Introduce state machine event priority, make it possible to cancel events

The priority specifies whether the event should be posted to what the
SCXML spec refers to as the "external" (NormalPriority) queue, or the
"internal" (HighPriority) queue.

Delayed events are now posted through a separate function,
postDelayedEvent(). That function returns an id that can be passed to
cancelDelayedEvent() to cancel it.

Reviewed-by: Eskil Abrahamsen Blomfeldt

1 files changed, 2 insertions, 2 deletions

diff --git a/examples/statemachine/pingpong/main.cpp b/examples/statemachine/pingpong/main.cpp
index 7e3d8b15a1..358c499e47 100644
--- a/examples/statemachine/pingpong/main.cpp
+++ b/examples/statemachine/pingpong/main.cpp
@@ -86,7 +86,7 @@ protected:
     }
     virtual void onTransition(QEvent *)
     {
-        machine()->postEvent(new PingEvent(), 500);
+        machine()->postDelayedEvent(new PingEvent(), 500);
         fprintf(stdout, "ping?\n");
     }
 };
@@ -104,7 +104,7 @@ protected:
     }
     virtual void onTransition(QEvent *)
     {
-        machine()->postEvent(new PongEvent(), 500);
+        machine()->postDelayedEvent(new PongEvent(), 500);
         fprintf(stdout, "pong!\n");
     }
 };