library: libGui
#include "TGCanvas.h"

TGCanvas


class description - header file - source file
viewCVS header - viewCVS source

class TGCanvas: public TGFrame

Inheritance Inherited Members Includes Libraries
Class Charts

Function Members (Methods)

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public:
TGCanvas(const TGWindow* p = 0, UInt_t w = 1, UInt_t h = 1, UInt_t options = kSunkenFrame|kDoubleBorder, Pixel_t back = GetDefaultFrameBackground())
virtual~TGCanvas()
voidTObject::AbstractMethod(const char* method) const
virtual voidTGFrame::Activate(Bool_t)
virtual voidAddFrame(TGFrame* f, TGLayoutHints* l = 0)
voidTGFrame::AddInput(UInt_t emask)
virtual voidTObject::AppendPad(Option_t* option = "")
virtual voidTObject::Browse(TBrowser* b)
virtual voidTGFrame::ChangeBackground(Pixel_t back)
virtual voidTQObject::ChangedBy(const char* method)
virtual voidTGFrame::ChangeOptions(UInt_t options)
static TClass*Class()
virtual const char*TObject::ClassName() const
virtual voidTObject::Clear(Option_t* = "")
virtual TObject*TObject::Clone(const char* newname = "") const
virtual Int_tTObject::Compare(const TObject* obj) const
Bool_tTQObject::Connect(const char* signal, const char* receiver_class, void* receiver, const char* slot)
static Bool_tTQObject::Connect(TQObject* sender, const char* signal, const char* receiver_class, void* receiver, const char* slot)
static Bool_tTQObject::Connect(const char* sender_class, const char* signal, const char* receiver_class, void* receiver, const char* slot)
virtual voidTQObject::Connected(const char*)
Bool_tTGFrame::Contains(Int_t x, Int_t y) const
virtual voidTObject::Copy(TObject& object) const
virtual voidTGFrame::Delete(Option_t* = "")
virtual voidTGFrame::DeleteWindow()
virtual voidTQObject::Destroyed()
virtual voidTGWindow::DestroySubwindows()
virtual voidTGWindow::DestroyWindow()
Bool_tTQObject::Disconnect(const char* signal = "0", void* receiver = 0, const char* slot = "0")
static Bool_tTQObject::Disconnect(TQObject* sender, const char* signal = "0", void* receiver = 0, const char* slot = "0")
static Bool_tTQObject::Disconnect(const char* class_name, const char* signal, void* receiver = 0, const char* slot = "0")
virtual voidTQObject::Disconnected(const char*)
virtual Int_tTObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual voidTObject::Draw(Option_t* option = "")
virtual voidDrawBorder()
virtual voidTGFrame::DrawClass() const
virtual TObject*TGFrame::DrawClone(Option_t* = "") const
virtual voidTGFrame::DrawCopy(Handle_t, Int_t, Int_t)
virtual voidTGFrame::Dump() const
voidTQObject::Emit(const char* signal)
voidTQObject::Emit(const char* signal, Long_t* paramArr)
voidTQObject::Emit(const char* signal, const char* params)
voidTQObject::Emit(const char* signal, Double_t param)
voidTQObject::Emit(const char* signal, Long_t param)
voidTQObject::Emit(const char* signal, Long64_t param)
voidTQObject::Emit(const char* signal, Bool_t param)
voidTQObject::Emit(const char* signal, Char_t param)
voidTQObject::Emit(const char* signal, UChar_t param)
voidTQObject::Emit(const char* signal, Short_t param)
voidTQObject::Emit(const char* signal, UShort_t param)
voidTQObject::Emit(const char* signal, Int_t param)
voidTQObject::Emit(const char* signal, UInt_t param)
voidTQObject::Emit(const char* signal, ULong_t param)
voidTQObject::Emit(const char* signal, ULong64_t param)
