75 lines
2.5 KiB
Swift
75 lines
2.5 KiB
Swift
//
|
|
// ViewStack.swift
|
|
// Adwaita
|
|
//
|
|
// Created by david-swift on 30.12.23.
|
|
//
|
|
|
|
import CAdw
|
|
|
|
/// A widget holding multiple children but only displaying one.
|
|
public struct ViewStack: Widget {
|
|
|
|
/// The stack's active content.
|
|
var content: Body
|
|
/// The stack's active identifier.
|
|
var id: CustomStringConvertible
|
|
|
|
/// Initialize the stack.
|
|
/// - Parameters:
|
|
/// - id: The identifier of the current view.
|
|
/// - view: The current view.
|
|
public init<Identifier>(
|
|
id: Identifier,
|
|
@ViewBuilder view: @escaping (Identifier) -> Body
|
|
) where Identifier: CustomStringConvertible {
|
|
content = view(id)
|
|
self.id = id
|
|
}
|
|
|
|
/// Initialize the stack.
|
|
/// - Parameters:
|
|
/// - element: The current identifiable element.
|
|
/// - view: The current view.
|
|
public init<Element>(
|
|
element: Element,
|
|
@ViewBuilder view: @escaping (Element) -> Body
|
|
) where Element: Identifiable, Element.ID: CustomStringConvertible {
|
|
content = view(element)
|
|
self.id = element.id
|
|
}
|
|
|
|
/// Get a stack's view storage.
|
|
/// - Parameter modifiers: Modify views before being updated.
|
|
/// - Returns: The stack's view storage.
|
|
public func container(modifiers: [(View) -> View]) -> ViewStorage {
|
|
let stack = gtk_stack_new()
|
|
let storage = ViewStorage(.init(stack))
|
|
update(storage, modifiers: modifiers, updateProperties: true)
|
|
return storage
|
|
}
|
|
|
|
/// Update a stack's view storage.
|
|
/// - Parameters:
|
|
/// - storage: The view storage.
|
|
/// - modifiers: Modify views before being updated.
|
|
/// - updateProperties: Whether to update properties.
|
|
public func update(_ storage: ViewStorage, modifiers: [(View) -> View], updateProperties: Bool) {
|
|
let widget = content.widget(modifiers: modifiers)
|
|
if let view = storage.content[id.description]?.first {
|
|
widget.updateStorage(view, modifiers: modifiers, updateProperties: updateProperties)
|
|
} else {
|
|
let view = widget.storage(modifiers: modifiers)
|
|
gtk_stack_add_named(storage.pointer, view.pointer?.cast(), id.description)
|
|
storage.content[id.description] = [view]
|
|
}
|
|
if let visibleView = storage.content[id.description]?.first {
|
|
if let transition = visibleView.fields[.transition] as? Transition {
|
|
gtk_stack_set_transition_type(storage.pointer, transition.cTransition)
|
|
}
|
|
gtk_stack_set_visible_child_name(storage.pointer, id.description)
|
|
}
|
|
}
|
|
|
|
}
|