From de00fa24da6f5af70a8a8f95ab6d4f996ffeb6bb Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Tue, 28 Apr 2015 09:46:28 +0200
Subject: Async::wait

Useful in i.e. loops that have to wait a bit before every execution.
---
 async/src/async.cpp | 13 +++++++++++++
 async/src/async.h   |  5 +++++
 2 files changed, 18 insertions(+)

(limited to 'async/src')

diff --git a/async/src/async.cpp b/async/src/async.cpp
index e92d333..0e86a84 100644
--- a/async/src/async.cpp
+++ b/async/src/async.cpp
@@ -20,6 +20,7 @@
 #include <QCoreApplication>
 #include <QDebug>
 #include <QEventLoop>
+#include <QTimer>
 
 using namespace Async;
 
@@ -133,3 +134,15 @@ Job<void> Async::dowhile(ThenTask<bool> body)
     });
 }
 
+Job<void> Async::wait(int delay)
+{
+    auto timer = QSharedPointer<QTimer>::create();
+    return Async::start<void>([timer, delay](Async::Future<void> &future) {
+        timer->setSingleShot(true);
+        QObject::connect(timer.data(), &QTimer::timeout, [&future]() {
+            future.setFinished();
+        });
+        timer->start(delay);
+    });
+}
+
diff --git a/async/src/async.h b/async/src/async.h
index 18b5979..b1f1121 100644
--- a/async/src/async.h
+++ b/async/src/async.h
@@ -284,6 +284,11 @@ Job<void> dowhile(ThenTask<bool> body);
 template<typename Out>
 Job<Out> iterate(const Out &container);
 
+/**
+ * Async delay.
+ */
+Job<void> wait(int delay);
+
 /**
  * A null job.
  *
-- 
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