From 787dd33348f78561533d1fa561b0a5c404b7569a Mon Sep 17 00:00:00 2001
From: dreamsourcelabTAI <tzz@dreamsourcelab.com>
Date: Fri, 29 Mar 2024 22:14:12 +0800
Subject: [PATCH] fix: on fft options dialog, app crashed when 'sample
 interval' no select value

---
 DSView/pv/dialogs/fftoptions.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/DSView/pv/dialogs/fftoptions.cpp b/DSView/pv/dialogs/fftoptions.cpp
index 54500e7c..b93be11c 100644
--- a/DSView/pv/dialogs/fftoptions.cpp
+++ b/DSView/pv/dialogs/fftoptions.cpp
@@ -282,6 +282,10 @@ void FftOptions::len_changed(int index)
         _interval_combobox->addItem(QString::number(i),
             QVariant::fromValue(i));
     }
+    
+    if (pre_index >= _interval_combobox->count()){
+        pre_index = 0;
+    }
     _interval_combobox->setCurrentIndex(pre_index);
 }