如何在Kivy中获取小部件在其布局中的位置? [英] How to get a widget position inside it's layout in Kivy?

问题描述

我有一个GridLayout，添加图像后在上面添加了一些图像小部件，我想通过使用画布在每个图像中绘制一个矩形，但是我不能，因为我不知道GridLayout上确切的图像小部件位置

I have a GridLayout and I added some Image widgets on it after adding of images I want to draw a rectangle in each image by using their canvas but I couldn't because I don't know the exact Image widgets positions on GridLayout.

在我的Python代码的最后一行:Rectangle(pos = (child.x - 2.4, child.y + 467), size = (70, 70))

In last line of my Python code : Rectangle(pos = (child.x - 2.4, child.y + 467), size = (70, 70))

如何在子级中绘制此矩形(我的方法不好^)，

How to draw this rectangle in child(My method is not good^),

为什么我的GridLayout设置为pos_hint = {"center_x" : .5}后也不能居中?

Also Why my GridLayout not coming in center after setting it's pos_hint = {"center_x" : .5}?

推荐答案

如果我理解正确的问题，请尝试使用诸如

If I understand question right, try to use such methods as to_local(), to_parent(), to_widget() and to_window(). Also you could try to subtract position of your GridLayout from Widgets' positions.

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