Idea Transcript
TCanvas Class Reference Graphics » 2D Graphics » Graphics pad
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, shrinked 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; TCanvas * c1 = 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. TCanvas *c1 = new TCanvas("c1","c1"); c1->SetCanvasSize(1500, 1500); c1->SetWindowSize(500, 500);
Definition at line 31 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 Public Types inherited from TObject
Public Member Functions TCanvas (Bool_t build=kTRUE)
Canvas default constructor. More... TCanvas (const char *name, const char *title="", Int_t form=1)
Create a new canvas with a predefined size form. More... TCanvas (const char *name, const char *title, Int_t ww, Int_t wh)
Create a new canvas at a random position. More... TCanvas (const char *name, const char *title, Int_t wtopx, Int_t wtopy, Int_t ww, Int_t wh)
Create a new canvas. More... TCanvas (const char *name, Int_t ww, Int_t wh, Int_t winid)
Create an embedded canvas, i.e. More... virtual ~TCanvas ()
Canvas destructor. More... virtual void Browse (TBrowser *b )
Browse. More... TVirtualPad * cd (Int_t subpadnumber=0)
Set current canvas & pad. More... void Clear (Option_t *option="")
Remove all primitives from the canvas. More... virtual void Cleared (TVirtualPad *pad)
Emit pad Cleared signal. More... void ClearPadSave ()
void Close (Option_t *option="")
Close canvas. More... virtual void Closed ()
Emit Closed signal. More... void Constructor ()
Canvas default constructor. More... void Constructor (const char *name, const char *title, Int_t form)
Create a new canvas with a predefined size form. More... void Constructor (const char *name, const char *title, Int_t ww, Int_t wh)
Create a new canvas at a random position. More... void Constructor (const char *name, const char *title, Int_t wtopx, Int_t wtopy, Int_t ww, Int_t wh)
Create a new canvas. More... virtual void Delete (Option_t *="")
Delete this object. More... void DeleteCanvasPainter ()
assert on IsBatch() == false? More... void Destructor ()
Actual canvas destructor. More... void DisconnectWidget ()
Used by friend class TCanvasImp. More... virtual void Draw (Option_t *option="")
Draw a canvas. More... virtual TObject * DrawClone (Option_t *option="") const
Draw a clone of this canvas A new canvas is created that is a clone of this canvas. More... 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. More...
virtual void EditorBar ()
Get editor bar. More... void EmbedInto (Int_t winid, Int_t ww, Int_t wh)
Embedded a canvas into a TRootEmbeddedCanvas. More... void EnterLeave (TPad *prevSelPad, TObject *prevSelObj)
Generate kMouseEnter and kMouseLeave events depending on the previously selected object and the currently selected object. More... void FeedbackMode (Bool_t set)
Turn rubberband feedback mode on or off. More... void Flush ()
Flush canvas buffers. More... void ForceUpdate ()
Bool_t GetAutoExec () const
Int_t GetCanvasID () const
Get canvas identifier. More... TCanvasImp * GetCanvasImp () const
Get canvas implementation pointer if any. More...
TVirtualPadPainter * GetCanvasPainter ()
Access and (probably) creation of pad painter. More... 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
Get Event. More... Int_t GetEventX () const
Get X event. More... Int_t GetEventY () const
Get Y event. More... Color_t GetHighLightColor () const
Get highlight color. More... TVirtualPad * GetPadSave () const
TObject * GetSelected () const
Get selected. More... Option_t * GetSelectedOpt () const
TVirtualPad * GetSelectedPad () const
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
Get Wh. More... UInt_t GetWindowHeight () const
Int_t GetWindowTopX ()
Returns current top x position of window on screen. More... Int_t GetWindowTopY ()
Returns current top y position of window on screen. More... UInt_t GetWindowWidth () const
UInt_t GetWw () const
Get Ww. More... 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. More... Bool_t HasMenuBar () const
void Iconify ()
Bool_t IsBatch () const
Is pad in batch mode ? More... Bool_t IsDrawn ()
Bool_t IsFolder () const
Is folder ? More... Bool_t IsGrayscale ()
Check whether this canvas is to be drawn in grayscale mode. More... Bool_t IsRetained () const
Is pad retained ? More... virtual void ls (Option_t *option="") const
List all pads. More... void MoveOpaque (Int_t set=1)
Set option to move objects/pads in a canvas. More... Bool_t OpaqueMoving () const
Is pad moving in opaque mode ? More... Bool_t OpaqueResizing () const
Is pad resizing in opaque mode ? More... virtual void Paint (Option_t *option="")
Paint canvas. More... virtual TPad * Pick (Int_t px, Int_t py, TObjLink *&pickobj)
Search for an object at pixel position px,py. More... 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. More... virtual void Picked (TPad *selpad, TObject *selected, Int_t event)
Emit Picked() signal. More... virtual void ProcessedEvent (Int_t event, Int_t x, Int_t y, TObject *selected)
Emit ProcessedEvent() signal. More... void RaiseWindow ()
void ResetDrawn ()
virtual void Resize (Option_t *option="")
Recompute canvas parameters following a X11 Resize. More... void ResizeOpaque (Int_t set=1)
Set option to resize objects/pads in a canvas. More... void SavePrimitive (std::ostream &out, Option_t *option="")
Save primitives in this canvas in C++ macro file with GUI. More... void SaveSource (const char *filename="", Option_t *option="")
Save primitives in this canvas as a C++ macro file. More... virtual void Selected (TVirtualPad *pad, TObject *obj, Int_t event)
Emit Selected() signal. More... void SetBatch (Bool_t batch=kTRUE)
Toggle batch mode. More... void SetCanvasImp (TCanvasImp *i)
void SetCanvasSize (UInt_t ww, UInt_t wh)
Set Width and Height of canvas to ww and wh respectively. More... void SetClickSelected (TObject *obj)
void SetClickSelectedPad (TPad *pad)
virtual void SetCursor (ECursor cursor)
Set cursor. More... virtual void SetDoubleBuffer (Int_t mode=1)
Set Double Buffer On/Off. More... virtual void SetFixedAspectRatio (Bool_t fixed=kTRUE)
Fix canvas aspect ratio to current value if fixed is true. More... void SetGrayscale (Bool_t set=kTRUE)
Set whether this canvas should be painted in grayscale, and re-paint it if necessary. More... void SetHighLightColor (Color_t col)
void SetPadSave (TPad *pad)
void SetRetained (Bool_t retained=kTRUE)
void SetSelected (TObject *obj)
Set selected canvas. More... void SetSelectedPad (TPad *pad)
void SetSupportGL (Bool_t support)
void SetTitle (const char *title="")
Set canvas title. More... void SetWindowPosition (Int_t x, Int_t y)
void SetWindowSize (UInt_t ww, UInt_t wh)
void Show ()
virtual void Size (Float_t xsizeuser=0, Float_t ysizeuser=0)
Set the canvas scale in centimeters. More... virtual void ToggleAutoExec ()
Toggle pad auto execution of list of TExecs. More... virtual void ToggleEditor ()
Toggle editor. More... virtual void ToggleEventStatus ()
Toggle event statusbar. More... virtual void ToggleToolBar ()
Toggle toolbar. More... virtual void ToggleToolTips ()
Toggle tooltip display. More... virtual void Update ()
Update canvas pad buffers. More... void UseCurrentStyle ()
Force a copy of current style for all objects in canvas. More... Bool_t UseGL () const
Public Member Functions inherited from TPad Public Member Functions inherited from TVirtualPad Public Member Functions inherited from TObject Public Member Functions inherited from TAttLine Public Member Functions inherited from TAttFill Public Member Functions inherited from TAttPad Public Member Functions inherited from TQObject Public Member Functions inherited from TAttBBox2D
Static Public Member Functions static TCanvas * MakeDefCanvas ()
Static function to build a default canvas. More... 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. More... static Bool_t SupportAlpha ()
Static function returning "true" if transparency is supported. More... Static Public Member Functions inherited from TPad Static Public Member Functions inherited from TVirtualPad Static Public Member Functions inherited from TObject Static Public Member Functions inherited from TQObject
Protected Member Functions virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
Execute action corresponding to one event. More... void Init ()
Initialize the TCanvas members. Called by all constructors. More... Protected Member Functions inherited from TPad Protected Member Functions inherited from TVirtualPad Protected Member Functions inherited from TObject Protected Member Functions inherited from TQObject
Protected Attributes Bool_t fBatch
! True when in batchmode More... Int_t fCanvasID
! Canvas identifier More... TCanvasImp * fCanvasImp
! Window system specific canvas implementation More... TAttCanvas fCatt
Canvas attributes. More... UInt_t fCh
Height of the canvas along Y (pixels) More... TObject * fClickSelected
! Currently click-selected object More... TPad * fClickSelectedPad
! Pad containing currently click-selected object More... TContextMenu * fContextMenu
! Context menu pointer More... UInt_t fCw
Width of the canvas along X (pixels) More... TString fDISPLAY
Name of destination screen. More... Int_t fDoubleBuffer
Double buffer flag (0=off, 1=on) More... Bool_t fDrawn
! Set to True when the Draw method is called More... Int_t fEvent
! Type of current or last handled event More... Int_t fEventX
! Last X mouse position in canvas More... Int_t fEventY
! Last Y mouse position in canvas More... Color_t fHighLightColor
Highlight color of active pad. More... TPad * fPadSave
! Pointer to saved pad in HandleInput More...
