Logo ROOT   6.19/01
Reference Guide
TGFontPool Class Reference

Definition at line 226 of file TGFont.h.

Public Member Functions

 TGFontPool (TGClient *client)
 Create a font pool. More...
 
virtual ~TGFontPool ()
 Cleanup font pool. More...
 
TGFontFindFont (FontStruct_t font) const
 Find font based on its font struct. Returns 0 if font is not found. More...
 
TGFontFindFontByHandle (FontH_t font) const
 Find font based on its font handle. Returns 0 if font is not found. More...
 
void FreeAttributeInfo (char **info)
 Free attributes info. More...
 
void FreeFont (const TGFont *font)
 Free font. If ref count is 0 delete font. More...
 
void FreeFontFamilies (char **f)
 Delete an array of families allocated GetFontFamilies() method. More...
 
char ** GetAttributeInfo (const FontAttributes_t *fa)
 Return information about the font attributes as an array of strings. More...
 
TGFontGetFont (const char *font, Bool_t fixedDefault=kTRUE)
 Get the specified font. More...
 
TGFontGetFont (const TGFont *font)
 Use font, i.e. More...
 
TGFontGetFont (FontStruct_t font)
 Use font, i.e. increases ref count of specified font. More...
 
TGFontGetFont (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. More...
 
char ** GetFontFamilies ()
 Return information about the font families that are available on the current display. More...
 
const char * NameOfFont (TGFont *font)
 Given a font, return a textual string identifying it. More...
 
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. More...
 
void Print (Option_t *option="") const
 List all fonts in the pool. More...
 
- Public Member Functions inherited from TGObject
 TGObject ()
 
 TGObject (const TGObject &tgo)
 
virtual ~TGObject ()
 TGObject destructor. More...
 
TGClientGetClient () const
 
Handle_t GetId () const
 
ULong_t Hash () const
 Return hash value for this object. More...
 
Bool_t IsEqual (const TObject *obj) const
 Equal comparison (TGObjects are equal if they have the same window identifier). More...
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Write this TGObject to a file using TImage, if filename's extension signals a valid TImage::EImageFileType, as defined by TImage::GetImageFileTypeFromFilename(). More...
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. More...
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
virtual void Browse (TBrowser *b)
 Browse object. May be overridden for another default action. More...
 
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. More...
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs. More...
 
virtual void Clear (Option_t *="")
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility. More...
 
virtual Int_t Compare (const TObject *obj) const
 Compare abstract method. More...
 
virtual void Copy (TObject &object) const
 Copy this to obj. More...
 
virtual void Delete (Option_t *option="")
 Delete this object. More...
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object. More...
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects. More...
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Dump () const
 Dump contents of object on stdout. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. More...
 
virtual void Execute (const char *method, const char *params, Int_t *error=0)
 Execute method on this object with the given parameter string, e.g. More...
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
 Execute method on this object with parameters stored in the TObjArray. More...
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py). More...
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual const char * GetName () const
 Returns name of object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
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. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. More...
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname". More...
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl. More...
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas. More...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
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. More...
 
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). More...
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification. More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. More...
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself. More...
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list. More...
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory. More...
 
virtual void RecursiveRemove (TObject *obj)
 Recursively remove this object from a list. More...
 
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". More...
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. More...
 
void SetBit (UInt_t f)
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object. More...
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id. More...
 
virtual void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
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. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory. More...
 

Protected Member Functions

Bool_t FieldSpecified (const char *field)
 Helper function for ParseXLFD(). More...
 
int FindStateNum (const FontStateMap_t *map, const char *strKey)
 Given a lookup table, map a string to a number in the table. More...
 
const char * FindStateString (const FontStateMap_t *map, int numKey)
 Given a lookup table, map a number to a string in the table. More...
 
TGFontGetFontFromAttributes (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. More...
 
