From 6acc1fc112e9b8c020fd0b9c46694b1dc0185c9e Mon Sep 17 00:00:00 2001
From: Vojtech Bubnik <bubnikv@gmail.com>
Date: Tue, 6 Oct 2020 11:07:49 +0200
Subject: [PATCH] WIP: Opening a G-code in PrusaSlicer at Drag & Drop onto the
 application icon in Finder.

---
 src/slic3r/GUI/GUI_App.cpp | 20 +++++++++++++++++++-
 src/slic3r/GUI/GUI_App.hpp |  7 ++++++-
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 9ee4ca2ab..f15655e2b 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1620,20 +1620,38 @@ bool GUI_App::OnExceptionInMainLoop()
 }
 
 #ifdef __APPLE__
+void GUI_App::MacNewFile()
+{
+    wxDocManager::GetDocumentManager()->CreateNewDocument();
+    m_mac_initialized = true;
+}
 // wxWidgets override to get an event on open files.
 void GUI_App::MacOpenFiles(const wxArrayString &fileNames)
 {
     std::vector<std::string> files;
+    std::vector<wxString>    gcode_files;
     const std::regex pattern_gcode_drop(".*[.](gcode|g)", std::regex::icase);
     for (const auto& filename : fileNames) {
         boost::filesystem::path path(into_path(filename));
         if (std::regex_match(path.string(), pattern_gcode_drop))
-            start_new_gcodeviewer(&filename);
+            gcode_files.emplace_back(filename);
         else
             files.emplace_back(path.string());
     }
     if (! files.empty())
         this->plater()->load_files(files, true, true);
+    if (! files.empty() || m_mac_initialized) {
+        // Opening a G-code after the PrusaSlicer application was initalized.
+        // Start a new G-code viewer instance for each G-code file.
+        for (const wxString &filename : gcode_files)
+            start_new_gcodeviewer(&filename);
+    } else if (! gcode_files.empty()) {
+        assert(! m_mac_initialized);
+        // Drag & Dropping a G-code onto PrusaSlicer. Switch PrusaSlicer to G-code viewer mode.
+        //FIXME Switch application to G-code viewer mode?
+        wxMessageBox("PrusaSlicer on startup", wxString::Format("Switching to G-code viewer for %s", gcode_files.front()), wxICON_INFORMATION);
+    }
+    m_mac_initialized = true;
 }
 #endif /* __APPLE */
 
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index 68c9b2efd..53eef2518 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -106,6 +106,9 @@ private:
 #endif // ENABLE_GCODE_VIEWER
 
     bool            m_initialized { false };
+#ifdef __APPLE__
+    bool            m_mac_initialized { false };
+#endif // __APPLE__
     bool            app_conf_exists{ false };
 #if ENABLE_GCODE_VIEWER
     EAppMode        m_app_mode{ EAppMode::Editor };
@@ -119,7 +122,7 @@ private:
     wxFont		    m_bold_font;
 	wxFont			m_normal_font;
 
-    int          m_em_unit; // width of a "m"-symbol in pixels for current system font
+    int             m_em_unit; // width of a "m"-symbol in pixels for current system font
                                // Note: for 100% Scale m_em_unit = 10 -> it's a good enough coefficient for a size setting of controls
 
     std::unique_ptr<wxLocale> 	  m_wxLocale;
@@ -247,6 +250,8 @@ public:
     virtual bool OnExceptionInMainLoop() override;
 
 #ifdef __APPLE__
+    // Called if there is no file to open.
+    void            MacNewFile();
     // wxWidgets override to get an event on open files.
     void            MacOpenFiles(const wxArrayString &fileNames) override;
 #endif /* __APPLE */