Public Member Functions | |
~TGFont () override | |
Delete font. | |
TGTextLayout * | ComputeTextLayout (const char *string, Int_t numChars, Int_t wrapLength, Int_t justify, Int_t flags, UInt_t *width, UInt_t *height) const |
Computes the amount of screen space needed to display a multi-line, justified string of text. | |
void | DrawChars (Drawable_t dst, GContext_t gc, const char *source, Int_t numChars, Int_t x, Int_t y) const |
Perform a quick sanity check to ensure we won't overflow the X coordinate space. | |
void | DrawCharsExp (Drawable_t dst, GContext_t gc, const char *source, Int_t numChars, Int_t x, Int_t y) const |
Draw a string of characters on the screen. | |
FontAttributes_t | GetFontAttributes () const |
FontH_t | GetFontHandle () const |
void | GetFontMetrics (FontMetrics_t *m) const |
Get font metrics. | |
FontStruct_t | GetFontStruct () const |
TClass * | IsA () const override |
Int_t | MeasureChars (const char *source, Int_t numChars, Int_t maxLength, Int_t flags, Int_t *length) const |
Determine the number of characters from the string that will fit in the given horizontal span. | |
FontStruct_t | operator() () const |
Not inline due to a bug in g++ 2.96 20000731 (Red Hat Linux 7.0) | |
Int_t | PostscriptFontName (TString *dst) const |
Return the name of the corresponding Postscript font for this TGFont. | |
void | Print (Option_t *option="") const override |
Print font info. | |
void | SavePrimitive (std::ostream &out, Option_t *="") override |
Save the used font as a C++ statement(s) on output stream out. | |
void | Streamer (TBuffer &) override |
Stream an object of class TObject. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
Int_t | TextHeight () const |
Int_t | TextWidth (const char *string, Int_t numChars=-1) const |
A wrapper function for the more complicated interface of MeasureChars. | |
void | UnderlineChars (Drawable_t dst, GContext_t gc, const char *string, Int_t x, Int_t y, Int_t firstChar, Int_t lastChar) const |
This procedure draws an underline for a given range of characters in a given string. | |
Int_t | XTextWidth (const char *string, Int_t numChars=-1) const |
Return text width in pixels. | |
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TNamed () | |
TNamed (const char *name, const char *title) | |
TNamed (const TNamed &named) | |
TNamed copy ctor. | |
TNamed (const TString &name, const TString &title) | |
virtual | ~TNamed () |
TNamed destructor. | |
void | Clear (Option_t *option="") override |
Set name and title to empty strings (""). | |
TObject * | Clone (const char *newname="") const override |
Make a clone of an object using the Streamer facility. | |
Int_t | Compare (const TObject *obj) const override |
Compare two TNamed objects. | |
void | Copy (TObject &named) const override |
Copy this to obj. | |
virtual void | FillBuffer (char *&buffer) |
Encode TNamed into output buffer. | |
const char * | GetName () const override |
Returns name of object. | |
const char * | GetTitle () const override |
Returns title of object. | |
ULong_t | Hash () const override |
Return hash value for this object. | |
TClass * | IsA () const override |
Bool_t | IsSortable () const override |
void | ls (Option_t *option="") const override |
List TNamed name and title. | |
TNamed & | operator= (const TNamed &rhs) |
TNamed assignment operator. | |
void | Print (Option_t *option="") const override |
Print TNamed name and title. | |
virtual void | SetName (const char *name) |
Set the name of the TNamed. | |
virtual void | SetNameTitle (const char *name, const char *title) |
Set all the TNamed parameters (name and title). | |
virtual void | SetTitle (const char *title="") |
Set the title of the TNamed. | |
virtual Int_t | Sizeof () const |
Return size of the TNamed part of the TObject. | |
void | Streamer (TBuffer &) override |
Stream an object of class TObject. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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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 | 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 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 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 | IsEqual (const TObject *obj) const |
Default equal comparison (objects are equal if they have the same address in memory). | |
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 |
R__ALWAYS_INLINE Bool_t | IsZombie () const |
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 | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. | |
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. | |
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TRefCnt (EReferenceFlag) | |
Leave fRefs alone. | |
TRefCnt (Int_t initRef=0) | |
virtual | ~TRefCnt () |
void | AddReference () |
UInt_t | References () const |
UInt_t | RemoveReference () |
void | SetRefCount (UInt_t r) |
Static Public Member Functions | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
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static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
