TCanvas Class Reference

The Canvas class.

A Canvas is an area mapped to a window directly under the control of the display manager. A ROOT session may have several canvases open at any given time.

A Canvas may be subdivided into independent graphical areas: the Pads. A canvas has a default pad which has the name of the canvas itself. An example of a Canvas layout is sketched in the picture below.

This canvas contains two pads named P1 and P2. Both Canvas, P1 and P2 can be moved, grown, shrunk using the normal rules of the Display manager.

Once objects have been drawn in a canvas, they can be edited/moved by pointing directly to them. The cursor shape is changed to suggest the type of action that one can do on this object. Clicking with the right mouse button on an object pops-up a contextmenu with a complete list of actions possible on this object.

A graphical editor may be started from the canvas "View" menu under the menu entry "Toolbar".

An interactive HELP is available by clicking on the HELP button at the top right of the canvas. It gives a short explanation about the canvas' menus.

A canvas may be automatically divided into pads via TPad::Divide.

At creation time, no matter if in interactive or batch mode, the canvas size defines the size of the canvas window (including the size of the window manager's decoration). To define precisely the graphics area size of a canvas in the interactive mode, the following four lines of code should be used:

{
   Double_t w = 600;
   Double_t h = 600;
   auto c = new TCanvas("c", "c", w, h);
   c->SetWindowSize(w + (w - c->GetWw()), h + (h - c->GetWh()));
}

and in the batch mode simply do:

c->SetCanvasSize(w,h);

If the canvas size this exceed the window size, scroll bars will be added to the canvas This allows to display very large canvases (even bigger than the screen size). The Following example shows how to proceed.

{
   auto c = new TCanvas("c","c");
   c->SetCanvasSize(1500, 1500);
   c->SetWindowSize(500, 500);
}

Definition at line 23 of file TCanvas.h.

