/**
 * @author Ian Johnson
 * @version 1.0
 */

#ifndef SLSQT1DZOOMER_H
#define SLSQT1DZOOMER_H

#include <qwt_plot_zoomer.h>
#include <qwt_plot_panner.h>
#include <qwt_global.h>

class SlsQtH1D;

class SlsQt1DZoomer:public QwtPlotZoomer{
 private:
  double x0,x1,y0,y1;
  double firstXgt0,firstYgt0;
  bool xIsLog,yIsLog;

 public:
    SlsQt1DZoomer(QWidget *canvas):QwtPlotZoomer(canvas){
    setTrackerMode(AlwaysOn);
    xIsLog=yIsLog=0;
  }

  double x() {return x0;}
  double x_firstGreaterThan0() {return firstXgt0;}
  double w() {return x1-x0;}

  double y() {return y0;}
  double y_firstGreaterThan0() {return firstYgt0;}
  double h() {return y1-y0;}

  void SetZoomBase(double xmin,double ymin,double x_width, double y_width);
  void SetZoomBase(SlsQtH1D* h);
  void ExtendZoomBase(SlsQtH1D* h);
  void ResetZoomBase();

  bool IsLogX(){ return xIsLog;}
  bool IsLogY(){ return yIsLog;}
  bool SetLogX(bool yes) { return xIsLog=yes;}
  bool SetLogY(bool yes) { return yIsLog=yes;}

 

  using QwtPlotPicker::trackerText;
  virtual QwtText trackerText(const QPoint &pos) const{

  QColor bg(Qt::white);
  bg.setAlpha(200);
  QwtText text = QwtPlotPicker::trackerText(pos);
  text.setBackgroundBrush( QBrush( bg ));
  return text;
  }

};

#endif