voidTQObject::Emit(const char* signal, Float_t param)
voidTQObject::EmitVA(const char* signal, Int_t nargs)
voidTQObject::EmitVA(const char* signal, Int_t nargs, va_list va)
virtual voidTObject::Error(const char* method, const char* msgfmt) const
virtual voidTObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual voidTObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual voidTObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual voidTObject::Fatal(const char* method, const char* msgfmt) const
virtual TObject*TObject::FindObject(const char* name) const
virtual TObject*TObject::FindObject(const TObject* obj) const
virtual Pixel_tTGFrame::GetBackground() const
static const TGGC&TGFrame::GetBckgndGC()
static const TGGC&TGFrame::GetBlackGC()
static Pixel_tTGFrame::GetBlackPixel()
Int_tTGFrame::GetBorderWidth() const
TGClient*TGObject::GetClient() const
TGFrame*GetContainer() const
static Int_tTGWindow::GetCounter()
static Pixel_tTGFrame::GetDefaultFrameBackground()
virtual UInt_tTGFrame::GetDefaultHeight() const
static Pixel_tTGFrame::GetDefaultSelectedBackground()
virtual TGDimensionGetDefaultSize() const
virtual UInt_tTGFrame::GetDefaultWidth() const
virtual Int_tTGFrame::GetDragType() const
virtual Option_t*TObject::GetDrawOption() const
virtual Int_tTGFrame::GetDropType() const
static Long_tTObject::GetDtorOnly()
virtual UInt_tTGWindow::GetEditDisabled() const
UInt_tTGFrame::GetEventMask() const
virtual Pixel_tTGFrame::GetForeground() const
TGFrameElement*TGFrame::GetFrameElement() const
virtual TGFrame*TGFrame::GetFrameFromPoint(Int_t x, Int_t y)
UInt_tTGFrame::GetHeight() const
static const TGGC&TGFrame::GetHilightGC()
virtual Int_tGetHsbPosition() const
TGHScrollBar*GetHScrollbar() const
virtual const char*TObject::GetIconName() const
Handle_tTGObject::GetId() const
TList*TQObject::GetListOfClassSignals() const
TList*TQObject::GetListOfConnections() const
TList*TQObject::GetListOfSignals() const
virtual const TGWindow*TGWindow::GetMainFrame() const
UInt_tTGFrame::GetMaxHeight() const
UInt_tTGFrame::GetMaxWidth() const
UInt_tTGFrame::GetMinHeight() const
UInt_tTGFrame::GetMinWidth() const
virtual const char*TGWindow::GetName() const
virtual char*TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_tTObject::GetObjectStat()
virtual Option_t*TObject::GetOption() const
virtual UInt_tTGFrame::GetOptions() const
const TGWindow*TGWindow::GetParent() const
Int_tGetScrolling() const
static const TGGC&TGFrame::GetShadowGC()
TGDimensionTGFrame::GetSize() const
virtual const char*TObject::GetTitle() const
virtual UInt_tTObject::GetUniqueID() const
TGViewPort*GetViewPort() const
virtual Int_tGetVsbPosition() const
TGVScrollBar*GetVScrollbar() const
static const TGGC&TGFrame::GetWhiteGC()
static Pixel_tTGFrame::GetWhitePixel()
UInt_tTGFrame::GetWidth() const
Int_tTGFrame::GetX() const
Int_tTGFrame::GetY() const
virtual Bool_tTGFrame::HandleButton(Event_t*)
virtual Bool_tTGFrame::HandleClientMessage(Event_t* event)
virtual Bool_tTGFrame::HandleColormapChange(Event_t*)
virtual Bool_tTGFrame::HandleConfigureNotify(Event_t* event)
virtual Bool_tTGFrame::HandleCrossing(Event_t*)
virtual Bool_tTGFrame::HandleDoubleClick(Event_t*)
virtual Bool_tTGFrame::HandleDragDrop(TGFrame*, Int_t, Int_t, TGLayoutHints*)
virtual Bool_tTGFrame::HandleDragEnter(TGFrame*)
virtual Bool_tTGFrame::HandleDragLeave(TGFrame*)
virtual Bool_tTGFrame::HandleDragMotion(TGFrame*)
virtual Bool_tTGFrame::HandleEvent(Event_t* event)
virtual Bool_tTGWindow::HandleExpose(Event_t* event)
virtual Bool_tTGFrame::HandleFocusChange(Event_t*)
virtual Bool_tTGWindow::HandleIdleEvent(TGIdleHandler*)
virtual Bool_tTGFrame::HandleKey(Event_t*)
virtual Bool_tTGFrame::HandleMotion(Event_t*)
virtual Bool_tTGFrame::HandleSelection(Event_t*)
virtual Bool_tTGFrame::HandleSelectionClear(Event_t*)
virtual Bool_tTGFrame::HandleSelectionRequest(Event_t*)
virtual Bool_tTGWindow::HandleTimer(TTimer*)
virtual Bool_tTQObject::HasConnection(const char* signal_name) const
virtual ULong_tTGObject::Hash() const
virtual voidTQObject::HighPriority(const char* signal_name, const char* slot_name = "0")
virtual voidTGWindow::IconifyWindow()
virtual voidTObject::Info(const char* method, const char* msgfmt) const
virtual Bool_tTObject::InheritsFrom(const char* classname) const
virtual Bool_tTObject::InheritsFrom(const TClass* cl) const
virtual voidTGFrame::Inspect() const
voidTObject::InvertBit(UInt_t f)
virtual TClass*IsA() const
virtual Bool_tTGFrame::IsActive() const
virtual Bool_tTGFrame::IsComposite() const
virtual Bool_tTGFrame::IsEditable() const
virtual Bool_tTGObject::IsEqual(const TObject* obj) const
virtual Bool_tTObject::IsFolder() const
virtual Bool_tTGFrame::IsLayoutBroken() const
virtual Bool_tTGWindow::IsMapped()
virtual Bool_tTGWindow::IsMapSubwindows() const
Bool_tTObject::IsOnHeap() const
virtual Bool_tTObject::IsSortable() const
Bool_tTObject::IsZombie() const
virtual voidLayout()
static voidTQObject::LoadRQ_OBJECT()
virtual voidTGWindow::LowerWindow()
virtual voidTQObject::LowPriority(const char* signal_name, const char* slot_name = "0")
virtual voidTObject::ls(Option_t* option = "") const
virtual voidTGFrame::MapRaised()
virtual voidMapSubwindows()
virtual voidTGFrame::MapWindow()
voidTObject::MayNotUse(const char* method) const
virtual voidTQObject::Message(const char* msg)
virtual voidTGFrame::Move(Int_t x, Int_t y)
virtual voidTGFrame::MoveResize(Int_t x, Int_t y, UInt_t w = 0, UInt_t h = 0)
virtual Int_tTGWindow::MustCleanup() const
virtual Bool_tTObject::Notify()
virtual Int_tTQObject::NumberOfConnections() const
virtual Int_tTQObject::NumberOfSignals() const
static voidTObject::operator delete(void* ptr)
static voidTObject::operator delete(void* ptr, void* vp)
static voidTObject::operator delete[](void* ptr)
static voidTObject::operator delete[](void* ptr, void* vp)
void*TObject::operator new(size_t sz)
void*TObject::operator new(size_t sz, void* vp)
void*TObject::operator new[](size_t sz)
void*TObject::operator new[](size_t sz, void* vp)
virtual voidTObject::Paint(Option_t* option = "")
virtual voidTObject::Pop()
virtual voidTGFrame::Print(Option_t* option = "") const
virtual voidTGFrame::ProcessedEvent(Event_t* event)
virtual Bool_tProcessMessage(Long_t msg, Long_t parm1, Long_t parm2)
virtual voidTGWindow::RaiseWindow()
virtual Int_tTObject::Read(const char* name)
virtual voidTGFrame::ReallyDelete()
virtual voidTObject::RecursiveRemove(TObject* obj)
voidTGFrame::RemoveInput(UInt_t emask)
virtual voidTGFrame::ReparentWindow(const TGWindow* p, Int_t x = 0, Int_t y = 0)
virtual voidTGWindow::RequestFocus()
voidTObject::ResetBit(UInt_t f)
virtual voidTGFrame::Resize(TGDimension size)
virtual voidTGFrame::Resize(UInt_t w = 0, UInt_t h = 0)