TVirtualPadPainter * fPainter
! Canvas (pad) painter. More... Bool_t fRetained
Retain structure flag. More... TObject * fSelected
! Currently selected object More... TString fSelectedOpt
! Drawing option of selected object More... TPad * fSelectedPad
! Pad containing currently selected object More... Int_t fSelectedX
! X of selected object More... Int_t fSelectedY
! Y of selected object More... Bool_t fUpdating
! True when Updating the canvas More... Bool_t fUseGL
! True when rendering is with GL More... UInt_t fWindowHeight
Height of window (including menubar, borders, etc.) More... Int_t fWindowTopX
Top X position of window (in pixels) More... Int_t fWindowTopY
Top Y position of window (in pixels) More... UInt_t fWindowWidth
Width of window (including borders, etc.) More... Size_t fXsizeReal
Current size of canvas along X in CM. More... Size_t fXsizeUser
User specified size of canvas along X in CM. More... Size_t fYsizeReal
Current size of canvas along Y in CM. More... Size_t fYsizeUser
User specified size of canvas along Y in CM. More... Protected Attributes inherited from TPad Protected Attributes inherited from TVirtualPad Protected Attributes inherited from TAttLine Protected Attributes inherited from TAttFill Protected Attributes inherited from TAttPad Protected Attributes inherited from TQObject
Static Protected Attributes static Bool_t fgIsFolder = kFALSE
Indicates if canvas can be browsed as a folder. More... Static Protected Attributes inherited from TPad Static Protected Attributes inherited from TQObject
Private Member Functions TCanvas (const TCanvas &canvas)
void Build ()
Build a canvas. Called by all constructors. More... void CopyPixmaps ()
Copy the canvas pixmap of the pad to the canvas. More... void CreatePainter ()
Probably, TPadPainter must be placed in a separate ROOT module - "padpainter" (the same as "histpainter"). More... void DrawEventStatus (Int_t event, Int_t x, Int_t y, TObject *selected)
Report name and title of primitive below the cursor. More...
TCanvas & operator= (const TCanvas &rhs) void RunAutoExec ()
Execute the list of TExecs in the current pad. More...
Friends
class TCanvasImp class TInterpreter class TThread
Additional Inherited Members Static Protected Member Functions inherited from TQObject #include Inheritance diagram for TCanvas: TObject
TAttLine
TAttFill
TAttPad
TVirtualPad
TQObject
TAttBBox2D
TPad
TCanvas
TDialogCanvas
TInspectCanvas
[legend]
Member Enumeration Documentation u anonymous enum anonymous enum Enumerator
kShowEventStatus kAutoExec kMenuBar kShowToolBar kShowEditor kMoveOpaque kResizeOpaque kIsGrayscale kShowToolTips Definition at line 94 of file TCanvas.h.
Constructor & Destructor Documentation u TCanvas() [1/6] TCanvas::TCanvas ( const TCanvas & canvas )
private
u TCanvas() [2/6] TCanvas::TCanvas ( Bool_t build = kTRUE ) Canvas default constructor. Definition at line 119 of file TCanvas.cxx.
u 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 250 of file TCanvas.cxx.
u 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 353 of file TCanvas.cxx.
u 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 435 of file TCanvas.cxx.
u 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 204 of file TCanvas.cxx.
u ~TCanvas() TCanvas::~TCanvas ( )
virtual
Canvas destructor. Definition at line 646 of file TCanvas.cxx.
Member Function Documentation u Browse() void TCanvas::Browse ( TBrowser * b )
virtual
Browse. Reimplemented from TPad. Definition at line 654 of file TCanvas.cxx.
u Build() void TCanvas::Build ( )
private
Build a canvas. Called by all constructors. Definition at line 561 of file TCanvas.cxx.
u cd() TVirtualPad * TCanvas::cd ( Int_t subpadnumber = 0 )
virtual
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 688 of file TCanvas.cxx.
u Clear() void TCanvas::Clear ( Option_t * option = "" )
virtual
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 707 of file TCanvas.cxx.
u Cleared() void TCanvas::Cleared ( TVirtualPad * pad )
virtual
Emit pad Cleared signal. Definition at line 740 of file TCanvas.cxx.
u ClearPadSave() void TCanvas::ClearPadSave ( )
inline
Definition at line 146 of file TCanvas.h.
u Close() void TCanvas::Close ( Option_t * option = "" )
virtual
Close canvas. Delete window/pads data structure Reimplemented from TPad. Definition at line 758 of file TCanvas.cxx.
