Add support for pickers

Sources/Core/View/Picker.swift

@@ -0,0 +1,59 @@
+//
+//  Picker.swift
+//  MacBackend
+//
+//  Created by david-swift on 08.12.2024.
+//
+
+import SwiftUI
+
+/// A picker view.
+public struct Picker<Item>: SwiftUIWidget where Item: Hashable, Item: CustomStringConvertible {
+
+    /// The selected item.
+    @Meta.Binding var selection: Item
+    /// The picker's label.
+    var label: String
+    /// The picker's items.
+    var items: [Item]
+    /// Whether to use the segmented picker stlye.
+    var segmented = false
+
+    /// Initialize the picker.
+    /// - Parameters:
+    ///   - label: The picker's label.
+    ///   - items: The picker's items.
+    ///   - selection: The selected item.
+    public init(_ label: String, items: [Item], selection: Meta.Binding<Item>) {
+        self._selection = selection
+        self.label = label
+        self.items = items
+    }
+
+    /// Get the SwiftUI view.
+    /// - Parameter properties: The widget data.
+    /// - Returns: The SwiftUI view.
+    public static func view(properties: Picker<Item>) -> some SwiftUI.View {
+        let picker = SwiftUI.Picker(properties.label, selection: properties._selection.swiftUI) {
+            ForEach(properties.items, id: \.hashValue) { item in
+                SwiftUI.Text(item.description)
+                    .tag(item.description)
+            }
+        }
+        if properties.segmented {
+            picker
+                .pickerStyle(.segmented)
+        } else {
+            picker
+                .pickerStyle(.automatic)
+        }
+    }
+
+    /// Make the picker segmented.
+    /// - Parameter segmented: Whether the picker is segmented.
+    /// - Returns: The picker.
+    public func segmented(_ segmented: Bool = true) -> Self {
+        modify { $0.segmented = segmented }
+    }
+
+}

Sources/Core/View/ToolbarView.swift

@@ -14,6 +14,8 @@ public struct ToolbarView: SwiftUIWidget {
     var child: Meta.AnyView
     /// The toolbar views.
     var toolbarViews: Body
+    /// The toolbar type.
+    var toolbarType: ToolbarType = .end
 
     /// The wrapped views.
     public var wrappedViews: [String: Meta.AnyView] {
@@ -25,22 +27,61 @@ public struct ToolbarView: SwiftUIWidget {
     /// Initialize the padding view.
     /// - Parameters:
     ///   - child: The wrapped view.
+    ///   - type: The position.
     ///   - toolbarViews: The views in the toolbar.
-    public init(child: Meta.AnyView, @Meta.ViewBuilder toolbarViews: () -> Body) {
+    public init(child: Meta.AnyView, type: ToolbarType, @Meta.ViewBuilder toolbarViews: () -> Body) {
         self.child = child
         self.toolbarViews = toolbarViews()
+        self.toolbarType = type
+    }
+
+    /// The type of toolbar.
+    public enum ToolbarType {
+
+        /// A leading toolbar.
+        case start
+        /// A trailing toolbar.
+        case end
+        /// A centered toolbar.
+        case center
+
     }
 
     /// Get the SwiftUI view.
     /// - Parameter properties: The widget data.
     /// - Returns: The SwiftUI view.
     public static func view(properties: Self) -> some SwiftUI.View {
+        switch properties.toolbarType {
+        case .end:
             MacBackendView(.mainContent)
                 .toolbar {
                     ForEach(properties.toolbarViews.indices, id: \.self) { index in
                         MacBackendView("\(index)")
                     }
                 }
+        case .start:
+            MacBackendView(.mainContent)
+                .toolbar {
+                    ToolbarItem(placement: .navigation) {
+                        SwiftUI.HStack {
+                            ForEach(properties.toolbarViews.indices, id: \.self) { index in
+                                MacBackendView("\(index)")
+                            }
+                        }
+                    }
+                }
+        case .center:
+            MacBackendView(.mainContent)
+                .toolbar {
+                    ToolbarItem(placement: .principal) {
+                        SwiftUI.HStack {
+                            ForEach(properties.toolbarViews.indices, id: \.self) { index in
+                                MacBackendView("\(index)")
+                            }
+                        }
+                    }
+                }
+        }
     }
 
 }

Sources/Demo/Demo.swift

@@ -25,8 +25,17 @@ struct Demo: App {
     @State private var selectedElement: String?
     @State private var alert = false
     @State private var menuPresented = false
+    @State private var selection = "Hello"
 
     var scene: Scene {
+        Window(id: "secondary") { _ in
+            Text(selection)
+                .centeredToolbar {
+                    Picker("Test", items: ["Hello", "World"], selection: $selection)
+                        .segmented()
+                }
+        }
+        .frame(width: .constant(800), height: .constant(600))
         Window("Main", id: "main") { _ in
             NavigationSplitView {
                 List(elements, selection: $selectedElement) { element in

Sources/MacBackend/AnyView.swift

@@ -39,11 +39,25 @@ extension AnyView {
         MenuWrapper(content: { self }, isPresented: isPresented, menu: menu)
     }
 
-    /// Set the toolbar.
+    /// Add toolbar items to the end.
     /// - Parameter content: The toolbar's content.
     /// - Returns: The view.
     public func toolbar(@ViewBuilder content: () -> Body) -> AnyView {
-        ToolbarView(child: self, toolbarViews: content)
+        ToolbarView(child: self, type: .end, toolbarViews: content)
+    }
+
+    /// Add toolbar items to the start.
+    /// - Parameter content: The toolbar's content.
+    /// - Returns: The view.
+    public func leadingToolbar(@ViewBuilder content: () -> Body) -> AnyView {
+        ToolbarView(child: self, type: .start, toolbarViews: content)
+    }
+
+    /// Add centered toolbar items.
+    /// - Parameter content: The toolbar's content.
+    /// - Returns: The view.
+    public func centeredToolbar(@ViewBuilder content: () -> Body) -> AnyView {
+        ToolbarView(child: self, type: .center, toolbarViews: content)
     }
 
 }