recycleview 自动选择最后一个项目我希望它自己选择第一个项目 如果我点击任何其他或第一个它应该改变所选项目的 bcolor。 而且无论我在“pos_hint：”中输入什么值，它都不会改变文本框和按钮的位置。 我也尝试将这些属性放入 Gridlayout 但没有任何变化
.py 代码
class SelectableRecycleBoxLayout(FocusBehavior, LayoutSelectionBehavior,
RecycleGridLayout):
''' Adds selection and focus behaviour to the view. '''
class SelectableLabel(RecycleDataViewBehavior, Label):
''' Add selection support to the Label '''
index = None
selected = BooleanProperty(False)
selectable = BooleanProperty(True)
txt_input = ObjectProperty(None)
stock_name = ObjectProperty(None)
stock_symbol = ObjectProperty(None)
purchase_price = ObjectProperty(None)
stop_loss = ObjectProperty(None)
bcolor = ListProperty([0, 1, 1, 1])
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super(SelectableLabel, self).refresh_view_attrs(
rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(SelectableLabel, 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:
# App.get_running_app().root.widget_1.ids.txt_input1.text = str(rv.data[index].get("text"))
xx =str(rv.data[index].get("text"))
if (xx.find('(NSI)') != -1):
x,y = xx.split(" (NSI)")
add_sym = '.NS'
else:
x,y = xx.split(" (BSE)")
add_sym = '.BO'
print(xx)
print(x)
App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_name.text = x
f = pd.read_csv("Stock Tickers.csv", encoding="ISO-8859-1", engine='python')
fl = len(f.index)
file = pd.DataFrame(f, columns=['Symbols', 'Name', 'Exchange'])
for i in range(fl):
for index in range(1):
columnSeriesObj_sym = file.iloc[:, 0]
columnSeriesObj1 = file.iloc[:, 1]
columnSeriesObj_ex = file.iloc[:, 2]
before_sym,b = columnSeriesObj_sym.values[i].split('.')
if columnSeriesObj1.values[i] == App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_name.text:
App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_symbol.text = before_sym + add_sym
class RV(RecycleView):
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
class DropDownWidget(GridLayout):
txt_input = ObjectProperty()
rv = ObjectProperty()
stock_name = ObjectProperty(None)
stock_symbol = ObjectProperty(None)
purchase_price = ObjectProperty(None)
stop_loss = ObjectProperty(None)
def btn_input(self):
end = datetime.today().date()
start = end
print("Stock Name:", App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_name.text,
"Stock Symbol:", App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_symbol.text)
print("Purchase Price:", App.get_running_app().root.get_screen('body_screen').widget_1.ids.purchase_price.text,
"Stop Loss(%):", App.get_running_app().root.get_screen('body_screen').widget_1.ids.stop_loss.text)
# write data to csv file
file_name = username + "_stoploss.csv"
if path.exists(file_name):
with open(file_name, "a+", newline='')as newFile:
fieldnames = ["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"]
newFileWriter = csv.DictWriter(newFile, fieldnames=fieldnames)
newFileWriter.writerow({"Stock Name": App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_name.text,
"Stock Symbol": App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_symbol.text,
"Purchase Price": App.get_running_app().root.get_screen('body_screen').widget_1.ids.purchase_price.text,
"Stop Loss(%)": App.get_running_app().root.get_screen('body_screen').widget_1.ids.stop_loss.text})
else:
myFile = open(file_name, 'w+',newline='')
myData = [["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"],
[App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_name.text,
App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_symbol.text,
App.get_running_app().root.get_screen('body_screen').widget_1.ids.purchase_price.text,
App.get_running_app().root.get_screen('body_screen').widget_1.ids.stop_loss.text]]
with myFile:
writer = csv.writer(myFile)
writer.writerows(myData)
df = web.DataReader(App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_symbol.text, 'yahoo', start, end)
print(df.tail())
App.get_running_app().root.get_screen('body_screen').widget_1.ids.txt_input.text = ""
App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_name.text = ""
App.get_running_app().root.get_screen('body_screen').widget_1.ids.stock_symbol.text = ""
App.get_running_app().root.get_screen('body_screen').widget_1.ids.purchase_price.text = ""