u Closed() void TCanvas::Closed ( )
virtual
Emit Closed signal. Reimplemented from TPad. Definition at line 748 of file TCanvas.cxx.
u Constructor() [1/4] void TCanvas::Constructor ( ) Canvas default constructor. Definition at line 172 of file TCanvas.cxx.
u 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 268 of file TCanvas.cxx.
u Constructor() [3/4] 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 370 of file TCanvas.cxx.
u Constructor() [4/4] 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 454 of file TCanvas.cxx.
u CopyPixmaps() void TCanvas::CopyPixmaps ( )
private
virtual
Copy the canvas pixmap of the pad to the canvas. Reimplemented from TPad. Definition at line 808 of file TCanvas.cxx.
u 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 2330 of file TCanvas.cxx.
u Delete() virtual void TCanvas::Delete ( Option_t * option = "" )
inline
virtual
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 126 of file TCanvas.h.
u DeleteCanvasPainter() void TCanvas::DeleteCanvasPainter ( ) assert on IsBatch() == false? Definition at line 2361 of file TCanvas.cxx.
u Destructor() void TCanvas::Destructor ( ) Actual canvas destructor. Definition at line 664 of file TCanvas.cxx.
u DisconnectWidget() void TCanvas::DisconnectWidget ( ) Used by friend class TCanvasImp. Definition at line 2298 of file TCanvas.cxx.
u Draw() void TCanvas::Draw ( Option_t * option = "" )
virtual
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();
Reimplemented from TPad. Definition at line 826 of file TCanvas.cxx.
u DrawClone() TObject * TCanvas::DrawClone ( Option_t * option = "" ) const
virtual
Draw a clone of this canvas A new canvas is created that is a clone of this canvas. Reimplemented from TObject. Definition at line 873 of file TCanvas.cxx.
u 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 899 of file TCanvas.cxx.
u 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 954 of file TCanvas.cxx.
u EditorBar() void TCanvas::EditorBar ( )
virtual
Get editor bar. Definition at line 981 of file TCanvas.cxx.
u 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 990 of file TCanvas.cxx.
u 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 1016 of file TCanvas.cxx.
u ExecuteEvent() void TCanvas::ExecuteEvent ( Int_t event, Int_t px, Int_t py )
protected
virtual
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 TPad. Definition at line 1053 of file TCanvas.cxx.
u FeedbackMode() void TCanvas::FeedbackMode ( Bool_t set ) Turn rubberband feedback mode on or off. Definition at line 1071 of file TCanvas.cxx.
u Flush() void TCanvas::Flush ( ) Flush canvas buffers. Definition at line 1085 of file TCanvas.cxx.
u ForceUpdate() void TCanvas::ForceUpdate ( )
inline
Definition at line 137 of file TCanvas.h.
u GetAutoExec() Bool_t TCanvas::GetAutoExec ( ) const
inline
Definition at line 158 of file TCanvas.h.
u GetCanvasID() Int_t TCanvas::GetCanvasID ( ) const
inline
virtual
inline
virtual
inline
virtual
Get canvas identifier. Reimplemented from TPad. Definition at line 163 of file TCanvas.h.
u GetCanvasImp() TCanvasImp * TCanvas::GetCanvasImp ( ) const Get canvas implementation pointer if any. Reimplemented from TPad. Definition at line 164 of file TCanvas.h.
u GetCanvasPainter() TVirtualPadPainter * TCanvas::GetCanvasPainter ( ) Access and (probably) creation of pad painter. Definition at line 2351 of file TCanvas.cxx.
u GetCanvasPar() virtual void TCanvas::GetCanvasPar ( Int_t &
wtopx,
Int_t &
wtopy,
UInt_t & ww, UInt_t & wh ) Definition at line 171 of file TCanvas.h.
u GetClickSelected() TObject* TCanvas::GetClickSelected ( ) const
inline
Definition at line 148 of file TCanvas.h.
u GetClickSelectedPad() TVirtualPad * TCanvas::GetClickSelectedPad ( ) const
inline
Definition at line 153 of file TCanvas.h.
u GetContextMenu() TContextMenu * TCanvas::GetContextMenu ( ) const
inline
Definition at line 139 of file TCanvas.h.
u GetDISPLAY() const char* TCanvas::GetDISPLAY ( ) const
inline
Definition at line 138 of file TCanvas.h.
u GetDoubleBuffer() Int_t TCanvas::GetDoubleBuffer ( ) const
inline
Definition at line 140 of file TCanvas.h.
