ABC describing GUI independent main window (with menubar, scrollbars and a drawing area).
| void | Build(TCanvas* c, const char* name, Int_t x, Int_t y, UInt_t width, UInt_t height) |
| virtual Bool_t | TCanvasImp::IsLocked() |
| virtual void | TCanvasImp::Lock() |
| TCanvasImp& | TCanvasImp::operator=(const TCanvasImp& ci) |
| virtual void | TCanvasImp::Unlock() |
| TCanvas* | TCanvasImp::fCanvas | TCanvas associated with this implementation |
| TQRootCanvas* | fQCanvas | Pointer to the Qt widget (TQRootCanvas) |

TQCanvasImp ctor
Build the TQRootCanvas