Public Types
enum	{   kShowEventStatus = BIT(15) , kAutoExec = BIT(16) , kMenuBar = BIT(17) , kShowToolBar = BIT(18) ,   kShowEditor = BIT(19) , kMoveOpaque = BIT(20) , kResizeOpaque = BIT(21) , kIsGrayscale = BIT(22) ,   kShowToolTips = BIT(23) }
Public Types inherited from TPad
enum	{   kFraming = BIT(6) , kHori = BIT(9) , kClipFrame = BIT(10) , kPrintingPS = BIT(11) ,   kCannotMove = BIT(12) , kClearAfterCR = BIT(14) }
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 Member Functions
	TCanvas (Bool_t build=kTRUE)
	Canvas default constructor.
	TCanvas (const char *name, const char *title, Int_t wtopx, Int_t wtopy, Int_t ww, Int_t wh)
	Create a new canvas.
	TCanvas (const char *name, const char *title, Int_t ww, Int_t wh)
	Create a new canvas at a random position.
	TCanvas (const char *name, const char *title="", Int_t form=1)
	Create a new canvas with a predefined size form.
	TCanvas (const char *name, Int_t ww, Int_t wh, Int_t winid)
	Create an embedded canvas, i.e.
virtual	~TCanvas ()
	Canvas destructor.
void	Browse (TBrowser *b) override
	Browse.
TVirtualPad *	cd (Int_t subpadnumber=0) override
	Set current canvas & pad.
void	Clear (Option_t *option="") override
	Remove all primitives from the canvas.
virtual void	Cleared (TVirtualPad *pad)
	Emit pad Cleared signal.
void	ClearPadSave ()
void	Close (Option_t *option="") override
	Close canvas.
void	Closed () override
	Emit Closed signal.
void	Constructor ()
	Canvas default constructor.
void	Constructor (const char *name, const char *title, Int_t form)
	Create a new canvas with a predefined size form.
void	Constructor (const char *name, const char *title, Int_t wtopx, Int_t wtopy, Int_t ww, Int_t wh)
	Create a new canvas.
void	Constructor (const char *name, const char *title, Int_t ww, Int_t wh)
	Create a new canvas at a random position.
void	Delete (Option_t *="") override
	Delete this object.
void	DeleteCanvasPainter ()
	assert on IsBatch() == false?
void	Destructor ()
	Actual canvas destructor.
void	DisconnectWidget ()
	Used by friend class TCanvasImp.
void	Draw (Option_t *option="") override
	Draw a canvas.
TObject *	DrawClone (Option_t *option="") const override
	Draw a clone of this canvas A new canvas is created that is a clone of this canvas.
virtual TObject *	DrawClonePad ()
	Draw a clone of this canvas into the current pad In an interactive session, select the destination/current pad with the middle mouse button, then point to the canvas area to select the canvas context menu item DrawClonePad.
virtual void	EditorBar ()
	Get editor bar.
void	EmbedInto (Int_t winid, Int_t ww, Int_t wh)
	Embedded a canvas into a TRootEmbeddedCanvas.
void	EnterLeave (TPad *prevSelPad, TObject *prevSelObj)
	Generate kMouseEnter and kMouseLeave events depending on the previously selected object and the currently selected object.
void	FeedbackMode (Bool_t set)
	Turn rubberband feedback mode on or off.
void	Flush ()
	Flush canvas buffers.
void	ForceUpdate ()
	Force canvas update.
Bool_t	GetAutoExec () const
Int_t	GetCanvasID () const override
TCanvasImp *	GetCanvasImp () const override
TVirtualPadPainter *	GetCanvasPainter ()
	Access and (probably) creation of pad painter.
virtual void	GetCanvasPar (Int_t &wtopx, Int_t &wtopy, UInt_t &ww, UInt_t &wh)
TObject *	GetClickSelected () const
TVirtualPad *	GetClickSelectedPad () const
TContextMenu *	GetContextMenu () const
const char *	GetDISPLAY () const
Int_t	GetDoubleBuffer () const
Int_t	GetEvent () const override
Int_t	GetEventX () const override
Int_t	GetEventY () const override
Color_t	GetHighLightColor () const override
TVirtualPad *	GetPadSave () const override
TObject *	GetSelected () const override
Option_t *	GetSelectedOpt () const
TVirtualPad *	GetSelectedPad () const override
Int_t	GetSelectedX () const
Int_t	GetSelectedY () const
Bool_t	GetShowEditor () const
Bool_t	GetShowEventStatus () const
Bool_t	GetShowToolBar () const
Bool_t	GetShowToolTips () const
UInt_t	GetWh () const override
UInt_t	GetWindowHeight () const
Int_t	GetWindowTopX ()
	Returns current top x position of window on screen.
Int_t	GetWindowTopY ()
	Returns current top y position of window on screen.
UInt_t	GetWindowWidth () const
UInt_t	GetWw () const override
Size_t	GetXsizeReal () const
Size_t	GetXsizeUser () const
Size_t	GetYsizeReal () const
Size_t	GetYsizeUser () const
virtual void	HandleInput (EEventType button, Int_t x, Int_t y)
	Handle Input Events.
Bool_t	HasMenuBar () const
virtual void	HighlightConnect (const char *slot)
	This is "simplification" for function TCanvas::Connect with Highlighted signal for specific slot.
virtual void	Highlighted (TVirtualPad *pad, TObject *obj, Int_t x, Int_t y)
	Emit Highlighted() signal.
void	Iconify ()
	Iconify canvas.
Bool_t	IsBatch () const override
Bool_t	IsDrawn ()
Bool_t	IsFolder () const override
	Is folder ?
Bool_t	IsGrayscale ()
	Check whether this canvas is to be drawn in grayscale mode.
Bool_t	IsRetained () const override
Bool_t	IsWeb () const
	Is web canvas.
void	ls (Option_t *option="") const override
	List all pads.
void	MoveOpaque (Int_t set=1)
	Set option to move objects/pads in a canvas.
Bool_t	OpaqueMoving () const override
Bool_t	OpaqueResizing () const override
void	Paint (Option_t *option="") override
	Paint canvas.
virtual TPad *	Pick (Int_t px, Int_t py, TObject *prevSelObj)
	Prepare for pick, call TPad::Pick() and when selected object is different from previous then emit Picked() signal.
TPad *	Pick (Int_t px, Int_t py, TObjLink *&pickobj) override
	Search for an object at pixel position px,py.
virtual void	Picked (TPad *selpad, TObject *selected, Int_t event)
	Emit Picked() signal.
virtual void	ProcessedEvent (Int_t event, Int_t x, Int_t y, TObject *selected)
	Emit ProcessedEvent() signal.
void	RaiseWindow ()
	Raise canvas window.
void	ResetDrawn ()
virtual void	Resize (Option_t *option="")
	Recompute canvas parameters following a X11 Resize.
void	ResizeOpaque (Int_t set=1)
	Set option to resize objects/pads in a canvas.
void	SavePrimitive (std::ostream &out, Option_t *option="") override
	Save primitives in this canvas in C++ macro file with GUI.
void	SaveSource (const char *filename="", Option_t *option="")
	Save primitives in this canvas as a C++ macro file.
virtual void	Selected (TVirtualPad *pad, TObject *obj, Int_t event)
	Emit Selected() signal.
void	SetBatch (Bool_t batch=kTRUE) override
	Toggle batch mode.
void	SetCanvasImp (TCanvasImp *i)
void	SetCanvasSize (UInt_t ww, UInt_t wh) override
	Set Width and Height of canvas to ww and wh respectively.
void	SetClickSelected (TObject *obj)
void	SetClickSelectedPad (TPad *pad)
void	SetCursor (ECursor cursor) override
	Set cursor.
void	SetDoubleBuffer (Int_t mode=1) override
	Set Double Buffer On/Off.
void	SetFixedAspectRatio (Bool_t fixed=kTRUE) override
	Fix canvas aspect ratio to current value if fixed is true.
void	SetGrayscale (Bool_t set=kTRUE)
	Set whether this canvas should be painted in grayscale, and re-paint it if necessary.
void	SetHighLightColor (Color_t col)
void	SetName (const char *name="") override
	Set canvas name. In case name is an empty string, a default name is set.
void	SetPadSave (TPad *pad)
bool	SetRealAspectRatio (const Int_t axis=1)
	Function to resize a canvas so that the plot inside is shown in real aspect ratio.
void	SetRetained (Bool_t retained=kTRUE)
void	SetSelected (TObject *obj) override
	Set selected canvas.
void	SetSelectedPad (TPad *pad)
void	SetSupportGL (Bool_t support)
void	SetTitle (const char *title="") override
	Set canvas title.
void	SetWindowPosition (Int_t x, Int_t y)
	Set canvas window position.
void	SetWindowSize (UInt_t ww, UInt_t wh)
	Set canvas window size.
void	Show ()
	Show canvas.
virtual void	Size (Float_t xsizeuser=0, Float_t ysizeuser=0)
	Set the canvas scale in centimeters.
virtual void	ToggleAutoExec ()
	Toggle pad auto execution of list of TExecs.
virtual void	ToggleEditor ()
	Toggle editor.
virtual void	ToggleEventStatus ()
	Toggle event statusbar.
virtual void	ToggleToolBar ()
	Toggle toolbar.
virtual void	ToggleToolTips ()
	Toggle tooltip display.
void	Update () override
	Update canvas pad buffers.
void	UseCurrentStyle () override
	Force a copy of current style for all objects in canvas.
Bool_t	UseGL () const
Public Member Functions inherited from TPad
	TPad ()
	Pad default constructor.
	TPad (const char *name, const char *title, Double_t xlow, Double_t ylow, Double_t xup, Double_t yup, Color_t color=-1, Short_t bordersize=-1, Short_t bordermode=-2)
	Pad constructor.
virtual	~TPad ()
	Pad destructor.
void	AbsCoordinates (Bool_t set) override
Double_t	AbsPixeltoX (Int_t px) override
virtual void	AbsPixeltoXY (Int_t xpixel, Int_t ypixel, Double_t &x, Double_t &y)
Double_t	AbsPixeltoY (Int_t py) override
void	AddExec (const char *name, const char *command) override
	Add a new TExec object to the list of Execs.
virtual void	AutoExec ()
	Execute the list of Execs when a pad event occurs.
void	Browse (TBrowser *b) override
	Browse pad.
TLegend *	BuildLegend (Double_t x1=0.3, Double_t y1=0.21, Double_t x2=0.3, Double_t y2=0.21, const char *title="", Option_t *option="") override
	Build a legend from the graphical objects in the pad.
TVirtualPad *	cd (Int_t subpadnumber=0) override
	Set Current pad.
void	Clear (Option_t *option="") override
	Delete all pad primitives.
Int_t	Clip (Double_t *x, Double_t *y, Double_t xclipl, Double_t yclipb, Double_t xclipr, Double_t yclipt) override
	Clipping routine: Cohen Sutherland algorithm.
virtual Int_t	Clip (Float_t *x, Float_t *y, Float_t xclipl, Float_t yclipb, Float_t xclipr, Float_t yclipt)
	Clipping routine: Cohen Sutherland algorithm.
virtual Int_t	ClippingCode (Double_t x, Double_t y, Double_t xcl1, Double_t ycl1, Double_t xcl2, Double_t ycl2)
	Compute the endpoint codes for TPad::Clip.
virtual Int_t	ClipPolygon (Int_t n, Double_t *x, Double_t *y, Int_t nn, Double_t *xc, Double_t *yc, Double_t xclipl, Double_t yclipb, Double_t xclipr, Double_t yclipt)
	Clip polygon using the Sutherland-Hodgman algorithm.
void	Close (Option_t *option="") override
	Delete all primitives in pad and pad itself.
void	CloseToolTip (TObject *tip) override
	Hide tool tip.
void	CopyPixmap () override
	Copy the pixmap of the pad to the canvas.
void	CopyPixmaps () override
	Copy the sub-pixmaps of the pad to the canvas.
TObject *	CreateToolTip (const TBox *b, const char *text, Long_t delayms) override
	Create a tool tip and return its pointer.
void	DeleteExec (const char *name) override
	Remove TExec name from the list of Execs.
void	DeleteToolTip (TObject *tip) override
	Delete tool tip object.
void	Divide (Int_t nx=1, Int_t ny=1, Float_t xmargin=0.01, Float_t ymargin=0.01, Int_t color=0) override
	Automatic pad generation by division.
virtual void	DivideSquare (Int_t n, Float_t xmargin=0.01, Float_t ymargin=0.01, Int_t color=0)
	"n" is the total number of sub-pads.
void	Draw (Option_t *option="") override
	Draw Pad in Current pad (re-parent pad if necessary).
void	DrawClassObject (const TObject *obj, Option_t *option="") override
	Draw class inheritance tree of the class to which obj belongs.
void	DrawCollideGrid ()
	This method draws the collide grid on top of the canvas.
virtual void	DrawCrosshair ()
	Function called to draw a crosshair in the canvas.
TH1F *	DrawFrame (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax, const char *title="") override
	Draw an empty pad frame with X and Y axis.
virtual void	EventPave ()
void	ExecuteEventAxis (Int_t event, Int_t px, Int_t py, TAxis *axis) override
	Execute action corresponding to one event for a TAxis object (called by TAxis::ExecuteEvent.) This member function is called when an axis is clicked with the locator.
TObject *	FindObject (const char *name) const override
	Search if object named name is inside this pad or in pads inside this pad.
TObject *	FindObject (const TObject *obj) const override
	Search if obj is in pad or in pads inside this pad.
Double_t	GetAbsHNDC () const override
Double_t	GetAbsWNDC () const override
Double_t	GetAbsXlowNDC () const override
Double_t	GetAbsYlowNDC () const override
Double_t	GetAspectRatio () const override
Rectangle_t	GetBBox () override
	Return the bounding Box of the Pad.
TPoint	GetBBoxCenter () override
	Return the center of the Pad as TPoint in pixels.
Short_t	GetBorderMode () const override
Short_t	GetBorderSize () const override
TCanvas *	GetCanvas () const override
Int_t	GetCanvasID () const override
	Get canvas identifier.
TCanvasImp *	GetCanvasImp () const override
	Get canvas implementation pointer if any.
Int_t	GetCrosshair () const
	Return the crosshair type (from the mother canvas) crosshair type = 0 means no crosshair.
Int_t	GetEvent () const override
	Get Event.
Int_t	GetEventX () const override
	Get X event.
Int_t	GetEventY () const override
	Get Y event.
TFrame *	GetFrame () override
	Get frame.
Int_t	GetGLDevice () override
	Get GL device.
Bool_t	GetGridx () const override
Bool_t	GetGridy () const override
Color_t	GetHighLightColor () const override
	Get highlight color.
Double_t	GetHNDC () const override
	Get height of pad along Y in Normalized Coordinates (NDC)
TList *	GetListOfExecs () const override
TList *	GetListOfPrimitives () const override
Int_t	GetLogx () const override
Int_t	GetLogy () const override
Int_t	GetLogz () const override
TVirtualPad *	GetMother () const override
const char *	GetName () const override
	Returns name of object.
Int_t	GetNumber () const override
TVirtualPad *	GetPad (Int_t subpadnumber) const override
	Get a pointer to subpadnumber of this pad.
Int_t	GetPadPaint () const override
void	GetPadPar (Double_t &xlow, Double_t &ylow, Double_t &xup, Double_t &yup) override
	Return lower and upper bounds of the pad in NDC coordinates.
TObject *	GetPadPointer () const override
TVirtualPad *	GetPadSave () const override
	Get save pad.
TVirtualPadPainter *	GetPainter () override
	Get pad painter from TCanvas.
Double_t	GetPhi () const override
Int_t	GetPixmapID () const override
TObject *	GetPrimitive (const char *name) const override
	Get primitive.
void	GetRange (Double_t &x1, Double_t &y1, Double_t &x2, Double_t &y2) override
	Return pad world coordinates range.
void	GetRangeAxis (Double_t &xmin, Double_t &ymin, Double_t &xmax, Double_t &ymax) override
	Return pad axis coordinates range.
TObject *	GetSelected () const override
	Get selected.
TVirtualPad *	GetSelectedPad () const override
	Get selected pad.
Double_t	GetTheta () const override
Int_t	GetTickx () const override
Int_t	GetTicky () const override
const char *	GetTitle () const override
	Returns title of object.
Double_t	GetUxmax () const override
	Returns the maximum x-coordinate value visible on the pad. If log axis the returned value is in decades.
Double_t	GetUxmin () const override
	Returns the minimum x-coordinate value visible on the pad. If log axis the returned value is in decades.
Double_t	GetUymax () const override
	Returns the maximum y-coordinate value visible on the pad. If log axis the returned value is in decades.
Double_t	GetUymin () const override
	Returns the minimum y-coordinate value visible on the pad. If log axis the returned value is in decades.
TView *	GetView () const override
TObject *	GetView3D () const override
TVirtualViewer3D *	GetViewer3D (Option_t *type="") override
	Create/obtain handle to 3D viewer.
TVirtualPad *	GetVirtCanvas () const override
	Get virtual canvas.
UInt_t	GetWh () const override
	Get Wh.
Double_t	GetWNDC () const override
	Get width of pad along X in Normalized Coordinates (NDC)
UInt_t	GetWw () const override
	Get Ww.
Double_t	GetX1 () const override
Double_t	GetX2 () const override
Double_t	GetXlowNDC () const override
Double_t	GetY1 () const override
Double_t	GetY2 () const override
Double_t	GetYlowNDC () const override
Bool_t	HasCrosshair () const override
	Return kTRUE if the crosshair has been activated (via SetCrosshair).
Bool_t	HasFixedAspectRatio () const override
ULong_t	Hash () const override
	Return hash value for this object.
Bool_t	HasViewer3D () const override
void	HighLight (Color_t col=kRed, Bool_t set=kTRUE) override
	Highlight pad.
Int_t	IncrementPaletteColor (Int_t i, TString opt) override
	Increment (i==1) or set (i>1) the number of autocolor in the pad.
Bool_t	IsBatch () const override
	Is pad in batch mode ?
virtual Bool_t	IsEditable () const override
Bool_t	IsFolder () const override
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
Bool_t	IsModified () const override
Bool_t	IsRetained () const override
	Is pad retained ?
Bool_t	IsVertical () const override
void	ls (Option_t *option="") const override
	List all primitives in pad.
void	Modified (Bool_t flag=1) override
Int_t	NextPaletteColor () override
	Get the next autocolor in the pad.
Bool_t	OpaqueMoving () const override
	Is pad moving in opaque mode ?
Bool_t	OpaqueResizing () const override
	Is pad resizing in opaque mode ?
Double_t	PadtoX (Double_t x) const override
	Convert x from pad to X.
Double_t	PadtoY (Double_t y) const override
	Convert y from pad to Y.
void	Paint (Option_t *option="") override
	Paint all primitives in pad.
void	PaintBox (Double_t x1, Double_t y1, Double_t x2, Double_t y2, Option_t *option="") override
	Paint box in CurrentPad World coordinates.
void	PaintFillArea (Int_t n, Double_t *x, Double_t *y, Option_t *option="") override
	Paint fill area in CurrentPad World coordinates.
void	PaintFillArea (Int_t n, Float_t *x, Float_t *y, Option_t *option="") override
void	PaintFillAreaHatches (Int_t n, Double_t *x, Double_t *y, Int_t FillStyle)
	This function paints hatched fill area according to the FillStyle value The convention for the Hatch is the following:
void	PaintFillAreaNDC (Int_t n, Double_t *x, Double_t *y, Option_t *option="") override
	Paint fill area in CurrentPad NDC coordinates.
void	PaintHatches (Double_t dy, Double_t angle, Int_t nn, Double_t *xx, Double_t *yy)
	This routine draw hatches inclined with the angle "angle" and spaced of "dy" in normalized device coordinates in the surface defined by n,xx,yy.
void	PaintLine (Double_t x1, Double_t y1, Double_t x2, Double_t y2) override
	Paint line in CurrentPad World coordinates.
void	PaintLine3D (Double_t *p1, Double_t *p2) override
	Paint 3-D line in the CurrentPad.
void	PaintLine3D (Float_t *p1, Float_t *p2) override
	Paint 3-D line in the CurrentPad.
void	PaintLineNDC (Double_t u1, Double_t v1, Double_t u2, Double_t v2) override
	Paint line in normalized coordinates.
void	PaintModified () override
	Traverse pad hierarchy and (re)paint only modified pads.
void	PaintPadFrame (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax) override
	Paint histogram/graph frame.
void	PaintPolyLine (Int_t n, Double_t *x, Double_t *y, Option_t *option="") override
	Paint polyline in CurrentPad World coordinates.
void	PaintPolyLine (Int_t n, Float_t *x, Float_t *y, Option_t *option="") override
	Paint polyline in CurrentPad World coordinates.
void	PaintPolyLine3D (Int_t n, Double_t *p) override
	Paint 3-D polyline in the CurrentPad.
void	PaintPolyLineNDC (Int_t n, Double_t *x, Double_t *y, Option_t *option="") override
	Paint polyline in CurrentPad NDC coordinates.
void	PaintPolyMarker (Int_t n, Double_t *x, Double_t *y, Option_t *option="") override
	Paint polymarker in CurrentPad World coordinates.
void	PaintPolyMarker (Int_t n, Float_t *x, Float_t *y, Option_t *option="") override
	Paint polymarker in CurrentPad World coordinates.
void	PaintText (Double_t x, Double_t y, const char *text) override
	Paint text in CurrentPad World coordinates.
void	PaintText (Double_t x, Double_t y, const wchar_t *text) override
	Paint text in CurrentPad World coordinates.
void	PaintTextNDC (Double_t u, Double_t v, const char *text) override
	Paint text in CurrentPad NDC coordinates.
void	PaintTextNDC (Double_t u, Double_t v, const wchar_t *text) override
	Paint text in CurrentPad NDC coordinates.
Double_t	PixeltoX (Int_t px) override
virtual void	PixeltoXY (Int_t xpixel, Int_t ypixel, Double_t &x, Double_t &y)
Double_t	PixeltoY (Int_t py) override
Bool_t	PlaceBox (TObject *o, Double_t w, Double_t h, Double_t &xl, Double_t &yb) override
	Place a box in NDC space.
void	Pop () override
	Pop pad to the top of the stack.
void	Print (const char *filename, Option_t *option) override
	Save Canvas contents in a file in one of various formats.
void	Print (const char *filename="") const override
	This method is equivalent to SaveAs("filename"). See TPad::SaveAs for details.
void	Range (Double_t x1, Double_t y1, Double_t x2, Double_t y2) override
	Set world coordinate system for the pad.
void	RangeAxis (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax) override
	Set axis coordinate system for the pad.
virtual void	RangeChanged ()
virtual void	RecordLatex (const TObject *obj)
	Emit RecordLatex() signal.
virtual void	RecordPave (const TObject *obj)
	Emit RecordPave() signal.
void	RecursiveRemove (TObject *obj) override
	Recursively remove object from a pad and its sub-pads.
void	RedrawAxis (Option_t *option="") override
	Redraw the frame axis.
void	ReleaseViewer3D (Option_t *type="") override
	Release current (external) viewer.
void	ResetToolTip (TObject *tip) override
	Reset tool tip, i.e.
void	ResetView3D (TObject *view=nullptr) override
virtual void	Resized ()
void	ResizePad (Option_t *option="") override
	Compute pad conversion coefficients.
void	SaveAs (const char *filename="", Option_t *option="") const override
	Save the pad content in a file.
void	SetAttFillPS (Color_t color, Style_t style) override
	Set postscript fill area attributes.
void	SetAttLinePS (Color_t color, Style_t style, Width_t lwidth) override
	Set postscript line attributes.
void	SetAttMarkerPS (Color_t color, Style_t style, Size_t msize) override
	Set postscript marker attributes.
void	SetAttTextPS (Int_t align, Float_t angle, Color_t color, Style_t font, Float_t tsize) override
	Set postscript text attributes.
void	SetBBoxCenter (const TPoint &p) override
	Set center of the Pad.
void	SetBBoxCenterX (const Int_t x) override
	Set X coordinate of the center of the Pad.
void	SetBBoxCenterY (const Int_t y) override
	Set Y coordinate of the center of the Pad.
void	SetBBoxX1 (const Int_t x) override
	Set lefthandside of BoundingBox to a value (resize in x direction on left)
void	SetBBoxX2 (const Int_t x) override
	Set right hand side of BoundingBox to a value (resize in x direction on right)
void	SetBBoxY1 (const Int_t y) override
	Set top of BoundingBox to a value (resize in y direction on top)
void	SetBBoxY2 (const Int_t y) override
	Set bottom of BoundingBox to a value (resize in y direction on bottom)
void	SetBorderMode (Short_t bordermode) override
void	SetBorderSize (Short_t bordersize) override
void	SetCanvas (TCanvas *c) override
void	SetCanvasSize (UInt_t ww, UInt_t wh) override
	Set canvas size.
void	SetCopyGLDevice (Bool_t copy) override
void	SetCrosshair (Int_t crhair=1) override
	Set crosshair active/inactive.
void	SetCursor (ECursor cursor) override
	Set cursor type.
void	SetDoubleBuffer (Int_t mode=1) override
	Set double buffer mode ON or OFF.
void	SetDrawOption (Option_t *option="") override
	Set drawing option for object.
void	SetEditable (Bool_t mode=kTRUE) override
	Set pad editable yes/no If a pad is not editable:
void	SetFillStyle (Style_t fstyle) override
	Override TAttFill::FillStyle for TPad because we want to handle style=0 as style 4000.
void	SetFixedAspectRatio (Bool_t fixed=kTRUE) override
	Fix pad aspect ratio to current value if fixed is true.
virtual void	SetGLDevice (Int_t dev)
void	SetGrid (Int_t valuex=1, Int_t valuey=1) override
void	SetGridx (Int_t value=1) override
void	SetGridy (Int_t value=1) override
void	SetLogx (Int_t value=1) override
	Set Lin/Log scale for X.
void	SetLogy (Int_t value=1) override
	Set Lin/Log scale for Y.
void	SetLogz (Int_t value=1) override
	Set Lin/Log scale for Z.
void	SetName (const char *name) override
virtual void	SetNumber (Int_t number)
void	SetPad (const char *name, const char *title, Double_t xlow, Double_t ylow, Double_t xup, Double_t yup, Color_t color=35, Short_t bordersize=5, Short_t bordermode=-1) override
	Set all pad parameters.
void	SetPad (Double_t xlow, Double_t ylow, Double_t xup, Double_t yup) override
	Set canvas range for pad and resize the pad.
void	SetPhi (Double_t phi=30) override
void	SetSelected (TObject *obj) override
	Set selected.
void	SetTheta (Double_t theta=30) override
void	SetTicks (Int_t valuex=1, Int_t valuey=1) override
void	SetTickx (Int_t value=1) override
void	SetTicky (Int_t value=1) override
void	SetTitle (const char *title="") override
void	SetToolTipText (const char *text, Long_t delayms=1000) override
	Set tool tip text associated with this pad.
void	SetVertical (Bool_t vert=kTRUE) override
	Set pad vertical (default) or horizontal.
void	SetView (TView *view=nullptr) override
	Set the current TView. Delete previous view if view=0.
void	SetViewer3D (TVirtualViewer3D *viewer3d) override
void	ShowGuidelines (TObject *object, const Int_t event, const char mode='i', const bool cling=true) override
	Shows lines to indicate if a TAttBBox2D object is aligned to the center or to another object, shows distance arrows if two objects on screen have the same distance to another object Call from primitive in Execute Event, in ButtonMotion after the new coordinates have been set, to 'stick' once when button is up to delete lines.
virtual void	StartEditing ()
void	Update () override
	Update pad.
void	UseCurrentStyle () override
	Force a copy of current style for all objects in pad.
Int_t	UtoAbsPixel (Double_t u) const override
Int_t	UtoPixel (Double_t u) const override
Int_t	VtoAbsPixel (Double_t v) const override
Int_t	VtoPixel (Double_t v) const override
TObject *	WaitPrimitive (const char *pname="", const char *emode="") override
	Loop and sleep until a primitive with name=pname is found in the pad.
virtual void	x3d (Option_t *type="")
	Deprecated: use TPad::GetViewer3D() instead.
Int_t	XtoAbsPixel (Double_t x) const override
Double_t	XtoPad (Double_t x) const override
	Convert x from X to pad.
Int_t	XtoPixel (Double_t x) const override
virtual void	XYtoAbsPixel (Double_t x, Double_t y, Int_t &xpixel, Int_t &ypixel) const
virtual void	XYtoPixel (Double_t x, Double_t y, Int_t &xpixel, Int_t &ypixel) const
Int_t	YtoAbsPixel (Double_t y) const override
Double_t	YtoPad (Double_t y) const override
	Convert y from Y to pad.
Int_t	YtoPixel (Double_t y) const override
Public Member Functions inherited from TVirtualPad
	TVirtualPad ()
	VirtualPad default constructor.
	TVirtualPad (const char *name, const char *title, Double_t xlow, Double_t ylow, Double_t xup, Double_t yup, Color_t color=19, Short_t bordersize=4, Short_t bordermode=1)
	VirtualPad constructor.
virtual	~TVirtualPad ()
	VirtualPad destructor.
Bool_t	IsBeingResized () const
virtual Bool_t	PadInHighlightMode () const
	Should always return false, unless you can highlight selected object in pad.
virtual Bool_t	PadInSelectionMode () const
	Should always return false unless you have non-standard picking.
virtual void	PopTopLevelSelectable ()
	Does nothing, unless you implement your own picking.
virtual void	PushSelectableObject (TObject *obj)
	Does nothing, unless you implement your own picking.
virtual void	PushTopLevelSelectable (TObject *top)
	Does nothing, unless you implement your own picking.
virtual void	RangeAxisChanged ()
virtual void	UnZoomed ()
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.
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 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	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.
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=0)
	Execute method on this object with the given parameter string, e.g.
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray.
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message.
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).
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).
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 Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.
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.
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	Warning (const char *method, const char *msgfmt,...) const
	Issue warning message.
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.
Public Member Functions inherited from TAttLine
	TAttLine ()
	AttLine default constructor.
	TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth)
	AttLine normal constructor.
virtual	~TAttLine ()
	AttLine destructor.
void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine.
Int_t	DistancetoLine (Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
	Compute distance from point px,py to a line.
virtual Color_t	GetLineColor () const
	Return the line color.
virtual Style_t	GetLineStyle () const
	Return the line style.
virtual Width_t	GetLineWidth () const
	Return the line width.
virtual void	Modify ()
	Change current line attributes if necessary.
virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values.
virtual void	SaveLineAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
	Save line attributes as C++ statement(s) on output stream out.
virtual void	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes.
virtual void	SetLineColor (Color_t lcolor)
	Set the line color.
virtual void	SetLineColorAlpha (Color_t lcolor, Float_t lalpha)
	Set a transparent line color.
virtual void	SetLineStyle (Style_t lstyle)
	Set the line style.
virtual void	SetLineWidth (Width_t lwidth)
	Set the line width.
Public Member Functions inherited from TAttFill
	TAttFill ()
	AttFill default constructor.
	TAttFill (Color_t fcolor, Style_t fstyle)
	AttFill normal constructor.
virtual	~TAttFill ()
	AttFill destructor.
void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill.
virtual Color_t	GetFillColor () const
	Return the fill area color.
virtual Style_t	GetFillStyle () const
	Return the fill area style.
virtual Bool_t	IsTransparent () const
virtual void	Modify ()
	Change current fill area attributes if necessary.
virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values.
virtual void	SaveFillAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
	Save fill attributes as C++ statement(s) on output stream out.
virtual void	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes.
virtual void	SetFillColor (Color_t fcolor)
	Set the fill area color.
virtual void	SetFillColorAlpha (Color_t fcolor, Float_t falpha)
	Set a transparent fill color.
Public Member Functions inherited from TAttPad
	TAttPad ()
	Constructor.
virtual	~TAttPad ()
	Destructor.
virtual void	Copy (TAttPad &attpad) const
	copy function
Float_t	GetAfile () const
Float_t	GetAstat () const
Float_t	GetBottomMargin () const
Int_t	GetFrameBorderMode () const
Width_t	GetFrameBorderSize () const
Color_t	GetFrameFillColor () const
Style_t	GetFrameFillStyle () const
Color_t	GetFrameLineColor () const
Style_t	GetFrameLineStyle () const
Width_t	GetFrameLineWidth () const
Float_t	GetLeftMargin () const
Float_t	GetRightMargin () const
Float_t	GetTopMargin () const
Float_t	GetXfile () const
Float_t	GetXstat () const
Float_t	GetYfile () const
Float_t	GetYstat () const
virtual void	ResetAttPad (Option_t *option="")
	Reset pad attributes.
virtual void	SetAfile (Float_t afile)
virtual void	SetAstat (Float_t astat)
virtual void	SetBottomMargin (Float_t bottommargin)
	Set Pad bottom margin in fraction of the pad height.
void	SetFrameBorderMode (Int_t mode=1)
void	SetFrameBorderSize (Width_t size=1)
void	SetFrameFillColor (Color_t color=1)
void	SetFrameFillStyle (Style_t styl=0)
void	SetFrameLineColor (Color_t color=1)
void	SetFrameLineStyle (Style_t styl=0)
void	SetFrameLineWidth (Width_t width=1)
virtual void	SetLeftMargin (Float_t leftmargin)
	Set Pad left margin in fraction of the pad width.
virtual void	SetMargin (Float_t left, Float_t right, Float_t bottom, Float_t top)
	Set all margins.
virtual void	SetRightMargin (Float_t rightmargin)
	Set Pad right margin in fraction of the pad width.
virtual void	SetTopMargin (Float_t topmargin)
	Set Pad top margin in fraction of the pad height.
virtual void	SetXfile (Float_t xfile)
virtual void	SetXstat (Float_t xstat)
virtual void	SetYfile (Float_t yfile)
virtual void	SetYstat (Float_t ystat)
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=0, void *receiver=0, const char *slot=0)
	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=0)
virtual void	LowPriority (const char *signal_name, const char *slot_name=0)
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.
Public Member Functions inherited from TAttBBox2D
virtual	~TAttBBox2D ()

Static Public Member Functions
static TCanvas *	MakeDefCanvas ()
	Static function to build a default canvas.
static void	SetFolder (Bool_t isfolder=kTRUE)
	If isfolder=kTRUE, the canvas can be browsed like a folder by default a canvas is not browsable.
static Bool_t	SupportAlpha ()
	Static function returning "true" if transparency is supported.
Static Public Member Functions inherited from TPad
static void	DrawColorTable ()
	Static function to Display Color Table in a pad.
static Int_t	GetMaxPickDistance ()
	Static function (see also TPad::SetMaxPickDistance)
static void	SetMaxPickDistance (Int_t maxPick=5)
	static function to set the maximum Pick Distance fgMaxPickDistance This parameter is used in TPad::Pick to select an object if its DistancetoPrimitive returns a value < fgMaxPickDistance The default value is 5 pixels.
Static Public Member Functions inherited from TVirtualPad
static TVirtualPad *&	Pad ()
	Return the current pad for the current thread.
Static Public Member Functions inherited from TObject
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 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 Bool_t	Disconnect (const char *class_name, const char *signal, void *receiver=0, const char *slot=0)
	Disconnects "class signal".
static Bool_t	Disconnect (TQObject *sender, const char *signal=0, void *receiver=0, const char *slot=0)
	Disconnects signal in object sender from slot_method in object receiver.