App.get_running_app().root.get_screen('body_screen').widget_1.ids.stop_loss.text = ""
class MyTextInput(TextInput):
txt_input = ObjectProperty()
flt_list = ObjectProperty()
word_list = ListProperty()
stock_name = ObjectProperty(None)
stock_symbol = ObjectProperty(None)
purchase_price = ObjectProperty(None)
stop_loss = ObjectProperty(None)
# this is the variable storing the number to which the look-up will start
starting_no = NumericProperty()
suggestion_text = ''
def __init__(self, **kwargs):
super(MyTextInput, self).__init__(**kwargs)
def on_text(self, instance, value):
# find all the occurrence of the word
self.parent.parent.ids.rv.data = []
if len(value) != 0:
matches = [word for word in self.word_list if word.lower().find(value.lower()) != -1]
# display the data in the recycleview
display_data = []
for i in matches:
display_data.append({'text': i})
self.parent.parent.ids.rv.data = display_data
# ensure the size is okay
if len(matches) <= 10:
self.parent.height = (50 + (len(matches) * 20))
else:
self.parent.height = 240
def keyboard_on_key_down(self, window, keycode, text, modifiers):
if self.suggestion_text and keycode[1] == 'tab':
self.insert_text(self.suggestion_text + ' ')
return True
return super(MyTextInput, self).keyboard_on_key_down(window, keycode, text, modifiers)
class Body(Screen):
def __init__(self, **kwargs):
super(Body, self).__init__(**kwargs)
f = pd.read_csv("Stock Tickers.csv", encoding = "ISO-8859-1", engine='python')
fl = len(f.index)
file = pd.DataFrame(f, columns=['Symbols', 'Name', 'Exchange'])
wl = []
for i in range(fl):
for index in range(1):
columnSeriesObj = file.iloc[:, 1]
self.columnSeriesObj_ex = file.iloc[:, 2]
wl.append(columnSeriesObj.values[i] + " (" + self.columnSeriesObj_ex.values[i] + ")")
tp = tuple(wl)
print("File is loaded")
self.widget_1 = DropDownWidget(pos_hint={'center_x': .5, 'center_y': .5},
size_hint=(None, None), size=(600, 60))
self.widget_1.ids.txt_input.word_list = wl
self.widget_1.ids.txt_input.starting_no = 3
self.add_widget(self.widget_1)
.kv 代码
<Body>:
name: 'body_screen'
canvas.before:
Color:
rgba: 188/255, 143/255, 145/255, 1
Rectangle:
pos: self.pos
size: self.size
<DropDownWidget>:
cols:3
id: DropDownWidget
size_hint:(0.5,1)
pos_hint: {'center_x': 50.5, 'center_y': 1.5}
row_force_default : True
row_default_height : 200
col_force_default : True
col_default_width : 550
spacing: '20dp'
GridLayout:
canvas:
Color:
rgba:(1, 1, 1, 1)
cols:2
stock_name: stock_name
stock_symbol: stock_symbol
purchase_price: purchase_price
stop_loss: stop_loss
txt_input: txt_input
rv: rv
MyTextInput:
id: txt_input
RV:
id: rv
Label:
text: "Stock Name: "
TextInput:
id: stock_name
readonly: True
multiline:False
Label:
text: "Stock Symbol: "
TextInput:
id: stock_symbol
readonly: True
multiline:False
Label:
text: "Purchase Price: "
TextInput:
id: purchase_price
input_filter: 'int'
multiline:False
Label:
text: "Stop Loss(%): "
TextInput:
id: stop_loss
input_filter: 'int'
multiline:False
Button:
text:"Submit"
on_press: root.btn_input()
Button:
text:"Back"
on_press: root.parent.manager.current = 'option_screen'
<MyTextInput>:
id: MyTextInput
readonly: False
multiline: False
<SelectableLabel>:
id: SelectableLabel
bcolor: root.bcolor
# Draw a background to indicate selection
color: 0,0,0,1
canvas.before:
Color:
rgba: (1, 1, 1, .5) if self.selected else self.bcolor
Rectangle:
# pos: self.pos
size: self.size
<RV>:
canvas:
Color:
rgba: 0,0,0,.2
Line:
rectangle: self.x +3 , self.y, self.width - 2, self.height -2
bar_width: 20
scroll_type:['bars']
viewclass: 'SelectableLabel'
SelectableRecycleBoxLayout:
cols:1
default_size: None, dp(20)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
multiselect: False
答案 0 :(得分：0)
最后我解决了它。 在弄乱了代码之后，我终于找到了它。这是一个简单的解决方案
只需更改kv代码
来自
<SelectableLabel>:
id: SelectableLabel
bcolor: root.bcolor
# Draw a background to indicate selection
color: 0,0,0,1
canvas.before:
Color:
rgba: (1, 1, 1, .5) if self.selected else self.bcolor
Rectangle:
# pos: self.pos
size: self.size
到
<SelectableLabel>:
id: SelectableLabel
canvas.after:
Color:
rgba: (.0, 0.9, .1, .3) if self.selected else (1, 1, 1, .1)
Rectangle:
pos: self.pos
size: self.size