From 209e6deeacb7d6ec5894c3b04310d9ede026cdcd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Wed, 4 Nov 2015 17:51:20 +0100
Subject: [PATCH] improve add polylines

---
 Polyhedron/demo/Polyhedron/Add_polylines_dialog.ui | 2 +-
 Polyhedron/demo/Polyhedron/MainWindow.cpp          | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Polyhedron/demo/Polyhedron/Add_polylines_dialog.ui b/Polyhedron/demo/Polyhedron/Add_polylines_dialog.ui
index 302c250c6ce..adf75f4ecbf 100644
--- a/Polyhedron/demo/Polyhedron/Add_polylines_dialog.ui
+++ b/Polyhedron/demo/Polyhedron/Add_polylines_dialog.ui
@@ -36,7 +36,7 @@ p, li { white-space: pre-wrap; }
        <bool>false</bool>
       </property>
       <property name="placeholderText">
-       <string notr="true">New polyline format:  A1 A2 A3 B1 B2 B3 C1 C2 C3... </string>
+       <string notr="true">Polyline format:  Ax Ay A3 Bx By Bz ... Zx Zy Zz </string>
       </property>
      </widget>
     </item>
diff --git a/Polyhedron/demo/Polyhedron/MainWindow.cpp b/Polyhedron/demo/Polyhedron/MainWindow.cpp
index df8aa9f3832..c0e9596da9a 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow.cpp
+++ b/Polyhedron/demo/Polyhedron/MainWindow.cpp
@@ -1486,6 +1486,14 @@ void MainWindow::on_addButton_clicked()
   int counter = 0;
   double coord[3];
   bool ok = true;
+  if (list.isEmpty()) return;
+  if (list.size()%3!=0){
+    QMessageBox *msgBox = new QMessageBox;
+    msgBox->setWindowTitle("Error");
+    msgBox->setText("ERROR : Input should consists of triplets.");
+    msgBox->exec();
+    return;
+  }
   Q_FOREACH(QString s, list)
   {
       if(!s.isEmpty())