small helper class to store/restore gPad context in TPad methods

Small helper class to preserve gPad, which will be restored when TContext object is destroyed.

Definition at line 61 of file TVirtualPad.h.

Public Member Functions
	TContext (Bool_t _interactive=kFALSE)
	Constructor which just store gPad.

	TContext (TVirtualPad *gpad, Bool_t interactive=kFALSE, Bool_t not_null=kFALSE)
	Constructor which stores gPad and set it to new value.

	~TContext ()
	Destructor Restores previous value of gPad.

auto	GetSaved () const

auto	IsInteractive () const

void	PadDeleted (TVirtualPad *pad)
	Inform context that pad deleted or will be deleted soon Reference on that pad should be cleared.

Private Attributes
Bool_t	fInteractive {kFALSE}

TVirtualPad *	fSaved {nullptr}

#include <TVirtualPad.h>

Constructor & Destructor Documentation

◆ TContext() [1/2]

TVirtualPad::TContext::TContext ( Bool_t _interactive = kFALSE )

Constructor which just store gPad.

Parameters

_interactive defines how gPad will be restored: with cd() call (kTRUE) or just by assign gPad back

Definition at line 36 of file TVirtualPad.cxx.

◆ TContext() [2/2]

TVirtualPad::TContext::TContext	(	TVirtualPad *	gpad,
		Bool_t	interactive = `kFALSE`,
		Bool_t	not_null = `kFALSE`
	)

Constructor which stores gPad and set it to new value.

Parameters

interactive	defines how gPad will be restored: with cd() call (kTRUE) or just by assign gPad back
not_null	allows to set only pad which is not null

Definition at line 47 of file TVirtualPad.cxx.

◆ ~TContext()

TVirtualPad::TContext::~TContext ( )

Destructor Restores previous value of gPad.

Definition at line 61 of file TVirtualPad.cxx.

Member Function Documentation

◆ GetSaved()

auto TVirtualPad::TContext::GetSaved ( ) const

inline

Definition at line 69 of file TVirtualPad.h.

◆ IsInteractive()

auto TVirtualPad::TContext::IsInteractive ( ) const

inline

Definition at line 68 of file TVirtualPad.h.

◆ PadDeleted()

void TVirtualPad::TContext::PadDeleted ( TVirtualPad * pad )

Inform context that pad deleted or will be deleted soon Reference on that pad should be cleared.

Definition at line 73 of file TVirtualPad.cxx.

Member Data Documentation

◆ fInteractive

Bool_t TVirtualPad::TContext::fInteractive {kFALSE}

private

Definition at line 62 of file TVirtualPad.h.

◆ fSaved

TVirtualPad* TVirtualPad::TContext::fSaved {nullptr}