TGFontGetNativeFont (const char *name, Bool_t fixedDefault=kTRUE)
 The return value is a pointer to an TGFont object that represents the native font. More...
 
const char * GetUid (const char *string)
 Given a string, this procedure returns a unique identifier for the string. More...
 
TGFontMakeFont (TGFont *font, FontStruct_t fontStruct, const char *fontName)
 Helper for GetNativeFont() and GetFontFromAttributes(). More...
 
Bool_t ParseXLFD (const char *string, XLFDAttributes_t *xa)
 Break up a fully specified XLFD into a set of font attributes. More...
 
- Protected Member Functions inherited from TGObject
TGObjectoperator= (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). More...
 
void MakeZombie ()
 

Private Member Functions

 TGFontPool (const TGFontPool &fp)
 
TGFontPooloperator= (const TGFontPool &fp)
 

Private Attributes

THashTablefList
 
THashTablefNamedTable
 
THashTablefUidTable
 

Additional Inherited Members

- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kInconsistent = 0x08000000,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
 
enum  EStatusBits {
  kCanDelete = BIT(0), kMustCleanup = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5),
  kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13)
}
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 
- Protected Attributes inherited from TGObject
TGClientfClient
 
Handle_t fId
 

#include <TGFont.h>

Inheritance diagram for TGFontPool:
[legend]

Constructor & Destructor Documentation

◆ TGFontPool() [1/2]

TGFontPool::TGFontPool ( const TGFontPool fp)
private

◆ TGFontPool() [2/2]

TGFontPool::TGFontPool ( TGClient client)

Create a font pool.

Definition at line 1513 of file TGFont.cxx.

◆ ~TGFontPool()

TGFontPool::~TGFontPool ( )
virtual

Cleanup font pool.

Definition at line 1529 of file TGFont.cxx.

Member Function Documentation

◆ 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 2231 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 1729 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 1746 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 2189 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 2212 of file TGFont.cxx.

◆ FreeAttributeInfo()

void TGFontPool::FreeAttributeInfo ( char **  info)

Free attributes info.

Definition at line 1844 of file TGFont.cxx.

◆ FreeFont()

void TGFontPool::FreeFont ( const TGFont font)

Free font. If ref count is 0 delete font.

Definition at line 1703 of file TGFont.cxx.

◆ FreeFontFamilies()

void TGFontPool::FreeFontFamilies ( char **  f)

Delete an array of families allocated GetFontFamilies() method.

Definition at line 2317 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 1790 of file TGFont.cxx.

◆ GetFont() [1/4]

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 1543 of file TGFont.cxx.

◆ GetFont() [2/4]

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 1640 of file TGFont.cxx.

◆ GetFont() [3/4]

TGFont * TGFontPool::GetFont ( FontStruct_t  font)

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

Definition at line 1655 of file TGFont.cxx.

◆ GetFont() [4/4]

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 1681 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 2258 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 2340 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 2551 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 1770 of file TGFont.cxx.

◆ MakeFont()

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

Helper for GetNativeFont() and GetFontFromAttributes().

Creates and intializes 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 2576 of file TGFont.cxx.

◆ NameOfFont()

const char * TGFontPool::NameOfFont ( TGFont font)

Given a font, return a textual string identifying it.

Definition at line 2246 of file TGFont.cxx.

◆ operator=()

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

◆ 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 1947 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 2038 of file TGFont.cxx.

◆ Print()

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

List all fonts in the pool.

Reimplemented from TObject.

Definition at line 1861 of file TGFont.cxx.

Member Data Documentation

◆ fList

THashTable* TGFontPool::fList
private

Definition at line 229 of file TGFont.h.

◆ fNamedTable

THashTable* TGFontPool::fNamedTable
private

Definition at line 231 of file TGFont.h.

◆ fUidTable

THashTable* TGFontPool::fUidTable
private

Definition at line 230 of file TGFont.h.

Libraries for TGFontPool:
[legend]

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