Urho3D::FileWatcher Class Reference

Watches a directory and its subdirectories for files being modified. More...

#include <Urho3D/IO/FileWatcher.h>

Inheritance diagram for Urho3D::FileWatcher:

Collaboration diagram for Urho3D::FileWatcher:

Public Member Functions
	FileWatcher (Context *context)
	Construct.
	~FileWatcher () override
	Destruct.
void	ThreadFunction () override
	Directory watching loop.
bool	StartWatching (const String &pathName, bool watchSubDirs)
	Start watching a directory. Return true if successful.
void	StopWatching ()
	Stop watching the directory.
void	SetDelay (float interval)
	Set the delay in seconds before file changes are notified. This (hopefully) avoids notifying when a file save is still in progress. Default 1 second.
void	AddChange (const String &fileName)
	Add a file change into the changes queue.
bool	GetNextChange (String &dest)
	Return a file change (true if was found, false if not).
const String &	GetPath () const
	Return the path being watched, or empty if not watching.
float	GetDelay () const
	Return the delay in seconds for notifying file changes.
Public Member Functions inherited from Urho3D::Object
	Object (Context *context)
	Construct.
	~Object () override
	Destruct. Clean up self from event sender & receiver structures.
virtual StringHash	GetType () const =0
virtual const String &	GetTypeName () const =0
virtual const TypeInfo *	GetTypeInfo () const =0
	Return type info.
virtual void	OnEvent (Object *sender, StringHash eventType, VariantMap &eventData)
	Handle event.
bool	IsInstanceOf (StringHash type) const
	Check current instance is type of specified type.
bool	IsInstanceOf (const TypeInfo *typeInfo) const
	Check current instance is type of specified type.
template<typename T >
bool	IsInstanceOf () const
	Check current instance is type of specified class.
template<typename T >
T *	Cast ()
	Cast the object to specified most derived class.
template<typename T >
const T *	Cast () const
	Cast the object to specified most derived class.
void	SubscribeToEvent (StringHash eventType, EventHandler *handler)
	Subscribe to an event that can be sent by any sender.
void	SubscribeToEvent (Object *sender, StringHash eventType, EventHandler *handler)
	Subscribe to a specific sender's event.
void	SubscribeToEvent (StringHash eventType, const std::function< void(StringHash, VariantMap &)> &function, void *userData=nullptr)
	Subscribe to an event that can be sent by any sender.
void	SubscribeToEvent (Object *sender, StringHash eventType, const std::function< void(StringHash, VariantMap &)> &function, void *userData=nullptr)
	Subscribe to a specific sender's event.
void	UnsubscribeFromEvent (StringHash eventType)
	Unsubscribe from an event.
void	UnsubscribeFromEvent (Object *sender, StringHash eventType)
	Unsubscribe from a specific sender's event.
void	UnsubscribeFromEvents (Object *sender)
	Unsubscribe from a specific sender's events.
void	UnsubscribeFromAllEvents ()
	Unsubscribe from all events.
void	UnsubscribeFromAllEventsExcept (const PODVector< StringHash > &exceptions, bool onlyUserData)
	Unsubscribe from all events except those listed, and optionally only those with userdata (script registered events).
void	SendEvent (StringHash eventType)
	Send event to all subscribers.
void	SendEvent (StringHash eventType, VariantMap &eventData)
	Send event with parameters to all subscribers.
VariantMap &	GetEventDataMap () const
	Return a preallocated map for event data. Used for optimization to avoid constant re-allocation of event data maps.
template<typename... Args>
void	SendEvent (StringHash eventType, Args... args)
	Send event with variadic parameter pairs to all subscribers. The parameter pairs is a list of paramID and paramValue separated by comma, one pair after another.
Context *	GetContext () const
	Return execution context.
const Variant &	GetGlobalVar (StringHash key) const
const VariantMap &	GetGlobalVars () const
void	SetGlobalVar (StringHash key, const Variant &value)
Object *	GetSubsystem (StringHash type) const
	Return subsystem by type.
Object *	GetEventSender () const
	Return active event sender. Null outside event handling.
EventHandler *	GetEventHandler () const
	Return active event handler. Null outside event handling.
bool	HasSubscribedToEvent (StringHash eventType) const
	Return whether has subscribed to an event without specific sender.
bool	HasSubscribedToEvent (Object *sender, StringHash eventType) const
	Return whether has subscribed to a specific sender's event.
bool	HasEventHandlers () const
	Return whether has subscribed to any event.
template<class T >
T *	GetSubsystem () const
	Template version of returning a subsystem.
const String &	GetCategory () const
void	SetBlockEvents (bool block)
	Block object from sending and receiving events.
bool	GetBlockEvents () const
	Return sending and receiving events blocking status.
Public Member Functions inherited from Urho3D::RefCounted
	RefCounted ()
	Construct. Allocate the reference count structure and set an initial self weak reference.
virtual	~RefCounted ()
	Destruct. Mark as expired and also delete the reference count structure if no outside weak references exist.
	RefCounted (const RefCounted &rhs)=delete
	Prevent copy construction.
RefCounted &	operator= (const RefCounted &rhs)=delete
	Prevent assignment.
void	AddRef ()
	Increment reference count. Can also be called outside of a SharedPtr for traditional reference counting.
void	ReleaseRef ()
	Decrement reference count and delete self if no more references. Can also be called outside of a SharedPtr for traditional reference counting.
int	Refs () const
int	WeakRefs () const
RefCount *	RefCountPtr ()
	Return pointer to the reference count structure.
Public Member Functions inherited from Urho3D::Thread
	Thread ()
	Construct. Does not start the thread yet.
virtual	~Thread ()
	Destruct. If running, stop and wait for thread to finish.
bool	Run ()
	Start running the thread. Return true if successful, or false if already running or if can not create the thread.
void	Stop ()
	Set the running flag to false and wait for the thread to finish.
void	SetPriority (int priority)
	Set thread priority. The thread must have been started first.
bool	IsStarted () const
	Return whether thread exists.

Private Member Functions
	URHO3D_OBJECT (FileWatcher, Object)

Private Attributes
SharedPtr< FileSystem >	fileSystem_
	Filesystem.
String	path_
	The path being watched.
HashMap< String, Timer >	changes_
	Pending changes. These will be returned and removed from the list when their timer has exceeded the delay.
Mutex	changesMutex_
	Mutex for the change buffer.
float	delay_
	Delay in seconds for notifying changes.
bool	watchSubDirs_
	Watch subdirectories flag.

Additional Inherited Members
Static Public Member Functions inherited from Urho3D::Object
static const TypeInfo *	GetTypeInfoStatic ()
	Return type info static.
Static Public Member Functions inherited from Urho3D::Thread
static void	SetMainThread ()
	Set the current thread as the main thread.
static ThreadID	GetCurrentThreadID ()
static bool	IsMainThread ()
	Return whether is executing in the main thread.
Protected Attributes inherited from Urho3D::Object
Context *	context_
	Execution context.
Protected Attributes inherited from Urho3D::Thread
void *	handle_
	Thread handle.
volatile bool	shouldRun_
	Running flag.
Static Protected Attributes inherited from Urho3D::Thread
static ThreadID	mainThreadID
	Main thread's thread ID.

Detailed Description

Watches a directory and its subdirectories for files being modified.

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The documentation for this class was generated from the following files:

• Source/Urho3D/IO/FileWatcher.h
• Source/Urho3D/IO/FileWatcher.cpp