Split creates two of the same droplet

src/droplets/ad_droplet.cpp

@@ -20,7 +20,6 @@ void AD::Process(DacHandle::Channel chn,
   }
   
   if (*state == DropletState::kFull) {
-    //DrawSolidRect(patch, 30,30,40,40, true);
     attack = attack_param.Process();
     decay = decay_param.Process();
     curve = curve_param.Process();

src/main.cpp

@@ -6,7 +6,8 @@ int main(void) {
   patch.Init();
   sample_rate = patch.AudioSampleRate();
   selected_menu = left_menu;
-  droplet_left = GetDroplet(DropletState::kFull);
+  droplet_left = GetDroplet(DropletState::kFull,
+			    selected_menu->GetState());
  
   patch.StartAdc();
   patch.StartAudio(AudioThrough);
@@ -27,6 +28,7 @@ void ProcessControls() {
     // Handle menu selection
     if (patch.encoder.RisingEdge()) {
       selected_menu->SetInMenu(false);
+      selected_menu->Select();
       // Split selected
       if(selected_menu->GetState() == MenuState::kSplit) {
 	manager->ToggleSplit();
@@ -35,7 +37,8 @@ void ProcessControls() {
 	// Enable split
 	if (manager->GetSplitMode()) {
 	  droplet_left->UpdateState(DropletState::kLeft);
-	  droplet_right = GetDroplet(DropletState::kRight);
+	  droplet_right = GetDroplet(DropletState::kRight,
+				     left_menu->GetBufferState());
 	}
 	// Disable split
 	else {
@@ -56,14 +59,17 @@ void ProcessControls() {
 	if(manager->GetSplitMode()) {
 	  if (selected_menu == left_menu) {
 	    delete droplet_left;
-	    droplet_left = GetDroplet(DropletState::kLeft);
+	    droplet_left = GetDroplet(DropletState::kLeft,
+				      selected_menu->GetState());
 	  } else {
 	    delete droplet_right;
-	    droplet_right = GetDroplet(DropletState::kRight);
+	    droplet_right = GetDroplet(DropletState::kRight,
+				       selected_menu->GetState());
 	  }
 	} else {
 	  delete droplet_left;
-	  droplet_left = GetDroplet(DropletState::kFull);
+	  droplet_left = GetDroplet(DropletState::kFull,
+				    selected_menu->GetState());
 	}
       }
     }
@@ -112,8 +118,9 @@ static void AudioThrough(AudioHandle::InputBuffer in,
   }
 }
 
-Droplet* GetDroplet(DropletState state) {
-  switch(selected_menu->GetState()) {
+Droplet* GetDroplet(DropletState state,
+		    MenuState menu) {
+  switch(menu) {
   default:
   case MenuState::kAD:
     return new ADDroplet(&patch,

src/main.h

@@ -59,8 +59,9 @@ static void AudioThrough(AudioHandle::InputBuffer in,
  * Initializes a new audio processing droplet based on menu state.
  *
  * @param state new droplet state
+ * @param menu menu state
  * @return droplet
  */
-Droplet* GetDroplet(DropletState state);
+Droplet* GetDroplet(DropletState state, MenuState menu);
 
 #endif // DROPLETS_MAIN_H_

src/menu.cpp

@@ -109,6 +109,10 @@ MenuState Menu::GetState() {
   return highlighted->GetState();
 }
 
+MenuState Menu::GetBufferState() {
+  return buffer->GetState();
+}
+
 void Menu::UpdateMenuState() {
   if (manager->GetSplitMode()) {
     head->SetStateVisibility(MenuState::kChange, true);
@@ -118,3 +122,8 @@ void Menu::UpdateMenuState() {
     head->SetStateTitle(MenuState::kSplit, "Split");
   }
 }
+
+void Menu::Select() {
+  buffer = selected;
+  selected = highlighted;
+}

src/menu.h

@@ -85,10 +85,23 @@ class Menu {
    */
   MenuState GetState();
 
+  /*
+   * Returns the previously selected menu item.
+   *
+   * @return menu state
+   */
+  MenuState GetBufferState();
+
   /*
    * Updates the menu upon a split or a merge.
    */
   void UpdateMenuState();
+
+
+  /*
+   * Select the currently highlighted menu item.
+   */
+  void Select();
 };
 
 #endif // DROPLETS_MENU_H_