Allow drag and drop reordering of macros

forms/advanced-scene-switcher.ui

@@ -584,6 +584,15 @@
                 <verstretch>0</verstretch>
                </sizepolicy>
               </property>
+              <property name="dragEnabled">
+               <bool>true</bool>
+              </property>
+              <property name="dragDropMode">
+               <enum>QAbstractItemView::InternalMove</enum>
+              </property>
+              <property name="defaultDropAction">
+               <enum>Qt::MoveAction</enum>
+              </property>
               <property name="sortingEnabled">
                <bool>false</bool>
               </property>

src/headers/advanced-scene-switcher.hpp

@@ -154,6 +154,7 @@ public slots:
 	void MoveMacroConditionUp(int idx);
 	void MoveMacroConditionDown(int idx);
 	void HighlightMatchedMacros();
+	void MacroDragDropReorder(QModelIndex, int, int, QModelIndex, int);
 
 	void on_screenRegionSwitches_currentRowChanged(int idx);
 	void on_showFrame_clicked();

src/macro-tab.cpp

@@ -384,6 +384,25 @@ void AdvSceneSwitcher::on_macros_currentRowChanged(int idx)
 	}
 }
 
+void AdvSceneSwitcher::MacroDragDropReorder(QModelIndex, int from, int,
+					    QModelIndex, int to)
+{
+	std::lock_guard<std::mutex> lock(switcher->m);
+	if (from > to) {
+		std::rotate(switcher->macros.rend() - from - 1,
+			    switcher->macros.rend() - from,
+			    switcher->macros.rend() - to);
+	} else {
+		std::rotate(switcher->macros.begin() + from,
+			    switcher->macros.begin() + from + 1,
+			    switcher->macros.begin() + to);
+	}
+
+	for (auto &m : switcher->macros) {
+		m->ResolveMacroRef();
+	}
+}
+
 void AdvSceneSwitcher::setupMacroTab()
 {
 	const QSignalBlocker signalBlocker(ui->macros);
@@ -401,6 +420,12 @@ void AdvSceneSwitcher::setupMacroTab()
 		ui->macroHelp->setVisible(false);
 	}
 
+	connect(ui->macros->model(),
+		SIGNAL(rowsMoved(QModelIndex, int, int, QModelIndex, int)),
+		this,
+		SLOT(MacroDragDropReorder(QModelIndex, int, int, QModelIndex,
+					  int)));
+
 	delete conditionsList;
 	conditionsList = new MacroSegmentList(this);
 	conditionsList->SetHelpMsg(