class DropDownSelection(DropDown): def __init___(self, **kwargs): super(DropDownSelection, self).__init__(**kwargs) self.mainButton = ObjectProperty(None) def select(self, button): self.mainButton.text = button.text self.dismiss() def main(self, button): self.mainButton = button self.mainButton.bind(on_release = self.open)
def showFoodInList(self, *args):
if os.path.isfile('foodDatabase.txt') == False:
#define Gridlayout for buttons
buttonWithoutDatabaseGrid = GridLayout(cols=1,
row_force_default=True,
row_default_height=200,
spacing=15)
backButton = Button(text='go back',
size_hint_y=None,
font_size=35,
background_normal='',
background_color=(0, 1, 1, 0.5),
on_release=self.changer)
buttonWithoutDatabaseGrid.add_widget(backButton)
self.add_widget(buttonWithoutDatabaseGrid)
#if foodDatabase.txt exists read it and make it into dictionary
elif os.path.isfile('foodDatabase.txt') or \
len(eval(open('foodDatabase.txt', 'r').read())) >1:
data = eval(open('foodDatabase.txt',
'r').read()) #evaluate data into dictionary
nameList = list(data.keys(
)) #extract keys of nested dict to list -> names of foods
buttonGrid = GridLayout(cols=1,
id='btnGrid',
size_hint_y=None,
row_force_default=True,
row_default_height=200,
rows_minimum={
0: 100,
1: 100
},
spacing=15)
# when we add children to the grid layout, its size doesn't change at
# all. we need to ensure that the height will be the minimum required
# to contain all the childs. (otherwise, we'll child outside the
# bounding box of the childs)
buttonGrid.bind(minimum_height=buttonGrid.setter('height'))
backButton = Button(text='go back',
size_hint_y=None,
font_size=35,
background_normal='',
background_color=(0, 1, 1, 0.8),
on_release=self.changer)
removeTextInput = TextInput(text='',
font_size=45,
multiline=False,
on_text_validate=self.rmFoodInstant)
buttonGrid.add_widget(backButton)
buttonGrid.add_widget(removeTextInput)
# add buttons into above defined grid
for foodName in nameList:
#buttons loop to create as many buttons as food dictionary/foodDatabase.txt has foods
#in it
btn = ObjectProperty(None)
btn = Button(
text=str(foodName), #text of buttons is name of food
size=self.size,
font_size=45,
valign='center',
on_release=self.buttonPressIdentification)
# on button release buttonPressIdentification function is called
# which returnes the button instances text (buttontext)
buttonGrid.add_widget(btn) #add buttons to the gridlayout
btn.bind(on_release=(self.changer))
#bind button to an on_release event -> here screenchanger
btn.bind(on_release=(self.on_enter))
#bind buttons to the on_enter event which will input the saved food properties
#into the main input window
# create a scroll view, with a size < size of the grid
scrollingPanel = ScrollView(do_scroll_x=False)
#defining scrolling screen
scrollingPanel.add_widget(buttonGrid)
#add child to the ScreenView -> GridLayout
self.add_widget(scrollingPanel)
#add widget back to ScrollView? dont no exactly
else:
pass
