Я работаю над приложением, которое требует TreeView. Я могу создать древовидное представление, но сталкиваюсь с проблемой динамического обновления древовидного представления на основе изменения базового набора данных.
Классы:
data class Channels(
val channel: Channel? = null
)
data class Channel(
val id: String? = null,
val name: String? = null,
val parentChannelId: String? = null
)
Список данных:
var channels = observableListOf(
Channels(channel = Channel(id = "pc1", name = "P Channel 1")),
Channels(channel = Channel(id = "c11", name = "Child 1-1", parentChannelId = "pc1")),
Channels(channel = Channel(id = "c12", name = "Child 1-2", parentChannelId = "pc1")),
Channels(channel = Channel(id = "c121", name = "Child 1-2-1", parentChannelId = "c12")),
Channels(channel = Channel(id = "c111", name = "Child 1-1-1", parentChannelId = "c11")),
Channels(
channel = Channel(
id = "c1111",
name = "Child 1-1-1-1",
parentChannelId = "c111"
)
),
Channels(channel = Channel(id = "pc2", name = "P Channel 2")),
Channels(channel = Channel(id = "pc3", name = "P Channel 3")),
Channels(channel = Channel(id = "c31", name = "Child 3-1", parentChannelId = "pc3"))
)
Treeview:
treeview<Channels> {
isShowRoot = false
root = TreeItem()
cellFormat { text = it.channel?.name }
populate { parent ->
if (parent == root) channels.filter {
it.channel?.parentChannelId == null
} else channels.filter {
it.channel?.parentChannelId == parent.value?.channel?.id
}
}
}
Теперь, когда я изменяю список channels
, treeview не обновляется. Я застрял на этом с 3-4 дня. Пожалуйста, помогите.