Provides a pool of fonts.

Definition at line 217 of file TGFont.h.

Public Member Functions
	TGFontPool (TGClient *client)
	Create a font pool.

	~TGFontPool () override
	Cleanup font pool.

TGFont *	FindFont (FontStruct_t font) const
	Find font based on its font struct. Returns 0 if font is not found.

TGFont *	FindFontByHandle (FontH_t font) const
	Find font based on its font handle. Returns 0 if font is not found.

void	FreeAttributeInfo (char **info)
	Free attributes info.

void	FreeFont (const TGFont *font)
	Free font. If ref count is 0 delete font.

void	FreeFontFamilies (char **f)
	Delete an array of families allocated GetFontFamilies() method.

char **	GetAttributeInfo (const FontAttributes_t *fa)
	Return information about the font attributes as an array of strings.

TGFont *	GetFont (const char *family, Int_t ptsize, Int_t weight, Int_t slant)
	Returns font specified bay family, pixel/point size, weight and slant negative value of ptsize means size in pixels positive value of ptsize means size in points.

TGFont *	GetFont (const char *font, Bool_t fixedDefault=kTRUE)
	Get the specified font.

TGFont *	GetFont (const TGFont *font)
	Use font, i.e.

TGFont *	GetFont (FontStruct_t font)
	Use font, i.e. increases ref count of specified font.

char **	GetFontFamilies ()
	Return information about the font families that are available on the current display.

TClass *	IsA () const override

const char *	NameOfFont (TGFont *font)
	Given a font, return a textual string identifying it.

Bool_t	ParseFontName (const char string, FontAttributes_t fa)
	Converts a string into a set of font attributes that can be used to construct a font.

void	Print (Option_t *option="") const override
	List all fonts in the pool.

void	Streamer (TBuffer &) override
	Stream an object of class TObject.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TGObject
	TGObject ()

	TGObject (const TGObject &tgo)

	~TGObject () override
	TGObject destructor.

TGClient *	GetClient () const

Handle_t	GetId () const

ULong_t	Hash () const override
	Return hash value for this object.

TClass *	IsA () const override

Bool_t	IsEqual (const TObject *obj) const override
	Equal comparison (TGObjects are equal if they have the same window identifier).

void	SaveAs (const char filename="", Option_t option="") const override
	Write this TGObject to a file using TImage, if filename's extension signals a valid TImage::EImageFileType, as defined by TImage::GetImageFileTypeFromFilename().

void	Streamer (TBuffer &) override
	Stream an object of class TObject.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract.

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action.

ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

virtual const char *	ClassName () const
	Returns name of class to which the object belongs.

virtual void	Clear (Option_t *="")

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility.

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method.

virtual void	Copy (TObject &object) const
	Copy this to obj.

virtual void	Delete (Option_t *option="")
	Delete this object.

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object.

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects.

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad with: `gROOT->SetSelectedPad(c1)`.

virtual void	Dump () const
	Dump contents of object on stdout.

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message.

virtual void	Execute (const char method, const char params, Int_t *error=nullptr)
	Execute method on this object with the given parameter string, e.g.

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=nullptr)
	Execute method on this object with parameters stored in the TObjArray.

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py).

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message.

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes.

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes.

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.

virtual const char *	GetIconName () const
	Returns mime type name of object.

virtual const char *	GetName () const
	Returns name of object.

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py).

virtual Option_t *	GetOption () const

virtual const char *	GetTitle () const
	Returns title of object.

virtual UInt_t	GetUniqueID () const
	Return the unique object id.

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.

Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message.

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.

void	InvertBit (UInt_t f)

Bool_t	IsDestructed () const
	IsDestructed.

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

virtual Bool_t	IsSortable () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout.

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification (the base implementation is no-op).

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.

void	operator delete (void *ptr)
	Operator delete.

void	operator delete (void ptr, void vp)
	Only called by placement new when throwing an exception.

void	operator delete[] (void *ptr)
	Operator delete [].

void	operator delete[] (void ptr, void vp)
	Only called by placement new[] when throwing an exception.

void *	operator new (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz)

void *	operator new[] (size_t sz, void *vp)

TObject &	operator= (const TObject &rhs)
	TObject assignment operator.

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself.