u GetEvent() Int_t TCanvas::GetEvent ( ) const
inline
virtual
inline
virtual
inline
virtual
inline
virtual
inline
virtual
inline
virtual
Get Event. Reimplemented from TPad. Definition at line 141 of file TCanvas.h.
u GetEventX() Int_t TCanvas::GetEventX ( ) const Get X event. Reimplemented from TPad. Definition at line 142 of file TCanvas.h.
u GetEventY() Int_t TCanvas::GetEventY ( ) const Get Y event. Reimplemented from TPad. Definition at line 143 of file TCanvas.h.
u GetHighLightColor() Color_t TCanvas::GetHighLightColor ( ) const Get highlight color. Reimplemented from TPad. Definition at line 144 of file TCanvas.h.
u GetPadSave() TVirtualPad * TCanvas::GetPadSave ( ) const Implements TVirtualPad. Definition at line 145 of file TCanvas.h.
u GetSelected() TObject* TCanvas::GetSelected ( ) const Get selected. Reimplemented from TPad. Definition at line 147 of file TCanvas.h.
u GetSelectedOpt() Option_t* TCanvas::GetSelectedOpt ( ) const
inline
Definition at line 151 of file TCanvas.h.
u GetSelectedPad() TVirtualPad * TCanvas::GetSelectedPad ( ) const
inline
virtual
Implements TVirtualPad. Definition at line 152 of file TCanvas.h.
u GetSelectedX() Int_t TCanvas::GetSelectedX ( ) const
inline
Definition at line 149 of file TCanvas.h.
u GetSelectedY() Int_t TCanvas::GetSelectedY ( ) const
inline
Definition at line 150 of file TCanvas.h.
u GetShowEditor() Bool_t TCanvas::GetShowEditor ( ) const
inline
Definition at line 156 of file TCanvas.h.
u GetShowEventStatus() Bool_t TCanvas::GetShowEventStatus ( ) const
inline
Definition at line 154 of file TCanvas.h.
u GetShowToolBar() Bool_t TCanvas::GetShowToolBar ( ) const
inline
Definition at line 155 of file TCanvas.h.
u GetShowToolTips() Bool_t TCanvas::GetShowToolTips ( ) const
inline
Definition at line 157 of file TCanvas.h.
u GetWh() UInt_t TCanvas::GetWh ( ) const
inline
virtual
Get Wh. Reimplemented from TPad. Definition at line 170 of file TCanvas.h.
u GetWindowHeight() UInt_t TCanvas::GetWindowHeight ( ) const
inline
Definition at line 168 of file TCanvas.h.
u GetWindowTopX() Int_t TCanvas::GetWindowTopX ( ) Returns current top x position of window on screen. Definition at line 1144 of file TCanvas.cxx.
u GetWindowTopY() Int_t TCanvas::GetWindowTopY ( ) Returns current top y position of window on screen. Definition at line 1155 of file TCanvas.cxx.
u GetWindowWidth() UInt_t TCanvas::GetWindowWidth ( ) const
inline
Definition at line 167 of file TCanvas.h.
u GetWw() UInt_t TCanvas::GetWw ( ) const
inline
virtual
Get Ww. Reimplemented from TPad. Definition at line 169 of file TCanvas.h.
u GetXsizeReal() Size_t TCanvas::GetXsizeReal ( ) const
inline
Definition at line 161 of file TCanvas.h.
u GetXsizeUser() Size_t TCanvas::GetXsizeUser ( ) const
inline
Definition at line 159 of file TCanvas.h.
u GetYsizeReal() Size_t TCanvas::GetYsizeReal ( ) const
inline
Definition at line 162 of file TCanvas.h.
u GetYsizeUser() Size_t TCanvas::GetYsizeUser ( ) const
inline
Definition at line 160 of file TCanvas.h.
u 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 1168 of file TCanvas.cxx.
u HasMenuBar() Bool_t TCanvas::HasMenuBar ( ) const
inline
Definition at line 174 of file TCanvas.h.
u Iconify() void TCanvas::Iconify ( )
inline
Definition at line 175 of file TCanvas.h.
u Init() void TCanvas::Init ( )
protected
Initialize the TCanvas members. Called by all constructors. Definition at line 512 of file TCanvas.cxx.
u IsBatch() Bool_t TCanvas::IsBatch ( ) const
inline
virtual
Is pad in batch mode ? Reimplemented from TPad. Definition at line 176 of file TCanvas.h.
u IsDrawn() Bool_t TCanvas::IsDrawn ( )
inline
Definition at line 177 of file TCanvas.h.
u IsFolder() Bool_t TCanvas::IsFolder ( ) const
virtual
Is folder ? Reimplemented from TObject. Definition at line 1412 of file TCanvas.cxx.
