wxString CompDateAxis::GetSpanLabel(wxDateTime date, wxDateSpan span)
{
int days = span.GetDays();
int weeks = span.GetWeeks();
int months = span.GetMonths();
int years = span.GetYears();
if (days != 0 && weeks == 0 && months == 0 && years == 0) {
// days span
int startDay = date.GetDay();
int endDay = startDay + days;
wxDateTime::wxDateTime_t maxDay = wxDateTime::GetNumberOfDays(date.GetMonth(), date.GetYear());
if (endDay > maxDay) {
endDay -= maxDay;
}
return FormatInterval(startDay, endDay);
}
else if (days == 0 && weeks != 0 && months == 0 && years == 0) {
// weeks span
int startWeek = date.GetWeekOfMonth();
int endWeek = startWeek + weeks;
return FormatInterval(startWeek, endWeek);
}
else if (days == 0 && weeks == 0 && months != 0 && years == 0) {
// monthes span
int startMonth = MonthNum(date.GetMonth());
int endMonth = startMonth + months;
if (endMonth > 12) {
endMonth = endMonth % 12;
}
if (months == 1) {
return wxDateTime::GetMonthName(MonthFromNum(startMonth));
}
else {
return wxString::Format(wxT("%s-%s"),
wxDateTime::GetMonthName(MonthFromNum(startMonth)).c_str(),
wxDateTime::GetMonthName(MonthFromNum(endMonth)).c_str());
}
}
else if (days == 0 && weeks == 0 && months == 0 && years != 0) {
// years span
int startYear = date.GetYear();
int endYear = startYear + years;
return FormatInterval(startYear, endYear);
}
else {
// we have unaligned span, so print start-end dates
wxDateTime endDate = date;
endDate += span;
return wxString::Format(wxT("%s-%s"),
date.Format(wxT("%d-%m-%y")).c_str(),
endDate.Format(wxT("%d-%m-%y")).c_str());
}
}
DTime DTime::operator+(const wxDateSpan& span) const {
//note - this if is neccessary because result of addition of empty
//wxDateSpan to 02:00 CET at the daylight saving time boundary
//magically becomes 02:00 CEST...
if (span.GetYears() || span.GetMonths() || span.GetWeeks() || span.GetDays())
return DTime(m_period, m_time + span);
else
return DTime(m_period, m_time);
}
DTime DTime::operator-(const wxDateSpan& span) const {
if (span.GetYears() || span.GetMonths() || span.GetWeeks() || span.GetDays())
return DTime(m_period, m_time - span);
else
return DTime(m_period, m_time);
}