//
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// RxPickerViewAdapter.swift
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// RxDataSources
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//
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// Created by Sergey Shulga on 04/07/2017.
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// Copyright © 2017 kzaher. All rights reserved.
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//
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#if os(iOS)
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import Foundation
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import UIKit
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#if !RX_NO_MODULE
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import RxSwift
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import RxCocoa
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#endif
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/// A reactive UIPickerView adapter which uses `func pickerView(UIPickerView, titleForRow: Int, forComponent: Int)` to display the content
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/**
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Example:
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let adapter = RxPickerViewStringAdapter<[T]>(...)
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items
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.bind(to: firstPickerView.rx.items(adapter: adapter))
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.disposed(by: disposeBag)
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*/
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open class RxPickerViewStringAdapter<Components>: RxPickerViewDataSource<Components>, UIPickerViewDelegate {
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/**
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- parameter dataSource
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- parameter pickerView
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- parameter components
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- parameter row
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- parameter component
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*/
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public typealias TitleForRow = (
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_ dataSource: RxPickerViewStringAdapter<Components>,
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_ pickerView: UIPickerView,
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_ components: Components,
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_ row: Int,
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_ component: Int
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) -> String?
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private let titleForRow: TitleForRow
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/**
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- parameter components: Initial content value.
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- parameter numberOfComponents: Implementation of corresponding delegate method.
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- parameter numberOfRowsInComponent: Implementation of corresponding delegate method.
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- parameter titleForRow: Implementation of corresponding adapter method that converts component to `String`.
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*/
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public init(components: Components,
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numberOfComponents: @escaping NumberOfComponents,
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numberOfRowsInComponent: @escaping NumberOfRowsInComponent,
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titleForRow: @escaping TitleForRow) {
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self.titleForRow = titleForRow
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super.init(components: components,
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numberOfComponents: numberOfComponents,
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numberOfRowsInComponent: numberOfRowsInComponent)
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}
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open func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
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return titleForRow(self, pickerView, components, row, component)
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}
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}
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/// A reactive UIPickerView adapter which uses `func pickerView(UIPickerView, viewForRow: Int, forComponent: Int, reusing: UIView?)` to display the content
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/**
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Example:
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let adapter = RxPickerViewAttributedStringAdapter<[T]>(...)
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items
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.bind(to: firstPickerView.rx.items(adapter: adapter))
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.disposed(by: disposeBag)
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*/
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open class RxPickerViewAttributedStringAdapter<Components>: RxPickerViewDataSource<Components>, UIPickerViewDelegate {
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/**
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- parameter dataSource
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- parameter pickerView
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- parameter components
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- parameter row
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- parameter component
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*/
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public typealias AttributedTitleForRow = (
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_ dataSource: RxPickerViewAttributedStringAdapter<Components>,
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_ pickerView: UIPickerView,
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_ components: Components,
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_ row: Int,
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_ component: Int
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) -> NSAttributedString?
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private let attributedTitleForRow: AttributedTitleForRow
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/**
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- parameter components: Initial content value.
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- parameter numberOfComponents: Implementation of corresponding delegate method.
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- parameter numberOfRowsInComponent: Implementation of corresponding delegate method.
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- parameter attributedTitleForRow: Implementation of corresponding adapter method that converts component to `NSAttributedString`.
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*/
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public init(components: Components,
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numberOfComponents: @escaping NumberOfComponents,
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numberOfRowsInComponent: @escaping NumberOfRowsInComponent,
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attributedTitleForRow: @escaping AttributedTitleForRow) {
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self.attributedTitleForRow = attributedTitleForRow
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super.init(components: components,
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numberOfComponents: numberOfComponents,
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numberOfRowsInComponent: numberOfRowsInComponent)
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}
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open func pickerView(_ pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? {
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return attributedTitleForRow(self, pickerView, components, row, component)
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}
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}
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/// A reactive UIPickerView adapter which uses `func pickerView(pickerView:, viewForRow row:, forComponent component:)` to display the content
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/**
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Example:
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let adapter = RxPickerViewViewAdapter<[T]>(...)
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items
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.bind(to: firstPickerView.rx.items(adapter: adapter))
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.disposed(by: disposeBag)
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*/
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open class RxPickerViewViewAdapter<Components>: RxPickerViewDataSource<Components>, UIPickerViewDelegate {
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/**
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- parameter dataSource
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- parameter pickerView
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- parameter components
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- parameter row
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- parameter component
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- parameter view
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*/
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public typealias ViewForRow = (
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_ dataSource: RxPickerViewViewAdapter<Components>,
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_ pickerView: UIPickerView,
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_ components: Components,
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_ row: Int,
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_ component: Int,
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_ view: UIView?
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) -> UIView
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private let viewForRow: ViewForRow
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/**
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- parameter components: Initial content value.
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- parameter numberOfComponents: Implementation of corresponding delegate method.
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- parameter numberOfRowsInComponent: Implementation of corresponding delegate method.
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- parameter attributedTitleForRow: Implementation of corresponding adapter method that converts component to `UIView`.
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*/
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public init(components: Components,
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numberOfComponents: @escaping NumberOfComponents,
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numberOfRowsInComponent: @escaping NumberOfRowsInComponent,
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viewForRow: @escaping ViewForRow) {
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self.viewForRow = viewForRow
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super.init(components: components,
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numberOfComponents: numberOfComponents,
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numberOfRowsInComponent: numberOfRowsInComponent)
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}
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open func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
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return viewForRow(self, pickerView, components, row, component, view)
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}
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}
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/// A reactive UIPickerView data source
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open class RxPickerViewDataSource<Components>: NSObject, UIPickerViewDataSource {
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/**
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- parameter dataSource
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- parameter pickerView
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- parameter components
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*/
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public typealias NumberOfComponents = (
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_ dataSource: RxPickerViewDataSource,
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_ pickerView: UIPickerView,
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_ components: Components) -> Int
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/**
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- parameter dataSource
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- parameter pickerView
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- parameter components
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- parameter component
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*/
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public typealias NumberOfRowsInComponent = (
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_ dataSource: RxPickerViewDataSource,
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_ pickerView: UIPickerView,
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_ components: Components,
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_ component: Int
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) -> Int
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fileprivate var components: Components
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/**
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- parameter components: Initial content value.
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- parameter numberOfComponents: Implementation of corresponding delegate method.
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- parameter numberOfRowsInComponent: Implementation of corresponding delegate method.
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*/
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init(components: Components,
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numberOfComponents: @escaping NumberOfComponents,
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numberOfRowsInComponent: @escaping NumberOfRowsInComponent) {
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self.components = components
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self.numberOfComponents = numberOfComponents
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self.numberOfRowsInComponent = numberOfRowsInComponent
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super.init()
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}
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private let numberOfComponents: NumberOfComponents
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private let numberOfRowsInComponent: NumberOfRowsInComponent
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// MARK: UIPickerViewDataSource
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public func numberOfComponents(in pickerView: UIPickerView) -> Int {
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return numberOfComponents(self, pickerView, components)
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}
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public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
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return numberOfRowsInComponent(self, pickerView, components, component)
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}
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}
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extension RxPickerViewDataSource: RxPickerViewDataSourceType {
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public func pickerView(_ pickerView: UIPickerView, observedEvent: Event<Components>) {
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Binder(self) { dataSource, components in
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dataSource.components = components
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pickerView.reloadAllComponents()
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}.on(observedEvent)
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}
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}
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#endif
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