From c4614bff306606207719654973061fc5140fbef8 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 17 May 2022 01:42:21 -0500
Subject: [PATCH] GUI: implement "clear all subsongs"

---
 src/engine/engine.cpp | 10 ++++++++++
 src/engine/engine.h   |  3 +++
 src/gui/gui.cpp       |  5 +----
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 9fcb85008..dd5473f38 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -813,6 +813,16 @@ bool DivEngine::removeSubSong(int index) {
   return true;
 }
 
+void DivEngine::clearSubSongs() {
+  BUSY_BEGIN;
+  saveLock.lock();
+  song.clearSongData();
+  changeSong(0);
+  curOrder=0;
+  saveLock.unlock();
+  BUSY_END;
+}
+
 void DivEngine::changeSystem(int index, DivSystem which, bool preserveOrder) {
   int chanCount=chans;
   quitDispatch();
diff --git a/src/engine/engine.h b/src/engine/engine.h
index a6e502953..895d288e4 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -821,6 +821,9 @@ class DivEngine {
     // remove subsong
     bool removeSubSong(int index);
 
+    // clear all subsong data
+    void clearSubSongs();
+
     // change system
     void changeSystem(int index, DivSystem which, bool preserveOrder=true);
 
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 56e9f0e76..788850662 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -3494,10 +3494,7 @@ bool FurnaceGUI::loop() {
         case GUI_WARN_CLEAR:
           if (ImGui::Button("All subsongs")) {
             stop();
-            //e->lockEngine([this]() {
-              //e->curSubSong->clearData();
-            //});
-            e->setOrder(0);
+            e->clearSubSongs();
             curOrder=0;
             oldOrder=0;
             oldOrder1=0;