From 7ff36f55c78bde59995e46af6c79d1a8e48dc385 Mon Sep 17 00:00:00 2001
From: dreamsourcelabTAI <tzz@dreamsourcelab.com>
Date: Fri, 9 Jun 2023 15:05:32 +0800
Subject: [PATCH] Load the font name list one time

---
 DSView/pv/dialogs/applicationpardlg.cpp | 9 +++++++--
 DSView/pv/dialogs/applicationpardlg.h   | 5 ++++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/DSView/pv/dialogs/applicationpardlg.cpp b/DSView/pv/dialogs/applicationpardlg.cpp
index bc2d86cf..eb076a0e 100644
--- a/DSView/pv/dialogs/applicationpardlg.cpp
+++ b/DSView/pv/dialogs/applicationpardlg.cpp
@@ -59,8 +59,13 @@ void ApplicationParamDlg::bind_font_name_list(QComboBox *box, QString v)
     QString defName(L_S(STR_PAGE_DLG, S_ID(IDS_DLG_DEFAULT_FONT), "Default"));
     box->addItem(defName);
 
-    QFontDatabase fDataBase;
-    for (QString family : fDataBase.families()) {
+    if (_font_name_list.size() == 0)
+    {
+        QFontDatabase fDataBase;
+        _font_name_list = fDataBase.families();
+    }
+   
+    for (QString family : _font_name_list) {
         if (family.indexOf("[") == -1)
         {
             box->addItem(family);
diff --git a/DSView/pv/dialogs/applicationpardlg.h b/DSView/pv/dialogs/applicationpardlg.h
index 72e74910..c13f6529 100644
--- a/DSView/pv/dialogs/applicationpardlg.h
+++ b/DSView/pv/dialogs/applicationpardlg.h
@@ -23,6 +23,7 @@
 
 #include <QObject>
 #include <QWidget>
+#include <QStringList>
 
 class QComboBox;
 
@@ -57,7 +58,9 @@ namespace pv
         void bind_font_name_list(QComboBox *box, QString v);
 
         void bind_font_size_list(QComboBox *box, float size);
- 
+
+    private:
+        QStringList _font_name_list; 
     };
 
 }//