Add "Last empty" row to Queue tab

data/locale/en-US.ini

@@ -97,6 +97,7 @@ AdvSceneSwitcher.actionQueueTab.queueAddButton.tooltip="Add new action queue"
 AdvSceneSwitcher.actionQueueTab.queueRemoveButton.tooltip="Remove selected action queues"
 AdvSceneSwitcher.actionQueueTab.name.header="Name"
 AdvSceneSwitcher.actionQueueTab.size.header="Size"
+AdvSceneSwitcher.actionQueueTab.lastEmpty.header="Last empty"
 AdvSceneSwitcher.actionQueueTab.isRunning.header="Is running"
 AdvSceneSwitcher.actionQueueTab.runOnStartup.header="Run on startup"
 AdvSceneSwitcher.actionQueueTab.yes="Yes"

lib/queue/action-queue-tab.cpp

@@ -5,6 +5,7 @@
 #include "plugin-state-helpers.hpp"
 #include "sync-helpers.hpp"
 #include "tab-helpers.hpp"
+#include "time-helpers.hpp"
 #include "ui-helpers.hpp"
 
 #include <QTimer>
@@ -55,6 +56,13 @@ void ActionQueueTable::Add()
 		QString::fromStdString(newQueue->Name()));
 }
 
+static double getSecondsSinceLastEmpty(ActionQueue *queue)
+{
+	const auto time = std::chrono::high_resolution_clock::now() -
+			  queue->GetLastEmptyTime();
+	return std::chrono::duration_cast<std::chrono::seconds>(time).count();
+}
+
 static QStringList getCellLabels(ActionQueue *queue, bool addName = true)
 {
 	assert(queue);
@@ -64,6 +72,7 @@ static QStringList getCellLabels(ActionQueue *queue, bool addName = true)
 		result << QString::fromStdString(queue->Name());
 	}
 	result << QString::number(queue->Size())
+	       << FormatRelativeTime(getSecondsSinceLastEmpty(queue))
 	       << QString::fromStdString(obs_module_text(
 			  queue->IsRunning()
 				  ? "AdvSceneSwitcher.actionQueueTab.yes"
@@ -199,6 +208,8 @@ ActionQueueTable::ActionQueueTable(QTabWidget *parent)
 				     "AdvSceneSwitcher.actionQueueTab.name.header")
 			  << obs_module_text(
 				     "AdvSceneSwitcher.actionQueueTab.size.header")
+			  << obs_module_text(
+				     "AdvSceneSwitcher.actionQueueTab.lastEmpty.header")
 			  << obs_module_text(
 				     "AdvSceneSwitcher.actionQueueTab.isRunning.header")
 			  << obs_module_text(

lib/queue/action-queue.cpp

@@ -26,7 +26,10 @@ void SetupActionQueues()
 	done = true;
 }
 
-ActionQueue::ActionQueue() : Item() {}
+ActionQueue::ActionQueue() : Item()
+{
+	_lastEmpty = std::chrono::high_resolution_clock::now();
+}
 
 ActionQueue::~ActionQueue()
 {
@@ -124,6 +127,14 @@ bool ActionQueue::IsEmpty()
 	return _actions.empty();
 }
 
+ActionQueue::TimePoint ActionQueue::GetLastEmptyTime()
+{
+	if (IsEmpty()) {
+		_lastEmpty = std::chrono::high_resolution_clock::now();
+	}
+	return _lastEmpty;
+}
+
 size_t ActionQueue::Size()
 {
 	std::lock_guard<std::mutex> lock(_mutex);
@@ -137,6 +148,8 @@ void ActionQueue::RunActions()
 		{ // Grab next action to run
 			std::unique_lock<std::mutex> lock(_mutex);
 			while (_actions.empty() && !_stop) {
+				_lastEmpty =
+					std::chrono::high_resolution_clock::now();
 				_cv.wait(lock);
 			}
 

lib/queue/action-queue.hpp

@@ -2,11 +2,12 @@
 #include "item-selection-helpers.hpp"
 #include "macro-action.hpp"
 
+#include <chrono>
+#include <condition_variable>
 #include <deque>
 #include <obs-data.h>
 #include <QCheckBox>
 #include <thread>
-#include <condition_variable>
 
 namespace advss {
 
@@ -14,6 +15,8 @@ class ActionQueueSelection;
 class ActionQueueSettingsDialog;
 
 class ActionQueue : public Item {
+	using TimePoint = std::chrono::high_resolution_clock::time_point;
+
 public:
 	ActionQueue();
 	~ActionQueue();
@@ -30,6 +33,7 @@ public:
 
 	void Clear();
 	bool IsEmpty();
+	TimePoint GetLastEmptyTime();
 
 	void Add(const std::shared_ptr<MacroAction> &);
 	size_t Size();
@@ -44,6 +48,7 @@ private:
 	std::condition_variable _cv;
 	std::thread _thread;
 	std::deque<std::shared_ptr<MacroAction>> _actions;
+	TimePoint _lastEmpty;
 
 	friend ActionQueueSelection;
 	friend ActionQueueSettingsDialog;