Question

我想使用DeployScreen从LogViewScreen更新变量。每个类都是我的NucleusPanel中的一个选项卡/子代，它继承了TabbedPanel。我注意到，当我迭代父类的孩子时（NucleusPanel），我只能看到我当前正在使用的孩子对孩子进行迭代。如何从任一选项卡访问父母的所有孩子？

class DeployScreen(RelativeLayout):
    def __init__(self, **kwargs):
        super(DeployScreen, self).__init__(**kwargs)
        ....
    def getTaskList(self, event, tasklist):
        for c in self.parent.children:
            print(c)
        # update LogViewScreen button text
        self.parent.ids.LogViewTab.selected_tasklist = tasklist
        ....


class LogViewScreen(RelativeLayout):
    selected_tasklist = StringProperty(" ")
    def __init__(self, **kwargs):
        super(LogViewScreen, self).__init__(**kwargs)
        # defaults
        self.canvas.clear()

        self.ViewingIndicatorBox = Button(
            text=self.selected_tasklist,
            size_hint=(1,None),
            size=(self.size),
            )

        self.ViewingIndicatorBox.disabled = True
        self.add_widget(self.ViewingIndicatorBox)
        return(None)

    pass

class NucleusPanel(TabbedPanel):
    def __init__(self, **kwargs):
        super(NucleusPanel, self).__init__(**kwargs)
        self.tab_pos = "top_left"
        self.tab_width = 265

        self.default_tab_text = "Deploy"
        self.default_tab.id ='DeployTab'
        self.default_tab_content = DeployScreen()

        self.lv_tab = TabbedPanelHeader(text='Log Viewer')
        self.lv_tab.id = 'LogViewTab'
        self.add_widget(self.lv_tab)
        self.lv_tab.content = LogViewScreen()

   pass


class NucleusApp(App):
    def build(self):
        return(NucleusPanel())

我希望能够从DeployScreen看到NucleusPanel下的所有孩子，但我只会看到DeployScreen：

<__main__.DeployScreen object at 0x000002262937DCE0>

Answer 1

您可以使用以下方法遍历tab_list来查看所有标签：

    for c in App.get_running_app().root.tab_list:
        print(c.content)

您可以在App中的任何位置使用它。

Answer 2

要从DeployScreen更新LogViewScreen中的ViewingIndicatorBox小部件，我只需为该按钮创建ID并使用收到的帮助，就可以遍历每个选项卡的内容并将搜索固定到Button实例的子项具有各自的ID。这是我的方法。

class DeployScreen(RelativeLayout):
    def __init__(self, **kwargs):
        super(DeployScreen, self).__init__(**kwargs)
        ....
    def getTaskList(self, event, tasklist):
        for c in NucleusApp.get_running_app().root.tab_list:
            if 'LogView' in str(c.content):
                for child in c.content.children:
                    if isinstance(child, Button) and child.id == 'VIB':
                        child.text = tasklist
                        ....

class LogViewScreen(RelativeLayout):
    selected_tasklist = StringProperty(" ")
    def __init__(self, **kwargs):
        super(LogViewScreen, self).__init__(**kwargs)
        # defaults
        self.canvas.clear()

        self.ViewingIndicatorBox = Button(
            id='VIB',
            text='Current running log - {}'.format(self.selected_tasklist),
            size_hint=(1,None),
            size=(self.size),
            background_normal='',
            background_color=[0.18, 0.18, 0.31, 1],
            pos_hint={'top':1},
            height=50
            )

无法看到单身孩子KIVY的父母孩子

2 个答案: