Implement NSM :optional-gui:

Signed-off-by: falkTX <falktx@falktx.com>

source/backend/CarlaStandaloneNSM.cpp

@@ -22,8 +22,8 @@
 #define NSM_API_VERSION_MAJOR 1
 #define NSM_API_VERSION_MINOR 2
 
-#define NSM_CLIENT_FEATURES ":switch:"
-//#define NSM_CLIENT_FEATURES ":switch:optional-gui:"
+// #define NSM_CLIENT_FEATURES ":switch:"
+#define NSM_CLIENT_FEATURES ":switch:optional-gui:"
 
 #include "CarlaOscUtils.hpp"
 #include "CarlaString.hpp"

source/frontend/carla_host.py

@@ -2404,6 +2404,10 @@ class HostWindow(QMainWindow):
 
         # Hide Optional Gui
         elif opcode == NSM_CALLBACK_HIDE_OPTIONAL_GUI:
+            for pitem in reversed(self.fPluginList):
+                if pitem is None:
+                    continue
+                widget = pitem.getWidget().hideCustomUI()
             self.hide()
 
         self.host.nsm_ready(opcode)

source/frontend/carla_skin.py

@@ -790,6 +790,12 @@ class AbstractPluginSlot(QFrame, PluginEditParentMeta):
         if self.b_gui is not None:
             self.b_gui.setChecked(True)
 
+    def hideCustomUI(self):
+        self.host.show_custom_ui(self.fPluginId, False)
+
+        if self.b_gui is not None:
+            self.b_gui.setChecked(False)
+
     def showEditDialog(self):
         self.fEditDialog.show()
         self.fEditDialog.activateWindow()