u IsGrayscale() Bool_t TCanvas::IsGrayscale ( ) Check whether this canvas is to be drawn in grayscale mode. Definition at line 2307 of file TCanvas.cxx.
u IsRetained() Bool_t TCanvas::IsRetained ( ) const
inline
virtual
Is pad retained ? Reimplemented from TPad. Definition at line 180 of file TCanvas.h.
u ls() void TCanvas::ls ( Option_t * option = "" ) const
virtual
List all pads. Reimplemented from TPad. Definition at line 1420 of file TCanvas.cxx.
u MakeDefCanvas() TCanvas * TCanvas::MakeDefCanvas ( )
static
Static function to build a default canvas. Definition at line 1432 of file TCanvas.cxx.
u 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 1463 of file TCanvas.cxx.
u OpaqueMoving() Bool_t TCanvas::OpaqueMoving ( ) const
inline
virtual
inline
virtual
Is pad moving in opaque mode ? Reimplemented from TPad. Definition at line 183 of file TCanvas.h.
u OpaqueResizing() Bool_t TCanvas::OpaqueResizing ( ) const Is pad resizing in opaque mode ? Reimplemented from TPad. Definition at line 184 of file TCanvas.h.
u operator=() TCanvas& TCanvas::operator= ( const TCanvas & rhs )
private
u Paint() void TCanvas::Paint ( Option_t * option = "" )
virtual
Paint canvas. Reimplemented from TPad. Definition at line 1471 of file TCanvas.cxx.
u Pick() [1/2] virtual TPad * TCanvas::Pick ( Int_t
px,
Int_t
py,
TObjLink *& pickobj )
inline
virtual
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 186 of file TCanvas.h.
u Pick() [2/2] 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 1480 of file TCanvas.cxx.
u Picked() void TCanvas::Picked ( TPad *
selpad,
TObject * selected, Int_t
event
)
virtual
Emit Picked() signal. Definition at line 1520 of file TCanvas.cxx.
u ProcessedEvent() void TCanvas::ProcessedEvent ( Int_t
event,
Int_t
x,
Int_t
y,
TObject * selected )
virtual
Emit ProcessedEvent() signal. Definition at line 1548 of file TCanvas.cxx.
u RaiseWindow() void TCanvas::RaiseWindow ( )
inline
Definition at line 193 of file TCanvas.h.
u ResetDrawn() void TCanvas::ResetDrawn ( )
inline
Definition at line 194 of file TCanvas.h.
u Resize() void TCanvas::Resize ( Option_t * option = "" )
virtual
Recompute canvas parameters following a X11 Resize. Definition at line 1563 of file TCanvas.cxx.
u 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 1647 of file TCanvas.cxx.
u RunAutoExec() void TCanvas::RunAutoExec ( )
private
Execute the list of TExecs in the current pad. Definition at line 1655 of file TCanvas.cxx.
u SavePrimitive() void TCanvas::SavePrimitive ( std::ostream & out, Option_t *
option = ""
)
virtual
Save primitives in this canvas in C++ macro file with GUI. Reimplemented from TPad. Definition at line 1666 of file TCanvas.cxx.
u 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 1711 of file TCanvas.cxx.
u Selected() void TCanvas::Selected ( TVirtualPad * pad, TObject *
obj,
Int_t
event
)
virtual
Emit Selected() signal. Definition at line 1534 of file TCanvas.cxx.
u SetBatch() void TCanvas::SetBatch ( Bool_t batch = kTRUE )
virtual
Toggle batch mode. However, if the canvas is created without a window then batch mode always stays set. Reimplemented from TPad. Definition at line 1862 of file TCanvas.cxx.
u SetCanvasImp() void TCanvas::SetCanvasImp ( TCanvasImp * i )
inline
Definition at line 211 of file TCanvas.h.
u SetCanvasSize() void TCanvas::SetCanvasSize ( UInt_t ww, UInt_t wh )
virtual
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. Reimplemented from TPad. Definition at line 1878 of file TCanvas.cxx.
u SetClickSelected() void TCanvas::SetClickSelected ( TObject * obj )
inline
Definition at line 215 of file TCanvas.h.
u SetClickSelectedPad() void TCanvas::SetClickSelectedPad ( TPad * pad )
inline
Definition at line 217 of file TCanvas.h.
u SetCursor() void TCanvas::SetCursor ( ECursor cursor )
virtual
Set cursor. Reimplemented from TPad. Definition at line 1891 of file TCanvas.cxx.
u SetDoubleBuffer() void TCanvas::SetDoubleBuffer ( Int_t mode = 1 )
virtual
Set Double Buffer On/Off. Reimplemented from TPad. Definition at line 1900 of file TCanvas.cxx.
