Question

我正在使用python 3.5和Kivy编写一个简单的时钟程序。

我需要列出员工，以便他们可以被选中，这样无论谁做工资单都可以了解员工的工作时间。

我已经查看了TreeView和RecycleView的文档，但在.kv文件中使用它们时，我似乎无法绕过其中任何一个。< / p>

那里有什么好的例子吗？我对Kivy很新，所以也许我错过了什么？我似乎无法找到关于这个主题的任何内容，除了“它比它需要的更复杂，没有人知道它是如何工作的。”

以下是我使用TreeView采用的一种方法，但我无法在TreeViewLabel s上的文本中应用颜色。基本上，我刚刚基于TreeView和TreeViewLabel类创建了新类：

class CustomTreeViewLabel(TreeViewLabel):
    """
    Custom TreeViewLabel for attaching database model instances to a node.
    """
    def __init__(self, user=None, **kwargs):
        super(CustomTreeViewLabel, self).__init__(**kwargs)
        self.user = user


class CustomTreeView(FloatLayout):
    """
    The CustomTreeView is what is used in place of a TreeView since they are useless
    inside of the .kv files.
    """
    def __init__(self, **kwargs):
        super(CustomTreeView, self).__init__(**kwargs)
        self.selected = None

        tree_view = TreeView(
            hide_root=True,
            indent_level=4
        )

        # Use Peewee ORM to grab the teams set up in database
        teams = [team for team in models.Team.select().execute()]

        for team in teams:
            # Create a node with no parent to the TreeView
            team_tree_label = TreeViewLabel(text=team.name)
            tree_view.add_node(team_tree_label)

            # Get users on the given team.
            users = [u for u in models.User.select().where(models.User.team_id == team.id)]
            for user in users:
                # Add the users full name as a TreeViewLabel with the team_tree_label as the parent node.
                user_text = '{} {}'.format(user.first_name, user.last_name)
                tree_view.add_node(CustomTreeViewLabel(user=user, text=user_text, on_touch_up=self.touch, color=(65, 207, 63, 1)), parent=team_tree_label)

        # Add the TreeView widget to the FloatLayout
        self.add_widget(tree_view)

    def touch(self, *args, **kwargs):
        """
        Handle a touch event on a child TreeViewLabel

        :param args:
        :param kwargs:
        :return:
        """

        tree_view_label, motion = args

        if tree_view_label.is_selected and self.selected != tree_view_label:
            # Set the selected label
            self.selected = tree_view_label
            print(tree_view_label.user.id)
            print(tree_view_label.text)

然后我刚刚在CustomTreeView文件中导入.kv并使用它：

#: import CustomTreeView views.CustomTreeView

<TimeClockApp>:
    do_default_tab: False
    tab_width: 200
    padding: 3
    TabbedPanelItem:
        text: 'Time Clock'
        BoxLayout:
            cols: 2
            CustomTreeView
            GridLayout:
                cols: 1
                spacing: 25
                padding: [50, 150, 50, 150]
                BoxLayout:
                    orientation: 'vertical'
                    Label:
                        text: ''
                Button:
                    size_hint: (2, .5)
                    text: 'Clock In'
                    size: (20, 20)
                    on_press: app.root.clock_in(*args)
                Button:
                    size_hint: (2, .5)
                    text: 'Clock Out'
                    size: (20, 20)

对于一些应该非常简单的事情来说，这看起来有点过分，我怀疑它会很好地扩展。

我该怎么做才能解决这个问题？这是人们通常如何在Kivy中制作数据列表吗？我真的不喜欢这样做。

如何在Kivy中使用TreeView和/或RecycleView？

0 个答案: