You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
242 lines
12 KiB
242 lines
12 KiB
/*
|
|
* datetime.h - date/time representation with optional date-only value
|
|
* Program: kalarm
|
|
* Copyright © 2003,2005,2007 by David Jarvie <software@astrojar.org.uk>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
#ifndef DATETIME_H
|
|
#define DATETIME_H
|
|
|
|
#include <tqdatetime.h>
|
|
|
|
|
|
/**
|
|
* @short A TQDateTime with date-only option.
|
|
*
|
|
* The DateTime class holds a date, with or without a time.
|
|
*
|
|
* DateTime is very similar to the TQDateTime class, with the additional option to
|
|
* hold a date-only value. This allows a single date-time representation to be used
|
|
* for both an event having a specific date and time, and an all-day event.
|
|
*
|
|
* The time assumed for date-only values is the start-of-day time set by setStartOfDay().
|
|
*
|
|
* @author David Jarvie <software@astrojar.org.uk>
|
|
*/
|
|
class DateTime
|
|
{
|
|
public:
|
|
/** Default constructor.
|
|
* Constructs an invalid date-time.
|
|
*/
|
|
DateTime() : mDateOnly(false), mTimeValid(false) { }
|
|
/** Constructor for a date-only value. */
|
|
DateTime(const TQDate& d) : mDateTime(d), mDateOnly(true) { }
|
|
/** Constructor for a date-time value. */
|
|
DateTime(const TQDate& d, const TQTime& t)
|
|
: mDateTime(d, t), mDateOnly(false), mTimeValid(true) { }
|
|
/** Constructor for a date-time or date-only value.
|
|
* @param dt the date and time to use.
|
|
* @param dateOnly True to construct a date-only value; false to construct a date-time value.
|
|
*/
|
|
DateTime(const TQDateTime& dt, bool dateOnly = false)
|
|
: mDateTime(dt), mDateOnly(dateOnly), mTimeValid(true)
|
|
{ if (dateOnly) mDateTime.setTime(TQTime()); }
|
|
/** Assignment operator.
|
|
* Sets the value to a specified date-time or date-only value.
|
|
*/
|
|
DateTime& operator=(const DateTime& dt)
|
|
{ mDateTime = dt.mDateTime; mDateOnly = dt.mDateOnly; mTimeValid = dt.mTimeValid; return *this; }
|
|
/** Assignment operator.
|
|
* Sets the value to a specified date-time.
|
|
*/
|
|
DateTime& operator=(const TQDateTime& dt)
|
|
{ mDateTime = dt; mDateOnly = false; mTimeValid = true; return *this; }
|
|
/** Assignment operator.
|
|
* Sets the value to a specified date-only value.
|
|
*/
|
|
DateTime& operator=(const TQDate& d)
|
|
{ mDateTime.setDate(d); mDateTime.setTime(TQTime()); mDateOnly = true; return *this; }
|
|
/** Returns true if the date is null and, if it is a date-time value, the time is also null. */
|
|
bool isNull() const { return mDateTime.date().isNull() && (mDateOnly || mDateTime.time().isNull()); }
|
|
/** Returns true if the date is valid and, if it is a date-time value, the time is also valid. */
|
|
bool isValid() const { return mDateTime.date().isValid() && (mDateOnly || mTimeValid && mDateTime.time().isValid()); }
|
|
/** Returns true if it is date-only value. */
|
|
bool isDateOnly() const { return mDateOnly; }
|
|
/** Sets the value to be either date-only or date-time.
|
|
* @param d True to set the value to be date-only; false to set it to a date-time value.
|
|
*/
|
|
void setDateOnly(bool d) { if (d) mDateTime.setTime(TQTime());
|
|
else if (mDateOnly) mTimeValid = false;
|
|
mDateOnly = d;
|
|
}
|
|
/** Returns the date part of the value. */
|
|
TQDate date() const { return mDateTime.date(); }
|
|
/** Returns the time part of the value.
|
|
* If the value is date-only, the time returned is the start-of-day time set by setStartOfDay().
|
|
*/
|
|
TQTime time() const;
|
|
/** Returns the date and time of the value.
