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Reference Guide
TGXYLayoutHints Class Reference

This layout hint must be used for the TGXYLayout manager!

Example how to use this layout manager:

: TGMainFrame(gClient->GetRoot(), 30, 12)
// frame is 30 character long and 12 character heigh
SetLayoutManager(new TGXYLayout(this));
// create a button of size 8 X 1.8 at position 20 / 1
TGTextButton * button;
button = new TGTextButton(this, "&Apply", 1);
AddFrame(button, new TGXYLayoutHints(20, 1, 8, 1.8));
// create a listbox of size 18 X 10 at position 1 / 1.
// The height will increase if the frame height increases
TGListBox * listBox;
listBox = new TGListBox(this, 2);
AddFrame(listBox, new TGXYLayoutHints(1, 1, 18, 10,
#define gClient
Definition: TGClient.h:157
A listbox is a box, possibly with scrollbar, containing entries.
Definition: TGListBox.h:221
Defines top level windows that interact with the system Window Manager.
Definition: TGFrame.h:398
Yield an action as soon as it is clicked.
Definition: TGButton.h:142
This layout hint must be used for the TGXYLayout manager!
Definition: TGXYLayout.h:19
Is a layout manager where the position and the size of each widget in the frame are defined by X / Y ...
Definition: TGXYLayout.h:58

Normally there is one layout hint per widget. Therefore these can be deleted like in the following example in the destructor of the frame:

// Destructor, deletes all frames and their layout hints.
// delete all frames and layout hints
if (fList) {
TIter next(fList);
while ((ptr = (TGFrameElement *) next())) {
if (ptr->fLayout)
delete ptr->fLayout;
if (ptr->fFrame)
delete ptr->fFrame;
TGLayoutHints * fLayout
Definition: TGLayout.h:114
TGFrame * fFrame
Definition: TGLayout.h:112

Definition at line 19 of file TGXYLayout.h.

Public Types

enum  ERubberFlag { kLRubberX = BIT(0) , kLRubberY = BIT(1) , kLRubberW = BIT(2) , kLRubberH = BIT(3) }
- 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)
- Public Types inherited from TRefCnt
enum  EReferenceFlag { kStaticInit }

Public Member Functions

 TGXYLayoutHints (Double_t x, Double_t y, Double_t w, Double_t h, UInt_t rubberFlag=kLRubberX|kLRubberY)
 Constructor. More...
UInt_t GetFlag () const
Double_t GetH () const
Double_t GetW () const
Double_t GetX () const
Double_t GetY () const
virtual void SavePrimitive (std::ostream &out, Option_t *="")
 Save XY layout hints as a C++ statement(s) on output stream. More...
void SetFlag (UInt_t flag)
void SetH (Double_t h)
void SetW (Double_t w)
void SetX (Double_t x)
void SetY (Double_t y)
- Public Member Functions inherited from TGLayoutHints
 TGLayoutHints (const TGLayoutHints &lh)
 Constructor. More...
 TGLayoutHints (ULong_t hints=kLHintsNormal, Int_t padleft=0, Int_t padright=0, Int_t padtop=0, Int_t padbottom=0)
virtual ~TGLayoutHints ()
 Destructor. More...
ULong_t GetLayoutHints () const
Int_t GetPadBottom () const
Int_t GetPadLeft () const
Int_t GetPadRight () const
Int_t GetPadTop () const
void ls (Option_t *option="") const
 The ls function lists the contents of a class on stdout. More...
void Print (Option_t *option="") const
 Printing. More...
virtual void SetLayoutHints (ULong_t lh)
virtual void SetPadBottom (Int_t v)
virtual void SetPadLeft (Int_t v)
virtual void SetPadRight (Int_t v)
virtual void SetPadTop (Int_t v)
- 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...
virtual ULong_t Hash () const
 Return hash value for this object. 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 IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
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
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 SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename. More...
void SetBit (UInt_t f)
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. More...
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...
- Public Member Functions inherited from TRefCnt
 TRefCnt (EReferenceFlag)
 Leave fRefs alone. More...
 TRefCnt (Int_t initRef=0)
virtual ~TRefCnt ()
void AddReference ()
UInt_t References () const
UInt_t RemoveReference ()
void SetRefCount (UInt_t r)

