-    m_core_mod_list->update();
     return m_core_mod_list;
 }
 
@@ -917,8 +919,9 @@ std::shared_ptr<SimpleModList> MinecraftInstance::resourcePackList() const
     if (!m_resource_pack_list)
     {
         m_resource_pack_list.reset(new SimpleModList(resourcePacksDir()));
+        m_resource_pack_list->disableInteraction(isRunning());
+        connect(this, &BaseInstance::runningStatusChanged, m_resource_pack_list.get(), &SimpleModList::disableInteraction);
     }
-    m_resource_pack_list->update();
     return m_resource_pack_list;
 }
 
@@ -927,8 +930,9 @@ std::shared_ptr<SimpleModList> MinecraftInstance::texturePackList() const
     if (!m_texture_pack_list)
     {
         m_texture_pack_list.reset(new SimpleModList(texturePacksDir()));
+        m_texture_pack_list->disableInteraction(isRunning());
+        connect(this, &BaseInstance::runningStatusChanged, m_texture_pack_list.get(), &SimpleModList::disableInteraction);
     }
-    m_texture_pack_list->update();
     return m_texture_pack_list;
 }
 
diff --git a/api/logic/minecraft/SimpleModList.cpp b/api/logic/minecraft/SimpleModList.cpp
index 6f4011a9..bdcf01b7 100644
--- a/api/logic/minecraft/SimpleModList.cpp
+++ b/api/logic/minecraft/SimpleModList.cpp
@@ -86,6 +86,17 @@ bool SimpleModList::update()
     return true;
 }
 
+void SimpleModList::disableInteraction(bool disabled)
+{
+    if (interaction_disabled == disabled) {
+        return;
+    }
+    interaction_disabled = disabled;
+    if(size()) {
+        emit dataChanged(index(0), index(size() - 1));
+    }
+}
+
 void SimpleModList::directoryChanged(QString path)
 {
     update();
@@ -99,6 +110,10 @@ bool SimpleModList::isValid()
 // FIXME: this does not take disabled mod (with extra .disable extension) into account...
 bool SimpleModList::installMod(const QString &filename)
 {
+    if(interaction_disabled) {
+        return false;
+    }
+
     // NOTE: fix for GH-1178: remove trailing slash to avoid issues with using the empty result of QFileInfo::fileName
     auto originalPath = FS::NormalizePath(filename);
     QFileInfo fileinfo(originalPath);
@@ -177,6 +192,10 @@ bool SimpleModList::installMod(const QString &filename)
 
 bool SimpleModList::enableMods(const QModelIndexList& indexes, bool enable)
 {
+    if(interaction_disabled) {
+        return false;
+    }
+
     if(indexes.isEmpty())
         return true;
 
@@ -192,6 +211,10 @@ bool SimpleModList::enableMods(const QModelIndexList& indexes, bool enable)
 
 bool SimpleModList::deleteMods(const QModelIndexList& indexes)
 {
+    if(interaction_disabled) {
+        return false;
+    }
+
     if(indexes.isEmpty())
         return true;
 
@@ -313,11 +336,17 @@ QVariant SimpleModList::headerData(int section, Qt::Orientation orientation, int
 Qt::ItemFlags SimpleModList::flags(const QModelIndex &index) const
 {
     Qt::ItemFlags defaultFlags = QAbstractListModel::flags(index);
-    if (index.isValid())
-        return Qt::ItemIsUserCheckable | Qt::ItemIsDropEnabled |
-               defaultFlags;
-    else
-        return Qt::ItemIsDropEnabled | defaultFlags;
+    auto flags = defaultFlags;
+    if(index.isValid()) {
+        if(interaction_disabled) {
+            flags &= ~Qt::ItemIsDropEnabled;
+            flags &= ~Qt::ItemIsUserCheckable;
+        } else {
+            flags |= Qt::ItemIsUserCheckable;
+            flags |= Qt::ItemIsDropEnabled;
+        }
+    }
+    return flags;
 }
 
 Qt::DropActions SimpleModList::supportedDropActions() const
diff --git a/api/logic/minecraft/SimpleModList.h b/api/logic/minecraft/SimpleModList.h
index 3ed2edfe..8cb57727 100644
--- a/api/logic/minecraft/SimpleModList.h
+++ b/api/logic/minecraft/SimpleModList.h
@@ -106,6 +106,9 @@ public:
         return mods;
     }
 
+public slots:
+    void disableInteraction(bool disabled);
+
 private
 slots:
     void directoryChanged(QString path);
@@ -116,6 +119,7 @@ signals:
 protected:
     QFileSystemWatcher *m_watcher;
     bool is_watching = false;
+    bool interaction_disabled = false;
     QDir m_dir;
     QList<Mod> mods;
 };