|
|
* If the value is date-only, the time part returned is equal to the start-of-day time set
|
|
* by setStartOfDay().
|
|
*/
|
|
TQDateTime dateTime() const;
|
|
/** Returns the date and time of the value.
|
|
* if the value is date-only, the time part returned is 00:00:00.
|
|
*/
|
|
TQDateTime rawDateTime() const { return mDateTime; }
|
|
/** Sets a date-time or date-only value.
|
|
* @param dt the date-time to use.
|
|
* @param dateOnly True to set a date-only value; false to set a date-time value.
|
|
*/
|
|
void set(const TQDateTime& dt, bool dateOnly = false)
|
|
{
|
|
mDateTime = dt;
|
|
mDateOnly = dateOnly;
|
|
if (dateOnly)
|
|
mDateTime.setTime(TQTime());
|
|
mTimeValid = true;
|
|
}
|
|
/** Sets a date-time value. */
|
|
void set(const TQDate& d, const TQTime& t)
|
|
{ mDateTime.setDate(d); mDateTime.setTime(t); mDateOnly = false; mTimeValid = true; }
|
|
/** Sets the time component of the value.
|
|
* The value is converted if necessary to be a date-time value.
|
|
*/
|
|
void setTime(const TQTime& t) { mDateTime.setTime(t); mDateOnly = false; mTimeValid = true; }
|
|
/** Sets the value to a specified date-time value.
|
|
* @param secs The time_t date-time value, expressed as the number of seconds elapsed
|
|
* since 1970-01-01 00:00:00 UTC.
|
|
*/
|
|
void setTime_t(uint secs) { mDateTime.setTime_t(secs); mDateOnly = false; mTimeValid = true; }
|
|
/** Returns a DateTime value @p secs seconds later than the value of this object.
|
|
* If this object is date-only, @p secs is first rounded down to a whole number of days
|
|
* before adding the value.
|
|
*/
|
|
DateTime addSecs(int n) const
|
|
{
|
|
if (mDateOnly)
|
|
return DateTime(mDateTime.date().addDays(n / (3600*24)), true);
|
|
else
|
|
return DateTime(mDateTime.addSecs(n), false);
|
|
}
|
|
/** Returns a DateTime value @p mins minutes later than the value of this object.
|
|
* If this object is date-only, @p mins is first rounded down to a whole number of days
|
|
* before adding the value.
|
|
*/
|
|
DateTime addMins(int n) const
|
|
{
|
|
if (mDateOnly)
|
|
return DateTime(mDateTime.addDays(n / (60*24)), true);
|
|
else
|
|
return DateTime(mDateTime.addSecs(n * 60), false);
|
|
}
|
|
/** Returns a DateTime value @p n days later than the value of this object. */
|
|
DateTime addDays(int n) const { return DateTime(mDateTime.addDays(n), mDateOnly); }
|
|
/** Returns a DateTime value @p n months later than the value of this object. */
|
|
DateTime addMonths(int n) const { return DateTime(mDateTime.addMonths(n), mDateOnly); }
|
|
/** Returns a DateTime value @p n years later than the value of this object. */
|
|
DateTime addYears(int n) const { return DateTime(mDateTime.addYears(n), mDateOnly); }
|
|
/** Returns the number of days from this date or date-time to @p dt. */
|
|
int daysTo(const DateTime& dt) const
|
|
{ return (mDateOnly || dt.mDateOnly) ? mDateTime.date().daysTo(dt.date()) : mDateTime.daysTo(dt.mDateTime); }
|
|
/** Returns the number of minutes from this date or date-time to @p dt.
|
|
* If either of the values is date-only, the result is calculated by simply
|
|
* taking the difference in dates and ignoring the times.
|
|
*/
|
|
int minsTo(const DateTime& dt) const
|
|
{ return (mDateOnly || dt.mDateOnly) ? mDateTime.date().daysTo(dt.date()) * 24*60 : mDateTime.secsTo(dt.mDateTime) / 60; }
|
|
/** Returns the number of seconds from this date or date-time to @p dt.
|
|
* If either of the values is date-only, the result is calculated by simply
|
|
* taking the difference in dates and ignoring the times.
|
|
*/
|
|
int secsTo(const DateTime& dt) const
|
|
{ return (mDateOnly || dt.mDateOnly) ? mDateTime.date().daysTo(dt.date()) * 24*3600 : mDateTime.secsTo(dt.mDateTime); }
|
|
/** Returns the value as a string.
|
|
* If it is a date-time, both time and date are included in the output.
|
|
* If it is date-only, only the date is included in the output.
|
|
*/
|
|
TQString toString(Qt::DateFormat f = Qt::TextDate) const
|
|
{
|
|
if (mDateOnly)
|
|
return mDateTime.date().toString(f);
|
|
else if (mTimeValid)
|
|
return mDateTime.toString(f);
|
|
else
|
|
return TQString::null;
|
|
}
|
|
/** Returns the value as a string.
|
|
* If it is a date-time, both time and date are included in the output.
|
|
* If it is date-only, only the date is included in the output.
|
|
*/
|
|
TQString toString(const TQString& format) const
|
|
{
|
|
if (mDateOnly)
|
|
return mDateTime.date().toString(format);
|
|
else if (mTimeValid)
|
|
return mDateTime.toString(format);
|
|
else
|
|
return TQString::null;
|
|
}
|
|
/** Returns the value as a string, formatted according to the user's locale.
|
|
* If it is a date-time, both time and date are included in the output.
|
|
* If it is date-only, only the date is included in the output.
|
|
*/
|
|
TQString formatLocale(bool shortFormat = true) const;
|
|
/** Sets the start-of-day time.
|
|
* The default value is midnight (0000 hrs).
|
|
*/
|
|
static void setStartOfDay(const TQTime& sod) { mStartOfDay = sod; }
|
|
/** Returns the start-of-day time. */
|
|
static TQTime startOfDay() { return mStartOfDay; }
|
|
|
|
friend bool operator==(const DateTime& dt1, const DateTime& dt2);
|
|
friend bool operator<(const DateTime& dt1, const DateTime& dt2);
|
|
|
|
private:
|
|
static TQTime mStartOfDay;
|
|
TQDateTime mDateTime;
|
|
bool mDateOnly;
|
|
bool mTimeValid; // whether the time is potentially valid - applicable only if mDateOnly false
|
|
};
|
|
|
|
/** Returns true if the two values are equal. */
|
|
bool operator==(const DateTime& dt1, const DateTime& dt2);
|
|
/** Returns true if the @p dt1 is earlier than @p dt2.
|
|
* If the two values have the same date, and one value is date-only while the other is a date-time, the
|
|
* time used for the date-only value is the start-of-day time set in the KAlarm Preferences dialogue.
|
|
*/
|
|
bool operator<(const DateTime& dt1, const DateTime& dt2);
|
|
/** Returns true if the two values are not equal. */
|
|
inline bool operator!=(const DateTime& dt1, const DateTime& dt2) { return !operator==(dt1, dt2); }
|
|
/** Returns true if the @p dt1 is later than @p dt2.
|
|
* If the two values have the same date, and one value is date-only while the other is a date-time, the
|
|
* time used for the date-only value is the start-of-day time set in the KAlarm Preferences dialogue.
|
|
*/
|
|
inline bool operator>(const DateTime& dt1, const DateTime& dt2) { return operator<(dt2, dt1); }
|
|
/** Returns true if the @p dt1 is later than or equal to @p dt2.
|
|
* If the two values have the same date, and one value is date-only while the other is a date-time, the
|
|
* time used for the date-only value is the start-of-day time set in the KAlarm Preferences dialogue.
|
|
*/
|
|
inline bool operator>=(const DateTime& dt1, const DateTime& dt2) { return !operator<(dt1, dt2); }
|
|
/** Returns true if the @p dt1 is earlier than or equal to @p dt2.
|
|
* If the two values have the same date, and one value is date-only while the other is a date-time, the
|
|
* time used for the date-only value is the start-of-day time set in the KAlarm Preferences dialogue.
|
|
*/
|
|
inline bool operator<=(const DateTime& dt1, const DateTime& dt2) { return !operator<(dt2, dt1); }
|
|
|
|
#endif // DATETIME_H
|