From 93e15366e73d7563c22537cf286cb39777aebc41 Mon Sep 17 00:00:00 2001
From: yodalee <lc85301@gmail.com>
Date: Wed, 7 Jan 2015 01:45:53 +0800
Subject: [PATCH] modify dialog call, prevent memory leak

---
 qucs/qucs/dialogs/qucssettingsdialog.cpp | 7 +++++--
 qucs/qucs/dialogs/qucssettingsdialog.h   | 3 +++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/qucs/qucs/dialogs/qucssettingsdialog.cpp b/qucs/qucs/dialogs/qucssettingsdialog.cpp
index 5ad0050262..042797f847 100644
--- a/qucs/qucs/dialogs/qucssettingsdialog.cpp
+++ b/qucs/qucs/dialogs/qucssettingsdialog.cpp
@@ -433,6 +433,7 @@ QucsSettingsDialog::QucsSettingsDialog(QucsApp *parent)
     ascoEdit->setText(QucsSettings.AscoBinDir.canonicalPath());
     octaveEdit->setText(QucsSettings.OctaveBinDir.canonicalPath());
 
+    shortcutDialog = NULL;
 
     resize(300, 200);
 }
@@ -699,8 +700,10 @@ void QucsSettingsDialog::slotBGColorDialog()
 // -----------------------------------------------------------
 void QucsSettingsDialog::slotShortcutDialog()
 {
-  QucsShortcutDialog *d = new QucsShortcutDialog(App);
-  d->exec();
+  if (!shortcutDialog) {
+    shortcutDialog = new QucsShortcutDialog(App);
+  }
+  shortcutDialog->exec();
 }
 
 // -----------------------------------------------------------
diff --git a/qucs/qucs/dialogs/qucssettingsdialog.h b/qucs/qucs/dialogs/qucssettingsdialog.h
index f67073de20..a3dcf6dbfc 100644
--- a/qucs/qucs/dialogs/qucssettingsdialog.h
+++ b/qucs/qucs/dialogs/qucssettingsdialog.h
@@ -27,6 +27,8 @@
 #include <QRegExp>
 #include <QVBoxLayout>
 
+class QucsShortcutDialog;
+
 class QLineEdit;
 class QCheckBox;
 class QVBoxLayout;
@@ -98,6 +100,7 @@ private slots:
     QRegExp Expr;
     QRegExpValidator *Validator;
 
+    QucsShortcutDialog *shortcutDialog;
 private:
     QStringList currentPaths;