u SetFixedAspectRatio() void TCanvas::SetFixedAspectRatio ( Bool_t fixed = kTRUE )
virtual
Fix canvas aspect ratio to current value if fixed is true. Reimplemented from TPad. Definition at line 1917 of file TCanvas.cxx.
u 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 1939 of file TCanvas.cxx.
u 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 2316 of file TCanvas.cxx.
u SetHighLightColor() void TCanvas::SetHighLightColor ( Color_t col )
inline
Definition at line 213 of file TCanvas.h.
u SetPadSave() void TCanvas::SetPadSave ( TPad * pad )
inline
Definition at line 222 of file TCanvas.h.
u SetRetained() void TCanvas::SetRetained ( Bool_t retained = kTRUE )
inline
Definition at line 223 of file TCanvas.h.
u SetSelected() void TCanvas::SetSelected ( TObject * obj )
virtual
Set selected canvas. Reimplemented from TPad. Definition at line 1947 of file TCanvas.cxx.
u SetSelectedPad() void TCanvas::SetSelectedPad ( TPad * pad )
inline
Definition at line 216 of file TCanvas.h.
u SetSupportGL() void TCanvas::SetSupportGL ( Bool_t support )
inline
Definition at line 233 of file TCanvas.h.
u SetTitle() void TCanvas::SetTitle ( const char * title = "" )
virtual
Set canvas title. Reimplemented from TPad. Definition at line 1956 of file TCanvas.cxx.
u SetWindowPosition() void TCanvas::SetWindowPosition ( Int_t x, Int_t y )
inline
Definition at line 203 of file TCanvas.h.
u SetWindowSize() void TCanvas::SetWindowSize ( UInt_t ww, UInt_t wh )
inline
Definition at line 204 of file TCanvas.h.
u Show() void TCanvas::Show ( )
inline
Definition at line 218 of file TCanvas.h.
u 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 1982 of file TCanvas.cxx.
u SupportAlpha() Bool_t TCanvas::SupportAlpha ( )
static
Static function returning "true" if transparency is supported. Definition at line 2235 of file TCanvas.cxx.
u ToggleAutoExec() void TCanvas::ToggleAutoExec ( )
virtual
Toggle pad auto execution of list of TExecs. Definition at line 2181 of file TCanvas.cxx.
u ToggleEditor() void TCanvas::ToggleEditor ( )
virtual
Toggle editor. Definition at line 2212 of file TCanvas.cxx.
u ToggleEventStatus() void TCanvas::ToggleEventStatus ( )
virtual
Toggle event statusbar. Definition at line 2190 of file TCanvas.cxx.
u ToggleToolBar() void TCanvas::ToggleToolBar ( )
virtual
Toggle toolbar. Definition at line 2201 of file TCanvas.cxx.
u ToggleToolTips() void TCanvas::ToggleToolTips ( )
virtual
Toggle tooltip display. Definition at line 2223 of file TCanvas.cxx.
u Update() void TCanvas::Update ( )
virtual
Update canvas pad buffers. Reimplemented from TPad. Definition at line 2248 of file TCanvas.cxx.
u UseCurrentStyle() void TCanvas::UseCurrentStyle ( )
virtual
Force a copy of current style for all objects in canvas. Reimplemented from TPad. Definition at line 1119 of file TCanvas.cxx.
u UseGL() Bool_t TCanvas::UseGL ( ) const
inline
Definition at line 232 of file TCanvas.h.
Friends And Related Function Documentation u TCanvasImp friend class TCanvasImp
friend
Definition at line 33 of file TCanvas.h.
u TInterpreter friend class TInterpreter
friend
Definition at line 35 of file TCanvas.h.
u TThread friend class TThread
friend
Definition at line 34 of file TCanvas.h.
Member Data Documentation u fBatch Bool_t TCanvas::fBatch
protected
! True when in batchmode Definition at line 66 of file TCanvas.h.
u fCanvasID Int_t TCanvas::fCanvasID
protected
! Canvas identifier Definition at line 55 of file TCanvas.h.
u fCanvasImp TCanvasImp * TCanvas::fCanvasImp
protected
! Window system specific canvas implementation Definition at line 64 of file TCanvas.h.
u fCatt TAttCanvas TCanvas::fCatt
protected
Canvas attributes. Definition at line 38 of file TCanvas.h.
u fCh UInt_t TCanvas::fCh
protected
Height of the canvas along Y (pixels) Definition at line 51 of file TCanvas.h.
u fClickSelected TObject* TCanvas::fClickSelected
protected
! Currently click-selected object Definition at line 57 of file TCanvas.h.
u fClickSelectedPad TPad * TCanvas::fClickSelectedPad
protected
! Pad containing currently click-selected object Definition at line 62 of file TCanvas.h.
