加了更新LoadInfo负荷的功能。

Signed-off-by: dmy@lab <dmy@lab.lab>

testHasttable/loadinfo.cpp

@@ -1,6 +1,6 @@
 #include "loadinfo.h"
-
-LoadInfo::LoadInfo()
+#include <iostream>
+LoadInfo::LoadInfo(double powerFactor):powerFactor(powerFactor)
 {
 
 }
@@ -18,6 +18,56 @@ QString LoadInfo::getLoadPath()
 {
     return this->loadPath;
 }
+
+QPair<double,double> LoadInfo::getPQ(double current)
+{
+    //将电流转换为负荷.
+    //应该是400V侧电流
+    double c=std::acos(this->powerFactor);
+    double S=0.4*current;//单位kvA
+    double p=std::cos(c)*S;
+    double q=std::sin(c)*S;
+    return QPair<double,double>(p,q);
+}
+
+double LoadInfo::getPA()
+{
+    return this->pqA.first;
+}
+double LoadInfo::getPB()
+{
+    return this->pqB.first;
+}
+double LoadInfo::getPC()
+{
+    return this->pqC.first;
+}
+double LoadInfo::getQA()
+{
+    return this->pqA.second;
+}
+double LoadInfo::getQB()
+{
+    return this->pqB.second;
+}
+double LoadInfo::getQC()
+{
+    return this->pqC.second;
+}
+
+bool LoadInfo::isStartWithTime(const QString& str)
+{
+    QString sub=str.section(';',0,0);
+    if(sub.trimmed().length()==0)
+    {
+        return false;
+    }
+    //2014-07-30 00:45:00
+    QRegExp regExp("\"\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}\"");
+    return regExp.exactMatch(sub);
+}
+
+
 void LoadInfo::setLoadName(const QString &name)
 {
     this->loadName=name;
@@ -27,3 +77,70 @@ void LoadInfo::setLoadPath(const QString &path)
     this->loadPath=path;
 }
 
+QString LoadInfo::trimDoubleQuotation(const QString& str)
+{
+    return QString(str).replace("\"","").replace("\"","");
+}
+
+bool LoadInfo::updateByTime(const QTime& time)
+{
+    QString filePath;
+    filePath=this->loadPath;
+    QFile file(filePath);
+    QString line;
+    QStringList sep;
+    bool ret=false;
+    if(file.open(QFile::ReadOnly))
+    {
+        QTextStream reader(&file);
+        while(!reader.atEnd())
+        {
+            line=reader.readLine().trimmed();
+            if(!this->isStartWithTime(line))
+            {
+                continue;
+            }
+            sep=line.split(';');
+            QString date;
+            date=this->trimDoubleQuotation(sep.at(0));
+            QString dataTimeStr;
+            dataTimeStr=date.section(' ',1,1);
+            QTime dataTime;
+            dataTime=QTime::fromString(dataTimeStr,"hh:mm:ss");
+            if(std::abs(dataTime.secsTo(time))<5)
+            {
+                //开始读负荷
+                bool okA,okB,okC;
+                okA=-1;
+                okB=-1;
+                okC=-1;
+                double CurrentA=this->trimDoubleQuotation(sep.at(1)).toDouble(&okA);
+                double CurrentB=this->trimDoubleQuotation(sep.at(2)).toDouble(&okB);
+                double CurrentC=this->trimDoubleQuotation(sep.at(3)).toDouble(&okC);
+                if(!(okA&&okB&&okC))
+                {
+                    ret=false;
+                    break;
+                }
+                QPair<double,double> pqA=this->getPQ(CurrentA);
+                QPair<double,double> pqB=this->getPQ(CurrentB);
+                QPair<double,double> pqC=this->getPQ(CurrentC);
+                this->pqA=pqA;
+                this->pqB=pqB;
+                this->pqC=pqC;
+                ret=true;
+                break;
+            }
+
+
+        }
+        file.close();
+    }
+    else
+    {
+        std::cout<<filePath.toLocal8Bit().data()<<"not open"<<std::endl;
+    }
+    return ret;
+
+}
+