single slicer instance

check for other instances during startup
send message with command line arguments if found and terminate
listen for those messages and load objects from paths in messages from them

CMakeLists.txt

@@ -160,6 +160,9 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
     # Boost on Raspberry-Pi does not link to pthreads.
     set(THREADS_PREFER_PTHREAD_FLAG ON)
     find_package(Threads REQUIRED)
+
+    find_package(DBus REQUIRED)
+    include_directories(${DBUS_INCLUDE_DIRS})
 endif()
 
 if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUXX)

cmake/modules/FindDBus.cmake

@@ -0,0 +1,59 @@
+# - Try to find DBus
+# Once done, this will define
+#
+#  DBUS_FOUND - system has DBus
+#  DBUS_INCLUDE_DIRS - the DBus include directories
+#  DBUS_LIBRARIES - link these to use DBus
+#
+# Copyright (C) 2012 Raphael Kubo da Costa <[email protected]>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1.  Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+# 2.  Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
+# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FIND_PACKAGE(PkgConfig)
+PKG_CHECK_MODULES(PC_DBUS QUIET dbus-1)
+
+FIND_LIBRARY(DBUS_LIBRARIES
+    NAMES dbus-1
+    HINTS ${PC_DBUS_LIBDIR}
+          ${PC_DBUS_LIBRARY_DIRS}
+)
+
+FIND_PATH(DBUS_INCLUDE_DIR
+    NAMES dbus/dbus.h
+    HINTS ${PC_DBUS_INCLUDEDIR}
+          ${PC_DBUS_INCLUDE_DIRS}
+)
+
+GET_FILENAME_COMPONENT(_DBUS_LIBRARY_DIR ${DBUS_LIBRARIES} PATH)
+FIND_PATH(DBUS_ARCH_INCLUDE_DIR
+    NAMES dbus/dbus-arch-deps.h
+    HINTS ${PC_DBUS_INCLUDEDIR}
+          ${PC_DBUS_INCLUDE_DIRS}
+          ${_DBUS_LIBRARY_DIR}
+          ${DBUS_INCLUDE_DIR}
+    PATH_SUFFIXES include
+)
+
+SET(DBUS_INCLUDE_DIRS ${DBUS_INCLUDE_DIR} ${DBUS_ARCH_INCLUDE_DIR})
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(DBUS REQUIRED_VARS DBUS_INCLUDE_DIRS DBUS_LIBRARIES)

src/PrusaSlicer.cpp

@@ -51,13 +51,14 @@
     #include "slic3r/GUI/GUI.hpp"
     #include "slic3r/GUI/GUI_App.hpp"
     #include "slic3r/GUI/3DScene.hpp"
+    #include "slic3r/GUI/InstanceCheck.hpp" 
+    #include "slic3r/GUI/AppConfig.hpp" 
 #endif /* SLIC3R_GUI */
 
 using namespace Slic3r;
 
 int CLI::run(int argc, char **argv)
 {
-
 #ifdef __WXGTK__
     // On Linux, wxGTK has no support for Wayland, and the app crashes on
     // startup if gtk3 is used. This env var has to be set explicitly to
@@ -524,6 +525,16 @@ int CLI::run(int argc, char **argv)
 #ifdef SLIC3R_GUI
 // #ifdef USE_WX
         GUI::GUI_App *gui = new GUI::GUI_App();
+
+		bool gui_single_instance_setting = gui->app_config->get("single_instance") == "1";
+		if (Slic3r::instance_check(argc, argv, gui_single_instance_setting)) {
+			//TODO: do we have delete gui and other stuff?
+			return -1;
+		}
+
+		//gui->app_config = app_config;
+		//app_config = nullptr;
+
 //		gui->autosave = m_config.opt_string("autosave");
         GUI::GUI_App::SetInstance(gui);
         gui->CallAfter([gui, this, &load_configs] {

src/PrusaSlicer_app_msvc.cpp

@@ -7,6 +7,8 @@
 #include <shellapi.h>
 #include <wchar.h>
 
+
+
 #ifdef SLIC3R_GUI
 extern "C"
 {
@@ -216,7 +218,6 @@ int APIENTRY wWinMain(HINSTANCE /* hInstance */, HINSTANCE /* hPrevInstance */,
 int wmain(int argc, wchar_t **argv)
 {
 #endif
-
     std::vector<wchar_t*> argv_extended;
     argv_extended.emplace_back(argv[0]);
 

src/libslic3r/PrintConfig.cpp

@@ -39,6 +39,11 @@ void PrintConfigDef::init_common_params()
 {
     ConfigOptionDef* def;
 
