Droplet switch menu names

src/droplets/droplet_manager.cpp

@@ -15,3 +15,15 @@ void DropletManager::SetSelected(DropletState state) {
 DropletState DropletManager::GetSelected() {
   return selected_drop;
 }
+
+std::string DropletManager::OtherStateName(DropletState state) {
+  switch (state) {
+  case DropletState::kLeft:
+    return "Right";
+  case DropletState::kRight:
+    return "Left";
+  case DropletState::kFull:
+  default:
+    return "";
+  }
+}

src/droplets/droplet_manager.h

@@ -35,6 +35,14 @@ public:
    * @return selected droplet
    */
   DropletState GetSelected();
+
+  /*
+   * Returns the name of the other droplet
+   *
+   * @param state droplat state of the current
+   * @return other droplet name
+   */
+  std::string OtherStateName(DropletState state);
 };
 
 #endif // CASCADE_DROPLETS_DROPLET_MANAGER_H_