Hi, please can you post a piece of your code ? ListViews are objects that don’t need to implement the flickable mechanism because they are already flickable objects by default.

I understand that they are flickable objects. The problem is that if items have different height, the listView’s contentHeight is counted not correct;
Unfortunaly i am not able to post my code here, because it is to much of it, but i’ll try to post an example.
ListDelegate.qml

The sometext value may be multiline, so each delegate may have different height

Mmmh… I see. The problem I think maybe in the text. As a matter of fact I have expereienced that the height of your edit example is not always correct if the text is higher. You should check the height of the text.

But, just to be clear, I understand that you don’t need to show your code, but this example is so simple. It is difficult to disucss about something that is not possible to see.

Thanks for your help. I think i found where my bug is. TextEdit height depends on paintedHeight value, and when list is scrolling it is “jumping” from one value to another. Is it because of that paintedHeight depends on visibility of the text on the screen?

Partially true. The real text height depends on the font size and the number of characters. Then the program shows text with word wrap (I suppose yes in this case). This means that you can’t know before how much lines your text is really height. Thus you should manage the height of every list element based on the painted height. Eventually you can decide in your model to put a control like elide the test that exceeds the previous decided height or if the painted height exceeds the height of your list model you should remove lines or words from your sentence before it is shown.

Thanks again for help.

Even if i set all delegates height to 20, and to one of them to 50, contentHeight value counts not correctly when scrolling the listView

Thank you for this news. I had not experienced this condition but I am developing an application that can happen. So I manage it a workaround before.

I was thinking to set ContentHeight manually, by counting every item’s text’s length, and number of lines of text, but! ListView just ignores my value, and uses it’s own. :)
Is it ok?

I think yes. The reason will be that you try setting the value of the element that is built automatically depending on the ListModel, where you define the aspect of the elements that formerly are part of the generic abstract representation of any element of the list.

ListView just fill the model based on the ListElements (or any other element i.e. the XmlList). I think that you should try to set the sizes in the ListModel. Thus when you define the model you don’t know yet what will be the size of that particular instance of the model when the ListView will fill it with the ListData. If in the model you create an area that changes depending on every element content I think that everything works fine.

A short advice in your case: if you set a text in a rectangle the object that you manage as the size reference is the rectangle, despite the text size. To avoid this problem you should do something like the following:

1. Create a rectangle set with the initial width and height you want.
2. Set the rectangle opacity to 0 if it should be hidden: you only need a fake object
3. Create a text object and bind the rectangle height to the full text height: this means that depending by how much text you have the rectangle will be always height to contain it.
4. Align the text object on top margin of the rectangle (one over the other)

Try it and let me know if it works. I you have some doubt I will try to create this kind of coupled object.

See the following example. Sorry but I get it from a more complex piece of code so I think it can’t work. BTW you can get the idea applying it in your code without difficult.

Hope it can help you.

Or it is me who make it wrong, or i don’t know :)
As for rectangles and text inside of it, in my current code text is in rectangle already, and my delegate’s height depends on text height and if Loader component is loaded, it’s height added to delegate’s height, and there is also separator line to separate two types of items in the view; I thought that something in my current code is making contentHeight value “jumping”, so i just created small example project and test everything using it;
I also noticed that contentHeight value changed when item with higher height scrolls away or returns to screen; So i think that contentHeight depends on items visibility or smth.
p.s. tried to set item’s height from model – didn’t help
Here is example that i am using
ListDelegate.qml

ListModel.qml

main.qml

Project from which you posted part of code, as i understand there are no problems with contentHeight?
Or they are just invisible? )

This is the solution that I have adopted to solve the problem of content height.

Two strange things in your example: ListDelegate.qml is the ListItem ? It seems you have misunderstood the role of the three elements Item, Model and Delegate.

It’s probably when i say item i mean the item in the list, and when i say delegate, i mean the delegate. I think i do understand the role of three elements, and just build my sentences wrong.
Could you please explain what you find strange in that example?
ListDelegate.qml it is a delegate;