Protected Member Functions
void	ExecuteEvent (Int_t event, Int_t px, Int_t py) override
	Execute action corresponding to one event.
void	Init ()
	Initialize the TCanvas members. Called by all constructors.
Protected Member Functions inherited from TPad
void	DestroyExternalViewer3D ()
Int_t	DistancetoPrimitive (Int_t px, Int_t py) override
	Compute distance from point px,py to a box.
void	ExecuteEvent (Int_t event, Int_t px, Int_t py) override
	Execute action corresponding to one event.
virtual void	HideToolTip (Int_t event)
	Hide tool tip depending on the event type.
void	PaintBorder (Color_t color, Bool_t tops)
	Paint the pad border.
void	PaintBorderPS (Double_t xl, Double_t yl, Double_t xt, Double_t yt, Int_t bmode, Int_t bsize, Int_t dark, Int_t light) override
	Paint a frame border with Postscript.
void	PaintDate ()
	Paint the current date and time if the option date is on.
void	SavePrimitive (std::ostream &out, Option_t *option="") override
	Save primitives in this pad on the C++ source file out.
void	SetBatch (Bool_t batch=kTRUE) override
	Set pad in batch mode.
Protected Member Functions inherited from TVirtualPad
void *	GetSender () override
	true when resizing the pad
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

