A frame containing two scrollbars (a horizontal and a vertical) and a viewport.

The viewport acts as the window through which we look at the contents of the container frame.

Definition at line 192 of file TGCanvas.h.

Public Types
enum	{ kCanvasNoScroll = 0 , kCanvasScrollHorizontal = (1ULL << ( 0 )) , kCanvasScrollVertical = (1ULL << ( 1 )) , kCanvasScrollBoth = (kCanvasScrollHorizontal \| kCanvasScrollVertical) }

Public Types inherited from TGWindow
enum	EEditMode { kEditEnable = 0 , kEditDisable = (1ULL << ( 0 )) , kEditDisableEvents = (1ULL << ( 1 )) , kEditDisableGrab = (1ULL << ( 2 )) , kEditDisableLayout = (1ULL << ( 3 )) , kEditDisableResize = (1ULL << ( 4 )) , kEditDisableHeight = (1ULL << ( 5 )) , kEditDisableWidth = (1ULL << ( 6 )) , kEditDisableBtnEnable = (1ULL << ( 7 )) , kEditDisableKeyEnable = (1ULL << ( 8 )) }

enum	EStatusBits { kIsHtmlView = (1ULL << ( 14 )) }

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 )) }

Public Member Functions
	TGCanvas (const TGWindow *p=nullptr, UInt_t w=1, UInt_t h=1, UInt_t options=kSunkenFrame\|kDoubleBorder, Pixel_t back=GetDefaultFrameBackground())
	Create a canvas object.

virtual	~TGCanvas ()
	Delete canvas.

virtual void	AddFrame (TGFrame f, TGLayoutHints l=nullptr)
	Adding a frame to a canvas is actually adding the frame to the viewport container.

virtual void	ClearViewPort ()
	Clear view port and redraw content.

void	DrawBorder () override
	Draw canvas border.

TGFrame *	GetContainer () const

TGDimension	GetDefaultSize () const override
	std::cout << fWidth << "x" << fHeight << std::endl;

virtual Int_t	GetHsbPosition () const
	Get position of horizontal scrollbar.

TGHScrollBar *	GetHScrollbar () const

Int_t	GetScrolling () const

TGViewPort *	GetViewPort () const

virtual Int_t	GetVsbPosition () const
	Get position of vertical scrollbar.

TGVScrollBar *	GetVScrollbar () const

TClass *	IsA () const override

void	Layout () override
	Create layout for canvas.

void	MapSubwindows () override
	Map all canvas sub windows.

Bool_t	ProcessMessage (Longptr_t msg, Longptr_t parm1, Longptr_t parm2) override
	Handle message generated by the canvas scrollbars.

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

virtual void	SetContainer (TGFrame *f)

virtual void	SetHsbPosition (Int_t newPos)
	Set position of horizontal scrollbar.

void	SetScrolling (Int_t scrolling)
	Set scrolling policy.

virtual void	SetVsbPosition (Int_t newPos)
	Set position of vertical scrollbar.

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

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TGFrame
	TGFrame (const TGWindow *p=nullptr, UInt_t w=1, UInt_t h=1, UInt_t options=0, Pixel_t back=GetDefaultFrameBackground())
	Create a TGFrame object. Options is an OR of the EFrameTypes.

	TGFrame (TGClient c, Window_t id, const TGWindow parent=nullptr)
	Create a frame using an externally created window.

virtual	~TGFrame ()
	Destructor.

virtual void	Activate (Bool_t)

void	AddInput (UInt_t emask)
	Add events specified in the emask to the events the frame should handle.

virtual void	ChangeBackground (Pixel_t back)
	Change frame background color.

virtual void	ChangeOptions (UInt_t options)
	Change frame options. Options is an OR of the EFrameTypes.

Bool_t	Contains (Int_t x, Int_t y) const

void	Delete (Option_t *="") override
	Delete this object.

virtual void	DeleteWindow ()
	Delete window.

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

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

virtual void	DrawCopy (Handle_t, Int_t, Int_t)

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

virtual Pixel_t	GetBackground () const

Int_t	GetBorderWidth () const

virtual UInt_t	GetDefaultHeight () const

virtual UInt_t	GetDefaultWidth () const

virtual TDNDData *	GetDNDData (Atom_t)

virtual Int_t	GetDragType () const
	Returns drag source type.

virtual Int_t	GetDropType () const
	Returns drop target type.

UInt_t	GetEventMask () const

virtual Pixel_t	GetForeground () const
	Return frame foreground color.

TGFrameElement *	GetFrameElement () const

virtual TGFrame *	GetFrameFromPoint (Int_t x, Int_t y)

UInt_t	GetHeight () const

UInt_t	GetMaxHeight () const

UInt_t	GetMaxWidth () const

UInt_t	GetMinHeight () const

UInt_t	GetMinWidth () const

virtual UInt_t	GetOptions () const

TGDimension	GetSize () const

UInt_t	GetWidth () const

Int_t	GetX () const

Int_t	GetY () const

virtual Bool_t	HandleButton (Event_t *)

virtual Bool_t	HandleClientMessage (Event_t *event)
	Handle a client message.

virtual Bool_t	HandleColormapChange (Event_t *)

virtual Bool_t	HandleConfigureNotify (Event_t *event)
	This event is generated when the frame is resized.

virtual Bool_t	HandleCrossing (Event_t *)

virtual Bool_t	HandleDNDDrop (TDNDData *)

virtual Atom_t	HandleDNDEnter (Atom_t *)

virtual Bool_t	HandleDNDFinished ()

virtual Bool_t	HandleDNDLeave ()

virtual Atom_t	HandleDNDPosition (Int_t, Int_t, Atom_t, Int_t, Int_t)

virtual Bool_t	HandleDoubleClick (Event_t *)

virtual Bool_t	HandleDragDrop (TGFrame , Int_t, Int_t, TGLayoutHints )

virtual Bool_t	HandleDragEnter (TGFrame *)

virtual Bool_t	HandleDragLeave (TGFrame *)

virtual Bool_t	HandleDragMotion (TGFrame *)

Bool_t	HandleEvent (Event_t *event) override
	Handle all frame events.

virtual Bool_t	HandleFocusChange (Event_t *)

virtual Bool_t	HandleKey (Event_t *)

virtual Bool_t	HandleMotion (Event_t *)

virtual Bool_t	HandleSelection (Event_t *)

virtual Bool_t	HandleSelectionClear (Event_t *)

virtual Bool_t	HandleSelectionRequest (Event_t *)

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

TClass *	IsA () const override

virtual Bool_t	IsActive () const

virtual Bool_t	IsComposite () const

Bool_t	IsDNDSource () const

Bool_t	IsDNDTarget () const

Bool_t	IsEditable () const override

virtual Bool_t	IsLayoutBroken () const

void	MapRaised () override
	map raised

void	MapSubwindows () override
	map sub windows

void	MapWindow () override
	map window

void	Move (Int_t x, Int_t y) override
	Move frame.

void	MoveResize (Int_t x, Int_t y, UInt_t w=0, UInt_t h=0) override
	Move and/or resize the frame.

void	Print (Option_t *option="") const override
	Print window id.

virtual void	ProcessedConfigure (Event_t *event)

virtual void	ProcessedEvent (Event_t *event)

virtual void	ReallyDelete ()

void	RemoveInput (UInt_t emask)
	Remove events specified in emask from the events the frame should handle.

void	ReparentWindow (const TGWindow *p, Int_t x=0, Int_t y=0) override
	Reparent window, make p the new parent and position the window at position (x,y) in new parent.

virtual void	Resize (TGDimension size)
	Resize the frame.

void	Resize (UInt_t w=0, UInt_t h=0) override
	Resize the frame.