+	def = this->add("single_instance", coBool);
+	def->label = L("Single Instance");
+	def->mode = comAdvanced;
+	def->set_default_value(new ConfigOptionBool(false));
+
     def = this->add("printer_technology", coEnum);
     def->label = L("Printer technology");
     def->tooltip = L("Printer technology");

src/slic3r/CMakeLists.txt

@@ -161,6 +161,8 @@ set(SLIC3R_GUI_SOURCES
     GUI/DoubleSlider.hpp
     GUI/ObjectDataViewModel.cpp
     GUI/ObjectDataViewModel.hpp
+    GUI/InstanceCheck.cpp
+    GUI/InstanceCheck.hpp
     Utils/Http.cpp
     Utils/Http.hpp
     Utils/FixModelByWin10.cpp
@@ -195,6 +197,8 @@ if (APPLE)
             GUI/RemovableDriveManagerMM.mm
             GUI/RemovableDriveManagerMM.h
             GUI/Mouse3DHandlerMac.mm
+            GUI/InstanceCheckMac.mm
+            GUI/InstanceCheckMac.h
         )
     FIND_LIBRARY(DISKARBITRATION_LIBRARY DiskArbitration)
 
@@ -206,6 +210,10 @@ encoding_check(libslic3r_gui)
 
 target_link_libraries(libslic3r_gui libslic3r avrdude cereal imgui GLEW::GLEW OpenGL::GL OpenGL::GLU hidapi libcurl ${wxWidgets_LIBRARIES})
 
+if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    target_link_libraries(libslic3r_gui ${DBUS_LIBRARIES}) 
+endif()
+
 if(APPLE)
     target_link_libraries(libslic3r_gui ${DISKARBITRATION_LIBRARY})
 endif()

src/slic3r/GUI/AppConfig.cpp

@@ -69,6 +69,9 @@ void AppConfig::set_defaults()
         set("use_retina_opengl", "1");
 #endif
 
+	if (get("single_instance").empty())
+		set("single_instance", "0");
+
     if (get("remember_output_path").empty())
         set("remember_output_path", "1");
 

src/slic3r/GUI/GUI_App.cpp

@@ -50,6 +50,7 @@
 #include "UpdateDialogs.hpp"
 #include "Mouse3DController.hpp"
 #include "RemovableDriveManager.hpp"
+#include "InstanceCheck.hpp"
 
 #ifdef __WXMSW__
 #include <dbt.h>
@@ -209,6 +210,17 @@ static void register_win32_device_notification_event()
 		}
         return false;
     });
+
+	wxWindow::MSWRegisterMessageHandler(WM_COPYDATA, [](wxWindow* win, WXUINT /* nMsg */, WXWPARAM wParam, WXLPARAM lParam) {
+
+		COPYDATASTRUCT* copy_data_structure = { 0 };
+		copy_data_structure = (COPYDATASTRUCT*)lParam;
+		if (copy_data_structure->dwData == 1) {
+			LPCWSTR arguments = (LPCWSTR)copy_data_structure->lpData;
+			Slic3r::GUI::wxGetApp().other_instance_message_handler()->handle_message(boost::nowide::narrow(arguments));
+		}
+		return true;
+		});
 }
 #endif // WIN32
 
@@ -253,7 +265,11 @@ GUI_App::GUI_App()
     , m_imgui(new ImGuiWrapper())
     , m_wizard(nullptr)
 	, m_removable_drive_manager(std::make_unique<RemovableDriveManager>())
-{}
+	, m_other_instance_message_handler(std::make_unique<OtherInstanceMessageHandler>())
+{
+	//app config initializes early becasuse it is used in instance checking in PrusaSlicer.cpp
+	this->init_app_config();
+}
 
