Custom Notifications

Notifications are configured on UOperatingSystem via FOperatingSystemNotificationSettings and displayed through your UOperatingSystemWidget implementation.

Setting	Purpose
bEnableNotifications	Master toggle
bPlayNotificationSound	Audio feedback
ToastNotificationTime	Seconds on screen (UMG must implement toast UI)
NotificationSoundDefault / Warning / Error	USoundBase assets

sequenceDiagram
  participant Prog as UOperatingSystemBaseProgram
  participant OS as UOperatingSystem
  participant Widget as UOperatingSystemWidget
  Prog->>OS: SendNotification(title, message, type)
  OS->>Widget: On Notification Received event
  Widget->>Widget: Show toast + NotificationSound

Blueprint — send from a program

When your program installs, completes a task, or receives mail:

Get Operating System
  → Send Notification
      Title: "Download complete"
      Message: "Patch 1.2 ready to install"
      Type: Info / Warning / Error

The exact node name matches Send Notification on UOperatingSystem — search with the OS reference pinned.

Implement On Notification Received on your OS widget Blueprint to animate the toast (bundled WBP_OS provides a starting layout).

Program install notifications

On UOperatingSystemBaseProgram, enable Create Notification to auto-toast when the program installs from Store or setup.

C++ — trigger notification

#include "Core/OperatingSystem.h"

void UMyProgram::OnTaskComplete()
{
    if (UOperatingSystem* OS = GetOperatingSystem())
    {
        OS->SendNotification(
            FText::FromString(TEXT("Task complete")),
            FText::FromString(TEXT("All files synced.")),
            EOperatingSystemNotificationType::Info);
    }
}

Use the enum and method signatures from UOperatingSystem API for your version.

Custom toast UI

Override on your OS widget subclass:

On Notification Received — Blueprint implementable event on UOperatingSystemWidget

Style to match your game’s OS theme; Theme module colors apply to other widgets via IOperatingSystemThemeInterface.