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

void	SaveUserColor (std::ostream &out, Option_t *)
	Save a user color in a C++ macro file - used in SavePrimitive().

virtual void	SendMessage (const TGWindow *w, Longptr_t msg, Longptr_t parm1, Longptr_t parm2)
	Send message (i.e.

void	SetBackgroundColor (Pixel_t back) override
	Set background color (override from TGWindow base class).

virtual void	SetCleanup (Int_t=kLocalCleanup)

void	SetDNDSource (Bool_t onoff)

void	SetDNDTarget (Bool_t onoff)

virtual void	SetDragType (Int_t type)
	SetDragType.

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

virtual void	SetDropType (Int_t type)
	SetDropType.

void	SetEditable (Bool_t) override

virtual void	SetForegroundColor (Pixel_t)

void	SetFrameElement (TGFrameElement *fe)

virtual void	SetHeight (UInt_t h)

virtual void	SetLayoutBroken (Bool_t=kTRUE)

virtual void	SetMaxHeight (UInt_t h)

virtual void	SetMaxWidth (UInt_t w)

virtual void	SetMinHeight (UInt_t h)

virtual void	SetMinWidth (UInt_t w)

virtual void	SetSize (const TGDimension &s)

virtual void	SetWidth (UInt_t w)

virtual void	SetX (Int_t x)

virtual void	SetY (Int_t y)

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

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

void	UnmapWindow () override
	unmap window

Public Member Functions inherited from TGWindow
	TGWindow (const TGWindow p=nullptr, Int_t x=0, Int_t y=0, UInt_t w=0, UInt_t h=0, UInt_t border=0, Int_t depth=0, UInt_t clss=0, void visual=nullptr, SetWindowAttributes_t *attr=nullptr, UInt_t wtype=0)
	Create a new window.

	TGWindow (TGClient c, Window_t id, const TGWindow parent=nullptr)
	Create a copy of a window.

virtual	~TGWindow ()
	Window destructor. Unregisters the window.

virtual void	DestroySubwindows ()
	destroy sub windows

virtual void	DestroyWindow ()
	destroy window

virtual UInt_t	GetEditDisabled () const

virtual const TGWindow *	GetMainFrame () const
	Returns top level main frame.

const char *	GetName () const override
	Return unique name, used in SavePrimitive methods.

const TGWindow *	GetParent () const

virtual Bool_t	HandleExpose (Event_t *event)

virtual Bool_t	HandleIdleEvent (TGIdleHandler *)

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

virtual void	IconifyWindow ()
	iconify window

TClass *	IsA () const override

virtual Bool_t	IsMapped ()
	Returns kTRUE if window is mapped on screen, kFALSE otherwise.

virtual Bool_t	IsMapSubwindows () const

virtual void	LowerWindow ()
	lower window

virtual Int_t	MustCleanup () const

void	Print (Option_t *option="") const override
	Print window id.

virtual void	RaiseWindow ()
	raise window

virtual void	RequestFocus ()
	request focus

virtual void	SetBackgroundPixmap (Pixmap_t pixmap)
	set background pixmap

virtual void	SetEditDisabled (UInt_t on=kEditDisable)

virtual void	SetMapSubwindows (Bool_t)

virtual void	SetName (const char *name)

virtual void	SetWindowName (const char *name=nullptr)
	Set window name.

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)

virtual	~TGObject ()
	TGObject destructor.

TGClient *	GetClient () const

Handle_t	GetId () const

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

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

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

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.

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.

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)
	Operator delete [].

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)

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	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.

Public Member Functions inherited from TQObject
	TQObject ()
	TQObject Constructor.

virtual	~TQObject ()
	TQObject Destructor.

Bool_t	AreSignalsBlocked () const

Bool_t	BlockSignals (Bool_t b)

virtual void	ChangedBy (const char *method)

void	CollectClassSignalLists (TList &list, TClass *cls)
	Collect class signal lists from class cls and all its base-classes.