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list.

void	ResetBit (UInt_t f)

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out".

void	SetBit (UInt_t f)

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message.

R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message.

virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.

virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.

Static Public Member Functions
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Static Public Member Functions inherited from TGObject
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Static Public Member Functions inherited from TObject
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static Longptr_t	GetDtorOnly ()
	Return destructor only flag.

static Bool_t	GetObjectStat ()
	Get status of object stat flag.

static void	SetDtorOnly (void *obj)
	Set destructor only flag.

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable.

Protected Member Functions
Bool_t	FieldSpecified (const char *field)
	Helper function for ParseXLFD().

int	FindStateNum (const FontStateMap_t map, const char strKey)
	Given a lookup table, map a string to a number in the table.

const char *	FindStateString (const FontStateMap_t *map, int numKey)
	Given a lookup table, map a number to a string in the table.

TGFont *	GetFontFromAttributes (FontAttributes_t fa, TGFont fontPtr)
	Given a desired set of attributes for a font, find a font with the closest matching attributes and create a new TGFont object.

TGFont *	GetNativeFont (const char *name, Bool_t fixedDefault=kTRUE)
	The return value is a pointer to an TGFont object that represents the native font.

const char *	GetUid (const char *string)
	Given a string, this procedure returns a unique identifier for the string.

TGFont *	MakeFont (TGFont font, FontStruct_t fontStruct, const char fontName)
	Helper for GetNativeFont() and GetFontFromAttributes().

Bool_t	ParseXLFD (const char string, XLFDAttributes_t xa)
	Break up a fully specified XLFD into a set of font attributes.

Protected Member Functions inherited from TGObject
TGObject &	operator= (const TGObject &tgo)

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected).

void	MakeZombie ()

Private Member Functions
	TGFontPool (const TGFontPool &fp)=delete

TGFontPool &	operator= (const TGFontPool &fp)=delete

Private Attributes
THashTable *	fList

THashTable *	fNamedTable

THashTable *	fUidTable

Additional Inherited Members
Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

enum	{ kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) }

enum	EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }

enum	EStatusBits { kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) , kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) }

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }

Protected Attributes inherited from TGObject
TGClient *	fClient
	Connection to display server.

Handle_t	fId
	X11/Win32 Window identifier.

#include <TGFont.h>

Inheritance diagram for TGFontPool:

[legend]

Constructor & Destructor Documentation

◆ TGFontPool() [1/2]

TGFontPool::TGFontPool ( const TGFontPool & fp )

privatedelete

◆ TGFontPool() [2/2]

TGFontPool::TGFontPool ( TGClient * client )

Create a font pool.

Definition at line 1528 of file TGFont.cxx.

◆ ~TGFontPool()

TGFontPool::~TGFontPool ( )

override

Cleanup font pool.

Definition at line 1544 of file TGFont.cxx.

Member Function Documentation

◆ Class()

static TClass * TGFontPool::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TGFontPool::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TGFontPool::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 260 of file TGFont.h.

◆ DeclFileName()

static const char * TGFontPool::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 260 of file TGFont.h.

◆ FieldSpecified()

Bool_t TGFontPool::FieldSpecified ( const char * field )

protected

Helper function for ParseXLFD().

Determines if a field in the XLFD was set to a non-null, non-don't-care value.

The return value is kFALSE if the field in the XLFD was not set and should be ignored, kTRUE otherwise.

field – The field of the XLFD to check. Strictly speaking, only when the string is "*" does it mean don't-care. However, an unspecified or question mark is also interpreted as don't-care.

Definition at line 2247 of file TGFont.cxx.

◆ FindFont()

TGFont * TGFontPool::FindFont ( FontStruct_t font ) const

Find font based on its font struct. Returns 0 if font is not found.

Definition at line 1744 of file TGFont.cxx.

◆ FindFontByHandle()

TGFont * TGFontPool::FindFontByHandle ( FontH_t font ) const

Find font based on its font handle. Returns 0 if font is not found.

Definition at line 1761 of file TGFont.cxx.

◆ FindStateNum()

Int_t TGFontPool::FindStateNum	(	const FontStateMap_t *	map,
		const char *	strKey
	)

protected

Given a lookup table, map a string to a number in the table.

If strKey was equal to the string keys of one of the elements in the table, returns the numeric key of that element. Returns the numKey associated with the last element (the NULL string one) in the table if strKey was not equal to any of the string keys in the table.

