From 77e9b511cf6fe8709e832ced7334287ae683653c Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@koefferlein.de>
Date: Fri, 2 Dec 2022 17:32:18 +0100
Subject: [PATCH] Fixed slow 'show only selected' with many layers (reason: too
 many updates of recent editor options layer list)

---
 src/edt/edt/edtRecentConfigurationPage.cc | 10 ++++++++--
 src/edt/edt/edtRecentConfigurationPage.h  |  5 ++++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/edt/edt/edtRecentConfigurationPage.cc b/src/edt/edt/edtRecentConfigurationPage.cc
index 84f831c8d..071527444 100644
--- a/src/edt/edt/edtRecentConfigurationPage.cc
+++ b/src/edt/edt/edtRecentConfigurationPage.cc
@@ -69,7 +69,7 @@ RecentConfigurationPage::init ()
   }
   mp_tree_widget->setHeaderLabels (column_labels);
 
-  update_list (get_stored_values ());
+  update_list ();
 }
 
 RecentConfigurationPage::~RecentConfigurationPage ()
@@ -314,11 +314,17 @@ RecentConfigurationPage::render_to (QTreeWidgetItem *item, int column, const std
 void
 RecentConfigurationPage::layers_changed (int)
 {
-  update_list (get_stored_values ());
+  dm_update_list ();
 }
 
 void
 RecentConfigurationPage::technology_changed (const std::string &)
+{
+  dm_update_list ();
+}
+
+void
+RecentConfigurationPage::update_list ()
 {
   update_list (get_stored_values ());
 }
diff --git a/src/edt/edt/edtRecentConfigurationPage.h b/src/edt/edt/edtRecentConfigurationPage.h
index 00997fd0f..ba084dc20 100644
--- a/src/edt/edt/edtRecentConfigurationPage.h
+++ b/src/edt/edt/edtRecentConfigurationPage.h
@@ -27,6 +27,7 @@
 
 #include "layEditorOptionsPage.h"
 #include "tlObject.h"
+#include "tlDeferredExecution.h"
 
 #include <list>
 #include <QTreeWidget>
@@ -79,7 +80,7 @@ public:
 
   template <class Iter>
   RecentConfigurationPage (lay::LayoutViewBase *view, lay::Dispatcher *dispatcher, const std::string &recent_cfg_name, Iter begin_cfg, Iter end_cfg)
-    : EditorOptionsPage (view, dispatcher), m_recent_cfg_name (recent_cfg_name), m_cfg (begin_cfg, end_cfg)
+    : EditorOptionsPage (view, dispatcher), m_recent_cfg_name (recent_cfg_name), m_cfg (begin_cfg, end_cfg), dm_update_list (this, &RecentConfigurationPage::update_list)
   {
     init ();
   }
@@ -99,9 +100,11 @@ private:
   std::string m_recent_cfg_name;
   std::list<ConfigurationDescriptor> m_cfg;
   QTreeWidget *mp_tree_widget;
+  tl::DeferredMethod<RecentConfigurationPage> dm_update_list;
 
   void init ();
   void update_list (const std::list<std::vector<std::string> > &stored_values);
+  void update_list ();
   std::list<std::vector<std::string> > get_stored_values () const;
   void set_stored_values (const std::list<std::vector<std::string> > &values) const;
   void render_to (QTreeWidgetItem *item, int column, const std::vector<std::string> &values, RecentConfigurationPage::ConfigurationRendering rendering);