diff --git a/include/alarmEventDataView.h b/include/alarmEventDataView.h
index d3d5bd8..c6d943c 100644
--- a/include/alarmEventDataView.h
+++ b/include/alarmEventDataView.h
@@ -22,8 +22,11 @@ public:
 
     bool matches(const EventData& event);
     void clear();
+    QVector<EventData> apply(const QVector<EventData>& events);
 
 private:
+    bool isEmpty();
+
     QDateTime m_startTime;
     QDateTime m_endTime;
     QString m_station;
diff --git a/source/alarmEventDataView.cpp b/source/alarmEventDataView.cpp
index 25c8965..d4784fc 100644
--- a/source/alarmEventDataView.cpp
+++ b/source/alarmEventDataView.cpp
@@ -55,6 +55,35 @@ void AlarmEventDataFilter::clear()
     m_status = -1;
 }
 
+QVector<EventData> AlarmEventDataFilter::apply(const QVector<EventData>& events)
+{
+    if(isEmpty())
+        return events;
+
+    QVector<EventData> filteredEvents;
+    filteredEvents.reserve(events.size()); //分配好内存，防止后面执行append时造成的多次扩容开销
+
+    for(const EventData& event : events)
+    {
+        if(matches(event))
+            filteredEvents.append(event);
+    }
+
+    return filteredEvents; //RVO + QT的隐式共享(QVector)，不用担心开销
+}
+
+bool AlarmEventDataFilter::isEmpty()
+{
+    return !m_startTime.isValid() &&
+           !m_endTime.isValid() &&
+           m_station.isEmpty() &&
+           m_bay.isEmpty() &&
+           m_type == -1 &&
+           m_severity.isEmpty() &&
+           m_description.isEmpty() &&
+           m_status == -1;
+}
+
 
 ///////------AlarmEventDataModel-----
 AlarmEventDataModel::AlarmEventDataModel(QObject* parent)