Definition at line 2205 of file TGFont.cxx.

◆ FindStateString()

const char * TGFontPool::FindStateString	(	const FontStateMap_t *	map,
		int	numKey
	)

protected

Given a lookup table, map a number to a string in the table.

If numKey was equal to the numeric key of one of the elements in the table, returns the string key of that element. Returns NULL if numKey was not equal to any of the numeric keys in the table

Definition at line 2228 of file TGFont.cxx.

◆ FreeAttributeInfo()

void TGFontPool::FreeAttributeInfo ( char ** info )

Free attributes info.

Definition at line 1859 of file TGFont.cxx.

◆ FreeFont()

void TGFontPool::FreeFont ( const TGFont * font )

Free font. If ref count is 0 delete font.

Definition at line 1718 of file TGFont.cxx.

◆ FreeFontFamilies()

void TGFontPool::FreeFontFamilies ( char ** f )

Delete an array of families allocated GetFontFamilies() method.

Definition at line 2333 of file TGFont.cxx.

◆ GetAttributeInfo()

char ** TGFontPool::GetAttributeInfo ( const FontAttributes_t * fa )

Return information about the font attributes as an array of strings.

An array of FONT_NUMFIELDS strings is returned holding the value of the font attributes in the following order: family size weight slant underline overstrike

Definition at line 1805 of file TGFont.cxx.

◆ GetFont() [1/4]

TGFont * TGFontPool::GetFont	(	const char *	family,
		Int_t	ptsize,
		Int_t	weight,
		Int_t	slant
	)

Returns font specified bay family, pixel/point size, weight and slant negative value of ptsize means size in pixels positive value of ptsize means size in points.

For example: TGFont *font = fpool->GetFont("helvetica", -9, kFontWeightNormal, kFontSlantRoman); font->Print();

Definition at line 1696 of file TGFont.cxx.

◆ GetFont() [2/4]

TGFont * TGFontPool::GetFont	(	const char *	font,
		Bool_t	fixedDefault = `kTRUE`
	)

Get the specified font.

The font can be one of the following forms: XLFD (see X documentation) "Family [size [style] [style ...]]" Returns 0 if error or no font can be found. If fixedDefault is false the "fixed" font will not be substituted as fallback when the asked for font does not exist.

Definition at line 1558 of file TGFont.cxx.

◆ GetFont() [3/4]

TGFont * TGFontPool::GetFont ( const TGFont * font )

Use font, i.e.

increases ref count of specified font. Returns 0 if font is not found.

Definition at line 1655 of file TGFont.cxx.

◆ GetFont() [4/4]

TGFont * TGFontPool::GetFont ( FontStruct_t font )

Use font, i.e. increases ref count of specified font.

Definition at line 1670 of file TGFont.cxx.

◆ GetFontFamilies()

char ** TGFontPool::GetFontFamilies ( )

Return information about the font families that are available on the current display.

An array of strings is returned holding a list of all the available font families. The array is terminated with a NULL pointer.

Definition at line 2274 of file TGFont.cxx.

◆ GetFontFromAttributes()

TGFont * TGFontPool::GetFontFromAttributes	(	FontAttributes_t *	fa,
		TGFont *	fontPtr
	)

protected

Given a desired set of attributes for a font, find a font with the closest matching attributes and create a new TGFont object.

The return value is a pointer to a TGFont object that represents the font with the desired attributes. If a font with the desired attributes could not be constructed, some other font will be substituted automatically.

Every call to this procedure returns a new TGFont object, even if the specified attributes have already been seen before.

Definition at line 2356 of file TGFont.cxx.

◆ GetNativeFont()

TGFont * TGFontPool::GetNativeFont	(	const char *	name,
		Bool_t	fixedDefault = `kTRUE`
	)

protected

The return value is a pointer to an TGFont object that represents the native font.

If a native font by the given name could not be found, the return value is NULL.

Every call to this procedure returns a new TGFont object, even if the name has already been seen before. The caller should call FreeFont when the font is no longer needed.

Definition at line 2565 of file TGFont.cxx.

◆ GetUid()

const char * TGFontPool::GetUid ( const char * string )

protected

Given a string, this procedure returns a unique identifier for the string.

