我有一个只包含文本框的循环视图。当您在文本框中键入内容时,向下滚动并向上滚动文本将会消失。
我尝试更新循环视图的数据列表但是当我滚动它时再次重置它。我只用循环视图制作了一个单独的程序来尝试实验。
from kivy.app import App
from kivy.uix.recycleview import RecycleView
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.properties import ObjectProperty, ListProperty
from kivy.clock import Clock
Builder.load_string('''
<Row>:
canvas.before:
Color:
rgba: 0.5, 0.5, 0.5, 1
Rectangle:
size: self.size
pos: self.pos
itemText: ''
TextInput:
id:CellText
text:root.itemText
<Row2>
canvas.before:
Color:
rgba: 0.5, 0.5, 0.5, 1
Rectangle:
size: self.size
pos: self.pos
itemText: ''
TextInput:
id:CellText
text:root.itemText
TextInput:
id:CellText
text:root.itemText2
<RV>:
id: rv
viewclass: 'Row'
pos: 10,-50
scroll_type: ['bars', 'content']
scroll_wheel_distance: dp(114)
bar_width: dp(10)
RecycleGridLayout:
cols:6
default_size: None, dp(30)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
spacing: dp(1)
''')
class RV(RecycleView):
list_items = ListProperty([])
numRows = 16
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
self.data = [{'itemText': "1", 'paren': self, 'index':0},
{'itemText': "1", 'paren': self, 'index':0},
{'itemText': '0','paren': self, 'index':2},
{'itemText': "1", 'paren': self, 'index':0},
{'itemText': '0','paren': self, 'index':2},
{'itemText': '0','paren': self, 'index':2}]
for x in range(2,32):
self.data.extend([{'itemText': str(x), 'paren': self, 'index':6}])
self.data.extend([{'itemText': "1", 'paren': self, 'index':6}])
self.data.extend([{'itemText': "0", 'paren': self, 'index': 6}])
self.data.extend([{'itemText': "1", 'paren': self, 'index':6}])
self.data.extend([{'itemText': "0", 'paren': self, 'index': 6}])
self.data.extend([{'itemText': "0", 'paren': self, 'index': 6}])
def which_edit(self, *args):
'''This will print the index of the box which is currently edited'''
#print args[0].parent.index
class Row(BoxLayout):
paren = ObjectProperty() #the instance of the rv
def __init__(self, **kwargs):
super(Row, self).__init__(**kwargs)
Clock.schedule_once(self.update)
def update(self, *args):
self.paren.list_items.append(self)
self.ids.CellText.bind(text=self.paren.which_edit)
class TestApp(App):
def build(self):
return RV()
if __name__ == '__main__':
TestApp().run()
我尝试更新循环视图的数据列表但是当我滚动它时再次重置它。
无论在TextInput中输入什么都不会反映在self.data
中。因此,只要有滚动,TextInput就会从self.data
刷新。
覆盖了index
,例如{'itemText': "1", 'paren': self, 'index':0},
index
是RecycleView的保留属性。它用于标识列中的每个单元格。
只要TextInput有任何更改,就更新self.data。
TextInput:
id:CellText
text:root.itemText
on_text:
app.root.data[root.index]['itemText'] = self.text
用index
替换Index
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
self.data = [{'itemText': "1", 'paren': self, 'Index': 0},
{'itemText': "1", 'paren': self, 'Index': 0},
{'itemText': '0', 'paren': self, 'Index': 2},
{'itemText': "1", 'paren': self, 'Index': 0},
{'itemText': '0', 'paren': self, 'Index': 2},
{'itemText': '0', 'paren': self, 'Index': 2}]
for x in range(2, 32):
self.data.extend([{'itemText': str(x), 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "1", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "0", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "1", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "0", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "0", 'paren': self, 'Index': 6}])
from kivy.app import App
from kivy.uix.recycleview import RecycleView
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.properties import BooleanProperty
Builder.load_string('''
<Row>:
canvas.before:
Color:
rgba: 0.5, 0.5, 0.5, 1
Rectangle:
size: self.size
pos: self.pos
itemText: ''
TextInput:
id:CellText
text:root.itemText
on_text:
#root.which_edit(args)
app.root.data[root.index]['itemText'] = self.text
<RV>:
id: rv
viewclass: 'Row'
pos: 10,-50
scroll_type: ['bars', 'content']
scroll_wheel_distance: dp(114)
bar_width: dp(10)
RecycleGridLayout:
cols:6
default_size: None, dp(30)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
spacing: dp(1)
''')
class Row(RecycleDataViewBehavior, BoxLayout):
pass
index = None
selected = BooleanProperty(False)
selectable = BooleanProperty(True)
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super(Row, self).refresh_view_attrs(
rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(Row, self).on_touch_down(touch):
return True
if self.collide_point(*touch.pos) and self.selectable:
return self.parent.select_with_touch(self.index, touch)
def apply_selection(self, rv, index, is_selected):
''' Respond to the selection of items in the view. '''
self.selected = is_selected
if is_selected:
print("selection changed to {0}".format(rv.data[index]))
else:
print("selection removed for {0}".format(rv.data[index]))
def which_edit(self, *args):
'''This will print the index of the box which is currently edited'''
print(f'args={args}')
class RV(RecycleView):
numRows = 16
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
self.data = [{'itemText': "1", 'paren': self, 'Index': 0},
{'itemText': "1", 'paren': self, 'Index': 0},
{'itemText': '0', 'paren': self, 'Index': 2},
{'itemText': "1", 'paren': self, 'Index': 0},
{'itemText': '0', 'paren': self, 'Index': 2},
{'itemText': '0', 'paren': self, 'Index': 2}]
for x in range(2, 32):
self.data.extend([{'itemText': str(x), 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "1", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "0", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "1", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "0", 'paren': self, 'Index': 6}])
self.data.extend([{'itemText': "0", 'paren': self, 'Index': 6}])
class TestApp(App):
def build(self):
return RV()
if __name__ == '__main__':
TestApp().run()