 GUI_App::~GUI_App()
 {
@@ -284,6 +300,30 @@ bool GUI_App::init_opengl()
 }
 #endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
+void GUI_App::init_app_config()
+{
+	// Profiles for the alpha are stored into the PrusaSlicer-alpha directory to not mix with the current release.
+	SetAppName(SLIC3R_APP_KEY);
+	//SetAppName(SLIC3R_APP_KEY "-beta");
+	SetAppDisplayName(SLIC3R_APP_NAME);
+
+	// Set the Slic3r data directory at the Slic3r XS module.
+	// Unix: ~/ .Slic3r
+	// Windows : "C:\Users\username\AppData\Roaming\Slic3r" or "C:\Documents and Settings\username\Application Data\Slic3r"
+	// Mac : "~/Library/Application Support/Slic3r"
+
+	if (data_dir().empty())
+		set_data_dir(wxStandardPaths::Get().GetUserDataDir().ToUTF8().data());
+
+	if (!app_config)
+		app_config = new AppConfig();
+
+	// load settings
+	app_conf_exists = app_config->exists();
+	if (app_conf_exists) {
+		app_config->load();
+	}
+}
 bool GUI_App::OnInit()
 {
     try {
@@ -301,34 +341,14 @@ bool GUI_App::on_init_inner()
     wxCHECK_MSG(wxDirExists(resources_dir), false,
         wxString::Format("Resources path does not exist or is not a directory: %s", resources_dir));
 
-    // Profiles for the alpha are stored into the PrusaSlicer-alpha directory to not mix with the current release.
-    SetAppName(SLIC3R_APP_KEY);
-//    SetAppName(SLIC3R_APP_KEY "-beta");
-    SetAppDisplayName(SLIC3R_APP_NAME);
-
-// Enable this to get the default Win32 COMCTRL32 behavior of static boxes.
+     // Enable this to get the default Win32 COMCTRL32 behavior of static boxes.
 //    wxSystemOptions::SetOption("msw.staticbox.optimized-paint", 0);
-// Enable this to disable Windows Vista themes for all wxNotebooks. The themes seem to lead to terrible
-// performance when working on high resolution multi-display setups.
+    // Enable this to disable Windows Vista themes for all wxNotebooks. The themes seem to lead to terrible
+    // performance when working on high resolution multi-display setups.
 //    wxSystemOptions::SetOption("msw.notebook.themed-background", 0);
 
 //     Slic3r::debugf "wxWidgets version %s, Wx version %s\n", wxVERSION_STRING, wxVERSION;
-
-    // Set the Slic3r data directory at the Slic3r XS module.
-    // Unix: ~/ .Slic3r
-    // Windows : "C:\Users\username\AppData\Roaming\Slic3r" or "C:\Documents and Settings\username\Application Data\Slic3r"
-    // Mac : "~/Library/Application Support/Slic3r"
-    if (data_dir().empty())
-        set_data_dir(wxStandardPaths::Get().GetUserDataDir().ToUTF8().data());
-
-    app_config = new AppConfig();
-
-    // load settings
-    app_conf_exists = app_config->exists();
-    if (app_conf_exists) {
-        app_config->load();
-    }
-
+
     std::string msg = Http::tls_global_init();
     wxRichMessageDialog
         dlg(nullptr,
@@ -407,6 +427,8 @@ bool GUI_App::on_init_inner()
         if (! plater_)
             return;
 
+		//m_other_instance_message_handler->report();
+
         if (app_config->dirty() && app_config->get("autosave") == "1")
             app_config->save();
 

src/slic3r/GUI/GUI_App.hpp

@@ -35,6 +35,7 @@ class PrintHostJobQueue;
 
 namespace GUI{
 class RemovableDriveManager;
+class OtherInstanceMessageHandler;
 enum FileType
 {
     FT_STL,
@@ -108,7 +109,7 @@ class GUI_App : public wxApp
     std::unique_ptr<ImGuiWrapper> m_imgui;
     std::unique_ptr<PrintHostJobQueue> m_printhost_job_queue;
     ConfigWizard* m_wizard;    // Managed by wxWindow tree
-
+	std::unique_ptr <OtherInstanceMessageHandler> m_other_instance_message_handler;
 public:
     bool            OnInit() override;
     bool            initialized() const { return m_initialized; }
@@ -196,6 +197,7 @@ class GUI_App : public wxApp
     std::vector<Tab *>      tabs_list;
 
 	RemovableDriveManager* removable_drive_manager() { return m_removable_drive_manager.get(); }
+	OtherInstanceMessageHandler* other_instance_message_handler() { return m_other_instance_message_handler.get(); }
 
     ImGuiWrapper* imgui() { return m_imgui.get(); }
 
@@ -211,6 +213,7 @@ class GUI_App : public wxApp
 
 private:
     bool            on_init_inner();
+	void            init_app_config();
     void            window_pos_save(wxTopLevelWindow* window, const std::string &name);
     void            window_pos_restore(wxTopLevelWindow* window, const std::string &name, bool default_maximized = false);
     void            window_pos_sanitize(wxTopLevelWindow* window);