From 03eb0554640b76b07fe8c3bdcb00f06e50c5bae4 Mon Sep 17 00:00:00 2001
From: Stepland <10530295-Buggyroom@users.noreply.gitlab.com>
Date: Sat, 8 Jul 2023 15:58:11 +0200
Subject: [PATCH] Only show the very first BPM in the Adjust Sync Menu

---
 src/better_timing.cpp |  8 ++++++++
 src/better_timing.hpp |  3 +++
 src/editor_state.cpp  | 17 ++++++++++-------
 3 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/src/better_timing.cpp b/src/better_timing.cpp
index f086627..848f891 100644
--- a/src/better_timing.cpp
+++ b/src/better_timing.cpp
@@ -243,6 +243,14 @@ namespace better {
         return Timing{{{bpm, 0}}, -1 * offset};
     };
 
+    Timing::keys_by_beats_type::const_iterator Timing::cbegin() const {
+        return events_by_beats.cbegin();
+    }
+
+    Timing::keys_by_beats_type::const_iterator Timing::cend() const {
+        return events_by_beats.cend();
+    }
+
     void Timing::reconstruct(const std::vector<BPMAtBeat>& events, const Decimal& offset) {
         reload_events_from(events);
         set_offset(offset);
diff --git a/src/better_timing.hpp b/src/better_timing.hpp
index eac0404..3d8319d 100644
--- a/src/better_timing.hpp
+++ b/src/better_timing.hpp
@@ -93,6 +93,9 @@ namespace better {
 
         static Timing load_from_memon_1_0_0(const nlohmann::json& json);
         static Timing load_from_memon_legacy(const nlohmann::json& metadata);
+
+        keys_by_beats_type::const_iterator cbegin() const;
+        keys_by_beats_type::const_iterator cend() const;
         
         template<typename Callback>
         void for_each_event_between(const Fraction& first, const Fraction& last, const Callback& cb) const {
diff --git a/src/editor_state.cpp b/src/editor_state.cpp
index 607e09f..8e6f90c 100644
--- a/src/editor_state.cpp
+++ b/src/editor_state.cpp
@@ -1144,15 +1144,12 @@ void EditorState::display_history() {
 
 void EditorState::display_sync_menu() {
     if (ImGui::Begin("Adjust Sync", &show_sync_menu, ImGuiWindowFlags_AlwaysAutoResize)) {
-        auto bpm = std::visit(
-            [&](const auto& pos){return applicable_timing->bpm_at(pos);},
-            playback_position
-        );
+        auto intial_bpm = applicable_timing->cbegin()->get_bpm();
         ImGui::PushItemWidth(-70.0f);
-        if (feis::InputDecimal("Initial BPM", &bpm, ImGuiInputTextFlags_EnterReturnsTrue)) {
-            if (bpm > 0) {
+        if (feis::InputDecimal("Initial BPM", &intial_bpm, ImGuiInputTextFlags_EnterReturnsTrue)) {
+            if (intial_bpm > 0) {
                 auto new_timing = *applicable_timing;
-                new_timing.insert(better::BPMAtBeat{bpm, current_snaped_beats()});
+                new_timing.insert(better::BPMAtBeat{intial_bpm, new_timing.cbegin()->get_beats()});
                 replace_applicable_timing_with(new_timing);
             }
         }
@@ -1243,6 +1240,9 @@ void EditorState::display_sync_menu() {
             }
             ImGui::EndChild();
         }
+        if (loading) {
+            ImGui::BeginDisabled();
+        }
         if (ImGui::Button("Guess BPM", {ImGui::GetContentRegionAvail().x * 0.5f, 0.0f})) {
             const auto path = full_audio_path();
             tempo_candidates.reset();
@@ -1250,6 +1250,9 @@ void EditorState::display_sync_menu() {
                 tempo_candidates_loader = std::async(std::launch::async, guess_tempo, *path);
             }
         }
+        if (loading) {
+            ImGui::EndDisabled();
+        }
         ImGui::SameLine();
         const bool tempo_candidate_was_selected_before_pressing = selected_tempo_candidate.has_value();
         if (not tempo_candidate_was_selected_before_pressing) {