TDKCandidates // Make CandidatePool into an ObservableObject.

Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidatePool.swift

@@ -142,6 +142,14 @@ public extension CandidatePool {
     case vertical
   }
 
+  func update() {
+    if #available(macOS 10.15, *) {
+      DispatchQueue.main.async {
+        self.objectWillChange.send()
+      }
+    }
+  }
+
   /// 往指定的方向翻頁。
   /// - Parameter isBackward: 是否逆向翻頁。
   /// - Returns: 操作是否順利。
@@ -418,3 +426,8 @@ private extension CandidatePool {
     }
   }
 }
+
+// MARK: - Turn CandidatePool into an ObservableObject.
+
+@available(macOS 10.15, *)
+extension CandidatePool: ObservableObject {}

Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift

@@ -117,6 +117,7 @@ public class CtlCandidateTDK: CtlCandidate, NSWindowDelegate {
           Self.currentView = theViewCocoa
           break viewCheck
         }
+        Self.thePool.update()
         Self.currentView = NSHostingView(rootView: theView)
       } else {
         Self.currentView = theViewCocoa

Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateTDK_SwiftUI.swift

@@ -17,7 +17,7 @@ import SwiftUIBackports
 public struct VwrCandidateTDK: View {
   public weak var controller: CtlCandidateTDK?
   @Environment(\.colorScheme) var colorScheme
-  @State public var thePool: CandidatePool
+  @Backport.StateObject public var thePool: CandidatePool
   @State public var forceCatalinaCompatibility: Bool = false
   var tooltip: String { thePool.tooltip }
   var reverseLookupResult: [String] { thePool.reverseLookupResult }