Bool_t	Connect (const char signal, const char receiver_class, void receiver, const char slot)
	Non-static method is used to connect from the signal of this object to the receiver slot.

virtual void	Connected (const char *)

virtual void	Destroyed ()

Bool_t	Disconnect (const char signal=nullptr, void receiver=nullptr, const char *slot=nullptr)
	Disconnects signal of this object from slot of receiver.

virtual void	Disconnected (const char *)

void	Emit (const char *signal)
	Activate signal without args.

template<typename T >
void	Emit (const char *signal, const T &arg)
	Activate signal with single parameter.

template<typename... T>
void	EmitVA (const char *signal_name, Int_t, const T &... params)
	Emit a signal with a varying number of arguments.

TList *	GetListOfClassSignals () const
	Returns pointer to list of signals of this class.

TList *	GetListOfConnections () const

TList *	GetListOfSignals () const

virtual Bool_t	HasConnection (const char *signal_name) const
	Return true if there is any object connected to this signal.

virtual void	HighPriority (const char signal_name, const char slot_name=nullptr)

virtual void	LowPriority (const char signal_name, const char slot_name=nullptr)

virtual void	Message (const char *msg)

virtual Int_t	NumberOfConnections () const
	Return number of connections for this object.

virtual Int_t	NumberOfSignals () const
	Return number of signals for this object.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

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 TGFrame
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static const TGGC &	GetBckgndGC ()
	Get background color graphics context.

static const TGGC &	GetBlackGC ()
	Get black graphics context.

static Pixel_t	GetBlackPixel ()
	Get black pixel value.

static Pixel_t	GetDefaultFrameBackground ()
	Get default frame background.

static Pixel_t	GetDefaultSelectedBackground ()
	Get default selected frame background.

static const TGGC &	GetHilightGC ()
	Get highlight color graphics context.

static const TGGC &	GetShadowGC ()
	Get shadow color graphics context.

static const TGGC &	GetWhiteGC ()
	Get white graphics context.

static Pixel_t	GetWhitePixel ()
	Get white pixel value.

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

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static Int_t	GetCounter ()
	Return global window counter (total number of created windows).

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.

Static Public Member Functions inherited from TQObject
static Bool_t	AreAllSignalsBlocked ()
	Returns true if all signals are blocked.

static Bool_t	BlockAllSignals (Bool_t b)
	Block or unblock all signals. Returns the previous block status.

static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static Bool_t	Connect (const char sender_class, const char signal, const char receiver_class, void receiver, const char *slot)
	This method allows to make a connection from any object of the same class to a single slot.

static Bool_t	Connect (TQObject sender, const char signal, const char receiver_class, void receiver, const char *slot)
	Create connection between sender and receiver.

static const char *	DeclFileName ()

static Bool_t	Disconnect (const char class_name, const char signal, void receiver=nullptr, const char slot=nullptr)
	Disconnects "class signal".

static Bool_t	Disconnect (TQObject sender, const char signal=nullptr, void receiver=nullptr, const char slot=nullptr)
	Disconnects signal in object sender from slot_method in object receiver.

Protected Attributes
TGHScrollBar *	fHScrollbar
	horizontal scrollbar

Int_t	fScrolling
	flag which scrolling modes are allowed

TGViewPort *	fVport
	viewport through which we look at contents

TGVScrollBar *	fVScrollbar
	vertical scrollbar

Protected Attributes inherited from TGFrame
Pixel_t	fBackground
	frame background color

Int_t	fBorderWidth
	frame border width

Int_t	fDNDState
	EDNDFlags.