Protected Attributes
Bool_t	fBatch
	! True when in batchmode
Int_t	fCanvasID
	! Canvas identifier
TCanvasImp *	fCanvasImp
	! Window system specific canvas implementation
TAttCanvas	fCatt
	Canvas attributes.
UInt_t	fCh
	Height of the canvas along Y (pixels)
TObject *	fClickSelected
	! Currently click-selected object
TPad *	fClickSelectedPad
	! Pad containing currently click-selected object
TContextMenu *	fContextMenu
	! Context menu pointer
UInt_t	fCw
	Width of the canvas along X (pixels)
TString	fDISPLAY
	Name of destination screen.
Int_t	fDoubleBuffer
	Double buffer flag (0=off, 1=on)
Bool_t	fDrawn
	! Set to True when the Draw method is called
Int_t	fEvent
	! Type of current or last handled event
Int_t	fEventX
	! Last X mouse position in canvas
Int_t	fEventY
	! Last Y mouse position in canvas
Color_t	fHighLightColor
	Highlight color of active pad.
TPad *	fPadSave
	! Pointer to saved pad in HandleInput
TVirtualPadPainter *	fPainter
	! Canvas (pad) painter.
Bool_t	fRetained
	Retain structure flag.
TObject *	fSelected
	! Currently selected object
TString	fSelectedOpt
	! Drawing option of selected object
TPad *	fSelectedPad
	! Pad containing currently selected object
Int_t	fSelectedX
	! X of selected object
Int_t	fSelectedY
	! Y of selected object
Bool_t	fUpdating
	! True when Updating the canvas
Bool_t	fUseGL
	! True when rendering is with GL
UInt_t	fWindowHeight
	Height of window (including menubar, borders, etc.)
Int_t	fWindowTopX
	Top X position of window (in pixels)
Int_t	fWindowTopY
	Top Y position of window (in pixels)
UInt_t	fWindowWidth
	Width of window (including borders, etc.)
Size_t	fXsizeReal
	Current size of canvas along X in CM.
Size_t	fXsizeUser
	User specified size of canvas along X in CM.
Size_t	fYsizeReal
	Current size of canvas along Y in CM.
Size_t	fYsizeUser
	User specified size of canvas along Y in CM.
Protected Attributes inherited from TPad
Bool_t	fAbsCoord
	Use absolute coordinates.
Double_t	fAbsHNDC
	Absolute Height of pad along Y in NDC.
Double_t	fAbsPixeltoXk
	Conversion coefficient for absolute pixel to X World.
Double_t	fAbsPixeltoYk
	Conversion coefficient for absolute pixel to Y World.
Double_t	fAbsWNDC
	Absolute Width of pad along X in NDC.
Double_t	fAbsXlowNDC
	Absolute X top left corner of pad in NDC [0,1].
Double_t	fAbsYlowNDC
	Absolute Y top left corner of pad in NDC [0,1].
Double_t	fAspectRatio
	ratio of w/h in case of fixed ratio
Short_t	fBorderMode
	Bordermode (-1=down, 0 = no border, 1=up)
Short_t	fBorderSize
	pad bordersize in pixels
TCanvas *	fCanvas
	! Pointer to mother canvas
Int_t	fCGnx
	! Size of the collide grid along x
Int_t	fCGny
	! Size of the collide grid along y
Bool_t *	fCollideGrid
	! Grid used to find empty space when adding a box (Legend) in a pad
Bool_t	fCopyGLDevice
	!
Int_t	fCrosshair
	Crosshair type (0 if no crosshair requested)
Int_t	fCrosshairPos
	Position of crosshair.
Bool_t	fEditable
	True if canvas is editable.
Bool_t	fEmbeddedGL
	!
TList *	fExecs
	List of commands to be executed when a pad event occurs.
Bool_t	fFixedAspectRatio
	True if fixed aspect ratio.
TFrame *	fFrame
	! Pointer to 2-D frame (if one exists)
Int_t	fGLDevice
	! OpenGL off-screen pixmap identifier
Bool_t	fGridx
	Set to true if grid along X.
Bool_t	fGridy
	Set to true if grid along Y.
Double_t	fHNDC
	Height of pad along Y in Normalized Coordinates (NDC)
Int_t	fLogx
	(=0 if X linear scale, =1 if log scale)
Int_t	fLogy
	(=0 if Y linear scale, =1 if log scale)
Int_t	fLogz
	(=0 if Z linear scale, =1 if log scale)
Bool_t	fModified
	Set to true when pad is modified.
TPad *	fMother
	! pointer to mother of the list
TString	fName
	Pad name.
Int_t	fNextPaletteColor
	Next automatic color.
Int_t	fNumber
	pad number identifier
Int_t	fNumPaletteColor
	Number of objects with an automatic color.
Int_t	fPadPaint
	Set to 1 while painting the pad.
TObject *	fPadPointer
	! free pointer
TObject *	fPadView3D
	! 3D View of this TPad
Double_t	fPhi
	phi angle to view as lego/surface
Double_t	fPixeltoX
	xworld = fPixeltoXk + fPixeltoX*xpixel
Double_t	fPixeltoXk
	Conversion coefficient for pixel to X World.
Double_t	fPixeltoY
	yworld = fPixeltoYk + fPixeltoY*ypixel
Double_t	fPixeltoYk
	Conversion coefficient for pixel to Y World.
Int_t	fPixmapID
	! Off-screen pixmap identifier
TList *	fPrimitives
	->List of primitives (subpads)
Double_t	fTheta
	theta angle to view as lego/surface
Int_t	fTickx
	Set to 1 if tick marks along X.
Int_t	fTicky
	Set to 1 if tick marks along Y.
TString	fTitle
	Pad title.
Double_t	fUtoAbsPixelk
	Conversion coefficient for U NDC to absolute pixel.
Double_t	fUtoPixel
	xpixel = fUtoPixelk + fUtoPixel*undc
Double_t	fUtoPixelk
	Conversion coefficient for U NDC to pixel.
Double_t	fUxmax
	Maximum value on the X axis.
Double_t	fUxmin
	Minimum value on the X axis.
Double_t	fUymax
	Maximum value on the Y axis.
Double_t	fUymin
	Minimum value on the Y axis.
TView *	fView
	! Pointer to 3-D view (if one exists)
TVirtualViewer3D *	fViewer3D
	! Current 3D viewer
Double_t	fVtoAbsPixelk
	Conversion coefficient for V NDC to absolute pixel.
Double_t	fVtoPixel
	ypixel = fVtoPixelk + fVtoPixel*vndc
Double_t	fVtoPixelk
	Conversion coefficient for V NDC to pixel.
Double_t	fWNDC
	Width of pad along X in Normalized Coordinates (NDC)
Double_t	fX1
	X of lower X coordinate.
Double_t	fX2
	X of upper X coordinate.
Double_t	fXlowNDC
	X bottom left corner of pad in NDC [0,1].
Double_t	fXtoAbsPixelk
	Conversion coefficient for X World to absolute pixel.
Double_t	fXtoPixel
	xpixel = fXtoPixelk + fXtoPixel*xworld
Double_t	fXtoPixelk
	Conversion coefficient for X World to pixel.
Double_t	fXUpNDC
Double_t	fY1
	Y of lower Y coordinate.
Double_t	fY2
	Y of upper Y coordinate.
Double_t	fYlowNDC
	Y bottom left corner of pad in NDC [0,1].
Double_t	fYtoAbsPixelk
	Conversion coefficient for Y World to absolute pixel.
Double_t	fYtoPixel
	ypixel = fYtoPixelk + fYtoPixel*yworld
Double_t	fYtoPixelk
	Conversion coefficient for Y World to pixel.
Double_t	fYUpNDC
Protected Attributes inherited from TVirtualPad
Bool_t	fResizing
Protected Attributes inherited from TAttLine
Color_t	fLineColor
	Line color.
Style_t	fLineStyle
	Line style.
Width_t	fLineWidth
	Line width.
Protected Attributes inherited from TAttFill
Color_t	fFillColor
	Fill area color.
Style_t	fFillStyle
	Fill area style.
Protected Attributes inherited from TAttPad
Float_t	fAfile
	Alignment for the file name.
Float_t	fAstat
	Alignment for the statistics.
Float_t	fBottomMargin
	BottomMargin.
Int_t	fFrameBorderMode
	Pad frame border mode.
Width_t	fFrameBorderSize
	Pad frame border size.
Color_t	fFrameFillColor
	Pad frame fill color.
Style_t	fFrameFillStyle
	Pad frame fill style.
Color_t	fFrameLineColor
	Pad frame line color.
Style_t	fFrameLineStyle
	Pad frame line style.
Width_t	fFrameLineWidth
	Pad frame line width.
Float_t	fLeftMargin
	LeftMargin.
Float_t	fRightMargin
	RightMargin.
Float_t	fTopMargin
	TopMargin.
Float_t	fXfile
	X position where to draw the file name.
Float_t	fXstat
	X position where to draw the statistics.
Float_t	fYfile
	Y position where to draw the file name.
Float_t	fYstat
	Y position where to draw the statistics.
Protected Attributes inherited from TQObject
TList *	fListOfConnections
	list of signals from this object
TList *	fListOfSignals
Bool_t	fSignalsBlocked
	list of connections to this object

Static Protected Attributes
static Bool_t	fgIsFolder = kFALSE
	Indicates if canvas can be browsed as a folder.
Static Protected Attributes inherited from TPad
static Int_t	fgMaxPickDistance = 5
	Maximum Pick Distance.
Static Protected Attributes inherited from TQObject
static Bool_t	fgAllSignalsBlocked = kFALSE
	flag used for suppression of signals

Private Member Functions
	TCanvas (const TCanvas &canvas)=delete
void	Build ()
	Build a canvas. Called by all constructors.
void	CopyPixmaps () override
	Copy the canvas pixmap of the pad to the canvas.
void	CreatePainter ()
	Probably, TPadPainter must be placed in a separate ROOT module - "padpainter" (the same as "histpainter").
void	DrawEventStatus (Int_t event, Int_t x, Int_t y, TObject *selected)
	Report name and title of primitive below the cursor.
TCanvas &	operator= (const TCanvas &rhs)=delete
void	RunAutoExec ()
	Execute the list of TExecs in the current pad.

Friends
class	TCanvasImp
class	TInterpreter
class	TThread

Additional Inherited Members
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(3) }
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.

#include <TCanvas.h>

Inheritance diagram for TCanvas:

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
kShowEventStatus
kAutoExec
kMenuBar
kShowToolBar
kShowEditor
kMoveOpaque
kResizeOpaque
kIsGrayscale
kShowToolTips

Definition at line 86 of file TCanvas.h.

Constructor & Destructor Documentation

TCanvas() [1/6]

TCanvas::TCanvas ( const TCanvas &  canvas )

privatedelete

TCanvas() [2/6]

TCanvas::TCanvas

(

Bool_t

build = kTRUE

)

Canvas default constructor.

Definition at line 128 of file TCanvas.cxx.

TCanvas() [3/6]

TCanvas::TCanvas	(	const char *	name,
		const char *	title = "",
		Int_t	form = 1
	)

Create a new canvas with a predefined size form.

If form < 0 the menubar is not shown.

• form = 1 700x500 at 10,10 (set by TStyle::SetCanvasDefH,W,X,Y)
• form = 2 500x500 at 20,20
• form = 3 500x500 at 30,30
• form = 4 500x500 at 40,40
• form = 5 500x500 at 50,50

If "name" starts with "gl" the canvas is ready to receive GL output.

Definition at line 259 of file TCanvas.cxx.

TCanvas() [4/6]

TCanvas::TCanvas	(	const char *	name,
		const char *	title,
		Int_t	ww,
		Int_t	wh
	)

Create a new canvas at a random position.

Parameters

[in]	name	canvas name
[in]	title	canvas title
[in]	ww	is the canvas size in pixels along X (if ww < 0 the menubar is not shown)
[in]	wh	is the canvas size in pixels along Y

If "name" starts with "gl" the canvas is ready to receive GL output.

Definition at line 362 of file TCanvas.cxx.

TCanvas() [5/6]

TCanvas::TCanvas	(	const char *	name,
		const char *	title,
		Int_t	wtopx,
		Int_t	wtopy,
		Int_t	ww,
		Int_t	wh
	)

Create a new canvas.

Parameters

[in]	name	canvas name
[in]	title	canvas title
[in]	wtopx,wtopy	are the pixel coordinates of the top left corner of the canvas (if wtopx < 0) the menubar is not shown)
[in]	ww	is the canvas size in pixels along X
[in]	wh	is the canvas size in pixels along Y

If "name" starts with "gl" the canvas is ready to receive GL output.

Definition at line 448 of file TCanvas.cxx.

TCanvas() [6/6]

TCanvas::TCanvas	(	const char *	name,
		Int_t	ww,
		Int_t	wh,
		Int_t	winid
	)

Create an embedded canvas, i.e.

a canvas that is in a TGCanvas widget which is placed in a TGFrame. This ctor is only called via the TRootEmbeddedCanvas class.

If "name" starts with "gl" the canvas is ready to receive GL output.

Definition at line 213 of file TCanvas.cxx.

~TCanvas()

TCanvas::~TCanvas ( )

virtual

Canvas destructor.

Definition at line 664 of file TCanvas.cxx.

Member Function Documentation

Browse()

void TCanvas::Browse ( TBrowser *  b )

overridevirtual

Browse.

Reimplemented from TObject.

Definition at line 672 of file TCanvas.cxx.

Build()

void TCanvas::Build ( )

private

Build a canvas. Called by all constructors.

Definition at line 574 of file TCanvas.cxx.

cd()

TVirtualPad * TCanvas::cd ( Int_t  subpadnumber = 0 )

overridevirtual

Set current canvas & pad.

Returns the new current pad, or 0 in case of failure. See TPad::cd() for an explanation of the parameter.