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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 | |
TGFont (const char *name) | |
TGFont (const TGFont &)=delete | |
LayoutChunk_t * | NewChunk (TGTextLayout *layout, int *maxPtr, const char *start, int numChars, int curX, int newX, int y) const |
Helper function for ComputeTextLayout(). | |
void | operator= (const TGFont &)=delete |
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virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). | |
void | MakeZombie () |
Private Attributes | |
Int_t | fBarHeight |
Height of underline or overstrike bar (used for simulating a native underlined or strikeout font). | |
FontAttributes_t | fFA |
Actual font attributes obtained when the font was created. | |
FontMetrics_t | fFM |
Cached font metrics. | |
FontH_t | fFontH |
Font handle (derived from fontstruct) | |
FontStruct_t | fFontStruct |
Low level graphics fontstruct. | |
TObjString * | fNamedHash |
Pointer to the named object TGFont was based on. | |
Int_t | fTabWidth |
Width of tabs in this font (pixels). | |
char | fTypes [256] |
Array giving types of all characters in the font, used when displaying control characters. | |
Int_t | fUnderlineHeight |
Height of underline bar (used for drawing underlines on a non-underlined font). | |
Int_t | fUnderlinePos |
Offset from baseline to origin of underline bar (used for drawing underlines on a non-underlined font). | |
Int_t | fWidths [256] |
Array giving widths of all possible characters in the font. | |
Friends | |
class | TGFontPool |
class | TGTextLayout |
Additional Inherited Members | |
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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 )) } |
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enum | EReferenceFlag { kStaticInit } |
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enum | { kOnlyPrepStep = (1ULL << ( 3 )) } |
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TString | fName |
TString | fTitle |
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UInt_t | fRefs |
#include <TGFont.h>
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Delete font.
Definition at line 276 of file TGFont.cxx.
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TGTextLayout * TGFont::ComputeTextLayout | ( | const char * | string, |
Int_t | numChars, | ||
Int_t | wrapLength, | ||
Int_t | justify, | ||
Int_t | flags, | ||
UInt_t * | width, | ||
UInt_t * | height | ||
) | const |
Computes the amount of screen space needed to display a multi-line, justified string of text.
Records all the measurements that were done to determine to size and positioning of the individual lines of text; this information can be used by the TGTextLayout::DrawText() procedure to display the text quickly (without remeasuring it).
This procedure is useful for simple widgets that want to display single-font, multi-line text and want TGFont to handle the details.
The return value is a TGTextLayout token that holds the measurement information for the given string. The token is only valid for the given string. If the string is freed, the token is no longer valid and must also be deleted.
The dimensions of the screen area needed to display the text are stored in *width and *height.
string – String whose dimensions are to be computed. numChars – Number of characters to consider from string, or < 0 for strlen(). wrapLength – Longest permissible line length, in pixels. <= 0 means no automatic wrapping: just let lines get as long as needed. justify – How to justify lines. flags – Flag bits OR-ed together. kTextIgnoreTabs means that tab characters should not be expanded. kTextIgnoreNewlines means that newline characters should not cause a line break. width – Filled with width of string. height – Filled with height of string.
Definition at line 661 of file TGFont.cxx.
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void TGFont::DrawChars | ( | Drawable_t | dst, |
GContext_t | gc, | ||
const char * | source, | ||
Int_t | numChars, | ||
Int_t | x, | ||
Int_t | y | ||
) | const |
Perform a quick sanity check to ensure we won't overflow the X coordinate space.
Definition at line 1493 of file TGFont.cxx.
void TGFont::DrawCharsExp | ( | Drawable_t | dst, |
GContext_t | gc, | ||
const char * | source, | ||
Int_t | numChars, | ||
Int_t | x, | ||
Int_t | y | ||
) | const |
Draw a string of characters on the screen.
DrawCharsExp() expands control characters that occur in the string to \X or \xXX sequences. DrawChars() just draws the strings.
dst – Window or pixmap in which to draw. gc – Graphics context for drawing characters. source – Characters to be displayed. Need not be'\0' terminated. For DrawChars(), all meta-characters (tabs, control characters, and newlines) should be stripped out of the string that is passed to this function. If they are not stripped out, they will be displayed as regular printing characters. numChars – Number of characters in string. x, y – Coordinates at which to place origin of string when drawing.