UInt_t	fEventMask
	currently active event mask

TGFrameElement *	fFE
	pointer to frame element

UInt_t	fHeight
	frame height

UInt_t	fMaxHeight
	maximal frame height

UInt_t	fMaxWidth
	maximal frame width

UInt_t	fMinHeight
	minimal frame height

UInt_t	fMinWidth
	minimal frame width

UInt_t	fOptions
	frame options

UInt_t	fWidth
	frame width

Int_t	fX
	frame x position

Int_t	fY
	frame y position

Protected Attributes inherited from TGWindow
UInt_t	fEditDisabled
	flags used for "guibuilding"

TString	fName
	name of the window used in SavePrimitive()

Bool_t	fNeedRedraw
	kTRUE if window needs to be redrawn

const TGWindow *	fParent
	Parent window.

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

Handle_t	fId
	X11/Win32 Window identifier.

Protected Attributes inherited from TQObject
TList *	fListOfConnections
	list of signals from this object

TList *	fListOfSignals

Bool_t	fSignalsBlocked
	list of connections to this object

Private Member Functions
	TGCanvas (const TGCanvas &)=delete

TGCanvas &	operator= (const TGCanvas &)=delete

Additional Inherited Members
Protected Types inherited from TGFrame
enum	{ kDeleteWindowCalled = (1ULL << ( 15 )) }

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

Protected Member Functions inherited from TGFrame
void	DoRedraw () override
	Redraw the frame.

virtual void	Draw3dRectangle (UInt_t type, Int_t x, Int_t y, UInt_t w, UInt_t h)
	Draw 3D rectangle on the frame border.

TString	GetOptionString () const
	Returns a frame option string - used in SavePrimitive().

const TGResourcePool *	GetResourcePool () const

void *	GetSender () override

virtual void	StartGuiBuilding (Bool_t on=kTRUE)
	Go into GUI building mode.

Protected Member Functions inherited from TGWindow
	TGWindow (const TGWindow &tgw)

	TGWindow (Window_t id)

TGWindow &	operator= (const TGWindow &tgw)

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 ()

Protected Member Functions inherited from TQObject
virtual const char *	GetSenderClassName () const

Static Protected Member Functions inherited from TGFrame
static Time_t	GetLastClick ()
	Get time of last mouse click.

Static Protected Member Functions inherited from TQObject
static Int_t	CheckConnectArgs (TQObject sender, TClass sender_class, const char signal, TClass receiver_class, const char *slot)
	Checking of consistency of sender/receiver methods/arguments.

static TString	CompressName (const char *method_name)
	Removes "const" words and blanks from full (with prototype) method name and resolve any typedefs in the method signature.

static Bool_t	ConnectToClass (const char sender_class, const char signal, TClass receiver_class, void receiver, const char *slot)
	This method allows to make connection from any object of the same class to the receiver object.

static Bool_t	ConnectToClass (TQObject sender, const char signal, TClass receiver_class, void receiver, const char *slot)
	Create connection between sender and receiver.

Static Protected Attributes inherited from TGFrame
static const TGGC *	fgBckgndGC = nullptr

static const TGGC *	fgBlackGC = nullptr

static Pixel_t	fgBlackPixel = 0

static Window_t	fgDbw = 0

static Int_t	fgDbx = 0

static Int_t	fgDby = 0

static Pixel_t	fgDefaultFrameBackground = 0

static Pixel_t	fgDefaultSelectedBackground = 0

static const TGGC *	fgHilightGC = nullptr

static Bool_t	fgInit = kFALSE

static UInt_t	fgLastButton = 0

static Time_t	fgLastClick = 0

static const TGGC *	fgShadowGC = nullptr

static UInt_t	fgUserColor = 0

static const TGGC *	fgWhiteGC = nullptr

static Pixel_t	fgWhitePixel = 0

Static Protected Attributes inherited from TGWindow
static Int_t	fgCounter = 0
	counter of created windows in SavePrimitive

Static Protected Attributes inherited from TQObject
static Bool_t	fgAllSignalsBlocked = kFALSE
	flag used for suppression of signals

#include <TGCanvas.h>

Inheritance diagram for TGCanvas:

[legend]

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
kCanvasNoScroll
kCanvasScrollHorizontal
kCanvasScrollVertical
kCanvasScrollBoth

Definition at line 205 of file TGCanvas.h.

