From 93393a288cc62ffecfb44dc200dca51408bb8eff Mon Sep 17 00:00:00 2001
From: spycrab <spycrab@users.noreply.github.com>
Date: Fri, 21 Jun 2019 02:25:30 +0200
Subject: [PATCH] Qt/ARCodeWidget: Support drag and drop reordering

---
 Source/Core/DolphinQt/Config/ARCodeWidget.cpp | 30 +++++++++++++++++--
 Source/Core/DolphinQt/Config/ARCodeWidget.h   |  2 ++
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/Source/Core/DolphinQt/Config/ARCodeWidget.cpp b/Source/Core/DolphinQt/Config/ARCodeWidget.cpp
index c2e192e798..661c722df1 100644
--- a/Source/Core/DolphinQt/Config/ARCodeWidget.cpp
+++ b/Source/Core/DolphinQt/Config/ARCodeWidget.cpp
@@ -70,6 +70,8 @@ void ARCodeWidget::ConnectWidgets()
           &ARCodeWidget::OpenGeneralSettings);
   connect(m_code_list, &QListWidget::itemChanged, this, &ARCodeWidget::OnItemChanged);
   connect(m_code_list, &QListWidget::itemSelectionChanged, this, &ARCodeWidget::OnSelectionChanged);
+  connect(m_code_list->model(), &QAbstractItemModel::rowsMoved, this,
+          &ARCodeWidget::OnListReordered);
 
   connect(m_code_add, &QPushButton::pressed, this, &ARCodeWidget::OnCodeAddPressed);
   connect(m_code_edit, &QPushButton::pressed, this, &ARCodeWidget::OnCodeEditPressed);
@@ -83,6 +85,25 @@ void ARCodeWidget::OnItemChanged(QListWidgetItem* item)
   if (!m_restart_required)
     ActionReplay::ApplyCodes(m_ar_codes);
 
+  UpdateList();
+  SaveCodes();
+}
+
+void ARCodeWidget::OnListReordered()
+{
+  // Reorder codes based on the indices of table item
+  std::vector<ActionReplay::ARCode> codes;
+  codes.reserve(m_ar_codes.size());
+
+  for (int i = 0; i < m_code_list->count(); i++)
+  {
+    const int index = m_code_list->item(i)->data(Qt::UserRole).toInt();
+
+    codes.push_back(std::move(m_ar_codes[index]));
+  }
+
+  m_ar_codes = std::move(codes);
+
   SaveCodes();
 }
 
@@ -105,17 +126,22 @@ void ARCodeWidget::UpdateList()
 {
   m_code_list->clear();
 
-  for (const auto& ar : m_ar_codes)
+  for (size_t i = 0; i < m_ar_codes.size(); i++)
   {
+    const auto& ar = m_ar_codes[i];
     auto* item = new QListWidgetItem(QString::fromStdString(ar.name)
                                          .replace(QStringLiteral("&lt;"), QStringLiteral("<"))
                                          .replace(QStringLiteral("&gt;"), QStringLiteral(">")));
 
-    item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable);
+    item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable |
+                   Qt::ItemIsDragEnabled);
     item->setCheckState(ar.active ? Qt::Checked : Qt::Unchecked);
+    item->setData(Qt::UserRole, static_cast<int>(i));
 
     m_code_list->addItem(item);
   }
+
+  m_code_list->setDragDropMode(QAbstractItemView::InternalMove);
 }
 
 void ARCodeWidget::SaveCodes()
diff --git a/Source/Core/DolphinQt/Config/ARCodeWidget.h b/Source/Core/DolphinQt/Config/ARCodeWidget.h
index 3f7617ff60..9e84d59bd3 100644
--- a/Source/Core/DolphinQt/Config/ARCodeWidget.h
+++ b/Source/Core/DolphinQt/Config/ARCodeWidget.h
@@ -47,6 +47,8 @@ private:
   void OnCodeEditPressed();
   void OnCodeRemovePressed();
 
+  void OnListReordered();
+
   const UICommon::GameFile& m_game;
   std::string m_game_id;
   u16 m_game_revision;