Main: add single-instance checking.

src/SaveTool/SaveTool.cpp

@@ -145,6 +145,7 @@ SaveTool::SaveTool(const Arguments& arguments):
 SaveTool::~SaveTool() {
     SDL_RemoveTimer(_gameCheckTimerId);
 
+    _conf.setValue("cheat_mode", _cheatMode);
     _conf.setValue("unsafe_mode", _unsafeMode);
     _conf.setValue("startup_update_check", _checkUpdatesOnStartup);
     _conf.save();
@@ -357,6 +358,13 @@ void SaveTool::updateCheckEvent(SDL_Event& event) {
 }
 
 void SaveTool::initialiseConfiguration() {
+    if(_conf.hasValue("cheat_mode")) {
+        _cheatMode = _conf.value<bool>("cheat_mode");
+    }
+    else {
+        _conf.setValue("cheat_mode", _cheatMode);
+    }
+
     if(_conf.hasValue("unsafe_mode")) {
         _unsafeMode = _conf.value<bool>("unsafe_mode");
     }

src/SaveTool/SaveTool.h

@@ -204,4 +204,6 @@ class SaveTool: public Platform::Sdl2Application, public efsw::FileWatchListener
         std::string _latestVersion;
         std::string _releaseLink;
         std::string _downloadLink;
+
+        bool _cheatMode{false};
 };

src/SaveTool/SaveTool_MainManager.cpp

@@ -231,6 +231,10 @@ void SaveTool::drawGeneralInfo() {
         }
     }
 
+    if(!_cheatMode) {
+        return;
+    }
+
     ImGui::SameLine();
 
     static Int credits;
@@ -295,30 +299,32 @@ void SaveTool::drawResearchInventory() {
         ImGui::TableSetColumnIndex(1); \
         ImGui::TextDisabled("Unavailable as of M.A.S.S. Builder version " SUPPORTED_GAME_VERSION);
 
-    #define matRow(name, var, getter, setter)                                                 \
-        ImGui::TableNextRow();                                                                \
-        ImGui::TableSetColumnIndex(0);                                                        \
-        ImGui::TextUnformatted((name));                                                       \
-        ImGui::TableSetColumnIndex(1);                                                        \
-        if(_currentProfile->getter() != -1) {                                                 \
-            drawUnsafeText("%i", _currentProfile->getter());                                  \
-            ImGui::TableSetColumnIndex(2);                                                    \
-            ImGui::PushID(#setter);                                                           \
-            static Int var = _currentProfile->getter();                                       \
-            if(drawUnsafeWidget([]{ return ImGui::SmallButton(ICON_FA_EDIT); })) {            \
-                (var) = _currentProfile->getter();                                            \
-                ImGui::OpenPopup("int_edit");                                                 \
-            }                                                                                 \
-            if(drawIntEditPopup(&(var), 9999)) {                                              \
-                if(!_currentProfile->set##setter((var))) {                                    \
-                    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error",                   \
-                                             _currentProfile->lastError().c_str(), window()); \
-                }                                                                             \
-            }                                                                                 \
-            ImGui::PopID();                                                                   \
-        }                                                                                     \
-        else {                                                                                \
-            ImGui::TextDisabled("Not found in the save file");                                \
+    #define matRow(name, var, getter, setter)                                                     \
+        ImGui::TableNextRow();                                                                    \
+        ImGui::TableSetColumnIndex(0);                                                            \
+        ImGui::TextUnformatted((name));                                                           \
+        ImGui::TableSetColumnIndex(1);                                                            \
+        if(_currentProfile->getter() != -1) {                                                     \
+            ImGui::Text("%i", _currentProfile->getter());                                         \
+            if(_cheatMode) {                                                                      \
+                ImGui::TableSetColumnIndex(2);                                                    \
+                ImGui::PushID(#setter);                                                           \
+                static Int var = _currentProfile->getter();                                       \
+                if(drawUnsafeWidget([]{ return ImGui::SmallButton(ICON_FA_EDIT); })) {            \
+                    (var) = _currentProfile->getter();                                            \
+                    ImGui::OpenPopup("int_edit");                                                 \
+                }                                                                                 \
+                if(drawIntEditPopup(&(var), 9999)) {                                              \
+                    if(!_currentProfile->set##setter((var))) {                                    \
+                        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error",                   \
+                                                 _currentProfile->lastError().c_str(), window()); \
+                    }                                                                             \
+                }                                                                                 \
+                ImGui::PopID();                                                                   \
+            }                                                                                     \
+        }                                                                                         \
+        else {                                                                                    \
+            ImGui::TextDisabled("Not found in the save file");                                    \
         }
 
     if(ImGui::BeginTable("##ResearchInventoryTable", 3,

src/SaveTool/SaveTool_drawMainMenu.cpp

@@ -55,8 +55,15 @@ void SaveTool::drawMainMenu() {
             ImGui::Separator();
 
             if(ImGui::BeginMenu(ICON_FA_COG " Settings")) {
+                ImGui::Checkbox("Cheat mode", &_cheatMode);
+                ImGui::SameLine();
+                ImGui::AlignTextToFramePadding();
+                drawHelpMarker("This gives access to save edition features that can be considered cheats.",
+                               Float(windowSize().x()) * 0.4f);
+
                 ImGui::Checkbox("Unsafe mode", &_unsafeMode);
                 ImGui::SameLine();
+                ImGui::AlignTextToFramePadding();
                 drawHelpMarker("This allows changing the state of save files in the game's save folder even when the game is running.",
                                Float(windowSize().x()) * 0.4f);
 

src/main.cpp

@@ -18,7 +18,25 @@
 
 #include <fstream>
 
+#include <errhandlingapi.h>
+#include <synchapi.h>
+#include <winerror.h>
+
 int main(int argc, char** argv) {
+    void* mutex_handle = CreateMutexW(nullptr, 0, L"MassBuilderSaveTool");
+
+    if(!mutex_handle) {
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error initialising the app",
+                                 "There was an error initialising the mutex.",nullptr);
+        return EXIT_FAILURE;
+    }
+
+    if(GetLastError() == ERROR_ALREADY_EXISTS) {
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error initialising the app",
+                                 "There can be only one running instance of the application.",nullptr);
+        return EXIT_FAILURE;
+    }
+
 #ifndef SAVETOOL_DEBUG_BUILD
     std::ofstream output{"SaveToolLog.txt", std::ios::trunc|std::ios::out};
 
@@ -28,5 +46,9 @@ int main(int argc, char** argv) {
 #endif
 
     SaveTool app({argc, argv});
-    return app.exec();
+    Int result = app.exec();
+
+    ReleaseMutex(mutex_handle);
+
+    return result;
 }