问题
I want to put the data of a (csv-)table into a kivy recycleview.
I managed to insert multiple columns with one row, if i assign a fixed text to the Labels in the kv, but i can't get it to fill the labels with data from a dictionary list. This is the code so far, that i use to test the concept:
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.recycleview import RecycleView
from kivy.uix.boxlayout import BoxLayout
import csv
items = [{'SP1': 'Artikelnummer', 'SP2': 'Name', 'SP3': 'Groesse'},
{'SP1': '510001', 'SP2': 'Big Pump', 'SP3': '1.50 L'},
{'SP1': '523001', 'SP2': 'Leonie Still', 'SP3': '1.50 L'},
{'SP1': '641301', 'SP2': 'Cola Mix', 'SP3': '1.50 L'}
]
class Tabelle(BoxLayout):
def __init__(self, **kwargs):
super(Tabelle, self).__init__(**kwargs)
def insert_SP(self, data):
for i in data:
self.spalte1_SP = i['SP1']
#print(self.spalte1_SP)
self.spalte2_SP = i['SP2']
self.spalte3_SP = i['SP3']
Builder.load_string('''
<Tabelle>:
orientation: 'horizontal'
spalte1_SP: 'spalte1'
spalte2_SP: 'spalte2'
spalte3_SP: 'spalte3'
Label:
id: Spalte1
text: root.spalte1_SP
Label:
id: Spalte2
text: root.spalte2_SP
Label:
id: Spalte3
text: root.spalte3_SP
<RV>:
viewclass: 'Tabelle'
RecycleBoxLayout:
default_size: None, dp(20)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
''')
class RV(RecycleView):
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
#self.data = []
x = Tabelle()
x.insert_SP(items)
class TestApp(App):
def build(self):
return RV()
if __name__ == '__main__':
TestApp().run()
I expect to see the data from items in 3 columns, but they stay empty for some reason.
回答1:
It is empty because data
was not populated.
Solution
- Remove all codings in
class Tabelle()
- Add
pass
intoclass Tabelle()
- Add the following into constructor,
__init__()
ofclass RV()
Snippets
self.data = [{'spalte1_SP': str(x['SP1']), 'spalte2_SP': str(x['SP2']), 'spalte3_SP': str(x['SP3'])} for x in items]
Kivy RecycleView » data
The view is generatad by processing the data, essentially a list of dicts, and uses these dicts to generate instances of the viewclass as required.
data
The data used by the current view adapter. This is a list of dicts whose keys map to the corresponding property names of the viewclass.
data is an AliasProperty that gets and sets the data used to generate the views.
Example
main.py
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.recycleview import RecycleView
from kivy.uix.boxlayout import BoxLayout
items = [{'SP1': 'Artikelnummer', 'SP2': 'Name', 'SP3': 'Groesse'},
{'SP1': '510001', 'SP2': 'Big Pump', 'SP3': '1.50 L'},
{'SP1': '523001', 'SP2': 'Leonie Still', 'SP3': '1.50 L'},
{'SP1': '641301', 'SP2': 'Cola Mix', 'SP3': '1.50 L'}
]
class Tabelle(BoxLayout):
pass
Builder.load_string('''
<Tabelle>:
orientation: 'horizontal'
spalte1_SP: 'spalte1'
spalte2_SP: 'spalte2'
spalte3_SP: 'spalte3'
Label:
id: SP1
text: root.spalte1_SP
Label:
id: SP2
text: root.spalte2_SP
Label:
id: SP3
text: root.spalte3_SP
<RV>:
viewclass: 'Tabelle'
RecycleBoxLayout:
default_size: None, dp(20)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
''')
class RV(RecycleView):
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
self.data = [{'spalte1_SP': str(x['SP1']), 'spalte2_SP': str(x['SP2']), 'spalte3_SP': str(x['SP3'])} for x in items]
class TestApp(App):
def build(self):
return RV()
if __name__ == '__main__':
TestApp().run()
Output
来源:https://stackoverflow.com/questions/55692120/how-to-put-multiple-columns-into-a-kivy-recycleview