u fContextMenu TContextMenu * TCanvas::fContextMenu
protected
! Context menu pointer Definition at line 65 of file TCanvas.h.
u fCw UInt_t TCanvas::fCw
protected
Width of the canvas along X (pixels) Definition at line 50 of file TCanvas.h.
u fDISPLAY TString TCanvas::fDISPLAY
protected
Name of destination screen. Definition at line 39 of file TCanvas.h.
u fDoubleBuffer Int_t TCanvas::fDoubleBuffer
protected
Double buffer flag (0=off, 1=on) Definition at line 45 of file TCanvas.h.
u fDrawn Bool_t TCanvas::fDrawn
protected
! Set to True when the Draw method is called Definition at line 70 of file TCanvas.h.
u fEvent Int_t TCanvas::fEvent
protected
! Type of current or last handled event Definition at line 52 of file TCanvas.h.
u fEventX Int_t TCanvas::fEventX
protected
! Last X mouse position in canvas Definition at line 53 of file TCanvas.h.
u fEventY Int_t TCanvas::fEventY
protected
! Last Y mouse position in canvas Definition at line 54 of file TCanvas.h.
u fgIsFolder Bool_t TCanvas::fgIsFolder = kFALSE
static
protected
Indicates if canvas can be browsed as a folder. Definition at line 74 of file TCanvas.h.
u fHighLightColor Color_t TCanvas::fHighLightColor
protected
Highlight color of active pad. Definition at line 44 of file TCanvas.h.
u fPadSave TPad * TCanvas::fPadSave
protected
! Pointer to saved pad in HandleInput Definition at line 63 of file TCanvas.h.
u fPainter TVirtualPadPainter* TCanvas::fPainter
protected
! Canvas (pad) painter. Definition at line 72 of file TCanvas.h.
u fRetained Bool_t TCanvas::fRetained
protected
Retain structure flag. Definition at line 68 of file TCanvas.h.
u fSelected TObject* TCanvas::fSelected
protected
! Currently selected object Definition at line 56 of file TCanvas.h.
u fSelectedOpt TString TCanvas::fSelectedOpt
protected
! Drawing option of selected object Definition at line 60 of file TCanvas.h.
u fSelectedPad TPad * TCanvas::fSelectedPad
protected
! Pad containing currently selected object Definition at line 61 of file TCanvas.h.
u fSelectedX Int_t TCanvas::fSelectedX
protected
! X of selected object Definition at line 58 of file TCanvas.h.
u fSelectedY Int_t TCanvas::fSelectedY
protected
! Y of selected object Definition at line 59 of file TCanvas.h.
u fUpdating Bool_t TCanvas::fUpdating
protected
! True when Updating the canvas Definition at line 67 of file TCanvas.h.
u fUseGL Bool_t TCanvas::fUseGL
protected
! True when rendering is with GL Definition at line 69 of file TCanvas.h.
u fWindowHeight UInt_t TCanvas::fWindowHeight
protected
Height of window (including menubar, borders, etc.) Definition at line 49 of file TCanvas.h.
u fWindowTopX Int_t TCanvas::fWindowTopX
protected
Top X position of window (in pixels) Definition at line 46 of file TCanvas.h.
u fWindowTopY Int_t TCanvas::fWindowTopY
protected
Top Y position of window (in pixels) Definition at line 47 of file TCanvas.h.
u fWindowWidth UInt_t TCanvas::fWindowWidth
protected
Width of window (including borders, etc.) Definition at line 48 of file TCanvas.h.
u fXsizeReal Size_t TCanvas::fXsizeReal
protected
Current size of canvas along X in CM. Definition at line 42 of file TCanvas.h.
u fXsizeUser Size_t TCanvas::fXsizeUser
protected
User specified size of canvas along X in CM. Definition at line 40 of file TCanvas.h.
u fYsizeReal Size_t TCanvas::fYsizeReal
protected
Current size of canvas along Y in CM. Definition at line 43 of file TCanvas.h.
u fYsizeUser Size_t TCanvas::fYsizeUser
protected
User specified size of canvas along Y in CM. Definition at line 41 of file TCanvas.h. Libraries for TCanvas: libGraf
libHist
libMathCore
libCore libGpad libRIO
libMatrix
libImt
libThread [legend]
The documentation for this class was generated from the following files: graf2d/gpad/inc/TCanvas.h graf2d/gpad/src/TCanvas.cxx Loading [MathJax]/extensions/tex2jax.js ROOT 6.13/01 - Reference Guide Generated on Tue Mar 13 2018 03:18:33 (GVA Time) using Doxygen 1.8.13.