Looking for info on QML ListView engines/delegates from Python script

bundito

I did this all the time when I was an active KDE contributor (now semi-retired), but they have a bunch of custom classes to make some of these things easier.

I can't find anything about a data engine in Python connecting to a PySide2 list. Can anyone point me in the right direction? I'm much happier coding my interfaces in QML than regular widget code.

Thanks.

SGaist

Hi,

Can you give more details about what you mean by data engine ?

bundito

@SGaist said in Looking for info on QML ListView engines/delegates from Python script:

Hi,

Can you give more details about what you mean by data engine ?

Essentially bit of code that iterates or creates a list of items and forwards them to the QML layout. Typically, you'd format them in QML as a ComboBox or a stack of Rectangles containing your items (probably with checkboxes). As the QML changed - box checked or ComboBox item selected - the QML would signal that back to the underlying script (i.e. main.py) to effect the change.

bundito

Here are the KDE API pages if they help you understand what I'm talking about. It's a sort of model/view concept.

https://api.kde.org/frameworks/plasma-framework/html/classPlasma_1_1DataSource.html

https://api.kde.org/frameworks/plasma-framework/html/classPlasma_1_1DataModel.html

bundito

@Denni-0 said in Looking for info on QML ListView engines/delegates from Python script:

Are you talking about the Q-Model series of classes? Aka like a Model View of a data table

Ah-hah. Yes. I was so accustomed to the helper classes KDE used that I couldn't recall the proper Qt name. So, thanks for jogging my failing memory.

Anyway... does PySide2/Qt4Py have support for these handy techniques?

bundito

@Denni-0 said in Looking for info on QML ListView engines/delegates from Python script:

Yeah Qt5 and its children PySide2 and PyQt5 all support the Model View concept if you go here https://doc.qt.io/qt-5/classes.html and do a search either on QAbstract or just Model you can see all of them

Thanks, @Denni-0. I appreciate your help (this is twice now), even if you're making me realize just how rusty I actually am.

I'll try not to bug you guys with every blank spot in my brain...

Thanks.

bundito

@Denni-0 said in Looking for info on QML ListView engines/delegates from Python script:

still yes if you could perhaps try to find the answer first ;) that might help you more than us feeding you fish every now and again

I couldn't agree more. I've been on enough forums in my years to know that rule. My problem here was that I couldn't recall the proper Qt name for this mechanism. And I think most people would agree that the entirety of the Qt documentation is quite a huge amount of information, and it's easy to get into a loop between related pages. :-)

Now I just have to solve a Python part of my project and I'll be making headway again.