ts/stuploxx [FIX]: properly handle negative time offset

src/ts/stuploxx/scaling.cc

@@ -43,11 +43,7 @@ namespace stuplo {
 
   pgplot::Trange PanelTime::frange() const
   {
-    libtime::TRelativeTime first=this->begin()-this->reference();
-    libtime::TRelativeTime last=this->end()-this->reference();
-    float ffirst=libtime::time2double(first);
-    float flast=libtime::time2double(last);
-    pgplot::Trange range(ffirst,flast);
+    pgplot::Trange range(this->fbegin(),this->fend());
     return(range);
   } // pgplot::Trange PanelTime::frange() const
 
@@ -55,14 +51,18 @@ namespace stuplo {
 
   float PanelTime::fbegin() const
   {
-    return(float(libtime::time2double(this->begin()-this->reference())));
+    float diff=libtime::time2double(this->begin()-this->reference());
+    if (this->begin()<this->reference()) { diff *= -1.; }
+    return(diff);
   }
 
   /*----------------------------------------------------------------------*/
 
   float PanelTime::fend() const
   {
-    return(float(libtime::time2double(this->end()-this->reference())));
+    float diff=libtime::time2double(this->end()-this->reference());
+    if (this->end()<this->reference()) { diff *= -1.; }
+    return(diff);
   }
 
   /*----------------------------------------------------------------------*/
@@ -73,19 +73,19 @@ namespace stuplo {
     libtime::TAbsoluteTime aend;
     if (range.min<0)
     {
-      abegin=Mreferencetime-libtime::double2time(-range.min);
+      abegin=this->reference()-libtime::double2time(-range.min);
     }
     else
     {
-      abegin=Mreferencetime+libtime::double2time(range.min);
+      abegin=this->reference()+libtime::double2time(range.min);
     }
     if (range.max<0)
     {
-      aend=Mreferencetime-libtime::double2time(-range.max);
+      aend=this->reference()-libtime::double2time(-range.max);
     }
     else
     {
-      aend=Mreferencetime+libtime::double2time(range.max);
+      aend=this->reference()+libtime::double2time(range.max);
     }
     this->setrange(libtime::TRange(abegin, aend));
   }