Implements TVirtualPad.

Definition at line 706 of file TCanvas.cxx.

Clear()

void TCanvas::Clear ( Option_t *  option = "" )

overridevirtual

Remove all primitives from the canvas.

If option "D" is specified, direct sub-pads are cleared but not deleted. This option is not recursive, i.e. pads in direct sub-pads are deleted.

Implements TVirtualPad.

Definition at line 725 of file TCanvas.cxx.

Cleared()

void TCanvas::Cleared ( TVirtualPad *  pad )

virtual

Emit pad Cleared signal.

Definition at line 758 of file TCanvas.cxx.

ClearPadSave()

void TCanvas::ClearPadSave ( )

inline

Definition at line 138 of file TCanvas.h.

Close()

void TCanvas::Close ( Option_t *  option = "" )

overridevirtual

Close canvas.

Delete window/pads data structure

Implements TVirtualPad.

Definition at line 776 of file TCanvas.cxx.

Closed()

void TCanvas::Closed ( )

overridevirtual

Emit Closed signal.

Reimplemented from TPad.

Definition at line 766 of file TCanvas.cxx.

Constructor() [1/4]

void TCanvas::Constructor

(

)

Canvas default constructor.

Definition at line 181 of file TCanvas.cxx.

Constructor() [2/4]

void TCanvas::Constructor	(	const char *	name,
		const char *	title,
		Int_t	form
	)

Create a new canvas with a predefined size form.

If form < 0 the menubar is not shown.

• form = 1 700x500 at 10,10 (set by TStyle::SetCanvasDefH,W,X,Y)
• form = 2 500x500 at 20,20
• form = 3 500x500 at 30,30
• form = 4 500x500 at 40,40
• form = 5 500x500 at 50,50

Definition at line 277 of file TCanvas.cxx.

Constructor() [3/4]

void TCanvas::Constructor	(	const char *	name,
		const char *	title,
		Int_t	wtopx,
		Int_t	wtopy,
		Int_t	ww,
		Int_t	wh
	)

Create a new canvas.

Parameters

[in]	name	canvas name
[in]	title	canvas title
[in]	wtopx,wtopy	are the pixel coordinates of the top left corner of the canvas (if wtopx < 0) the menubar is not shown)
[in]	ww	is the canvas size in pixels along X
[in]	wh	is the canvas size in pixels along Y

Definition at line 467 of file TCanvas.cxx.

Constructor() [4/4]

void TCanvas::Constructor	(	const char *	name,
		const char *	title,
		Int_t	ww,
		Int_t	wh
	)

Create a new canvas at a random position.

Parameters

[in]	name	canvas name
[in]	title	canvas title
[in]	ww	is the canvas size in pixels along X (if ww < 0 the menubar is not shown)
[in]	wh	is the canvas size in pixels along Y

Definition at line 379 of file TCanvas.cxx.

CopyPixmaps()

void TCanvas::CopyPixmaps ( )

overrideprivatevirtual

Copy the canvas pixmap of the pad to the canvas.

Implements TVirtualPad.

Definition at line 825 of file TCanvas.cxx.

CreatePainter()

void TCanvas::CreatePainter ( )

private

Probably, TPadPainter must be placed in a separate ROOT module - "padpainter" (the same as "histpainter").

But now, it's directly in a gpad dir, so, in case of default painter, no *.so should be loaded, no need in plugin managers. May change in future.

Definition at line 2584 of file TCanvas.cxx.

Delete()

void TCanvas::Delete ( Option_t *  option = "" )

inlineoverridevirtual

Delete this object.

Typically called as a command via the interpreter. Normally use "delete" operator when object has been allocated on the heap.

Reimplemented from TObject.

Definition at line 118 of file TCanvas.h.

DeleteCanvasPainter()

void TCanvas::DeleteCanvasPainter

(

)

assert on IsBatch() == false?

Definition at line 2615 of file TCanvas.cxx.

Destructor()

void TCanvas::Destructor

(

)

Actual canvas destructor.

Definition at line 682 of file TCanvas.cxx.

DisconnectWidget()

void TCanvas::DisconnectWidget

(

)

Used by friend class TCanvasImp.

Definition at line 2552 of file TCanvas.cxx.

Draw()

void TCanvas::Draw ( Option_t *  option = "" )

overridevirtual

Draw a canvas.

If a canvas with the name is already on the screen, the canvas is repainted. This function is useful when a canvas object has been saved in a Root file. One can then do:

Root > Tfile f("file.root");
Root > canvas.Draw();

Implements TVirtualPad.

Definition at line 843 of file TCanvas.cxx.

DrawClone()

TObject * TCanvas::DrawClone ( Option_t *  option = "" ) const

overridevirtual

Draw a clone of this canvas A new canvas is created that is a clone of this canvas.

Reimplemented from TObject.

Definition at line 890 of file TCanvas.cxx.

DrawClonePad()

TObject * TCanvas::DrawClonePad ( )

virtual

Draw a clone of this canvas into the current pad In an interactive session, select the destination/current pad with the middle mouse button, then point to the canvas area to select the canvas context menu item DrawClonePad.

Note that the original canvas may have subpads.

Definition at line 907 of file TCanvas.cxx.

DrawEventStatus()

void TCanvas::DrawEventStatus ( Int_t  event, Int_t  px, Int_t  py, TObject *  selected  )

private

Report name and title of primitive below the cursor.

This function is called when the option "Event Status" in the canvas menu "Options" is selected.

Definition at line 962 of file TCanvas.cxx.

EditorBar()

void TCanvas::EditorBar ( )

virtual

Get editor bar.

Definition at line 1028 of file TCanvas.cxx.

EmbedInto()

void TCanvas::EmbedInto	(	Int_t	winid,
		Int_t	ww,
		Int_t	wh
	)

Embedded a canvas into a TRootEmbeddedCanvas.

This method is only called via TRootEmbeddedCanvas::AdoptCanvas.

Definition at line 1037 of file TCanvas.cxx.

EnterLeave()

void TCanvas::EnterLeave	(	TPad *	prevSelPad,
		TObject *	prevSelObj
	)

Generate kMouseEnter and kMouseLeave events depending on the previously selected object and the currently selected object.

Does nothing if the selected object does not change.

Definition at line 1063 of file TCanvas.cxx.

ExecuteEvent()

void TCanvas::ExecuteEvent ( Int_t  event, Int_t  px, Int_t  py  )

overrideprotectedvirtual

Execute action corresponding to one event.

This member function must be implemented to realize the action corresponding to the mouse click on the object in the canvas

Only handle mouse motion events in TCanvas, all other events are ignored for the time being

Reimplemented from TObject.

Definition at line 1100 of file TCanvas.cxx.

FeedbackMode()

void TCanvas::FeedbackMode

(

Bool_t

set

)

Turn rubberband feedback mode on or off.

Definition at line 1118 of file TCanvas.cxx.

Flush()

void TCanvas::Flush

(

)

Flush canvas buffers.

Definition at line 1132 of file TCanvas.cxx.

ForceUpdate()

void TCanvas::ForceUpdate

(

)

Force canvas update.

Definition at line 1166 of file TCanvas.cxx.

GetAutoExec()

Bool_t TCanvas::GetAutoExec ( ) const

inline

Definition at line 150 of file TCanvas.h.

GetCanvasID()

Int_t TCanvas::GetCanvasID ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 155 of file TCanvas.h.

GetCanvasImp()

TCanvasImp * TCanvas::GetCanvasImp ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 156 of file TCanvas.h.

GetCanvasPainter()

TVirtualPadPainter * TCanvas::GetCanvasPainter

(

)

Access and (probably) creation of pad painter.

Definition at line 2605 of file TCanvas.cxx.

GetCanvasPar()

virtual void TCanvas::GetCanvasPar ( Int_t &  wtopx, Int_t &  wtopy, UInt_t &  ww, UInt_t &  wh  )

inlinevirtual

Definition at line 163 of file TCanvas.h.

GetClickSelected()

TObject * TCanvas::GetClickSelected ( ) const

inline

Definition at line 140 of file TCanvas.h.

GetClickSelectedPad()

TVirtualPad * TCanvas::GetClickSelectedPad ( ) const

inline

Definition at line 145 of file TCanvas.h.

GetContextMenu()

TContextMenu * TCanvas::GetContextMenu ( ) const

inline

Definition at line 131 of file TCanvas.h.

GetDISPLAY()

const char * TCanvas::GetDISPLAY ( ) const

inline

Definition at line 130 of file TCanvas.h.

GetDoubleBuffer()

Int_t TCanvas::GetDoubleBuffer ( ) const

inline

Definition at line 132 of file TCanvas.h.

GetEvent()

Int_t TCanvas::GetEvent ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 133 of file TCanvas.h.

GetEventX()

Int_t TCanvas::GetEventX ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 134 of file TCanvas.h.

GetEventY()

Int_t TCanvas::GetEventY ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 135 of file TCanvas.h.

GetHighLightColor()

Color_t TCanvas::GetHighLightColor ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 136 of file TCanvas.h.

GetPadSave()

TVirtualPad * TCanvas::GetPadSave ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 137 of file TCanvas.h.

GetSelected()

TObject * TCanvas::GetSelected ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 139 of file TCanvas.h.

GetSelectedOpt()

Option_t * TCanvas::GetSelectedOpt ( ) const

inline

Definition at line 143 of file TCanvas.h.

GetSelectedPad()

TVirtualPad * TCanvas::GetSelectedPad ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 144 of file TCanvas.h.

GetSelectedX()

Int_t TCanvas::GetSelectedX ( ) const

inline

Definition at line 141 of file TCanvas.h.

GetSelectedY()

Int_t TCanvas::GetSelectedY ( ) const

inline

Definition at line 142 of file TCanvas.h.

GetShowEditor()

Bool_t TCanvas::GetShowEditor ( ) const

inline

Definition at line 148 of file TCanvas.h.

GetShowEventStatus()

Bool_t TCanvas::GetShowEventStatus ( ) const

inline

Definition at line 146 of file TCanvas.h.

GetShowToolBar()

Bool_t TCanvas::GetShowToolBar ( ) const

inline

Definition at line 147 of file TCanvas.h.

GetShowToolTips()

Bool_t TCanvas::GetShowToolTips ( ) const

inline

Definition at line 149 of file TCanvas.h.

GetWh()

UInt_t TCanvas::GetWh ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 162 of file TCanvas.h.

GetWindowHeight()

UInt_t TCanvas::GetWindowHeight ( ) const

inline

Definition at line 160 of file TCanvas.h.

