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MainWindowImpl::MainWindowImpl( QWidget * parent, Qt::WFlags f) //конструктор
	: QWidget(parent, f)
{
	plot1 = new QwtPlot(this);
	show();
	zoomer = NULL;
	if(zoomer){
		std::cout<<"zoomer - YES"<<std::endl;
	}else std::cout<<"zoomer - NO"<<std::endl;
	gh(zoomer);
	if(zoomer){
		std::cout<<"zoomer - YES"<<std::endl;
	}else std::cout<<"zoomer - NO"<<std::endl;
}

void MainWindowImpl::gh(QwtPlotZoomer *zoom){//единстенная функция MainWindowImpl находится в private
	if(zoom) delete zoom;
	zoom = new QwtPlotZoomer (QwtPlot::xBottom, QwtPlot::yLeft, plot1->canvas(), true);
	zoom->setMousePattern(QwtEventPattern::MouseSelect1, Qt::LeftButton);
	zoom->setMousePattern(QwtEventPattern::MouseSelect2, Qt::NoButton);
	zoom->setMousePattern(QwtEventPattern::MouseSelect3, Qt::MidButton);
	zoom->setMousePattern(QwtEventPattern::MouseSelect4, Qt::LeftButton);
	zoom->setMousePattern(QwtEventPattern::MouseSelect5, Qt::NoButton);
	zoom->setMousePattern(QwtEventPattern::MouseSelect6, Qt::NoButton);
	zoom->setTrackerMode(QwtPicker::AlwaysOff);
}