Kivy定制可关闭标签

Question

我试图在kivy中实现一个自定义的可关闭的tab头。在

我做的是把类：TabbedPanelHeader对象有一个习惯类：CloseButton对象。这两个小部件都位于类别：BoxLayout，并排。在

但是，一旦我将此添加到类：TabbedPanel对象，什么也没出现。。 我不知道如何前进，将非常感谢所有的帮助！在

以下是代码的相关部分。在

from kivy.uix.behaviors import ButtonBehavior
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.image import Image
from kivy.graphics import *
from kivy.uix.tabbedpanel import TabbedPanelHeader

class CloseButton(ButtonBehavior, Image):
    def __init__(self, **kwargs):
        super(CloseButton, self).__init__(**kwargs)
        self.source = 'atlas://data/images/defaulttheme/close'
        self.size_hint_x = .2

    def on_press(self):
        self.source = 'atlas://data/images/defaulttheme/checkbox_radio_off'

    def on_release(self):
        self.source = 'atlas://data/images/defaulttheme/checkbox_radio_off'
        ## do the actual closing of the tab

class ClosableTabHeader(BoxLayout):
    def __init__(self, **kwargs):
        super(ClosableTabHeader, self).__init__(**kwargs)
        self.size = (100, 30)
        self.size_hint = (None, None)
        self.canvas.before.add(Color(.25, .25, .25))
        self.canvas.before.add(Rectangle(size=(105, 30)))
        self.add_widget(TabbedPanelHeader(background_color=(.65, .65, .65, 0), text='testing'))
        self.add_widget(CloseButton())


if __name__ == '__main__':
    from kivy.app import App

    class TestApp(App):
        def build(self):
            return ClosableTabHeader()

    TestApp().run()

Answer 1

下面是一些代码，它们接近于实现您要实现的目标

from kivy.app import App
from kivy.animation import Animation
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.tabbedpanel import TabbedPanel, TabbedPanelHeader
from kivy.factory import Factory
from kivy.lang import Builder


class CloseableHeader(TabbedPanelHeader):
    pass

class TestTabApp(App):
    def build(self):
        return Builder.load_string('''
TabbedPanel:
    do_default_tab: False
    FloatLayout:
        BoxLayout:
            id: tab_1_content
            Label:
                text: 'Palim 1'
        BoxLayout:
            id: tab_2_content
            Label:
                text: 'Palim 2'
        BoxLayout:
            id: tab_3_content
            Label:
                text: 'Palim 3'


    CloseableHeader:
        text: 'tab1'
        panel: root
        content: tab_1_content.__self__
    CloseableHeader:
        text: 'tab2'
        panel: root
        content: tab_2_content.__self__
    CloseableHeader:
        text: 'tab3'
        panel: root
        content: tab_3_content.__self__


<CloseableHeader>
    color: 0,0,0,0
    disabled_color: self.color
    # variable tab_width
    text: 'tabx'
    size_hint_x: None
    width: self.texture_size[0] + 40
    BoxLayout:
        pos: root.pos
        size_hint: None, None
        size: root.size
        padding: 3
        Label:
            id: lbl
            text: root.text
        BoxLayout:
            size_hint: None, 1
            orientation: 'vertical'
            width: 22
            Image:
                source: 'tools/theming/defaulttheme/close.png'
                on_touch_down:
                    if self.collide_point(*args[1].pos) :\
                        root.panel.remove_widget(root); \

''')


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

它基于https://github.com/kivy/kivy/blob/master/examples/widgets/tabbed_panel_showcase.py