Property subract minutes from time with JS/ or Qt
up vote
-2
down vote
favorite
In a little pickle,
My app is a bedside clock which for a function I need to work out 15 Minutes before the alarm is set to go off but everything I try seems to mess up.
Everything will subract the Minutes fine but it won't roll the time over to the previous hour, for example:
Let's say the alarm time is set for 00:15 now if I subtract 30 Minutes it returns 00:45 where it needs to roll over to the previous hour and return 23:45
The App is based on Qt with a Qt Quick UI so JS will work in a function or it can be done from the Qt/c++ side.
Setting the alarm time doesn't include any kind of date information since it's designed to be a single use bedside clock and not a full on multiple alarm function.
If anyone has any ideas it would be appreciated.
qt qml
edited Nov 9 at 23:12
eyllanesc
71.8k93054
asked Nov 9 at 22:54
Paul
114
add a comment |
up vote
-2
down vote
favorite
In a little pickle,
My app is a bedside clock which for a function I need to work out 15 Minutes before the alarm is set to go off but everything I try seems to mess up.
Everything will subract the Minutes fine but it won't roll the time over to the previous hour, for example:
Let's say the alarm time is set for 00:15 now if I subtract 30 Minutes it returns 00:45 where it needs to roll over to the previous hour and return 23:45
The App is based on Qt with a Qt Quick UI so JS will work in a function or it can be done from the Qt/c++ side.
Setting the alarm time doesn't include any kind of date information since it's designed to be a single use bedside clock and not a full on multiple alarm function.
If anyone has any ideas it would be appreciated.
qt qml
edited Nov 9 at 23:12
eyllanesc
71.8k93054
asked Nov 9 at 22:54
Paul
114
2
please provide a Minimal, Complete, and Verifiable example
– eyllanesc
Nov 9 at 23:12
add a comment |
up vote
-2
down vote
favorite
up vote
-2
down vote
favorite
In a little pickle,
My app is a bedside clock which for a function I need to work out 15 Minutes before the alarm is set to go off but everything I try seems to mess up.
Everything will subract the Minutes fine but it won't roll the time over to the previous hour, for example:
Let's say the alarm time is set for 00:15 now if I subtract 30 Minutes it returns 00:45 where it needs to roll over to the previous hour and return 23:45
The App is based on Qt with a Qt Quick UI so JS will work in a function or it can be done from the Qt/c++ side.
Setting the alarm time doesn't include any kind of date information since it's designed to be a single use bedside clock and not a full on multiple alarm function.
If anyone has any ideas it would be appreciated.
qt qml
edited Nov 9 at 23:12
eyllanesc
71.8k93054
asked Nov 9 at 22:54
Paul
114
In a little pickle,
My app is a bedside clock which for a function I need to work out 15 Minutes before the alarm is set to go off but everything I try seems to mess up.
Everything will subract the Minutes fine but it won't roll the time over to the previous hour, for example:
Let's say the alarm time is set for 00:15 now if I subtract 30 Minutes it returns 00:45 where it needs to roll over to the previous hour and return 23:45
The App is based on Qt with a Qt Quick UI so JS will work in a function or it can be done from the Qt/c++ side.
Setting the alarm time doesn't include any kind of date information since it's designed to be a single use bedside clock and not a full on multiple alarm function.
If anyone has any ideas it would be appreciated.
qt qml
qt qml
edited Nov 9 at 23:12
eyllanesc
71.8k93054
asked Nov 9 at 22:54
Paul
114
edited Nov 9 at 23:12
eyllanesc
71.8k93054
asked Nov 9 at 22:54
Paul
114
edited Nov 9 at 23:12
eyllanesc
71.8k93054
edited Nov 9 at 23:12
eyllanesc
71.8k93054
edited Nov 9 at 23:12
eyllanesc
71.8k93054
71.8k93054
asked Nov 9 at 22:54
Paul
114
asked Nov 9 at 22:54
Paul
114
asked Nov 9 at 22:54
Paul
114
114
2
please provide a Minimal, Complete, and Verifiable example
– eyllanesc
Nov 9 at 23:12
add a comment |
2
please provide a Minimal, Complete, and Verifiable example
– eyllanesc
Nov 9 at 23:12
2
2
please provide a Minimal, Complete, and Verifiable example
– eyllanesc
Nov 9 at 23:12
please provide a Minimal, Complete, and Verifiable example
– eyllanesc
Nov 9 at 23:12
add a comment |
1 Answer
1
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oldest
votes
up vote
0
down vote
accepted
Sounds like you are manually working with hours and minutes. It is much easier to just use the QTime and QDateTime objects of the library and let those do the work for you. For instance if you have your alarm time in a QTime
QTime alarmtime = ?;
QTime before = alarmtime.addSecs(-15 * 60);
answered Nov 10 at 6:18
Eelke
13.9k33155
How did I not think of that :o Thank you :)
– Paul
Nov 10 at 17:35
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
Sounds like you are manually working with hours and minutes. It is much easier to just use the QTime and QDateTime objects of the library and let those do the work for you. For instance if you have your alarm time in a QTime
QTime alarmtime = ?;
QTime before = alarmtime.addSecs(-15 * 60);
answered Nov 10 at 6:18
Eelke
13.9k33155
How did I not think of that :o Thank you :)
– Paul
Nov 10 at 17:35
add a comment |
up vote
0
down vote
accepted
Sounds like you are manually working with hours and minutes. It is much easier to just use the QTime and QDateTime objects of the library and let those do the work for you. For instance if you have your alarm time in a QTime
QTime alarmtime = ?;
QTime before = alarmtime.addSecs(-15 * 60);
answered Nov 10 at 6:18
Eelke
13.9k33155
How did I not think of that :o Thank you :)
– Paul
Nov 10 at 17:35
add a comment |
up vote
0
down vote
accepted
up vote
0
down vote
accepted
Sounds like you are manually working with hours and minutes. It is much easier to just use the QTime and QDateTime objects of the library and let those do the work for you. For instance if you have your alarm time in a QTime
QTime alarmtime = ?;
QTime before = alarmtime.addSecs(-15 * 60);
answered Nov 10 at 6:18
Eelke
13.9k33155
Sounds like you are manually working with hours and minutes. It is much easier to just use the QTime and QDateTime objects of the library and let those do the work for you. For instance if you have your alarm time in a QTime
QTime alarmtime = ?;
QTime before = alarmtime.addSecs(-15 * 60);
answered Nov 10 at 6:18
Eelke
13.9k33155
answered Nov 10 at 6:18
Eelke
13.9k33155
answered Nov 10 at 6:18
Eelke
13.9k33155
answered Nov 10 at 6:18
Eelke
13.9k33155
13.9k33155
How did I not think of that :o Thank you :)
– Paul
Nov 10 at 17:35
add a comment |
How did I not think of that :o Thank you :)
– Paul
Nov 10 at 17:35
How did I not think of that :o Thank you :)
– Paul
Nov 10 at 17:35
How did I not think of that :o Thank you :)
– Paul
Nov 10 at 17:35
add a comment |
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2
please provide a Minimal, Complete, and Verifiable example
– eyllanesc
Nov 9 at 23:12