问题描述
我对Kivy listview和Pandas数据框有疑问.具体来说，如何从.xlsx到kivy的listview中列出数据，然后说删除选定的条目.这是我的主要代码:
I have a question regarding Kivy listview and Pandas dataframes. Specifically how to list data from .xlsx to listview of kivy and then lets say delete selected entry.This is my main code:
import pandas
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.uix.listview import ListItemButton
class ItemsListItemButton(ListItemButton):
pass
class QuestionDb(BoxLayout):
items_list = ObjectProperty()
def dataframe(self):
df = pandas.read_excel("items.xlsx")
return df
class QuestionApp(App):
def build(self):
return QuestionDb()
Questionapp= QuestionApp()
Questionapp.run()
这是用来获取列表视图和按钮的question.kv文件
This is question.kv file used to get the listview and button
#: import main question
#: import ListAdapter kivy.adapters.listadapter.ListAdapter
#: import LitsItemButton kivy.uix.listview.ListItemButton
QuestionDb:
<QuestionDb>:
items_list: items_list_view
ListView:
id:items_list_view
adapter:
ListAdapter(data=main.QuestionDb.dataframe(self) ,
cls=main.ItemsListItemButton)
Button:
text: "Deletes selected entry on press"
这是我们设置为数据框的excel电子表格"items.xlsx":
And this is the excel spreadsheet "items.xlsx" which we set as our dataframe:
Item: Cost: Remaining:
Boots 10$ 5
Socks 2$ 4
Hats 5$ 10
现在，此设置列表视图以kivy形式仅显示列名称，并且不列出其他任何项目，我该如何使它列出，例如:
Now with this setup listview in kivy only shows the column names and lists no other items, how can i make it so that items are listed example:
Boots 10$ 5
Socks 2$ 4
Hats 5$ 10
代替这个
关于如何将按钮链接到之后删除所选条目的任何提示，也将不胜感激.
Also any tips on how to link the button to afterwards delete the selected entry would be appreciated as well.
希望这是有道理的.
推荐答案
您应使用Recycleview，因为从1.10.0版开始不推荐使用Listview .
You should use Recycleview because Listview has been deprecated since version 1.10.0.
在下面的示例中，我们使用了 Recycleview 和可选择的按钮回收网格布局. Recycleview支持向上和向下滚动.我们已经将按钮与 on_release 事件绑定了.您还可以更改按钮以绑定 on_press 事件.单击任何行将调用方法 delete_row .
In the example below, we are using a Recycleview with selectable recycle grid layout of buttons. Recycleview supports scrolling up and down. We have binded the button with on_release event. You can also change the button to bind on_press event. Click on any row will invoke the method, delete_row.
import pandas
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.button import Button
from kivy.properties import BooleanProperty, ListProperty, ObjectProperty
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
from kivy.core.window import Window
class SelectableRecycleGridLayout(FocusBehavior, LayoutSelectionBehavior,
RecycleGridLayout):
''' Adds selection and focus behaviour to the view. '''
class SelectableButton(RecycleDataViewBehavior, Button):
''' Add selection support to the Label '''
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(SelectableButton, self).refresh_view_attrs(
rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(SelectableButton, 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
class QuestionDb(BoxLayout):
items_list = ObjectProperty(None)
column_headings = ObjectProperty(None)
rv_data = ListProperty([])
def __init__(self, **kwargs):
super(QuestionDb, self).__init__(**kwargs)
self.get_dataframe()
def get_dataframe(self):
df = pandas.read_excel("items.xlsx")
# Extract and create column headings
for heading in df.columns:
self.column_headings.add_widget(Label(text=heading))
# Extract and create rows
data = []
for row in df.itertuples():
for i in range(1, len(row)):
data.append([row[i], row[0]])
self.rv_data = [{'text': str(x[0]), 'Index': str(x[1]), 'selectable': True} for x in data]
def delete_row(self, instance):
# TODO
print("delete_row:")
print("Button: text={0}, index={1}".format(instance.text, instance.index))
print(self.rv_data[instance.index])
print("Pandas: Index={}".format(self.rv_data[instance.index]['Index']))
class QuestionApp(App):
def build(self):
Window.clearcolor = (1, 1, 1, 1) # white background
return QuestionDb()
if __name__ == "__main__":
QuestionApp().run()
question.kv
#:kivy 1.10.0
<SelectableButton>:
# Draw a background to indicate selection
canvas.before:
Color:
rgba: (0, 0.517, 0.705, 1) if self.selected else (0, 0.517, 0.705, 1)
Rectangle:
pos: self.pos
size: self.size
background_color: [1, 0, 0, 1] if self.selected else [1, 1, 1, 1] # dark red else dark grey
on_release: app.root.delete_row(self)
<QuestionDb>:
column_headings: column_headings
orientation: "vertical"
Label:
canvas.before:
Color:
rgba: (0, 0, 1, .5) # 50% translucent blue
Rectangle:
pos: self.pos
size: self.size
text: 'Click on any row to delete'
size_hint: 1, 0.1
GridLayout:
canvas.before:
Color:
rgba: (1, 0.2, 0, .5) # 50% translucent orange red
Rectangle:
pos: self.pos
size: self.size
id: column_headings
size_hint: 1, None
size_hint_y: None
height: 25
cols: 3
BoxLayout:
canvas.before:
Color:
rgba: (.0, 0.9, .1, .3)
Rectangle:
pos: self.pos
size: self.size
RecycleView:
viewclass: 'SelectableButton'
data: root.rv_data
SelectableRecycleGridLayout:
cols: 3
key_selection: 'selectable'
default_size: None, dp(26)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
multiselect: True
touch_multiselect: True
输出
这篇关于Kivy Listview Excel文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！