From 4b5e25893aa31d0299ab89b8cc16aff18c7e9450 Mon Sep 17 00:00:00 2001
From: Maxime Gimeno <maxime.gimeno@gmail.com>
Date: Fri, 18 Dec 2020 16:04:36 +0100
Subject: [PATCH] If there is only one patch, let the user chose its color for
 the tests

---
 Polyhedron/demo/Polyhedron/Scene_c3t3_item.cpp | 17 ++++++++++++++---
 Polyhedron/demo/Polyhedron/Scene_c3t3_item.h   |  1 +
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/Polyhedron/demo/Polyhedron/Scene_c3t3_item.cpp b/Polyhedron/demo/Polyhedron/Scene_c3t3_item.cpp
index ed1fd56a3ec..3aaf96e21c3 100644
--- a/Polyhedron/demo/Polyhedron/Scene_c3t3_item.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene_c3t3_item.cpp
@@ -102,8 +102,12 @@ public :
   }
   void setColor(QColor c) Q_DECL_OVERRIDE
   {
-    qobject_cast<Scene_c3t3_item*>(this->parent())->setColor(c);
+    Scene_c3t3_item* p_item = qobject_cast<Scene_c3t3_item*>(this->parent());
+    if(p_item->number_of_patches() > 1)
+      p_item->setColor(c);
     Scene_item::setColor(c);
+    if(p_item->number_of_patches() <= 1)
+      p_item->changed();
   }
   // Indicates if rendering mode is supported
   bool supportsRenderingMode(RenderingMode m) const Q_DECL_OVERRIDE{
@@ -1308,7 +1312,11 @@ void Scene_c3t3_item_priv::computeIntersection(const Primitive& cell)
 
   typedef unsigned char UC;
   Tr::Cell_handle ch = cell.id();
-  QColor c = this->colors_subdomains[ch->subdomain_index()].lighter(50);
+  QColor c;
+  if(surface_patch_indices_.size()>1)
+    c = this->colors_subdomains[ch->subdomain_index()].lighter(50);
+  else
+    c = intersection->color();
 
   const Tr::Bare_point& pa = wp2p(ch->vertex(0)->point());
   const Tr::Bare_point& pb = wp2p(ch->vertex(1)->point());
@@ -2117,6 +2125,9 @@ double Scene_c3t3_item::get_sharp_edges_angle() { return d->sharp_edges_angle; }
 void Scene_c3t3_item::set_detect_borders(bool b) { d->detect_borders = b;}
 bool Scene_c3t3_item::get_detect_borders() { return d->detect_borders; }
 
-
+std::size_t Scene_c3t3_item::number_of_patches() const
+{
+  return d->surface_patch_indices_.size();
+}
 #include "Scene_c3t3_item.moc"
 
diff --git a/Polyhedron/demo/Polyhedron/Scene_c3t3_item.h b/Polyhedron/demo/Polyhedron/Scene_c3t3_item.h
index d71d906fce3..7d5e343ded0 100644
--- a/Polyhedron/demo/Polyhedron/Scene_c3t3_item.h
+++ b/Polyhedron/demo/Polyhedron/Scene_c3t3_item.h
@@ -128,6 +128,7 @@ public:
     float getShrinkFactor() const;
     bool keyPressEvent(QKeyEvent *) Q_DECL_OVERRIDE;
     bool eventFilter(QObject *, QEvent *) Q_DECL_OVERRIDE;
+    std::size_t number_of_patches() const;
   public Q_SLOTS:
 
   void on_spheres_color_changed();