Events recorder

The event recorder.

ROOT EVENT RECORDING SYSTEM

TRecorder class provides interface for recording and replaying events in ROOT. Recorded events are:

• Commands typed by user in commandline ('new TCanvas')
• GUI events (mouse movement, button clicks, ...)

All the recorded events from one session are stored in one TFile and can be replayed again anytime.

Recording

1] To start recording

TRecorder r(const char *filename, "NEW")
TRecorder r(const char *filename, "RECREATE")

or:

TRecorder *recorder = new TRecorder;
recorder->Start(const char *filename, ...)

• filename: Name of ROOT file in which to save recorded events.

2] To stop recording

recorder->Stop()

IMPORTANT: State capturing is part of recording. It means that if you want to record events for some object (window), creation of this object must be also recorded.

Example:

t = new TRecorder();          // Create a new recorder
t->Start("logfile.root");     // ! Start recording first
 
c = new TCanvas();            // ! Then, create an object
c->Dump();                    // Work with that object
 
t->Stop();                    // Stop recording

It is strongly recommended to start recording with empty ROOT environment, at least with no previously created ROOT GUI. This ensures that only events for well known windows are stored. Events for windows, which were not created during recording, cannot be replayed.

Replaying

1] To start replaying

TRecorder r(const char *filename)
TRecorder r(const char *filename, "READ")

or:

TRecorder *recorder = new TRecorder;
recorder->Replay(const char *filename,
                  Bool_t showMouseCursor = kTRUE);

• filename: A name of file with recorded events previously created with TRecorder::Start
• showMouseCursor: If kTRUE, mouse cursor is replayed as well. In that case it is not recommended to use mouse during replaying.

In general, it is not recommended to use mouse to change positions and states of ROOT windows during replaying.

IMPORTANT: The state of ROOT environment before replaying of some events must be exactly the same as before recording them. Therefore it is strongly recommended to start both recording and replaying with empty ROOT environment.

2] To pause replaying

recorder->Pause()

Replaying is stopped until recorder->Resume() is called.

3] To resume paused replaying

recorder->Resume()

Resumes previously stopped replaying.

4] To stop replaying before its end

recorder->Stop()

Classes
class	TGRecorder
	Provides GUI for TRecorder class. More...
class	TRecCmdEvent
	Class used for storing information about 1 commandline event. More...
class	TRecEvent
	Abstract class that defines interface for a class storing information about 1 ROOT event. More...
class	TRecExtraEvent
	class TRecExtraEvent More...
class	TRecGuiEvent
	class TRecGuiEvent More...
class	TRecorder
	Class provides direct recorder/replayer interface for a user. More...
class	TRecorderInactive
	Represents state of TRecorder just after its creation. More...
class	TRecorderPaused
	Represents state of TRecorder when replaying was paused by a user. More...
class	TRecorderRecording
	Represents state of TRecorder when recording events. More...
class	TRecorderReplaying
	Represents state of TRecorder when replaying previously recorded events. More...
class	TRecorderState
	Abstract class that defines interface for a state of recorder. More...
class	TRecWinPair
	Class used for storing of window IDs mapping. More...