From 3c0b2c64e1a48a03070fe0e52304344115804777 Mon Sep 17 00:00:00 2001
From: Bruno Herbelin <bruno.herbelin@gmail.com>
Date: Tue, 24 May 2022 21:30:54 +0200
Subject: [PATCH] Added opposite action of 'Group all sources'

Mixer action ungroupAll expands all SessionGroupSources.
---
 Mixer.cpp                | 14 +++++++++++++-
 Mixer.h                  |  4 ++--
 UserInterfaceManager.cpp |  5 ++++-
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/Mixer.cpp b/Mixer.cpp
index d34c036..78e39e1 100644
--- a/Mixer.cpp
+++ b/Mixer.cpp
@@ -794,7 +794,19 @@ void Mixer::groupAll()
     }
 }
 
-void Mixer::flattenSession()
+void Mixer::ungroupAll()
+{
+    for (auto source_iter = session_->begin(); source_iter != session_->end(); source_iter++)
+    {
+        SessionGroupSource *ss = dynamic_cast< SessionGroupSource * >(*source_iter);
+
+        if ( ss != nullptr )
+            import(ss);
+
+    }
+}
+
+void Mixer::groupSession()
 {
     // new session group containing current session
     SessionGroupSource *sessiongroup = new SessionGroupSource;
diff --git a/Mixer.h b/Mixer.h
index f8e31b3..2388d4a 100644
--- a/Mixer.h
+++ b/Mixer.h
@@ -68,8 +68,8 @@ public:
     void deleteSelection  ();
     void groupSelection ();
     void groupAll ();
-
-    void flattenSession();
+    void ungroupAll ();
+    void groupSession ();
 
     // current source
     Source *currentSource ();
diff --git a/UserInterfaceManager.cpp b/UserInterfaceManager.cpp
index fcba39b..767f477 100644
--- a/UserInterfaceManager.cpp
+++ b/UserInterfaceManager.cpp
@@ -989,7 +989,10 @@ void UserInterface::showMenuFile()
         // switch pannel to show first source (created)
         navigator.showPannelSource(0);
     }
-    // TODO : FLATTEN (import all sources from all groups)
+    if (ImGuiToolkit::MenuItemIcon(7, 2, "Expand all groups", false, Mixer::manager().numSource() > 0)) {
+        // create a new group session with all sources
+        Mixer::manager().ungroupAll();
+    }
 
     // HELP AND QUIT
     ImGui::Separator();