From 4cb8afebeee77af6482ed7b64dda736af81a11f2 Mon Sep 17 00:00:00 2001
From: Maxime Gimeno <maxime.gimeno@gmail.com>
Date: Wed, 14 Feb 2018 14:12:31 +0100
Subject: [PATCH] Use default filepath of item when saving if exists, if not
 use last path used when save_as in the current session if exists, if not use
 build dir like before.

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

diff --git a/Polyhedron/demo/Polyhedron/MainWindow.cpp b/Polyhedron/demo/Polyhedron/MainWindow.cpp
index db0cf994fd4..7f48202467c 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow.cpp
+++ b/Polyhedron/demo/Polyhedron/MainWindow.cpp
@@ -1606,12 +1606,19 @@ void MainWindow::on_actionSaveAs_triggered()
       continue;
     }
     QString caption = tr("Save %1 to File...").arg(item->name());
+    QString dir = item->property("source filename").toString();
+    if(dir.isEmpty())
+      dir = QString("%1/%2").arg(last_saved_dir).arg(item->name());
+    if(dir.isEmpty())
+      dir = item->name();
     QString filename =
         QFileDialog::getSaveFileName(this,
                                      caption,
-                                     QString("%1").arg(item->name()),
+                                     dir,
                                      filters.join(";;"),
                                      &sf);
+    
+    last_saved_dir = QFileInfo(dir).absoluteDir().path();
     extensions.indexIn(sf.split(";;").first());
     ext1 = extensions.cap();
     //remove `)`
diff --git a/Polyhedron/demo/Polyhedron/MainWindow.h b/Polyhedron/demo/Polyhedron/MainWindow.h
index dbf92ec601f..7118c3ad139 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow.h
+++ b/Polyhedron/demo/Polyhedron/MainWindow.h
@@ -402,6 +402,7 @@ private:
   QTreeView* sceneView;
   Ui::MainWindow* ui;
   QVector<CGAL::Three::Polyhedron_demo_io_plugin_interface*> io_plugins;
+  QString last_saved_dir;
   QMap<QString,QString> default_plugin_selection;
   // typedef to make Q_FOREACH work
   typedef QPair<CGAL::Three::Polyhedron_demo_plugin_interface*, QString> PluginNamePair;