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QDateTime::toString() hideously too slow in gXAxis::paint on Mac

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This commit is contained in:
Mark Watkins 2013-10-25 22:11:23 +10:00
parent 5f3826b67a
commit 4c7c833019
1 changed files with 13 additions and 2 deletions
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15
sleepyhead/Graphs/gXAxis.cpp
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@ -48,6 +48,13 @@ gXAxis::~gXAxis()
void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
{
Q_UNUSED(height)
QString months[]={
QObject::tr("Jan"), QObject::tr("Feb"), QObject::tr("Mar"), QObject::tr("Apr"), QObject::tr("May"), QObject::tr("Jun"),
QObject::tr("Jul"), QObject::tr("Aug"), QObject::tr("Sep"), QObject::tr("Oct"), QObject::tr("Nov"),QObject::tr("Dec")
};
//static QString dow[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
QPainter painter; // Only need this for pixmap caching
@ -193,7 +200,6 @@ void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
else
lines->add(py,top,py,mintop);
}
//static QString dow[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
int ms,m,h,s,d;
qint64 j;
@ -214,7 +220,12 @@ void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
if (fitmode==0) {
d=(j/1000);
QDateTime dt=QDateTime::fromTime_t(d).toUTC();
tmpstr=dt.toString("MMM dd");
QDate date=dt.date();
// SLOW SLOW SLOW!!! On Mac especially, this function is pathetically slow.
//dt.toString("MMM dd");
// Doing it this way instead because it's MUUUUUUCH faster
tmpstr=QString("%1 %2").arg(months[date.month()-1]).arg(date.day());
//} else if (fitmode==0) {
// tmpstr=QString("%1 %2:%3").arg(dow[d]).arg(h,2,10,QChar('0')).arg(m,2,10,QChar('0'));
} else if (fitmode==1) { // minute