TGCanvas

class TGCanvas : public TGFrame

    public:

                 TGCanvas TGCanvas(const TGWindow* p, UInt_t w, UInt_t h, UInt_t options = kSunkenFrame|kDoubleBorder, ULong_t back = fgDefaultFrameBackground)
                 TGCanvas TGCanvas(TGCanvas&)
             virtual void ~TGCanvas()
             virtual void AddFrame(TGFrame* f, TGLayoutHints* l = 0)
           static TClass* Class()
             virtual void DrawBorder()
                 TGFrame* GetContainer() const
      virtual TGDimension GetDefaultSize() const
            virtual Int_t GetHsbPosition() const
                    Int_t GetScrolling() const
              TGViewPort* GetViewPort() const
            virtual Int_t GetVsbPosition() const
          virtual TClass* IsA() const
             virtual void Layout()
             virtual void MapSubwindows()
           virtual Bool_t ProcessMessage(Long_t msg, Long_t parm1, Long_t parm2)
             virtual void SetContainer(TGFrame* f)
             virtual void SetHsbPosition(Int_t newPos)
                     void SetScrolling(Int_t scrolling)
             virtual void SetVsbPosition(Int_t newPos)
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)

  Data Members

    protected:

        TGViewPort* fVport       viewport through which we look at contents
      TGHScrollBar* fHScrollbar  horizontal scrollbar
      TGVScrollBar* fVScrollbar  vertical scrollbar
              Int_t fScrolling   flag which srolling modes are allowed

    public:

      static const enum TObject:: kCanvasNoScroll          
      static const enum TObject:: kCanvasScrollHorizontal  
      static const enum TObject:: kCanvasScrollVertical    
      static const enum TObject:: kCanvasScrollBoth        

See also

TGListView, TRootEmbeddedCanvas

Class Description

                                                                      
 TGCanvas and TGViewPort                                              
                                                                      
 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.                
                                                                      

 Create a canvas object.

 Delete canvas.

 Map all canvas sub windows.

 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.

 Draw canvas border.

 Create layout for canvas. Depending on the size of the container
 we need to add the scrollbars.

 Handle message generated by the canvas scrollbars.

 Get position of horizontal scrollbar.

 Get position of vertical scrollbar.

 Set position of horizontal scrollbar.

 Set position of vertical scrollbar.

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

Inline Functions

           TGFrame* GetContainer() const
        TGViewPort* GetViewPort() const
               void SetContainer(TGFrame* f)
              Int_t GetScrolling() const
        TGDimension GetDefaultSize() const
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
           TGCanvas TGCanvas(TGCanvas&)