status-desktop/ui/app/AppLayouts/stores/CloneModel.qml

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import QtQuick 2.15
/// Helper item to clone a model and alter its data without affecting the original model
/// \beware this is not a proxy model. It clones the initial state
/// and every time the instance changes and doesn't adapt when the data
/// in the source model \c allNetworksModel changes
/// \beware use it with small models and in temporary views (e.g. popups)
/// \note requires `rowData` to be implemented in the model
/// \note tried to use SortFilterProxyModel with but it complicates implementation too much
ListModel {
id: root
required property var sourceModel
/// Roles to clone
required property var roles
/// Roles to override or add of the form { role: "roleName", transform: function(modelData) { return newValue } }
property var rolesOverride: []
Component.onCompleted: cloneModel(sourceModel)
onSourceModelChanged: cloneModel(sourceModel)
function rowData(index, roleName) {
return get(index)[roleName]
}
function findIndexForRole(roleName, value) {
for (let i = 0; i < count; i++) {
if(get(i)[roleName] === value) {
return i
}
}
return -1
}
function cloneModel(model) {
clear()
if (!model) {
console.warn("Missing valid data model to clone. The CloneModel is useless")
return
}
for (let i = 0; i < model.count; i++) {
const clonedItem = new Object()
for (var propName of roles) {
clonedItem[propName] = model.rowData(i, propName)
}
for (var newProp of rolesOverride) {
clonedItem[newProp.role] = newProp.transform(clonedItem)
}
append(clonedItem)
}
}
}