QListWidget row size with a custom QListWidgetItem

canellas

The Item class
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The screen on my cel, with sizePolicy set to Fixed in both dimensions:
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And with setSizeHint(QSize(0, 150));

kshegunov

Okay, wait a bit. So you have a compound widget, does that widget have a layout? If it does you shouldn't need to do anything (even set the hint).

canellas

@kshegunov Yes, The first TextLabel and the text box by its side are grouped in a horizontal layout, as the Text Label and the text box below, and the whole Item class, sub class of QWidget, has a vertical layout.

I wonder if the QListWidgetItem, or the list object should, somehow, have a layout defined.

kshegunov

Hm that's odd. If you have a vertical layout for the widget, I'd set the policy to expanding both directions. Aside from that it might be some peculiarity of the view ... but I haven't encountered it by now.

I wonder if the QListWidgetItem, or the list object should, somehow, have a layout defined.

It has a special way of laying out the items (implemented for the view itself).

canellas

@kshegunov I set the sizePolicy to Expanding in horizontal and vertical dimensions, but the result was the same. I tried to remove the setSizeHint(QSize(0, 150));,and also the setSizeAdjustPolicy(QListWidget::AdjustToContents);, but with the same result.

kshegunov

It's possible it may be a bug too. Can you prepare a minimal example that reproduces the behaviour? Btw, do you experience this only on the mobile device, when the screen is small?

canellas

@kshegunov Only in the mobile. When I run on a 14" notebook display, it works as expected, i.e., the row height and width expand and reduce according to the size of the window.

I have the example ready. Where should I send it to?

In time, thanks a lot for your time!

kshegunov

Upload it where it's convenient. I'd try on my machine but I don't have any device on hand, so it might be a very limited test. For now my advice is to wait a bit so our other users can see and possibly offer insight, but you may need to post it (the example and description) as a bugreport. Don't hold your breath of it being fixed though, the widgets module isn't priority ...

canellas

@kshegunov I uploaded the project to https://www.dropbox.com/s/tx88huu23d5cfcm/untitled6.tar.gz?dl=0. It is a tar.gz file, if you do not mind.

Well, if it is a bug, that means big trouble to me, as I am using something similar in a customer application.

Again, thanks for your help and time!

kshegunov

I took a peek at your code and I have artifacts when resizing the widget. But it's my bad. You can't do this the way you're trying to. Here:

This function should only be used to display static content in the place of a list widget item. If you want to display custom dynamic content or implement a custom editor widget, use QListView and subclass QItemDelegate instead.

So what you need to do is to rework your code to use a list view with a delegate.

canellas

@kshegunov I understand... well, I'll try, once more, to understand views, models and delegates, and how Qt implement them. 8)

The examples that come with QtCreator do not, as far as I could see, show how to insert in a Q*View a custom class object, and searching the web, I could not find an example either.

Do you know any link that shows how to implement it? I would not mind to take a few days to do it from scratch on my own, but I do not have a lot of time to fix the app.

Anyway, thanks a lot!!!