Constructor & Destructor Documentation

◆ TGCanvas() [1/2]

TGCanvas::TGCanvas ( const TGCanvas & )

privatedelete

◆ TGCanvas() [2/2]

TGCanvas::TGCanvas	(	const TGWindow *	p = `nullptr`,
		UInt_t	w = `1`,
		UInt_t	h = `1`,
		UInt_t	options = `kSunkenFrame \| kDoubleBorder`,
		Pixel_t	back = `GetDefaultFrameBackground()`
	)

Create a canvas object.

Definition at line 2130 of file TGCanvas.cxx.

◆ ~TGCanvas()

TGCanvas::~TGCanvas ( )

virtual

Delete canvas.

Definition at line 2155 of file TGCanvas.cxx.

Member Function Documentation

◆ AddFrame()

void TGCanvas::AddFrame	(	TGFrame *	f,
		TGLayoutHints *	l = `nullptr`
	)

virtual

Adding a frame to a canvas is actually adding the frame to the viewport container.

The viewport container must be at least a TGCompositeFrame for this method to succeed.

Definition at line 2188 of file TGCanvas.cxx.

◆ Class()

static TClass * TGCanvas::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TGCanvas::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TGCanvas::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 239 of file TGCanvas.h.

◆ ClearViewPort()

void TGCanvas::ClearViewPort ( )

virtual

Clear view port and redraw content.

Definition at line 2434 of file TGCanvas.cxx.

◆ DeclFileName()

static const char * TGCanvas::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 239 of file TGCanvas.h.

◆ DrawBorder()

void TGCanvas::DrawBorder ( )

overridevirtual

Draw canvas border.

Reimplemented from TGFrame.

Definition at line 2204 of file TGCanvas.cxx.

◆ GetContainer()

TGFrame * TGCanvas::GetContainer ( ) const

inline

Definition at line 216 of file TGCanvas.h.

◆ GetDefaultSize()

TGDimension TGCanvas::GetDefaultSize ( ) const

inlineoverridevirtual

std::cout << fWidth << "x" << fHeight << std::endl;

Reimplemented from TGFrame.

Definition at line 234 of file TGCanvas.h.

◆ GetHsbPosition()

Int_t TGCanvas::GetHsbPosition ( ) const

virtual

Get position of horizontal scrollbar.

Definition at line 2374 of file TGCanvas.cxx.

◆ GetHScrollbar()

TGHScrollBar * TGCanvas::GetHScrollbar ( ) const

inline

Definition at line 218 of file TGCanvas.h.

◆ GetScrolling()

Int_t TGCanvas::GetScrolling ( ) const

inline

Definition at line 232 of file TGCanvas.h.

◆ GetViewPort()

TGViewPort * TGCanvas::GetViewPort ( ) const

inline

Definition at line 217 of file TGCanvas.h.

◆ GetVsbPosition()

Int_t TGCanvas::GetVsbPosition ( ) const

virtual

Get position of vertical scrollbar.

Definition at line 2384 of file TGCanvas.cxx.

◆ GetVScrollbar()

TGVScrollBar * TGCanvas::GetVScrollbar ( ) const

inline

Definition at line 219 of file TGCanvas.h.

◆ IsA()

TClass * TGCanvas::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TObject.

Reimplemented in TGListView, TGMdiMainFrame, and TRootEmbeddedCanvas.

Definition at line 239 of file TGCanvas.h.

◆ Layout()

void TGCanvas::Layout ( )

overridevirtual

Create layout for canvas.

Depending on the size of the container we need to add the scrollbars.

Reimplemented from TGFrame.

Reimplemented in TGListView, and TGMdiMainFrame.

Definition at line 2229 of file TGCanvas.cxx.

◆ MapSubwindows()

void TGCanvas::MapSubwindows ( )

overridevirtual

Map all canvas sub windows.

Reimplemented from TGWindow.

