# HG changeset patch
# User Chris Cannam
# Date 1552303038 0
# Node ID 676e32fa403ebde8d38144f05aa43a232b4f44f2
# Parent  172bd3374adfa4fe944f897e24eedbdd3a9b4398
Permit hashing

diff -r 172bd3374adf -r 676e32fa403e base/Event.h
--- a/base/Event.h	Mon Mar 11 09:53:28 2019 +0000
+++ b/base/Event.h	Mon Mar 11 11:17:18 2019 +0000
@@ -40,6 +40,11 @@
 class Event
 {
 public:
+    Event() :
+        m_haveValue(false), m_haveLevel(false), m_haveReferenceFrame(false),
+        m_value(0.f), m_level(0.f), m_frame(0),
+        m_duration(0), m_referenceFrame(0), m_label() { }
+    
     Event(sv_frame_t frame) :
         m_haveValue(false), m_haveLevel(false), m_haveReferenceFrame(false),
         m_value(0.f), m_level(0.f), m_frame(frame),
@@ -264,6 +269,16 @@
 
         return n;
     }
+
+    uint hash(uint seed = 0) const {
+        uint h = qHash(m_label, seed);
+        if (m_haveValue) h ^= qHash(m_value);
+        if (m_haveLevel) h ^= qHash(m_level);
+        h ^= qHash(m_frame);
+        h ^= qHash(m_duration);
+        if (m_haveReferenceFrame) h ^= qHash(m_referenceFrame);
+        return h;
+    }
     
 private:
     // The order of fields here is chosen to minimise overall size of struct.
@@ -280,6 +295,10 @@
     QString m_label;
 };
 
+inline uint qHash(const Event &e, uint seed = 0) {
+    return e.hash(seed);
+}
+
 typedef std::vector<Event> EventVector;
 
 #endif