virtual voidTObject::SaveAs(const char* filename = "", Option_t* option = "") const
virtual voidSavePrimitive(ostream& out, Option_t* option = "")
voidTGFrame::SaveUserColor(ostream& out, Option_t*)
virtual voidTGFrame::SendMessage(const TGWindow* w, Long_t msg, Long_t parm1, Long_t parm2)
virtual voidTGFrame::SetBackgroundColor(Pixel_t back)
virtual voidTGWindow::SetBackgroundPixmap(Pixmap_t pixmap)
voidTObject::SetBit(UInt_t f)
voidTObject::SetBit(UInt_t f, Bool_t set)
virtual voidTGFrame::SetCleanup(Int_t = kLocalCleanup)
virtual voidSetContainer(TGFrame* f)
virtual voidTGFrame::SetDragType(Int_t type)
virtual voidTGFrame::SetDrawOption(Option_t* = "")
virtual voidTGFrame::SetDropType(Int_t type)
static voidTObject::SetDtorOnly(void* obj)
virtual voidTGFrame::SetEditable(Bool_t)
virtual voidTGWindow::SetEditDisabled(UInt_t on = kEditDisable)
virtual voidTGFrame::SetForegroundColor(Pixel_t)
voidTGFrame::SetFrameElement(TGFrameElement* fe)
virtual voidTGFrame::SetHeight(UInt_t h)
virtual voidSetHsbPosition(Int_t newPos)
virtual voidTGFrame::SetLayoutBroken(Bool_t = kTRUE)
virtual voidTGWindow::SetMapSubwindows(Bool_t)
virtual voidTGFrame::SetMaxHeight(UInt_t h)
virtual voidTGFrame::SetMaxWidth(UInt_t w)
virtual voidTGFrame::SetMinHeight(UInt_t h)
virtual voidTGFrame::SetMinWidth(UInt_t w)
virtual voidTGWindow::SetName(const char* name)
static voidTObject::SetObjectStat(Bool_t stat)
voidSetScrolling(Int_t scrolling)
virtual voidTGFrame::SetSize(const TGDimension& s)
virtual voidTObject::SetUniqueID(UInt_t uid)
virtual voidSetVsbPosition(Int_t newPos)
virtual voidTGFrame::SetWidth(UInt_t w)
virtual voidTGWindow::SetWindowName(const char* name = "0")
virtual voidTGFrame::SetX(Int_t x)
virtual voidTGFrame::SetY(Int_t y)
virtual voidShowMembers(TMemberInspector& insp, char* parent)
virtual voidStreamer(TBuffer& b)
voidStreamerNVirtual(TBuffer& b)
virtual voidTObject::SysError(const char* method, const char* msgfmt) const
Bool_tTObject::TestBit(UInt_t f) const
Int_tTObject::TestBits(UInt_t f) const
virtual voidTGFrame::UnmapWindow()
virtual voidTObject::UseCurrentStyle()
virtual voidTObject::Warning(const char* method, const char* msgfmt) const
virtual Int_tTObject::Write(const char* name = "0", Int_t option = 0, Int_t bufsize = 0)
virtual Int_tTObject::Write(const char* name = "0", Int_t option = 0, Int_t bufsize = 0) const
protected:
static Int_tTQObject::CheckConnectArgs(TQObject* sender, TClass* sender_class, const char* signal, TClass* receiver_class, const char* slot)
static Bool_tTQObject::ConnectToClass(TQObject* sender, const char* signal, TClass* receiver_class, void* receiver, const char* slot)
static Bool_tTQObject::ConnectToClass(const char* sender_class, const char* signal, TClass* receiver_class, void* receiver, const char* slot)
virtual voidTObject::DoError(int level, const char* location, const char* fmt, va_list va) const
virtual voidTGFrame::DoRedraw()
virtual voidTGFrame::Draw3dRectangle(UInt_t type, Int_t x, Int_t y, UInt_t w, UInt_t h)
static Time_tTGFrame::GetLastClick()
TStringTGFrame::GetOptionString() const
const TGResourcePool*TGFrame::GetResourcePool() const
virtual void*TGFrame::GetSender()
virtual const char*TQObject::GetSenderClassName() const
voidTObject::MakeZombie()
virtual voidTGFrame::StartGuiBuilding(Bool_t on = kTRUE)
private:
TGCanvas(const TGCanvas&)
TGCanvas&operator=(const TGCanvas&)