GetWindowTopX()

Int_t TCanvas::GetWindowTopX

(

)

Returns current top x position of window on screen.

Definition at line 1199 of file TCanvas.cxx.

GetWindowTopY()

Int_t TCanvas::GetWindowTopY

(

)

Returns current top y position of window on screen.

Definition at line 1210 of file TCanvas.cxx.

GetWindowWidth()

UInt_t TCanvas::GetWindowWidth ( ) const

inline

Definition at line 159 of file TCanvas.h.

GetWw()

UInt_t TCanvas::GetWw ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 161 of file TCanvas.h.

GetXsizeReal()

Size_t TCanvas::GetXsizeReal ( ) const

inline

Definition at line 153 of file TCanvas.h.

GetXsizeUser()

Size_t TCanvas::GetXsizeUser ( ) const

inline

Definition at line 151 of file TCanvas.h.

GetYsizeReal()

Size_t TCanvas::GetYsizeReal ( ) const

inline

Definition at line 154 of file TCanvas.h.

GetYsizeUser()

Size_t TCanvas::GetYsizeUser ( ) const

inline

Definition at line 152 of file TCanvas.h.

HandleInput()

void TCanvas::HandleInput ( EEventType  event, Int_t  px, Int_t  py  )

virtual

Handle Input Events.

Handle input events, like button up/down in current canvas.

Definition at line 1223 of file TCanvas.cxx.

HasMenuBar()

Bool_t TCanvas::HasMenuBar ( ) const

inline

Definition at line 166 of file TCanvas.h.

HighlightConnect()

void TCanvas::HighlightConnect ( const char *  slot )

virtual

This is "simplification" for function TCanvas::Connect with Highlighted signal for specific slot.

Slot has to be defined "UserFunction(TVirtualPad *pad, TObject *obj, Int_t x, Int_t y)" all parameters of UserFunction are taken from TCanvas::Highlighted

Definition at line 1631 of file TCanvas.cxx.

Highlighted()

void TCanvas::Highlighted ( TVirtualPad *  pad, TObject *  obj, Int_t  x, Int_t  y  )

virtual

Emit Highlighted() signal.

• pad is pointer to pad with highlighted histogram or graph
• obj is pointer to highlighted histogram or graph
• x is highlighted x bin for 1D histogram or highlighted x-th point for graph
• y is highlighted y bin for 2D histogram (for 1D histogram or graph not in use)

Definition at line 1612 of file TCanvas.cxx.

Iconify()

void TCanvas::Iconify

(

)

Iconify canvas.

Definition at line 1467 of file TCanvas.cxx.

Init()

void TCanvas::Init ( )

protected

Initialize the TCanvas members. Called by all constructors.

Definition at line 525 of file TCanvas.cxx.

IsBatch()

Bool_t TCanvas::IsBatch ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 169 of file TCanvas.h.

IsDrawn()

Bool_t TCanvas::IsDrawn ( )

inline

Definition at line 170 of file TCanvas.h.

IsFolder()

Bool_t TCanvas::IsFolder ( ) const

overridevirtual

Is folder ?

Reimplemented from TObject.

Definition at line 1476 of file TCanvas.cxx.

IsGrayscale()

Bool_t TCanvas::IsGrayscale

(

)

Check whether this canvas is to be drawn in grayscale mode.

Definition at line 2561 of file TCanvas.cxx.

IsRetained()

Bool_t TCanvas::IsRetained ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 173 of file TCanvas.h.

IsWeb()

Bool_t TCanvas::IsWeb

(

)

const

Is web canvas.

Definition at line 1484 of file TCanvas.cxx.

ls()

void TCanvas::ls ( Option_t *  option = "" ) const

overridevirtual

List all pads.

Implements TVirtualPad.

Definition at line 1492 of file TCanvas.cxx.

MakeDefCanvas()

TCanvas * TCanvas::MakeDefCanvas ( )

static

Static function to build a default canvas.

Definition at line 1504 of file TCanvas.cxx.

MoveOpaque()

void TCanvas::MoveOpaque

(

Int_t

set = 1

)

Set option to move objects/pads in a canvas.

• set = 1 (default) graphics objects are moved in opaque mode
• set = 0 only the outline of objects is drawn when moving them

The option opaque produces the best effect. It requires however a a reasonably fast workstation or response time.

Definition at line 1535 of file TCanvas.cxx.

OpaqueMoving()

Bool_t TCanvas::OpaqueMoving ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 177 of file TCanvas.h.

OpaqueResizing()

Bool_t TCanvas::OpaqueResizing ( ) const

inlineoverridevirtual

Implements TVirtualPad.

Definition at line 178 of file TCanvas.h.

operator=()

TCanvas & TCanvas::operator= ( const TCanvas &  rhs )

privatedelete

Paint()

void TCanvas::Paint ( Option_t *  option = "" )

overridevirtual

Paint canvas.

Implements TVirtualPad.

Definition at line 1543 of file TCanvas.cxx.

Pick() [1/2]

TPad * TCanvas::Pick ( Int_t  px, Int_t  py, TObject *  prevSelObj  )

virtual

Prepare for pick, call TPad::Pick() and when selected object is different from previous then emit Picked() signal.

Definition at line 1553 of file TCanvas.cxx.

Pick() [2/2]

TPad * TCanvas::Pick ( Int_t  px, Int_t  py, TObjLink *&  pickobj  )

inlineoverridevirtual

Search for an object at pixel position px,py.

Check if point is in this pad.

If yes, check if it is in one of the sub-pads

If found in the pad, compute closest distance of approach to each primitive.

If one distance of approach is found to be within the limit Distancemaximum the corresponding primitive is selected and the routine returns.

Reimplemented from TPad.

Definition at line 180 of file TCanvas.h.

Picked()

void TCanvas::Picked ( TPad *  selpad, TObject *  selected, Int_t  event  )

virtual

Emit Picked() signal.

Definition at line 1593 of file TCanvas.cxx.

ProcessedEvent()

void TCanvas::ProcessedEvent ( Int_t  event, Int_t  x, Int_t  y, TObject *  selected  )

virtual

Emit ProcessedEvent() signal.

Definition at line 1653 of file TCanvas.cxx.

RaiseWindow()

void TCanvas::RaiseWindow

(

)

Raise canvas window.

Definition at line 1747 of file TCanvas.cxx.

ResetDrawn()

void TCanvas::ResetDrawn ( )

inline

Definition at line 189 of file TCanvas.h.

Resize()

void TCanvas::Resize ( Option_t *  option = "" )

virtual

Recompute canvas parameters following a X11 Resize.

Definition at line 1668 of file TCanvas.cxx.

ResizeOpaque()

void TCanvas::ResizeOpaque

(

Int_t

set = 1

)

Set option to resize objects/pads in a canvas.

• set = 1 (default) graphics objects are resized in opaque mode
• set = 0 only the outline of objects is drawn when resizing them

The option opaque produces the best effect. It requires however a a reasonably fast workstation or response time.

Definition at line 1762 of file TCanvas.cxx.

RunAutoExec()

void TCanvas::RunAutoExec ( )

private

Execute the list of TExecs in the current pad.

Definition at line 1770 of file TCanvas.cxx.

SavePrimitive()

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

overridevirtual

Save primitives in this canvas in C++ macro file with GUI.

Reimplemented from TObject.

Definition at line 1781 of file TCanvas.cxx.

SaveSource()

void TCanvas::SaveSource	(	const char *	filename = "",
		Option_t *	option = ""
	)

Save primitives in this canvas as a C++ macro file.

This function loops on all the canvas primitives and for each primitive calls the object SavePrimitive function. When outputting floating point numbers, the default precision is 7 digits. The precision can be changed (via system.rootrc) by changing the value of the environment variable "Canvas.SavePrecision"

Definition at line 1826 of file TCanvas.cxx.

Selected()

void TCanvas::Selected ( TVirtualPad *  pad, TObject *  obj, Int_t  event  )

virtual

Emit Selected() signal.

Definition at line 1639 of file TCanvas.cxx.

SetBatch()

void TCanvas::SetBatch ( Bool_t  batch = kTRUE )

overridevirtual

Toggle batch mode.

However, if the canvas is created without a window then batch mode always stays set.

Implements TVirtualPad.

Definition at line 1974 of file TCanvas.cxx.

SetCanvasImp()

void TCanvas::SetCanvasImp ( TCanvasImp *  i )

inline

Definition at line 201 of file TCanvas.h.

SetCanvasSize()

void TCanvas::SetCanvasSize ( UInt_t  ww, UInt_t  wh  )

overridevirtual

Set Width and Height of canvas to ww and wh respectively.

If ww and/or wh are greater than the current canvas window a scroll bar is automatically generated. Use this function to zoom in a canvas and navigate via the scroll bars. The Width and Height in this method are different from those given in the TCanvas constructors where these two dimension include the size of the window decoration whereas they do not in this method.

Implements TVirtualPad.

Definition at line 1990 of file TCanvas.cxx.

SetClickSelected()

void TCanvas::SetClickSelected ( TObject *  obj )

inline

Definition at line 205 of file TCanvas.h.

SetClickSelectedPad()

void TCanvas::SetClickSelectedPad ( TPad *  pad )

inline

Definition at line 207 of file TCanvas.h.

SetCursor()

void TCanvas::SetCursor ( ECursor  cursor )

overridevirtual

Set cursor.

Implements TVirtualPad.

Definition at line 2006 of file TCanvas.cxx.

SetDoubleBuffer()

void TCanvas::SetDoubleBuffer ( Int_t  mode = 1 )

overridevirtual

Set Double Buffer On/Off.

Implements TVirtualPad.

Definition at line 2015 of file TCanvas.cxx.

SetFixedAspectRatio()

void TCanvas::SetFixedAspectRatio ( Bool_t  fixed = kTRUE )

overridevirtual

Fix canvas aspect ratio to current value if fixed is true.

Implements TVirtualPad.

Definition at line 2032 of file TCanvas.cxx.

SetFolder()

void TCanvas::SetFolder ( Bool_t  isfolder = kTRUE )

static

If isfolder=kTRUE, the canvas can be browsed like a folder by default a canvas is not browsable.

Definition at line 2054 of file TCanvas.cxx.

SetGrayscale()

void TCanvas::SetGrayscale

(

Bool_t

set = kTRUE

)

Set whether this canvas should be painted in grayscale, and re-paint it if necessary.

Definition at line 2570 of file TCanvas.cxx.

SetHighLightColor()

void TCanvas::SetHighLightColor ( Color_t  col )

inline

Definition at line 203 of file TCanvas.h.

SetName()

void TCanvas::SetName ( const char *  name = "" )

overridevirtual

Set canvas name. In case name is an empty string, a default name is set.

