Kivy制作自定义TreeViewNode [英] Kivy Making a Custom TreeViewNode

问题描述

我正在尝试创建一个自定义TreeViewNode来与TreeView一起使用. 只是想要一张带有标签的图像，仅此而已.

I'm attempting to create a custom TreeViewNode to use with a TreeView. Just want an image with a label next to it, nothing more.

然而，尝试创建自定义节点...甚至在源中复制它的操作也不会产生相同的结果.

Yet attempting to create a custom node... even replicating how it's done in the source doesn't yield the same results.

TreeViewlabel实际上只是一个带有注释的类声明

TreeViewlabel is literally just a class declaration with a comment in it

class TreeViewLabel(Label, TreeViewNode):
'''there's just a comment here'''

这是我用于比较的TreeViewLabel版本

This is my version of the TreeViewLabel for comparison

class TreeViewImageLabel(Label, TreeViewNode):
"""oh boy this is a comment"""

尝试创建此代码的复本并将其添加到树中会产生以下结果.我的版本是第一个标签，后续的标签是默认的TreeViewLabel

Well attempting to create a carbon copy of this code and adding it to a tree yields the following. My version is the first label, and the subsequent labels are the default TreeViewLabel

全部隔开，未对齐且巨大.没有kivy附带的TreeViewLabel整洁.

It's all spaced out, un-aligned and huge. Nothing as neat and tidy as the TreeViewLabel that comes with kivy.

到底发生了什么?它不仅看上去不像TreeViewLabel，而且尝试用size，size_hints，pos等配置小部件，也不会从该标签相对于树的位置动摇标签.

What the heck is going on? Not only does it look nothing like the TreeViewLabel, but attempting to configure the widget with size, size_hints, pos, etc. does nothing to budge that label from where it is relative to the tree.

我最初的计划是让我的节点从具有图像和标签的boxlayout继承，但是随着自定义节点的大小确定，鉴于我现在所知道的，不可能获得任何看起来像TreeViewNode的东西.

My original plan was to have my node inherit from a boxlayout with an image and label stuck in it, but with the sizing of custom nodes it's impossible to get anything that looks like a TreeViewNode given what I know right now.

因此这是实施修补程序后的样子:

So this is how it looks with the fix implemented:

对于其他想要像我一样制作带有图片和标签的TreeViewNode的人，这是使它起作用的代码:

For anyone else looking to make a TreeViewNode with a picture and label as I've done, this is the code that got it working:

#python
class TreeViewImageLabel(BoxLayout, TreeViewNode):
    pass

.kv

#kivy language
<TreeViewImageLabel>:
height: max(lbl.texture_size[1] + dp(10), dp(24))

    Image:
        size: (max(lbl.texture_size[1] + dp(10), dp(24)), max(lbl.texture_size[1] + dp(10), dp(24)))
        size_hint: (.05, 1)
        id:img
        source: "smiley.png"
    Label:
        size_hint: (.9, 1)
        id:lbl
        text_size: self.width, None
        text: "test"

推荐答案

您仅复制了TreeViewLabel类的一部分.您重新创建了Python类，但是还有一个 kv规则:

You've only copied part of the TreeViewLabel class. You recreated the Python class, but there is also a kv rule which is applied as well:

<TreeViewLabel>:
    width: self.texture_size[0]
    height: max(self.texture_size[1] + dp(10), dp(24))
    text_size: self.width, None

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