From 19b2f10d1dba660ad725c3f1bf0c59a1cbad3bfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thibault=20de=20Vill=C3=A8le?=
 <25150288+Thibaulltt@users.noreply.github.com>
Date: Wed, 25 Mar 2026 02:31:23 +0100
Subject: [PATCH 1/4] feat: add a per-structure slicing plane button

---
 src/structure.cpp | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/src/structure.cpp b/src/structure.cpp
index 9e6c3ee2..9386ffe3 100644
--- a/src/structure.cpp
+++ b/src/structure.cpp
@@ -92,22 +92,34 @@ void Structure::buildUI() {
 
       // Toggle whether slice planes apply
       if (ImGui::BeginMenu("Slice planes")) {
+        if (ImGui::Button("Add slice plane")) {
+          openSlicePlaneMenu = true;
+          addSlicePlane();
+        }
+        if (ImGui::Button("...for this structure only")) {
+          openSlicePlaneMenu = true;
+          SlicePlane* plane = addSlicePlane(std::string("Slice plane of ") + this->name);
+          /* Set all structures to ignore this plane, except for this one in particular! */
+          for (auto const& supermap: state::structures) {
+            for (auto const& map: supermap.second) {
+              map.second->setIgnoreSlicePlane(plane->name, supermap.first != this->typeName() or map.first != this->name);
+            }
+          }
+        }
+        ImGui::Separator();
+        ImGui::TextUnformatted("Applies to this structure:");
+        ImGui::Indent(20);
         if (state::slicePlanes.empty()) {
           // if there are none, show a helpful message
-          if (ImGui::Button("Add slice plane")) {
-            openSlicePlaneMenu = true;
-            addSlicePlane();
-          }
+          ImGui::TextWrapped("< none >");
         } else {
           // otherwise, show toggles for each
-          ImGui::TextUnformatted("Applies to this structure:");
-          ImGui::Indent(20);
           for (std::unique_ptr<SlicePlane>& s : state::slicePlanes) {
             bool ignorePlane = getIgnoreSlicePlane(s->name);
             if (ImGui::MenuItem(s->name.c_str(), NULL, !ignorePlane)) setIgnoreSlicePlane(s->name, !ignorePlane);
           }
-          ImGui::Indent(-20);
         }
+        ImGui::Indent(-20);
         ImGui::TextUnformatted("");
         ImGui::Separator();
         ImGui::TextUnformatted("Note: Manage slice planes in");

From 9f340c1603f55107362ccfbb92e7dd1c12a031f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thibault=20de=20Vill=C3=A8le?=
 <25150288+Thibaulltt@users.noreply.github.com>
Date: Wed, 25 Mar 2026 17:01:40 +0100
Subject: [PATCH 2/4] fix: don't try to be fancy with names

---
 src/structure.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/structure.cpp b/src/structure.cpp
index 9386ffe3..da8bf5e6 100644
--- a/src/structure.cpp
+++ b/src/structure.cpp
@@ -98,7 +98,7 @@ void Structure::buildUI() {
         }
         if (ImGui::Button("...for this structure only")) {
           openSlicePlaneMenu = true;
-          SlicePlane* plane = addSlicePlane(std::string("Slice plane of ") + this->name);
+          SlicePlane* plane = addSlicePlane();
           /* Set all structures to ignore this plane, except for this one in particular! */
           for (auto const& supermap: state::structures) {
             for (auto const& map: supermap.second) {

From 82857b129395c9f05293b4f5f9fa294fe143e0da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thibault=20de=20Vill=C3=A8le?=
 <25150288+Thibaulltt@users.noreply.github.com>
Date: Wed, 25 Mar 2026 17:15:25 +0100
Subject: [PATCH 3/4] fix: respect MSVC operator definitions

See https://learn.microsoft.com/en-us/cpp/cpp/keywords-cpp?view=msvc-170
on note (b).
---
 src/structure.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/structure.cpp b/src/structure.cpp
index da8bf5e6..1e60a9b1 100644
--- a/src/structure.cpp
+++ b/src/structure.cpp
@@ -102,7 +102,7 @@ void Structure::buildUI() {
           /* Set all structures to ignore this plane, except for this one in particular! */
           for (auto const& supermap: state::structures) {
             for (auto const& map: supermap.second) {
-              map.second->setIgnoreSlicePlane(plane->name, supermap.first != this->typeName() or map.first != this->name);
+              map.second->setIgnoreSlicePlane(plane->name, (supermap.first != this->typeName() || map.first != this->name));
             }
           }
         }

From 8b9d05394e84eed38734ceaeed05fc603e6860f5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thibault=20de=20Vill=C3=A8le?=
 <25150288+Thibaulltt@users.noreply.github.com>
Date: Thu, 26 Mar 2026 11:05:43 +0100
Subject: [PATCH 4/4] feat: keep structure slice plane menu open

---
 src/structure.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/structure.cpp b/src/structure.cpp
index 1e60a9b1..55f9b6a5 100644
--- a/src/structure.cpp
+++ b/src/structure.cpp
@@ -92,6 +92,8 @@ void Structure::buildUI() {
 
       // Toggle whether slice planes apply
       if (ImGui::BeginMenu("Slice planes")) {
+        /* We want to keep the menu open, as we might toggle on/off many slice planes at once. */
+        ImGui::PushItemFlag(ImGuiItemFlags_AutoClosePopups, false);
         if (ImGui::Button("Add slice plane")) {
           openSlicePlaneMenu = true;
           addSlicePlane();
@@ -125,6 +127,7 @@ void Structure::buildUI() {
         ImGui::TextUnformatted("Note: Manage slice planes in");
         ImGui::TextUnformatted("      View --> Slice Planes.");
 
+        ImGui::PopItemFlag();
         ImGui::EndMenu();
       }