Add BeginWindowWithDisplaySettings with background opacity to start

src/app/editor/overworld_editor.cc

@@ -296,9 +296,9 @@ absl::Status OverworldEditor::DrawToolset() {
   }
 
   if (show_gfx_group) {
-    ImGui::Begin("Gfx Group Editor", &show_gfx_group);
+    gui::BeginWindowWithDisplaySettings("Gfx Group Editor", &show_gfx_group);
     RETURN_IF_ERROR(gfx_group_editor_.Update())
-    ImGui::End();
+    gui::EndWindowWithDisplaySettings();
   }
 
   if (show_properties) {
@@ -721,13 +721,15 @@ void OverworldEditor::CheckForCurrentMap() {
                                parent_map_x * small_map_size, large_map_size,
                                large_map_size);
     // ow_map_canvas_.mutable_points()->push_back(
-    //     ImVec2(parent_map_x * small_map_size, parent_map_y * small_map_size));
+    //     ImVec2(parent_map_x * small_map_size, parent_map_y *
+    //     small_map_size));
   } else {
     ow_map_canvas_.DrawOutline(current_map_x * small_map_size,
-                               current_map_y * small_map_size,
-                               small_map_size, small_map_size);
+                               current_map_y * small_map_size, small_map_size,
+                               small_map_size);
     // ow_map_canvas_.mutable_points()->push_back(
-    //     ImVec2(current_map_x * small_map_size, current_map_y * small_map_size));
+    //     ImVec2(current_map_x * small_map_size, current_map_y *
+    //     small_map_size));
   }
 
   static int prev_map_;

src/app/gui/style.cc

@@ -5,9 +5,32 @@
 
 namespace yaze {
 namespace app {
-
 namespace gui {
 
+void BeginWindowWithDisplaySettings(const char* id, bool* active, const ImVec2& size,
+                    ImGuiWindowFlags flags) {
+  ImGuiStyle* ref = &ImGui::GetStyle();
+  static float childBgOpacity = 0.75f;
+  auto color = ImVec4(0.f, 0.f, 0.f, childBgOpacity);
+
+  ImGui::PushStyleColor(ImGuiCol_WindowBg, color);
+  ImGui::PushStyleColor(ImGuiCol_ChildBg, color);
+  ImGui::PushStyleColor(ImGuiCol_Border, color);
+
+  ImGui::Begin(id, active, flags | ImGuiWindowFlags_MenuBar);
+  ImGui::BeginMenuBar();
+  if (ImGui::BeginMenu("Display Settings")) {
+    ImGui::SliderFloat("Child Background Opacity", &childBgOpacity, 0.0f, 1.0f);
+    ImGui::EndMenu();
+  }
+  ImGui::EndMenuBar();
+}
+
+void EndWindowWithDisplaySettings() {
+  ImGui::End();
+  ImGui::PopStyleColor(3);
+}
+
 void DrawDisplaySettings(ImGuiStyle* ref) {
   // You can pass in a reference ImGuiStyle structure to compare to, revert to
   // and save to (without a reference style pointer, we will use one compared
@@ -473,6 +496,7 @@ void ColorsYaze() {
   colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
   colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
 }
+
 }  // namespace gui
 }  // namespace app
 }  // namespace yaze

src/app/gui/style.h

@@ -9,6 +9,12 @@ namespace yaze {
 namespace app {
 namespace gui {
 
+void BeginWindowWithDisplaySettings(const char* id, bool* active,
+                                    const ImVec2& size = ImVec2(0, 0),
+                                    ImGuiWindowFlags flags = 0);
+
+void EndWindowWithDisplaySettings();
+
 void DrawDisplaySettings(ImGuiStyle* ref = nullptr);
 
 void TextWithSeparators(const absl::string_view& text);