treeview | Android TreeView implemented by RecyclerView | RecyclerView library

I have a material ui v4 treeview that is working fine with react-dnd using the code below.

When I upgrade to mui v5 treeview, the drag does not work anymore, the item is no longer draggable.

I had a look between the 2 TreeItem implementation but there is a lot of change and I am lost.

https://github.com/mui-org/material-ui/blob/v4.x/packages/material-ui-lab/src/TreeItem/TreeItem.js

https://github.com/mui-org/material-ui/blob/master/packages/mui-lab/src/TreeItem/TreeItem.js

What am I missing? Many thanks for your answers :)

In the code below, I have a Treeview and a button. Whenever an item in the Treeview is selected, I want the button to appear, when ever the button is pressed, I want to deselect the selected Treeview item, and then have the button disappear.

This almost works. What is happening is the Treeview selection is deselected whenever the button is pressed, but it does not disappear. If the button is then pressed a second time (with nothing selected in the Treeview) it will disappear.

When I was debugging this I can see that the table_row_selected function would be called when the clear_selection function ran. I assume this has something to do with the table.selection_remove activating the binding on table

Any ideas how I could get this functionality to work?

I am developing an app for myself that (in this case) displays a list of items. However, this list of items takes about 10 seconds to pull, so in the meantime, I would like to show the user a loading screen. Currently, my program uses the place method to place, and then remove a gif (animated using a custom image class), like this:

and fully loaded:

However, I have another frame (in the notebook- you can see the tabs) that I will eventually code to have content and an independent loading image (it will start/stop at different times than the first tab). However, when I move to the second tab while the first tab is loading, the place manager unwantedly keeps the image there:

How can I get this image to only display on the first tab but not the second? Since this is a project for myself, I am not focused on perfection, and if necessary, I will most likely just add a text element to the treeview stating it is loading (the other frame will also have a treeview too). I would also rather not learn a new language (I know some java and JS but python is my strength), because, as I said before, this is just a hobby for me.

Here is a minimal reproducible example. The code needs one file in the same directory (img.png) to run. You will notice that the loading image will be present in both tab1 and tab2, even though tab2 already has data.

Tried to replace text heading by image heading in ttk.Treeview, but image always align right. How can I align the image to center of heading ?

Here, image is a small blue box for demo only, most of time, the size of image always smaller than column size.

I used the MDBootstrap solution for the Tree view in my ASP .NET Core Web application. On this LINK is the detailed tutorial how to insert the treeview into my project. As far This is all I have.

I list the data I pulled from the database in treeview. But I have one question. I have a city, county and neighborhood table. I write the districts of the selected province and the neighborhoods of the selected district on the table. There is no problem in printing one by one, but when we select a lot of data (all), this process takes about 17 minutes to run on the network. When I remove my hand from the All key, new data is constantly coming due to the request to the wep api.

What comes to my mind as a solution to this is;

Stopping the network when we stop selecting the All button. Making the user wait using the site by adding a 20-minute delay. (it doesn't make any sense.)

How do I change the white colour zone in this tkinter GUI to a different color?

I tried making the change via ttk.Style, however, it did not work.

Below is my test code.

I needed to get the root item of a TreeView. The obvious way to get it is to use the getRoot() on the TreeView. Which I use.

I like to experiment, and was wondering if I can get same root, buy climbing up the tree from a leaf item (a TreeItem), using recursively getParent() until the result is NULL.

It is working as well, and, in my custom TreeItem, I added a public method 'getRoot()' to play around with it. Thus finding out this method does already exist in parent TreeItem, but is not exposed.

My question : Why would it not be exposed ? Is is a bad practice regarding OOP / MVC architecture ?

Is there a way that the alternative row colouring can be maintained after sorting? My treeview has 2,000+ rows and would like to know if there is any solution other than retagging all the rows each time a column is sorted. When you click on any column, the row colouring gets mixed up.

Environment: Python 3.10.0 Windows 21H1