Definition at line 1463 of file TGFont.cxx.
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void TGFont::GetFontMetrics | ( | FontMetrics_t * | m | ) | const |
Get font metrics.
Definition at line 286 of file TGFont.cxx.
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Int_t TGFont::MeasureChars | ( | const char * | source, |
Int_t | numChars, | ||
Int_t | maxLength, | ||
Int_t | flags, | ||
Int_t * | length | ||
) | const |
Determine the number of characters from the string that will fit in the given horizontal span.
The measurement is done under the assumption that DrawChars() will be used to actually display the characters.
The return value is the number of characters from source that fit into the span that extends from 0 to maxLength. *length is filled with the x-coordinate of the right edge of the last character that did fit.
source – Characters to be displayed. Need not be '\0' terminated. numChars – Maximum number of characters to consider from source string. maxLength – If > 0, maxLength specifies the longest permissible line length; don't consider any character that would cross this x-position. If <= 0, then line length is unbounded and the flags argument is ignored. flags – Various flag bits OR-ed together: TEXT_PARTIAL_OK means include the last char which only partially fit on this line. TEXT_WHOLE_WORDS means stop on a word boundary, if possible. TEXT_AT_LEAST_ONE means return at least one character even if no characters fit. *length – Filled with x-location just after the terminating character.
Definition at line 488 of file TGFont.cxx.
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Helper function for ComputeTextLayout().
Encapsulates a measured set of characters in a chunk that can be quickly drawn.
Returns a pointer to the new chunk in the text layout. The text layout is reallocated to hold more chunks as necessary.
Currently, ComputeTextLayout() stores contiguous ranges of "normal" characters in a chunk, along with individual tab and newline chars in their own chunks. All characters in the text layout are accounted for.
Definition at line 1410 of file TGFont.cxx.
FontStruct_t TGFont::operator() | ( | ) | const |
Not inline due to a bug in g++ 2.96 20000731 (Red Hat Linux 7.0)
Definition at line 300 of file TGFont.cxx.
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Return the name of the corresponding Postscript font for this TGFont.
The return value is the pointsize of the TGFont. The name of the Postscript font is appended to ds.
If the font does not exist on the printer, the print job will fail at print time. Given a "reasonable" Postscript printer, the following TGFont font families should print correctly:
Avant Garde, Arial, Bookman, Courier, Courier New, Geneva, Helvetica, Monaco, New Century Schoolbook, New York, Palatino, Symbol, Times, Times New Roman, Zapf Chancery, and Zapf Dingbats.
Any other TGFont font families may not print correctly because the computed Postscript font name may be incorrect.
dst – Pointer to an initialized TString object to which the name of the Postscript font that corresponds to the font will be appended.
Definition at line 343 of file TGFont.cxx.
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Save the used font as a C++ statement(s) on output stream out.
Reimplemented from TObject.
Definition at line 1884 of file TGFont.cxx.
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A wrapper function for the more complicated interface of MeasureChars.
Computes how much space the given simple string needs.
The return value is the width (in pixels) of the given string.
string – String whose width will be computed. numChars – Number of characters to consider from string, or < 0 for strlen().
Definition at line 575 of file TGFont.cxx.
void TGFont::UnderlineChars | ( | Drawable_t | dst, |
GContext_t | gc, | ||
const char * | string, | ||
Int_t | x, | ||
Int_t | y, | ||
Int_t | firstChar, | ||
Int_t | lastChar | ||
) | const |
This procedure draws an underline for a given range of characters in a given string.
It doesn't draw the characters (which are assumed to have been displayed previously); it just draws the underline. This procedure would mainly be used to quickly underline a few characters without having to construct an underlined font. To produce properly underlined text, the appropriate underlined font should be constructed and used.
dst – Window or pixmap in which to draw. gc – Graphics context for actually drawing line. string – String containing characters to be underlined or overstruck. x, y – Coordinates at which first character of string is drawn. firstChar – Index of first character. lastChar – Index of one after the last character.
Definition at line 617 of file TGFont.cxx.
Return text width in pixels.
Definition at line 590 of file TGFont.cxx.
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