Python QDateEdit increment

Question

I'm using a QDateEdit control in a GUI in Python. I want to control it just by using keyboard, so when I press the up arrow key it changes from 31-jan-2000 to 01-feb-2000, by instance.

Currently, it just changes year, month and day independiently, but I want to change it like a block, increasing by calendar days.

In the gif, you could see the behavior of the control, I changed day, month and year independently, but I couldn't change it as a "whole date".

Thanks in advance.

Ok, show us what you did so far.... – driconmax Feb 09 '17 at 14:21 — driconmax, Feb 09 '17 at 14:21
I put a gif to show you what I mean. Thank you. – anvelascos Feb 09 '17 at 14:48 — anvelascos, Feb 09 '17 at 14:48

score 1 · Accepted Answer · answered Feb 09 '17 at 18:58

It is possible override the default behaviour by reimplementing stepBy:

class DateEdit(QtGui.QDateEdit):    
    def stepBy(self, steps):
        self.setDateTime(self.dateTime().addDays(steps))

However, this doesn't quite work perfectly, because the cursor must be in the year section to get continuous increments. If it's in the month section, it will only increment through all months/days in the year; and if it's in the day section, it will only increment through all days in the month. Personally, I think I would treat this as a "feature", and leave it at that (since the implementaion is so simple).

You could try to force the cursor to stay in the year section, but that would prevent manual editing, which significantly reduces usability. However, I suppose you could use the calendar-popup to provide manual editing, and then make the line-edit read-only:

class DateEdit(QtGui.QDateEdit):
    def __init__(self, *args, **kwargs):
        super(DateEdit, self).__init__(*args, **kwargs)
        self.setCalendarPopup(True)
        edit = self.lineEdit()
        edit.setReadOnly(True)
        edit.selectionChanged.connect(lambda edit=edit: edit.end(False))

    def stepBy(self, steps):
        self.setDateTime(self.dateTime().addDays(steps))

Python QDateEdit increment

1 Answers1