Unsolved Adding items to JS list which is used as a model
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I have a ListView and its model is a JavaScript list. For example if I declare it as
property var options: [{text: "ttt"}]and use it in delegate as modelData.text there is no problem in first initialization.But when i want to add an item to that list using a button etc. it doesnt do anything. I call options.push(item) but neither it gives an error nor updates view.
I may use QML item models but this is easier since i get this input from a JSON source.
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Hi,
this can help for the data persistence : https://stackoverflow.com/questions/48730166/how-to-save-and-restore-the-content-of-a-listmodelyou can parse your json file first, then you create a ListModel with the data (methode in the first link)
then you add data using append() http://doc.qt.io/qt-5/qml-qtqml-models-listmodel.html#append-method
and save on exit
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@LeLev I know how to do it like in link you gave. He uses for loop to add them to a ListModel:
for (var i = 0; i < datamodel.length; ++i) dataModel.append(datamodel[i])But I can use a simple JavaScript list as a model and i want to push items to that directly. But model doesnt update when use list.push().
If i cannot find a solution i have to use that ListModel way ofcourse.
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@maydin said in Adding items to JS list which is used as a model:
property var options:
Declare as
property var options:["ttt"]To add items use
options.push("Some Text") -
@Yaswanth Read my first post. I did same but it doesnt update view.
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@maydin Pure Javascript array could not be models easily, instead, use
ListModel, or use C++QStringListor other C++ data structure. -
@maydin I checked it again, Lisview is not updating after adding elements. But if you reassign the model to the listview, it gets updated.
One more way is using ListModel in qml. -
If you dont need to change model, then using JS models is easiest solution. But if you can change model then you have to use ListModel or C++ Model.
I think we reached the final conclusion. But not sure should I mark as solved.
