From 37c21cfb13572d62179adcfdbe5113350a2dd906 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Wed, 20 May 2020 12:47:17 +0200
Subject: [PATCH] [skip ci] Port glib embedding example to Py3 and Gtk3

---
 src/Tools/embedded/glib/glib.cbp | 24 +++++++++----------
 src/Tools/embedded/glib/main.c   | 41 +++++++++++++++++++++-----------
 2 files changed, 38 insertions(+), 27 deletions(-)

diff --git a/src/Tools/embedded/glib/glib.cbp b/src/Tools/embedded/glib/glib.cbp
index 6616b1c644..792c93d9ee 100644
--- a/src/Tools/embedded/glib/glib.cbp
+++ b/src/Tools/embedded/glib/glib.cbp
@@ -13,19 +13,15 @@
 				<Option compiler="gcc" />
 				<Compiler>
 					<Add option="-g" />
-					<Add directory="/usr/include/python2.6" />
-					<Add directory="/usr/include/gtk-2.0/" />
+					<Add directory="/usr/include/python3.6m" />
+					<Add directory="/usr/include/gtk-3.0/" />
 					<Add directory="/usr/include/glib-2.0" />
-					<Add directory="/usr/lib/glib-2.0/include" />
+					<Add directory="/usr/lib/x86_64-linux-gnu/glib-2.0/include" />
 					<Add directory="/usr/include/cairo/" />
 					<Add directory="/usr/include/pango-1.0/" />
-					<Add directory="/usr/lib/gtk-2.0/include/" />
-					<Add directory="/usr/include/gtk-2.0/gdk/" />
+					<Add directory="/usr/include/gdk-pixbuf-2.0/" />
 					<Add directory="/usr/include/atk-1.0/" />
 				</Compiler>
-				<Linker>
-					<Add library="/usr/lib/libgtk-x11-2.0.so" />
-				</Linker>
 			</Target>
 			<Target title="Release">
 				<Option output="bin/Release/glib" prefix_auto="1" extension_auto="1" />
@@ -42,13 +38,15 @@
 		</Build>
 		<Compiler>
 			<Add option="-Wall" />
-			<Add option="`pkg-config gtk+-2.0 --cflags`" />
-			<Add directory="/usr/include/python2.6" />
+			<Add option="`pkg-config gtk+-3.0 --cflags`" />
+			<Add directory="/usr/include/gtk-3.0" />
 		</Compiler>
 		<Linker>
-			<Add option="`pkg-config gtk+-2.0 --libs`" />
-			<Add library="python2.6" />
-			<Add directory="/usr/lib" />
+			<Add option="`pkg-config gtk+-3.0 --libs`" />
+			<Add library="python3.6m" />
+			<Add library="glib-2.0" />
+			<Add library="gobject-2.0" />
+			<Add directory="/usr/lib/x86_64-linux-gnu/" />
 		</Linker>
 		<Unit filename="main.c">
 			<Option compilerVar="CC" />
diff --git a/src/Tools/embedded/glib/main.c b/src/Tools/embedded/glib/main.c
index 20eb5b0d0d..48bf601e73 100644
--- a/src/Tools/embedded/glib/main.c
+++ b/src/Tools/embedded/glib/main.c
@@ -12,24 +12,24 @@ static void helloWorld (GtkWidget *wid, GtkWidget *win)
     PyObject* result = PyRun_String("import FreeCADGui\n"
                                     "FreeCADGui.showMainWindow()",
                                     Py_file_input, dict, dict);
-    if (result) {
-        Py_DECREF(result);
-    }
-    else {
+    if (result) {
+        Py_DECREF(result);
+    }
+    else {
         PyObject *ptype, *pvalue, *ptrace;
         PyErr_Fetch(&ptype, &pvalue, &ptrace);
         PyObject* pystring = PyObject_Str(pvalue);
-        const char* error = PyString_AsString(pystring);
+        const char* error = PyUnicode_AsUTF8(pystring);
 
         GtkWidget *dialog = NULL;
-        dialog = gtk_message_dialog_new (GTK_WINDOW (win), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE, error);
+        dialog = gtk_message_dialog_new (GTK_WINDOW (win), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE, "%s", error);
         gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_CENTER);
         gtk_dialog_run (GTK_DIALOG (dialog));
         gtk_widget_destroy (dialog);
 
         Py_DECREF(pystring);
-    }
-    Py_DECREF(dict);
+    }
+    Py_DECREF(dict);
 }
 
 int main (int argc, char *argv[])
@@ -39,10 +39,21 @@ int main (int argc, char *argv[])
   GtkWidget *vbox = NULL;
 
   /* Init Python */
-  Py_SetProgramName(argv[0]);
-  PyEval_InitThreads();
+  wchar_t *program = Py_DecodeLocale(argv[0], NULL);
+  if (program == NULL) {
+    fprintf(stderr, "Fatal error: cannot decode argv[0]\n");
+    exit(1);
+  }
+
+  Py_SetProgramName(program);
   Py_Initialize();
-  PySys_SetArgv(argc, argv);
+  PyEval_InitThreads();
+
+  wchar_t *args[argc];
+  for (int i = 0; i < argc; i++) {
+    args[i] = Py_DecodeLocale(argv[i], NULL);
+  }
+  PySys_SetArgv(argc, args);
 
   /* Initialize GTK+ */
   g_log_set_handler ("Gtk", G_LOG_LEVEL_WARNING, (GLogFunc) gtk_false, NULL);
@@ -58,14 +69,16 @@ int main (int argc, char *argv[])
   g_signal_connect (win, "destroy", gtk_main_quit, NULL);
 
   /* Create a vertical box with buttons */
-  vbox = gtk_vbox_new (TRUE, 6);
+  vbox = gtk_box_new (TRUE, 6);
   gtk_container_add (GTK_CONTAINER (win), vbox);
 
-  button = gtk_button_new_from_stock (GTK_STOCK_DIALOG_INFO);
+  button = gtk_button_new_from_icon_name ("document-open", GTK_ICON_SIZE_BUTTON);
+  gtk_button_set_label((GtkButton*)button, "Load module");
   g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (helloWorld), (gpointer) win);
   gtk_box_pack_start (GTK_BOX (vbox), button, TRUE, TRUE, 0);
 
-  button = gtk_button_new_from_stock (GTK_STOCK_CLOSE);
+  button = gtk_button_new_from_icon_name ("window-close", GTK_ICON_SIZE_BUTTON);
+  gtk_button_set_label((GtkButton*)button, "Close");
   g_signal_connect (button, "clicked", gtk_main_quit, NULL);
   gtk_box_pack_start (GTK_BOX (vbox), button, TRUE, TRUE, 0);