# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1571894150 14400
# Node ID 5189bfa8ad2a60ea07728be7577379837ac42d82
# Parent  35f9ffb13fd6d918f613ccdd17247a071853bf54
eliminate unnecessary use of pointers

* dialog.h, dialog.cc (QUIWidgetCreator::m_string_list,
QUIWidgetCreator::m_list_index, QUIWidgetCreator::m_path_name):
Use objects instead of pointers.  Change all uses.
(QUIWidgetCreator::~QUIWidgetCreator): Explicitly use default dtor.
(QUIWidgetCreator::get_list_index, QUIWidgetCreator::get_string_list,
QUIWidgetCreator::get_dialog_path): Return value, not const pointer.
Change all uses.

diff -r 35f9ffb13fd6 -r 5189bfa8ad2a libgui/src/dialog.cc
--- a/libgui/src/dialog.cc	Wed Oct 23 12:50:42 2019 -0700
+++ b/libgui/src/dialog.cc	Thu Oct 24 01:15:50 2019 -0400
@@ -48,17 +48,9 @@
 
   QUIWidgetCreator::QUIWidgetCreator (void)
     : QObject (), m_dialog_result (-1), m_dialog_button (),
-      m_string_list (new QStringList ()), m_list_index (new QIntList ()),
-      m_path_name (new QString ())
+      m_string_list (), m_list_index (), m_path_name ()
   { }
 
-  QUIWidgetCreator::~QUIWidgetCreator (void)
-  {
-    delete m_string_list;
-    delete m_list_index;
-    delete m_path_name;
-  }
-
   QString QUIWidgetCreator::rm_amp (const QString& text)
   {
     QString text_wo_amp = text;
@@ -102,7 +94,7 @@
     lock ();
 
     // Store the value so that builtin functions can retrieve.
-    *m_list_index = selected;
+    m_list_index = selected;
     m_dialog_result = button_pressed;
 
     unlock ();
@@ -118,7 +110,7 @@
     lock ();
 
     // Store the value so that builtin functions can retrieve.
-    *m_string_list = input;
+    m_string_list = input;
     m_dialog_result = button_pressed;
 
     unlock ();
@@ -135,9 +127,9 @@
     lock ();
 
     // Store the value so that builtin functions can retrieve.
-    *m_string_list = files;
+    m_string_list = files;
     m_dialog_result = filterindex;
-    *m_path_name = path;
+    m_path_name = path;
 
     unlock ();
 
diff -r 35f9ffb13fd6 -r 5189bfa8ad2a libgui/src/dialog.h
--- a/libgui/src/dialog.h	Wed Oct 23 12:50:42 2019 -0700
+++ b/libgui/src/dialog.h	Thu Oct 24 01:15:50 2019 -0400
@@ -50,7 +50,7 @@
 
     QUIWidgetCreator (void);
 
-    ~QUIWidgetCreator (void);
+    ~QUIWidgetCreator (void) = default;
 
   public:
 
@@ -94,7 +94,7 @@
       return true;
     };
 
-    const QIntList * get_list_index (void) { return m_list_index; }
+    QIntList get_list_index (void) const { return m_list_index; }
 
     bool signal_inputlayout (const QStringList& prompt, const QString& title,
                              const QFloatList& nr, const QFloatList& nc,
@@ -108,7 +108,7 @@
       return true;
     };
 
-    const QStringList * get_string_list (void) { return m_string_list; }
+    QStringList get_string_list (void) const { return m_string_list; }
 
     bool signal_filedialog (const QStringList& filters, const QString& title,
                             const QString& filename, const QString& dirname,
@@ -118,7 +118,7 @@
       return true;
     }
 
-    const QString * get_dialog_path (void) { return m_path_name; }
+    QString get_dialog_path (void) const { return m_path_name; }
 
     void lock (void) { m_mutex.lock (); }
     void wait (void) { m_waitcondition.wait (&m_mutex); }
@@ -162,10 +162,10 @@
 
     // The list could conceivably be big.  Not sure how things are
     // stored internally, so keep off of the stack.
-    QStringList *m_string_list;
-    QIntList *m_list_index;
+    QStringList m_string_list;
+    QIntList m_list_index;
 
-    QString *m_path_name;
+    QString m_path_name;
 
     // GUI objects cannot be accessed in the non-GUI thread.  However,
     // signals can be sent to slots across threads with proper
diff -r 35f9ffb13fd6 -r 5189bfa8ad2a libgui/src/qt-interpreter-events.cc
--- a/libgui/src/qt-interpreter-events.cc	Wed Oct 23 12:50:42 2019 -0700
+++ b/libgui/src/qt-interpreter-events.cc	Thu Oct 24 01:15:50 2019 -0400
@@ -134,12 +134,12 @@
     // The GUI has sent a signal and the thread has been awakened.
 
     // Add all the file dialog results to a string list.
-    const QStringList *inputLine = uiwidget_creator.get_string_list ();
+    QStringList inputLine = uiwidget_creator.get_string_list ();
 
-    for (auto it = inputLine->begin (); it != inputLine->end (); it++)
+    for (auto it = inputLine.begin (); it != inputLine.end (); it++)
       retval.push_back (it->toStdString ());
 
-    retval.push_back (uiwidget_creator.get_dialog_path ()->toStdString ());
+    retval.push_back (uiwidget_creator.get_dialog_path ().toStdString ());
     retval.push_back ((QString ("%1").arg (uiwidget_creator.get_dialog_result ())).toStdString ());
 
     uiwidget_creator.unlock ();
@@ -170,11 +170,11 @@
 
     // The GUI has sent a signal and the thread has been awakened.
 
-    const QStringList *inputLine = uiwidget_creator.get_string_list ();
+    QStringList inputLine = uiwidget_creator.get_string_list ();
 
     uiwidget_creator.unlock ();
 
-    for (auto it = inputLine->begin (); it != inputLine->end (); it++)
+    for (auto it = inputLine.begin (); it != inputLine.end (); it++)
       retval.push_back (it->toStdString ());
 
     return retval;
@@ -207,12 +207,12 @@
 
     // The GUI has sent a signal and the thread has been awakened.
 
-    const QIntList *selected = uiwidget_creator.get_list_index ();
+    QIntList selected = uiwidget_creator.get_list_index ();
     int ok = uiwidget_creator.get_dialog_result ();
 
     uiwidget_creator.unlock ();
 
-    return std::pair<std::list<int>, int> (selected->toStdList (), ok);
+    return std::pair<std::list<int>, int> (selected.toStdList (), ok);
   }
 
   std::string