QObject: add startTimer() overload with std::chrono

In client code I often see code like:

    startTimer(1000); //ms

Let the code to be self-explaining. So provide overload
method that takes std::chrono::milliseconds as arg.
QTimer already has std::chrono support, but QObject does not.

Change-Id: Ib348612ce35f1a997b4816fe9e864775cbcbec16
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp b/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp
index f852988e9a..c12ed147db 100644
--- a/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_kernel_qobject.cpp
@@ -156,6 +156,17 @@ MyObject::MyObject(QObject *parent)
     startTimer(50);     // 50-millisecond timer
     startTimer(1000);   // 1-second timer
     startTimer(60000);  // 1-minute timer
+
+    using namespace std::chrono;
+    startTimer(milliseconds(50));
+    startTimer(seconds(1));
+    startTimer(minutes(1));
+
+    // since C++14 we can use std::chrono::duration literals, e.g.:
+    startTimer(100ms);
+    startTimer(5s);
+    startTimer(2min);
+    startTimer(1h);
 }
 
 void MyObject::timerEvent(QTimerEvent *event)