ContentItem of ListView

alemio

Thank you but my problem is different, because I have some logic in the delegate.
See this example

Text {
id: itexItem
font.pixelSize: 40
text: model.text === "10"? "Test" : model.text
}

So I can't use model, but I should ListView the text of delegate

Shrinidhi Upadhyaya

Hi @alemio , your code is working fine for me

 ListView{
         id:listView
         width: 100
         height: 100
         model: listModel
         delegate: Rectangle {
             id: delegateItem
             width: parent.width; height: 100
 
             Text {
                 id: itexItem
                 font.pixelSize: 40
                 text: model.text === "10"? "Test" : model.text
             }
         }
     }

Sample Output:-

VRonin

@alemio said in ContentItem of ListView:

because I have some logic in the delegate.

The delegate is just for painting it should not contain data logic. You should move that logic in a proxy model

Aikens6

This post is deleted!

alemio

Thank you, but so the answer is that I can't use the contentItem to see all items in the ListView, right?

are all items added/deleteded dinamically to the contentItem?

IntruderExcluder

@alemio said in ContentItem of ListView:

are all items added/deleteded dinamically to the contentItem?

Yes. ListView destroys items out of viewport.

alemio

Ok, I'll explain my problem better, maybe it will be easier.
I would like to export a ListView to Excel. In my real project I have a a model and a proxymodel but it has more fields than the ListView and the order is different. If the way is use proxymodel, how can I do that?

VRonin

@alemio said in ContentItem of ListView:

In my real project I have a a model and a proxymodel

@alemio said in ContentItem of ListView:

how can I do that?

As mentioned, you should move the logic you currently have in the delegate to the proxy model and use that to save.
Is your model a QML model or a C++(QAbstractItemModel) one?

alemio

The model is a c++ model QAbstractItemModel. I have a unique model for each table in the database (autogenerated from orm). I have also a proxymodel for these c++ model

alemio

My proxy model is derived from SortFilterProxyModel

@VRonin Tell me please if I have a colored row or different font, how can I export that in excel?

VRonin

You can use this library to create the excel file with custom formatting.

alemio

@VRonin I've already taken this library.
I just need to understand how put some logic in proxy model as you told me.
I saw DelegateModel component, but I don't find example how can I extract data in c++ (I think at the end it is the same problem like listview delegate)

VRonin

@alemio said in ContentItem of ListView:

I just need to understand how put some logic in proxy model

It's not really clear what exactly you are doing but I suspect you'd want to override the data() method of the proxy to convert some value in the base model to a different value in the proxy

but I don't find example how can I extract data in c++

Check out JsonModelSerialiserPrivate::toJsonObject of this file for an example. this extracts the data and saves it in a JSON object, you basically have to do the same but save it in an excel file