以編程方式在手風琴中切換「選項卡」

Question

我想在文件按下加載文件按鈕時切換「選項卡」，這意味着文件加載完成後應切換到第二個AccordionItem。我怎樣才能以編程方式做到這一點？

42  Accordion:                 
43   orientation: 'horizontal'            
44   anim_duration: 2               
45                     
46   AccordionItem:               
47    title: 'Load File'.title()           
48    Page:                
49     Header:               
50      text: 'Load File'.title()         
51     Body:               
52      BoxLayout:             
53       orientation: 'vertical'         
54                     
55       FileChooser:                                        
56        id: _filechooser          
57        dirselect: False          
58        multiselect: False         
59        show_hidden: False         
60        path: '~/'           
61        filters: ['*.[Zz][Ii][Pp]', '*.[Xx][Mm][Ll]']  
62        FileChooserIconLayout        
63                     
64       Button:             
65        height: '48dp'          
66        size_hint_y: None         
67        text: 'Load'.title()         
68        on_release: root.load(_filechooser.path, _filechooser.selection) 
69                     
70     Footer:               
71      text: 'Choose file to load…'         
72                     
73   AccordionItem:               
74    title: 'Dmarc Report'.title()          
75    Page:                
76     Header:               
77      text: 'Dmarc Report'.title()         
78     Body:               
79     Footer:               
80      text: 'Viewing currently loaded file…' 

Answer 1

您可以使用dispatch()方法模擬點擊AccordionItem：

from kivy.app import App 
from kivy.uix.boxlayout import BoxLayout 
from kivy.lang import Builder 

Builder.load_string(''' 
<MyWidget>: 
    orientation: "vertical" 
    Button: 
     text: "switch" 
     size_hint: 1, 0.1 
     on_press: 
      if item1.collapse: item1.dispatch('on_touch_down', item1) 
      else: item2.dispatch('on_touch_down', item2) 
    Accordion: 
     AccordionItem: 
      id: item1 
      title: "1" 
      Label: 
       text: "1" 
     AccordionItem: 
      id: item2 
      title: "2" 
      Label: 
       text: "2" 
''') 


class MyWidget(BoxLayout): 
    pass 

class MyApp(App): 
    def build(self):   
     return MyWidget() 

if __name__ == '__main__': 
    MyApp().run()