This procedure returns a pointer to a new char string corresponding to the "string" argument. The new string has a value identical to string (strcmp will return 0), but it's guaranteed that any other calls to this procedure with a string equal to "string" will return exactly the same result (i.e. can compare pointer values directly, without having to call strcmp on what they point to).

Definition at line 1785 of file TGFont.cxx.

◆ IsA()

TClass * TGFontPool::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TObject.

Definition at line 260 of file TGFont.h.

◆ MakeFont()

TGFont * TGFontPool::MakeFont	(	TGFont *	font,
		FontStruct_t	fontStruct,
		const char *	fontName
	)

protected

Helper for GetNativeFont() and GetFontFromAttributes().

Creates and initializes a new TGFont object.

font – If non-NULL, store the information in this existing TGFont object, rather than creating a new one; the existing contents of the font will be released. If NULL, a new TGFont object is created. fontStruct – information about font. fontName – The string passed to TVirtualX::LoadQueryFont() to construct the fontStruct.

Definition at line 2590 of file TGFont.cxx.

◆ NameOfFont()

const char * TGFontPool::NameOfFont ( TGFont * font )

Given a font, return a textual string identifying it.

Definition at line 2262 of file TGFont.cxx.

◆ operator=()

TGFontPool & TGFontPool::operator= ( const TGFontPool & fp )

privatedelete

◆ ParseFontName()

Bool_t TGFontPool::ParseFontName	(	const char *	string,
		FontAttributes_t *	fa
	)

Converts a string into a set of font attributes that can be used to construct a font.

The string can be one of the following forms: XLFD (see X documentation) "Family [size [style] [style ...]]"

The return value is kFALSE if the object was syntactically invalid. Otherwise, fills the font attribute buffer with the values parsed from the string and returns kTRUE. The structure must already be properly initialized.

Definition at line 1962 of file TGFont.cxx.

◆ ParseXLFD()

Bool_t TGFontPool::ParseXLFD	(	const char *	string,
		XLFDAttributes_t *	xa
	)

protected

Break up a fully specified XLFD into a set of font attributes.

Return value is kFALSE if string was not a fully specified XLFD. Otherwise, fills font attribute buffer with the values parsed from the XLFD and returns kTRUE.

string – Parseable font description string. xa – XLFD attributes structure whose fields are to be modified. Structure must already be properly initialized.

Definition at line 2054 of file TGFont.cxx.

◆ Print()

void TGFontPool::Print ( Option_t * option = "" ) const

overridevirtual

List all fonts in the pool.

Reimplemented from TObject.

Definition at line 1876 of file TGFont.cxx.

◆ Streamer()

void TGFontPool::Streamer ( TBuffer & R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from TObject.

◆ StreamerNVirtual()

void TGFontPool::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 260 of file TGFont.h.

Member Data Documentation

◆ fList

THashTable* TGFontPool::fList

private

Definition at line 220 of file TGFont.h.

◆ fNamedTable

THashTable* TGFontPool::fNamedTable

private

Definition at line 222 of file TGFont.h.

◆ fUidTable

THashTable* TGFontPool::fUidTable

private

Definition at line 221 of file TGFont.h.

Libraries for TGFontPool:

[legend]

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

gui/gui/inc/TGFont.h
gui/gui/src/TGFont.cxx

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ TGFontPool() [1/2]

◆ TGFontPool() [2/2]

◆ ~TGFontPool()

Member Function Documentation

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ DeclFileName()

◆ FieldSpecified()

◆ FindFont()

◆ FindFontByHandle()

◆ FindStateNum()

◆ FindStateString()

◆ FreeAttributeInfo()

◆ FreeFont()

◆ FreeFontFamilies()

◆ GetAttributeInfo()

◆ GetFont() [1/4]

◆ GetFont() [2/4]

◆ GetFont() [3/4]

◆ GetFont() [4/4]

◆ GetFontFamilies()

◆ GetFontFromAttributes()

◆ GetNativeFont()

◆ GetUid()

◆ IsA()

◆ MakeFont()

◆ NameOfFont()

◆ operator=()

◆ ParseFontName()

◆ ParseXLFD()

◆ Print()

◆ Streamer()

◆ StreamerNVirtual()

Member Data Documentation

◆ fList

◆ fNamedTable

◆ fUidTable