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将域类包装到ItemViewModel

tornadofx kotlin

skiey · 技术社区 · 8 年前

我有一个域类

class UserItem(var simpleItem: Item, var id: String, var status: String, var price: Int) {
    var upperLimit: Int = 0
    var lowerLimit: Int = 0
    /* methods here */
}

以及存储这些对象的类

class Trades {
    val saleableItems: ArrayList<UserItem> = ArrayList()
    val soldAwaitingItems: ArrayList<UserItem> = ArrayList()

    /* methods */
}

saleableItems 和 soldAwaitingItems 从内部更新 Trades

我想展示使用 TableView 这样我就可以绑定数据和视图,而不用将属性转换为TornadFX属性,所以我包装了 UserItem 到 ItemViewModel

class UserItemModel(uItem: UserItem) : ItemViewModel<UserItem>() {
    val simpleItem = bind { item?.observable(UserItem::simpleItem) }
    val id = bind { item?.observable(UserItem::id) }
    val status = bind { item?.observable(UserItem::status) }
    val price = bind { item?.observable(UserItem::price) }
    val upperLimit = bind { item?.observable(UserItem::upperLimit) }
    val lowerLimit = bind { item?.observable(UserItem::lowerLimit) }

    init {
        item = uItem
    }
}

有什么办法包装吗 ItemViewModel<Trades> 这样我就有了

class TradesModel : ItemViewModel<Trades>() {
    val saleableItems: ObservableList<UserItemModel>
    val soldAwaitingItems: ObservableList<UserItemModel>
}

View

class TradesView : View("My View") {
val tradesModel: TradesModel by inject()

    tableview(tradesModel.saleableItems) {
        column("Name", UserItemModel::simpleItem)
        column("Price", UserItemModel::price)
        column("Lower limit", UserItemModel::lowerLimit)
        column("Upper limit", UserItemModel::upperLimit)
    }
}

1 回复 | 直到 6 年前

Trein 8 年前

你试过这样的东西吗?

class UserItemModel(uItem: UserItem) : ItemViewModel<UserItem>() {
    // Same way you defined previously.
}

class TradesViewModel {
    val saleableItems: SimpleListProperty<UserItemModel>(FXCollections.observableArrayList())
    val soldAwaitingItems: SimpleListProperty<UserItemModel>(FXCollections.observableArrayList())
}

class TradesView : View("My View") {
    val tradesModel: TradesViewModel by inject()

    init {
        with(root) {
            tableview(tradesModel.saleableItems) {
                column("Name", UserItemModel::simpleItem)
                column("Price", UserItemModel::price)
                column("Lower limit", UserItemModel::lowerLimit)
                column("Upper limit", UserItemModel::upperLimit)
            }   
        }
    }
}

UserItemModel 作为一个简单的数据类-无需扩展 ItemViewModel