Add BlockingToolbar

macos/Classes/BlockingToolbar.swift

@@ -0,0 +1,52 @@
+//
+//  BlockingToolbar.swift
+//  macos_window_utils
+//
+//  Created by Ben Hagen on 12.11.2023.
+//
+
+import Foundation
+import FlutterMacOS
+
+class BlockingToolbar: NSToolbar, NSToolbarDelegate {
+  let flutterView: FlutterViewController
+
+  init(flutterView: FlutterViewController) {
+      self.flutterView = flutterView
+      super.init(identifier: "BlockingToolbar")
+  }
+
+  func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
+    [.flexibleSpace, NSToolbarItem.Identifier("BlockingItem")]
+  }
+
+  func toolbarAllowedItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
+    toolbarDefaultItemIdentifiers(toolbar)
+  }
+
+  func toolbar(_ toolbar: NSToolbar, itemForItemIdentifier itemIdentifier: NSToolbarItem.Identifier, willBeInsertedIntoToolbar flag: Bool) -> NSToolbarItem? {
+    if itemIdentifier == NSToolbarItem.Identifier("BlockingItem") {
+      let item = NSToolbarItem(itemIdentifier: itemIdentifier)
+      let view = ForwardingView()
+      view.flutterView = flutterView
+      view.widthAnchor.constraint(lessThanOrEqualToConstant: 100000).isActive = true
+      view.widthAnchor.constraint(greaterThanOrEqualToConstant: 1).isActive = true
+      item.view = view
+      return item
+    }
+    return nil
+  }
+}
+
+
+class ForwardingView: NSView {
+  var flutterView: FlutterViewController?
+
+  override func mouseDown(with event: NSEvent) {
+    flutterView!.mouseDown(with: event)
+  }
+
+  override func mouseUp(with event: NSEvent) {
+    flutterView!.mouseUp(with: event)
+  }
+}

macos/Classes/MainFlutterWindowManipulator.swift

@@ -402,9 +402,10 @@ public class MainFlutterWindowManipulator {
         }
 
         if #available(macOS 10.13, *) {
-            let newToolbar = NSToolbar()
-
-            self.mainFlutterWindow!.toolbar = newToolbar
+          let customToolbar = BlockingToolbar(flutterView: (self.mainFlutterWindow?.contentViewController as! MacOSWindowUtilsViewController).flutterViewController)
+            customToolbar.showsBaselineSeparator = false
+            customToolbar.delegate = customToolbar
+            self.mainFlutterWindow!.toolbar = customToolbar
         }
     }