Cleanup DungeonEditor Update routine

src/app/editor/dungeon_editor.cc

@@ -30,6 +30,35 @@ using ImGui::TableSetupColumn;
 
 absl::Status DungeonEditor::Update() {
   if (!is_loaded_ && rom()->is_loaded()) {
+    RETURN_IF_ERROR(Initialize());
+    is_loaded_ = true;
+  }
+
+  if (refresh_graphics_) {
+    RETURN_IF_ERROR(RefreshGraphics());
+    refresh_graphics_ = false;
+  }
+
+  TAB_BAR("##DungeonEditorTabBar")
+  TAB_ITEM("Room Editor")
+  UpdateDungeonRoomView();
+  END_TAB_ITEM()
+  TAB_ITEM("Usage Statistics")
+  if (is_loaded_) {
+    static bool calc_stats = false;
+    if (!calc_stats) {
+      CalculateUsageStats();
+      calc_stats = true;
+    }
+    DrawUsageStats();
+  }
+  END_TAB_ITEM()
+  END_TAB_BAR()
+
+  return absl::OkStatus();
+}
+
+absl::Status DungeonEditor::Initialize() {
   for (int i = 0; i < 0x100 + 40; i++) {
     rooms_.emplace_back(zelda3::dungeon::Room(i));
     rooms_[i].LoadHeader();
@@ -66,11 +95,9 @@ absl::Status DungeonEditor::Update() {
   for (int block : rooms_[current_room_id_].blocks()) {
     room_gfx_sheets_.emplace_back(graphics_bin_[block].get());
   }
+}
 
-    is_loaded_ = true;
-  }
-
-  if (refresh_graphics_) {
+absl::Status DungeonEditor::RefreshGraphics() {
   for (int i = 0; i < 8; i++) {
     int block = rooms_[current_room_id_].blocks()[i];
     graphics_bin_[block].get()->ApplyPaletteWithTransparent(
@@ -83,26 +110,6 @@ absl::Status DungeonEditor::Update() {
         rom()->palette_group("sprites_aux1")[current_palette_id_], 0);
     rom()->UpdateBitmap(graphics_bin_[block].get(), true);
   }
-
-    refresh_graphics_ = false;
-  }
-
-  TAB_BAR("##DungeonEditorTabBar")
-  TAB_ITEM("Room Editor")
-  UpdateDungeonRoomView();
-  END_TAB_ITEM()
-  TAB_ITEM("Usage Statistics")
-  if (is_loaded_) {
-    static bool calc_stats = false;
-    if (!calc_stats) {
-      CalculateUsageStats();
-      calc_stats = true;
-    }
-    DrawUsageStats();
-  }
-  END_TAB_ITEM()
-  END_TAB_BAR()
-
   return absl::OkStatus();
 }
 
@@ -483,7 +490,7 @@ void DungeonEditor::DrawDungeonCanvas(int room_id) {
 
 void DungeonEditor::DrawRoomGraphics() {
   const auto height = 0x40;
-  room_gfx_canvas_.DrawBackground(ImVec2(256 + 1, 0x10 * 0x40 + 1));
+  room_gfx_canvas_.DrawBackground(ImVec2(0x100 + 1, 0x10 * 0x40 + 1));
   room_gfx_canvas_.DrawContextMenu();
   room_gfx_canvas_.DrawTileSelector(32);
   if (is_loaded_) {
@@ -593,26 +600,19 @@ void DungeonEditor::LoadRoomEntrances() {
 // ============================================================================
 
 void DungeonEditor::CalculateUsageStats() {
-  // Create a hash map of the usage for elements of each Dungeon Room such as
-  // the blockset, spriteset, palette, etc. This is so we can keep track of
-  // which graphics sets and palette sets are in use and which are not.
-
   for (const auto& room : rooms_) {
-    // Blockset
     if (blockset_usage_.find(room.blockset) == blockset_usage_.end()) {
       blockset_usage_[room.blockset] = 1;
     } else {
       blockset_usage_[room.blockset] += 1;
     }
 
-    // Spriteset
     if (spriteset_usage_.find(room.spriteset) == spriteset_usage_.end()) {
       spriteset_usage_[room.spriteset] = 1;
     } else {
       spriteset_usage_[room.spriteset] += 1;
     }
 
-    // Palette
     if (palette_usage_.find(room.palette) == palette_usage_.end()) {
       palette_usage_[room.palette] = 1;
     } else {
@@ -756,22 +756,14 @@ void DungeonEditor::DrawUsageStats() {
 }
 
 void DungeonEditor::DrawUsageGrid() {
-  // Create a grid of 295 small squares which is 16 squares wide
-  // Each square represents a room in the game
-  // When you hover a square it should show a hover tooltip with the properties
-  // of the room such as the blockset, spriteset, palette, etc. Calculate the
-  // number of rows
   int totalSquares = 296;
   int squaresWide = 16;
   int squaresTall = (totalSquares + squaresWide - 1) /
                     squaresWide;  // Ceiling of totalSquares/squaresWide
 
-  // Loop through each row
   for (int row = 0; row < squaresTall; ++row) {
-    // Start a new line for each row
     ImGui::NewLine();
 
-    // Loop through each column in the row
     for (int col = 0; col < squaresWide; ++col) {
       // Check if we have reached 295 squares
       if (row * squaresWide + col >= totalSquares) {

src/app/editor/dungeon_editor.h

@@ -46,6 +46,9 @@ class DungeonEditor : public Editor,
   void add_room(int i) { active_rooms_.push_back(i); }
 
  private:
+  absl::Status Initialize();
+  absl::Status RefreshGraphics();
+
   void LoadDungeonRoomSize();
 
   void UpdateDungeonRoomView();