Protected Attributes

UInt_t fFlag
 rubber flag More...
Double_t fH
 height of widget More...
Double_t fW
 width of widget More...
Double_t fX
 x - position of widget More...
Double_t fY
 y - position of widget More...
- Protected Attributes inherited from TGLayoutHints
ULong_t fLayoutHints
Int_t fPadbottom
Int_t fPadleft
Int_t fPadright
Int_t fPadtop
- Protected Attributes inherited from TRefCnt
UInt_t fRefs

Additional Inherited Members

- Static Public Member Functions inherited from TObject
static Longptr_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 Types inherited from TObject
enum  { kOnlyPrepStep = BIT(3) }
- Protected Member Functions inherited from TGLayoutHints
void UpdateFrameElements (TGLayoutHints *l)
 Update layout hints of frame elements. More...
- 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 ()

#include <TGXYLayout.h>

Inheritance diagram for TGXYLayoutHints:

Member Enumeration Documentation

◆ ERubberFlag


Definition at line 30 of file TGXYLayout.h.

Constructor & Destructor Documentation

◆ TGXYLayoutHints()

TGXYLayoutHints::TGXYLayoutHints ( Double_t  x,
Double_t  y,
Double_t  w,
Double_t  h,
UInt_t  rubberFlag = kLRubberX | kLRubberY 


The x, y, w and h define the position of the widget in its frame and the size of the widget. The unit is the size of a character. The rubberFlag defines how to move and to resize the widget when the frame is resized. Default is moving the X and Y position but keep the size of the widget.

Definition at line 125 of file TGXYLayout.cxx.

Member Function Documentation

◆ GetFlag()

UInt_t TGXYLayoutHints::GetFlag ( ) const

Definition at line 44 of file TGXYLayout.h.

◆ GetH()

Double_t TGXYLayoutHints::GetH ( ) const

Definition at line 43 of file TGXYLayout.h.

◆ GetW()

Double_t TGXYLayoutHints::GetW ( ) const

Definition at line 42 of file TGXYLayout.h.

◆ GetX()

Double_t TGXYLayoutHints::GetX ( ) const

Definition at line 40 of file TGXYLayout.h.

◆ GetY()

Double_t TGXYLayoutHints::GetY ( ) const

Definition at line 41 of file TGXYLayout.h.

◆ SavePrimitive()

void TGXYLayoutHints::SavePrimitive ( std::ostream &  out,
Option_t = "" 

Save XY layout hints as a C++ statement(s) on output stream.

Reimplemented from TGLayoutHints.

Definition at line 139 of file TGXYLayout.cxx.

◆ SetFlag()

void TGXYLayoutHints::SetFlag ( UInt_t  flag)

Definition at line 50 of file TGXYLayout.h.

◆ SetH()

void TGXYLayoutHints::SetH ( Double_t  h)

Definition at line 49 of file TGXYLayout.h.

◆ SetW()

void TGXYLayoutHints::SetW ( Double_t  w)

Definition at line 48 of file TGXYLayout.h.

◆ SetX()

void TGXYLayoutHints::SetX ( Double_t  x)

Definition at line 46 of file TGXYLayout.h.

◆ SetY()

void TGXYLayoutHints::SetY ( Double_t  y)

Definition at line 47 of file TGXYLayout.h.

Member Data Documentation

◆ fFlag

UInt_t TGXYLayoutHints::fFlag

rubber flag

Definition at line 26 of file TGXYLayout.h.

◆ fH

Double_t TGXYLayoutHints::fH

height of widget

Definition at line 25 of file TGXYLayout.h.

◆ fW

Double_t TGXYLayoutHints::fW

width of widget

Definition at line 24 of file TGXYLayout.h.

◆ fX

Double_t TGXYLayoutHints::fX

x - position of widget

Definition at line 22 of file TGXYLayout.h.

◆ fY

Double_t TGXYLayoutHints::fY

y - position of widget

Definition at line 23 of file TGXYLayout.h.

Libraries for TGXYLayoutHints:

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