util::ROOT::TStyleChanger Class Reference

A class restoring the previous TStyle on destruction. More...

#include <ROOTutils.h>

Public Member Functions
	TStyleChanger ()
	TStyleChanger (TStyle *newStyle)
	~TStyleChanger ()
void	save ()
	Stores the current style as the one to be saved. More...
void	restore () const
void	forget ()
	Do not restore the old style on destruction. More...
void	cd () const
	Make the stored new style as current again. More...
void	cd (TStyle *newStyle)
	Make the specified style as current. More...
TStyle *	saved () const
	Returns a pointer to the style that will be restored on destruction. More...
bool	hasSaved () const
	Returns whether there is a style to be restored on destruction. More...

Private Attributes
TStyle *	pSaved = nullptr
TStyle *	pNew = nullptr

Detailed Description

A class restoring the previous TStyle on destruction.

When an instance of this object is created, the existing current style is saved, and it is then restored on destruction.

Additional methods allow finer control on the restoration feature.

Example:

{
  TStyleChanger StyleGuard
    (static_cast<TStyle*>(gDirectory->Get("newStyle")));

  // everything here happens in the new style
}

// whatever follows happens under the previous style

Definition at line 127 of file ROOTutils.h.

Constructor & Destructor Documentation

util::ROOT::TStyleChanger::TStyleChanger ( )

inline

Definition at line 134 of file ROOTutils.h.

{ save(); }

util::ROOT::TStyleChanger::TStyleChanger ( TStyle *  newStyle )

inline

Definition at line 135 of file ROOTutils.h.

{ save(); cd(newStyle); }

util::ROOT::TStyleChanger::~TStyleChanger ( )

inline

Definition at line 137 of file ROOTutils.h.

{ restore(); }

Member Function Documentation

void util::ROOT::TStyleChanger::cd ( ) const

inline

Make the stored new style as current again.

Definition at line 150 of file ROOTutils.h.

{ if (pNew) pNew->cd(); }

void util::ROOT::TStyleChanger::cd ( TStyle *  newStyle )

inline

Make the specified style as current.

Definition at line 153 of file ROOTutils.h.

{ pNew = newStyle; cd(); }

void util::ROOT::TStyleChanger::forget ( )

inline

Do not restore the old style on destruction.

Definition at line 147 of file ROOTutils.h.

{ pSaved = nullptr; }

bool util::ROOT::TStyleChanger::hasSaved ( ) const

inline

Returns whether there is a style to be restored on destruction.

Definition at line 159 of file ROOTutils.h.

{ return saved() != nullptr; }

void util::ROOT::TStyleChanger::restore ( ) const

inline

Immediately restores the old style. It will still restored on destruction too.

Definition at line 144 of file ROOTutils.h.

{ if (pSaved) pSaved->cd(); }

void util::ROOT::TStyleChanger::save ( )

inline

Stores the current style as the one to be saved.

Definition at line 140 of file ROOTutils.h.

{ pSaved = gStyle; }

TStyle* util::ROOT::TStyleChanger::saved ( ) const

inline

Returns a pointer to the style that will be restored on destruction.

Definition at line 156 of file ROOTutils.h.

{ return pSaved; }

Member Data Documentation

TStyle* util::ROOT::TStyleChanger::pNew = nullptr

private

Definition at line 130 of file ROOTutils.h.

TStyle* util::ROOT::TStyleChanger::pSaved = nullptr

private

Definition at line 129 of file ROOTutils.h.

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

• ROOTutils.h