Definition at line 2165 of file TGCanvas.cxx.

◆ operator=()

TGCanvas & TGCanvas::operator= ( const TGCanvas & )

privatedelete

◆ ProcessMessage()

Bool_t TGCanvas::ProcessMessage	(	Longptr_t	msg,
		Longptr_t	parm1,
		Longptr_t	parm2
	)

overridevirtual

Handle message generated by the canvas scrollbars.

Reimplemented from TGFrame.

Reimplemented in TGListView, and TGMdiMainFrame.

Definition at line 2344 of file TGCanvas.cxx.

◆ SavePrimitive()

void TGCanvas::SavePrimitive	(	std::ostream &	out,
		Option_t *	option = `""`
	)

overridevirtual

Save a canvas widget as a C++ statement(s) on output stream out.

Reimplemented from TObject.

Reimplemented in TGListView, TGMdiMainFrame, and TRootEmbeddedCanvas.

Definition at line 2446 of file TGCanvas.cxx.

◆ SetContainer()

virtual void TGCanvas::SetContainer ( TGFrame * f )

inlinevirtual

Reimplemented in TGListView.

Definition at line 222 of file TGCanvas.h.

◆ SetHsbPosition()

void TGCanvas::SetHsbPosition ( Int_t newPos )

virtual

Set position of horizontal scrollbar.

Definition at line 2394 of file TGCanvas.cxx.

◆ SetScrolling()

void TGCanvas::SetScrolling ( Int_t scrolling )

Set scrolling policy.

Use values defined by the enum: kCanvasNoScroll, kCanvasScrollHorizontal, kCanvasScrollVertical, kCanvasScrollBoth.

Definition at line 2423 of file TGCanvas.cxx.

◆ SetVsbPosition()

void TGCanvas::SetVsbPosition ( Int_t newPos )

virtual

Set position of vertical scrollbar.

Definition at line 2408 of file TGCanvas.cxx.

◆ Streamer()

void TGCanvas::Streamer ( TBuffer & R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from TObject.

Reimplemented in TGListView, TGMdiMainFrame, and TRootEmbeddedCanvas.

◆ StreamerNVirtual()

void TGCanvas::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 239 of file TGCanvas.h.

Member Data Documentation

◆ fHScrollbar

TGHScrollBar* TGCanvas::fHScrollbar

protected

horizontal scrollbar

Definition at line 196 of file TGCanvas.h.

◆ fScrolling

Int_t TGCanvas::fScrolling

protected

flag which scrolling modes are allowed

Definition at line 198 of file TGCanvas.h.

◆ fVport

TGViewPort* TGCanvas::fVport

protected

viewport through which we look at contents

Definition at line 195 of file TGCanvas.h.

◆ fVScrollbar

TGVScrollBar* TGCanvas::fVScrollbar

protected

vertical scrollbar

Definition at line 197 of file TGCanvas.h.

Libraries for TGCanvas:

[legend]

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

gui/gui/inc/TGCanvas.h
gui/gui/src/TGCanvas.cxx

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ TGCanvas() [1/2]

◆ TGCanvas() [2/2]

◆ ~TGCanvas()

Member Function Documentation

◆ AddFrame()

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ ClearViewPort()

◆ DeclFileName()

◆ DrawBorder()

◆ GetContainer()

◆ GetDefaultSize()

◆ GetHsbPosition()

◆ GetHScrollbar()

◆ GetScrolling()

◆ GetViewPort()

◆ GetVsbPosition()

◆ GetVScrollbar()

◆ IsA()

◆ Layout()

◆ MapSubwindows()

◆ operator=()

◆ ProcessMessage()

◆ SavePrimitive()

◆ SetContainer()

◆ SetHsbPosition()

◆ SetScrolling()

◆ SetVsbPosition()

◆ Streamer()

◆ StreamerNVirtual()

Member Data Documentation

◆ fHScrollbar

◆ fScrolling

◆ fVport

◆ fVScrollbar