how to refresh the appearance when the listmodel data has changed in a stackview ?

[hasson]

how to refresh the appearance when the listmodel data has changed in a stackview ? the page has pushed to a stackview, and the listmodel data is from c++ ,and how about refreshing a upper page ?
thanks

[jsulm]

@hasson That should be automatically the case when dataChanged() signal was emitted after changing data.

[hasson]

but what i saw is that the page didn't changed until re-push it

[J.Hilk]

@hasson
by "re-pushing" you recreate your (List?)View, meaning it itself - without reacting to the signal - fetches the data from the c++ model.

The fact that it only does this when recreated means there's either something wrong in the model binding (possibly broken) or your c++ model does not in fact emit the modelChanged signal.

Impossible to tell, until you share some code with us

[hasson]

thanks, my c++ model does not in fact emit the modelChanged signal

[sharath]

Hi @hasson,

you can try this.

first emit one signal from your c++ class, lets say emit listmodelChanged() each time whenever your listmodel changes and in qml follow the code.

StackView
{
id:stack
}
Connection
{
target:yourCppObject
     onListmodelChanged:
     {
         stack.pop(null) 
     }
}

[GrecKo]

@hasson said in how to refresh the appearance when the listmodel data has changed in a stackview ?:

the listmodel data is from c++

What do you mean by that?
What is the type of your model and how do you update it in c++?

[hasson]

@sharath thanks, but i don't want to pop any item when data changed

[hasson]

Hi@grecko the model is inherit from QAbstractListModel, and i update it by writing data direct

[GrecKo]

If you call the dataChanged signal and the [begin|end][Insert|Remove]Rows functions appropriately, it should work out of the box.

[hasson]

@grecko said in how to refresh the appearance when the listmodel data has changed in a stackview ?:

it should work out of the box.

because of not using dataChanged signal,it doesn't work,,now it's working,
thank you!