Canvas.h

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#ifndef EVDB_CANVAS_H
#define EVDB_CANVAS_H

#include "TQObject.h"
#include "RQ_OBJECT.h"
#include "nuevdb/EventDisplayBase/Printable.h"

class TGMainFrame;
class TGCompositeFrame;
class TGLayoutHints;
class TRootEmbeddedCanvas;
class TCanvas;

namespace evdb {
  class Canvas : public Printable {
    RQ_OBJECT("evdb::Canvas")
    
  public:
    Canvas(TGMainFrame* mf);
    virtual ~Canvas();
  
    virtual void Draw(const char* opt=0) = 0;
    
    // Sub-classes must define these
    virtual const char* PrintTag()    const {return "sub-class needs print tag"; }
    virtual const char* Description() const {return "sub-class needs description"; }
    virtual void        Print(const char* f);
  
    void Connect(); 
    
  protected:
    TGCompositeFrame*    fFrame;     
    TGLayoutHints*       fLayout;    
    TRootEmbeddedCanvas* fEmbCanvas; 
    TCanvas*             fCanvas;    
    
    unsigned short fXsize;       
    unsigned short fYsize;       
    float          fAspectRatio; 
  };
}

#endif // EVDB_CANVAS_H