Data Members

public:
enum { kCanvasNoScroll
kCanvasScrollHorizontal
kCanvasScrollVertical
kCanvasScrollBoth
};
enum TGWindow::EEditMode { kEditEnable
kEditDisable
kEditDisableEvents
kEditDisableGrab
kEditDisableLayout
kEditDisableResize
kEditDisableHeight
kEditDisableWidth
kEditDisableBtnEnable
kEditDisableKeyEnable
};
enum TObject::EStatusBits { kCanDelete
kMustCleanup
kObjInCanvas
kIsReferenced
kHasUUID
kCannotPick
kNoContextMenu
kInvalidObject
};
enum TObject::[unnamed] { kIsOnHeap
kNotDeleted
kZombie
kBitMask
kSingleKey
kOverwrite
kWriteDelete
};
protected:
TGViewPort*fVportviewport through which we look at contents
TGHScrollBar*fHScrollbarhorizontal scrollbar
TGVScrollBar*fVScrollbarvertical scrollbar
Int_tfScrollingflag which scrolling modes are allowed
Int_tTGFrame::fXframe x position
Int_tTGFrame::fYframe y position
UInt_tTGFrame::fWidthframe width
UInt_tTGFrame::fHeightframe height
UInt_tTGFrame::fMinWidthminimal frame width
UInt_tTGFrame::fMinHeightminimal frame height
UInt_tTGFrame::fMaxWidthmaximal frame width
UInt_tTGFrame::fMaxHeightmaximal frame height
Int_tTGFrame::fBorderWidthframe border width
UInt_tTGFrame::fOptionsframe options
Pixel_tTGFrame::fBackgroundframe background color
UInt_tTGFrame::fEventMaskcurrenty active event mask
TGFrameElement*TGFrame::fFEpointer to frame element
static Bool_tTGFrame::fgInit
static Pixel_tTGFrame::fgDefaultFrameBackground
static Pixel_tTGFrame::fgDefaultSelectedBackground
static Pixel_tTGFrame::fgWhitePixel
static Pixel_tTGFrame::fgBlackPixel
static const TGGC*TGFrame::fgBlackGC
static const TGGC*TGFrame::fgWhiteGC
static const TGGC*TGFrame::fgHilightGC
static const TGGC*TGFrame::fgShadowGC
static const TGGC*TGFrame::fgBckgndGC
static Time_tTGFrame::fgLastClick
static UInt_tTGFrame::fgLastButton
static Int_tTGFrame::fgDbx
static Int_tTGFrame::fgDby
static Window_tTGFrame::fgDbw
static UInt_tTGFrame::fgUserColor
const TGWindow*TGWindow::fParentParent window
Bool_tTGWindow::fNeedRedrawkTRUE if window needs to be redrawn
TStringTGWindow::fNamename of the window used in SavePrimitive()
static Int_tTGWindow::fgCountercounter of created windows in SavePrimitive
UInt_tTGWindow::fEditDisabledflags used for "guibuilding"
Handle_tTGObject::fIdX11/Win32 Window identifier
TGClient*TGObject::fClientConnection to display server
TList*TQObject::fListOfSignals! list of signals from this object
TList*TQObject::fListOfConnections! list of connections to this object

