UEFMDirectoryWatcher

Monitors an entire directory for changes. Reports added, modified, and removed files.

Delegate

FOnDirectoryChanged

DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnDirectoryChanged, const TArray<FString>&, Added, const TArray<FString>&, Modified, const TArray<FString>&, Removed)

Parameter	Type	Description
Added	TArray<FString>	Files that were added
Modified	TArray<FString>	Files that were modified
Removed	TArray<FString>	Files that were removed

Functions

StartWatching

Callable Starts watching a directory.

C++

bool StartWatching(const FString& DirectoryPath)

Parameter	Type	Description
DirectoryPath	FString	Full path to the directory to watch

Returns: true if watching started successfully

Category: EFM|Watcher

Blueprint Node

ƒStart Watching

Directory Path

Return Value

StopWatching

Callable Stops watching.

C++

void StopWatching()

Category: EFM|Watcher

Blueprint Node

ƒStop Watching

IsWatching

Pure Checks if currently watching.

C++

bool IsWatching() const

Category: EFM|Watcher

Blueprint Node

ƒIs Watching

Return Value

Properties

OnDirectoryChanged

Assignable Event fired when the watched directory changes.

UPROPERTY(BlueprintAssignable)
FOnDirectoryChanged OnDirectoryChanged

Example

// Create watcher
DirWatcher = Create UEFMDirectoryWatcher

// Bind event
DirWatcher.OnDirectoryChanged = OnDirectoryChangedEvent

// Start watching
DirWatcher.StartWatching(GetGameSavedDirectory() + "Mods/")

// OnDirectoryChangedEvent(Added, Modified, Removed):
//   for NewFile in Added:
//     Log("New file: " + NewFile)
//     LoadMod(NewFile)
//
//   for ChangedFile in Modified:
//     Log("Modified: " + ChangedFile)
//     ReloadMod(ChangedFile)
//
//   for DeletedFile in Removed:
//     Log("Removed: " + DeletedFile)
//     UnloadMod(DeletedFile)

// Stop watching when done
DirWatcher.StopWatching()