Kivy getting values from Popup Window and use it at a Screen - popup

Question

Hi i am new to kivy and just started programming. So what i want to do is,once a user key in a valid date/time in the popup window, popup will close and will goes to a screen and create buttons. May i know how to pass the values get from getDay() which is dayoutput,timeoutput from popupwindow and transfer use it in another other class? and be able to use in the VariesTimeScreen?
Thank your for taking your time to help :)
class SetDateTime(Popup):
def getDay(self):
set_day = (self.ids.dayofmonth).text
set_month = (self.ids.month).text
set_year = (self.ids.year).text
set_hour = (self.ids.houroftime).text
set_minutes = (self.ids.minuteoftime).text
wrongtime = self.ids.wronginput_time
#Calculate Date and Time only when user input a valid number
if set_day.isdigit() and set_month.isdigit() and
set_year.isdigit()andset_hour.isdigit()
and set_minutes.isdigit():
try:
set_date = datetime.date(int(set_year),
int(set_month),int(set_day))
set_time = datetime.time(int(set_hour), int(set_minutes))
if not (set_date >= counttime.todaydate()):
wrongtime.text = "[color=#FF0000]Date is out of
range[/color]"
if not (set_time >= counttime.todaytime()):
wrongtime.text = "[color=#FF0000]Time is out of
range[/color]"
dayoutput = counttime.calculatedate(set_date)
timeoutput = set_hour + set_minutes
self.dismiss()
return dayoutput,timeoutput
except ValueError:
wrongtime.text = "[color=#FF0000]Please enter a valid
datetime.[/color]"
else:
wrongtime.text = "[color=#FF0000]Please enter a valid
date[/color]"
class VariesTimeScreen(Screen):
def __init__(self, **kwargs):
super(VariesTimeScreen, self).__init__(**kwargs)
a = '_icons_/mcdonald.png'
b = '_icons_/kfc.png'
c = '_icons_/subway.png'
Outlet_Store = [a,b,c]
layout = GridLayout(rows=1, spacing=100, size_hint_y=None,
pos_hint ={"top":.6,"x":0.2})
layout.bind(minimum_height=layout.setter('height'))
#Before the for loop there will be an if statement which is
the Day and Time i get from getDay() values. This part i'm
unsure how to retrieve the values from the SetDateTime Class
for image in Outlet_Store:
food_image = ImageButton(size_hint=(None, None),size=
(100,100),source=image)
layout.add_widget(food_image)
self.add_widget(layout)

Answer 1

One problem with your design is that the VariesTimeScreen is created very early in the App run, like when the GUI is created. So, the day and time from the SetDateTime Popup is not yet available. One way to handle this is to add an on_enter() method to the VariesTimeScreen to make any adjustments to the Screen at that time. To do that, I added Properties to the VariesTimeScreen:
class VariesTimeScreen(Screen):
day = StringProperty('None')
time = NumericProperty(0)
And add the on_enter() method to the VariesTimeScreen class:
def on_enter(self, *args):
print('day:', self.day, ', time:', self.time)
# make changes to the Screen
And then change the SetDateTime class slightly:
class SetDateTime(Popup):
def getDay(self):
set_day = (self.ids.dayofmonth).text
set_month = (self.ids.month).text
set_year = (self.ids.year).text
set_hour = (self.ids.houroftime).text
set_minutes = (self.ids.minuteoftime).text
wrongtime = self.ids.wronginput_time
# Calculate Date and Time only when user input a valid number
if set_day.isdigit() and set_month.isdigit() and set_year.isdigit() and set_hour.isdigit() and set_minutes.isdigit():
try:
set_date = datetime.date(int(set_year),
int(set_month), int(set_day))
set_time = datetime.time(int(set_hour), int(set_minutes))
if not (set_date >= counttime.todaydate()):
wrongtime.text = "[color=#FF0000]Date is out of range[ / color]"
if not (set_time >= counttime.todaytime()):
wrongtime.text = "[color=#FF0000]Time is out of range[ / color]"
dayoutput = counttime.calculatedate(set_date)
timeoutput = set_hour + set_minutes
# get the VariesTimeScreen
varies_time = App.get_running_app().root.ids.screen_manager.get_screen('variestime_screen')
# set the day and time for the VariesTimeScreen
varies_time.day = dayoutput
varies_time.time = timeoutput
# switch to the VariesTimeScreen
App.get_running_app().change_screen('variestime_screen')
# dismiss Popup
self.dismiss()
except ValueError:
wrongtime.text = "[color=#FF0000]Please enter a valid datetime.[ / color]"
else:
wrongtime.text = "[color=#FF0000]Please enter a valid date[ / color]"
The only changes are to set the day and time in the VariesTimeScreen, and to actually switch to the VariesTimeScreen. The switch to the VariesTimeScreen doesn't have to happen there, once the day and time are set, the on_enter() method will get called whenever it becomes the current Screen.