Class Description

                                                                      
 TGCanvas and TGViewPort and TGContainer                              
                                                                      
 A TGCanvas is a frame containing two scrollbars (a horizontal and    
 a vertical) and a viewport. The viewport acts as the window through  
 which we look at the contents of the container frame.                
                                                                      
 A TGContainer frame manages a content area. It can display and       
 control a hierarchy of multi-column items, and provides the ability  
 to add new items at any time. By default it doesn't map subwindows   
 which are items of the container. In this case subwindow must        
 provide DrawCopy method, see for example TGLVEntry class.            
 It is also possible to use option which allow to map subwindows.     
 This option has much slower drawing speed in case of more than 1000  
 items placed in container. To activate this option the fMapSubwindows
 data member must be set to kTRUE (for example TTVLVContainer class)  
                                                                      
   The TGContainer class can handle the keys:                         
                                                                      
    o  F7, Ctnrl-F - activate search dialog                           
    o  F3, Ctnrl-G - continue search                                  
    o  End - go to the last item in container                         
    o  Home - go to the first item in container                       
    o  PageUp,PageDown,arrow keys - navigate inside container         
    o  Return/Enter - equivalent to double click of the mouse button  
    o  Contrl-A - select/activate all items.                          
    o  Space - invert selection.                                      
                                                                      

TGCanvas(const TGWindow *p, UInt_t w, UInt_t h, UInt_t options, ULong_t back)
 Create a canvas object.
~TGCanvas()
 Delete canvas.
void MapSubwindows()
 Map all canvas sub windows.
void AddFrame(TGFrame *f, TGLayoutHints *l)
 Adding a frame to a canvas is actually adding the frame to the
 viewport container. The viewport container must be at least a
 TGCompositeFrame for this method to succeed.
void DrawBorder()
 Draw canvas border.
void Layout()
 Create layout for canvas. Depending on the size of the container
 we need to add the scrollbars.
Bool_t ProcessMessage(Long_t msg, Long_t parm1, Long_t)
 Handle message generated by the canvas scrollbars.
Int_t GetHsbPosition()
 Get position of horizontal scrollbar.
Int_t GetVsbPosition()
 Get position of vertical scrollbar.
void SetHsbPosition(Int_t newPos)
 Set position of horizontal scrollbar.
void SetVsbPosition(Int_t newPos)
 Set position of vertical scrollbar.
void SetScrolling(Int_t scrolling)
 Set scrolling policy. Use values defined by the enum: kCanvasNoScroll,
 kCanvasScrollHorizontal, kCanvasScrollVertical, kCanvasScrollBoth.
void SavePrimitive(ostream &out, Option_t *option /*= ""*/)
 Save a canvas widget as a C++ statement(s) on output stream out.
TGContainer& operator=(const TGContainer&)
TGHScrollBar * GetHScrollbar()
TGVScrollBar * GetVScrollbar()
TGFrame * GetContainer()
{ return fContainer; }
void SetContainer(TGFrame *f)
TGDimension GetDefaultSize()
{ return TGDimension(fWidth, fHeight); }
TGCanvas(const TGCanvas&)
TGViewPort * GetViewPort()
{ return fVport; }
Int_t GetScrolling()
{ return fScrolling; }

Author: Fons Rademakers 11/01/98
Last update: root/gui:$Name: $:$Id: TGCanvas.cxx,v 1.49 2006/07/26 13:36:43 rdm Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *


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