Implements TVirtualPad.

Reimplemented in TDialogCanvas.

Definition at line 2062 of file TCanvas.cxx.

SetPadSave()

void TCanvas::SetPadSave ( TPad *  pad )

inline

Definition at line 212 of file TCanvas.h.

SetRealAspectRatio()

bool TCanvas::SetRealAspectRatio

(

const Int_t

axis = 1

)

Function to resize a canvas so that the plot inside is shown in real aspect ratio.

Parameters

[in]

axis

1 for resizing horizontally (x-axis) in order to get real aspect ratio, 2 for the resizing vertically (y-axis)

Returns

false if error is encountered, true otherwise

hpxpy->Draw();
c1->SetRealAspectRatio();

• For defining the concept of real aspect ratio, it is assumed that x and y axes are in same units, e.g. both in MeV or both in ns.
• You can resize either the width of the canvas or the height, but not both at the same time
• Call this function AFTER drawing AND zooming (SetUserRange) your TGraph or Histogram, otherwise it cannot infer your actual axes lengths
• This function ensures that the TFrame has a real aspect ratio, this does not mean that the full pad (i.e. the canvas or png output) including margins has exactly the same ratio
• This function does not work if the canvas is divided in several subpads

Definition at line 2105 of file TCanvas.cxx.

SetRetained()

void TCanvas::SetRetained ( Bool_t  retained = kTRUE )

inline

Definition at line 214 of file TCanvas.h.

SetSelected()

void TCanvas::SetSelected ( TObject *  obj )

overridevirtual

Set selected canvas.

Implements TVirtualPad.

Definition at line 2172 of file TCanvas.cxx.

SetSelectedPad()

void TCanvas::SetSelectedPad ( TPad *  pad )

inline

Definition at line 206 of file TCanvas.h.

SetSupportGL()

void TCanvas::SetSupportGL ( Bool_t  support )

inline

Definition at line 224 of file TCanvas.h.

SetTitle()

void TCanvas::SetTitle ( const char *  title = "" )

overridevirtual

Set canvas title.

Implements TVirtualPad.

Definition at line 2181 of file TCanvas.cxx.

SetWindowPosition()

void TCanvas::SetWindowPosition	(	Int_t	x,
		Int_t	y
	)

Set canvas window position.

Definition at line 2190 of file TCanvas.cxx.

SetWindowSize()

void TCanvas::SetWindowSize	(	UInt_t	ww,
		UInt_t	wh
	)

Set canvas window size.

Definition at line 2199 of file TCanvas.cxx.

Show()

void TCanvas::Show

(

)

Show canvas.

Definition at line 2238 of file TCanvas.cxx.

Size()

void TCanvas::Size ( Float_t  xsize = 0, Float_t  ysize = 0  )

virtual

Set the canvas scale in centimeters.

This information is used by PostScript to set the page size.

Parameters

[in]	xsize	size of the canvas in centimeters along X
[in]	ysize	size of the canvas in centimeters along Y

if xsize and ysize are not equal to 0, then the scale factors will be computed to keep the ratio ysize/xsize independently of the canvas size (parts of the physical canvas will be unused).

if xsize = 0 and ysize is not zero, then xsize will be computed to fit to the current canvas scale. If the canvas is resized, a new value for xsize will be recomputed. In this case the aspect ratio is not preserved.

if both xsize = 0 and ysize = 0, then the scaling is automatic. the largest dimension will be allocated a size of 20 centimeters.

Definition at line 2227 of file TCanvas.cxx.

SupportAlpha()

Bool_t TCanvas::SupportAlpha ( )

static

Static function returning "true" if transparency is supported.

Definition at line 2489 of file TCanvas.cxx.

ToggleAutoExec()

void TCanvas::ToggleAutoExec ( )

virtual

Toggle pad auto execution of list of TExecs.

Definition at line 2435 of file TCanvas.cxx.

ToggleEditor()

void TCanvas::ToggleEditor ( )

virtual

Toggle editor.

Definition at line 2466 of file TCanvas.cxx.

ToggleEventStatus()

void TCanvas::ToggleEventStatus ( )

virtual

Toggle event statusbar.

Definition at line 2444 of file TCanvas.cxx.

ToggleToolBar()

void TCanvas::ToggleToolBar ( )

virtual

Toggle toolbar.

Definition at line 2455 of file TCanvas.cxx.

ToggleToolTips()

void TCanvas::ToggleToolTips ( )

virtual

Toggle tooltip display.

Definition at line 2477 of file TCanvas.cxx.

Update()

void TCanvas::Update ( )

overridevirtual

Update canvas pad buffers.

Implements TVirtualPad.

Definition at line 2502 of file TCanvas.cxx.

UseCurrentStyle()

void TCanvas::UseCurrentStyle ( )

overridevirtual

Force a copy of current style for all objects in canvas.

Reimplemented from TObject.

Definition at line 1174 of file TCanvas.cxx.

UseGL()

Bool_t TCanvas::UseGL ( ) const

inline

Definition at line 223 of file TCanvas.h.

Friends And Related Symbol Documentation

TCanvasImp

friend class TCanvasImp

friend

Definition at line 25 of file TCanvas.h.

TInterpreter

friend class TInterpreter

friend

Definition at line 27 of file TCanvas.h.

TThread

friend class TThread

friend

Definition at line 26 of file TCanvas.h.

Member Data Documentation

fBatch

Bool_t TCanvas::fBatch

protected

! True when in batchmode

Definition at line 58 of file TCanvas.h.

fCanvasID

Int_t TCanvas::fCanvasID

protected

! Canvas identifier

Definition at line 47 of file TCanvas.h.

fCanvasImp

TCanvasImp* TCanvas::fCanvasImp

protected

! Window system specific canvas implementation

Definition at line 56 of file TCanvas.h.

fCatt

TAttCanvas TCanvas::fCatt

protected

Canvas attributes.

Definition at line 30 of file TCanvas.h.

fCh

UInt_t TCanvas::fCh

protected

Height of the canvas along Y (pixels)

Definition at line 43 of file TCanvas.h.

fClickSelected

TObject* TCanvas::fClickSelected

protected

! Currently click-selected object

Definition at line 49 of file TCanvas.h.

fClickSelectedPad

TPad* TCanvas::fClickSelectedPad

protected

! Pad containing currently click-selected object

Definition at line 54 of file TCanvas.h.

fContextMenu

TContextMenu* TCanvas::fContextMenu

protected

! Context menu pointer

Definition at line 57 of file TCanvas.h.

fCw

UInt_t TCanvas::fCw

protected

Width of the canvas along X (pixels)

Definition at line 42 of file TCanvas.h.

fDISPLAY

TString TCanvas::fDISPLAY

protected

Name of destination screen.

Definition at line 31 of file TCanvas.h.

fDoubleBuffer

Int_t TCanvas::fDoubleBuffer

protected

Double buffer flag (0=off, 1=on)

Definition at line 37 of file TCanvas.h.

fDrawn

Bool_t TCanvas::fDrawn

protected

! Set to True when the Draw method is called

Definition at line 62 of file TCanvas.h.

fEvent

Int_t TCanvas::fEvent

protected

! Type of current or last handled event

Definition at line 44 of file TCanvas.h.

fEventX

Int_t TCanvas::fEventX

protected

! Last X mouse position in canvas

Definition at line 45 of file TCanvas.h.

fEventY

Int_t TCanvas::fEventY

protected

! Last Y mouse position in canvas

Definition at line 46 of file TCanvas.h.

fgIsFolder

Bool_t TCanvas::fgIsFolder = kFALSE

staticprotected

Indicates if canvas can be browsed as a folder.

Definition at line 66 of file TCanvas.h.

fHighLightColor

Color_t TCanvas::fHighLightColor

protected

Highlight color of active pad.

Definition at line 36 of file TCanvas.h.

fPadSave

TPad* TCanvas::fPadSave

protected

! Pointer to saved pad in HandleInput

Definition at line 55 of file TCanvas.h.

fPainter

TVirtualPadPainter* TCanvas::fPainter

protected

! Canvas (pad) painter.

Definition at line 64 of file TCanvas.h.

fRetained

Bool_t TCanvas::fRetained

protected

Retain structure flag.

Definition at line 60 of file TCanvas.h.

fSelected

TObject* TCanvas::fSelected

protected

! Currently selected object

Definition at line 48 of file TCanvas.h.

fSelectedOpt

TString TCanvas::fSelectedOpt

protected

! Drawing option of selected object

Definition at line 52 of file TCanvas.h.

fSelectedPad

TPad* TCanvas::fSelectedPad

protected

! Pad containing currently selected object

Definition at line 53 of file TCanvas.h.

fSelectedX

Int_t TCanvas::fSelectedX

protected

! X of selected object

Definition at line 50 of file TCanvas.h.

fSelectedY

Int_t TCanvas::fSelectedY

protected

! Y of selected object

Definition at line 51 of file TCanvas.h.

fUpdating

Bool_t TCanvas::fUpdating

protected

! True when Updating the canvas

Definition at line 59 of file TCanvas.h.

fUseGL

Bool_t TCanvas::fUseGL

protected

! True when rendering is with GL

Definition at line 61 of file TCanvas.h.

fWindowHeight

UInt_t TCanvas::fWindowHeight

protected

Height of window (including menubar, borders, etc.)

Definition at line 41 of file TCanvas.h.

fWindowTopX

Int_t TCanvas::fWindowTopX

protected

Top X position of window (in pixels)

Definition at line 38 of file TCanvas.h.

fWindowTopY

Int_t TCanvas::fWindowTopY

protected

Top Y position of window (in pixels)

Definition at line 39 of file TCanvas.h.

fWindowWidth

UInt_t TCanvas::fWindowWidth

protected

Width of window (including borders, etc.)

Definition at line 40 of file TCanvas.h.

fXsizeReal

Size_t TCanvas::fXsizeReal

protected

Current size of canvas along X in CM.

Definition at line 34 of file TCanvas.h.

fXsizeUser

Size_t TCanvas::fXsizeUser

protected

User specified size of canvas along X in CM.

Definition at line 32 of file TCanvas.h.

fYsizeReal

Size_t TCanvas::fYsizeReal

protected

Current size of canvas along Y in CM.

Definition at line 35 of file TCanvas.h.

fYsizeUser

Size_t TCanvas::fYsizeUser

protected

User specified size of canvas along Y in CM.

Definition at line 33 of file TCanvas.h.

Libraries for TCanvas:

---

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

• graf2d/gpad/inc/TCanvas.h
• graf2d/gpad/src/TCanvas.cxx