Contents

ObjectProxyModel QML Type

Proxy model using QML delegate to transform source model. More...

Import Statement: import QtModelsToolkit .

Properties

Detailed Description

This proxy creates object from provided delegate component for every row. The delegate's instance can access data from source model and expose properties as new roles.

ObjectProxyModel may transform not only plain types but also complex types as submodels:

ObjectProxyModel {
    sourceModel: tokensModel

    delegate: SortFilterProxyModel {
        id: delegateRoot

        readonly property int balancesCount: model.balances.ModelCount.count
        readonly property int sum: aggregator.value
        readonly property SortFilterProxyModel balances: this

        sourceModel: model.balances

        filters: ExpressionFilter {
            expression: balance >= thresholdSlider.value
        }

        readonly property SumAggregator aggregator: SumAggregator {
            id: aggregator

            model: delegateRoot
            roleName: "balance"
        }
    }

    exposedRoles: ["balances", "balancesCount", "sum"]
    expectedRoles: ["balances"]
}

In this example, submodel "balances" from source model is filtered to keep only values higher or equal to a given threshold. Then it's exposed via "balances" property, overriding original role. Additionally new roles are exposed:

Property Documentation

delegate : any

This property holds the component created for every row of the source model in order to transform the source data in-place, overriding existing roles, or/and by exposing new roles.


expectedRoles : list<string>

This property holds the names of roles that are intended to be available within the delegate's instances.


exposedRoles : list<string>

This property holds the names of roles that are exposed from the model. Those names must match names of properties defined in a delegate, as those properties are data source of those roles.