#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QtGui>

namespace Ui {
    class Widget;
}

class Widget : public QWidget {
    Q_OBJECT
public:
    Widget(QWidget *parent = 0);
    ~Widget();

protected:
    void changeEvent(QEvent *e);
    bool eventFilter(QObject *obj, QEvent *event);

private:
    Ui::Widget *ui;
};

#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"

#include <iostream>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    ui->graphicsView->installEventFilter(this); //собственно на этом виджете, созданном в Дизайнере я и хочу рисовать
}

Widget::~Widget()
{
    delete ui;
}

void Widget::changeEvent(QEvent *e)
{
    QWidget::changeEvent(e);
    switch (e->type()) {
    case QEvent::LanguageChange:
        ui->retranslateUi(this);
        break;
    default:
        break;
    }
}

    bool Widget::eventFilter(QObject *obj, QEvent *event)
    {
        if(event->type() == QEvent::Paint && obj == ui->graphicsView){
            QPaintEvent *e = static_cast<QPaintEvent *>(event);
            QPainter painter(qobject_cast<QWidget* >(obj));
            painter.drawLine(10, 10, 100, 100);

            return true;

        }else{
            return QObject::eventFilter(obj, event);
        }
    }

#include <QtGui/QApplication>
#include <QWidget>
#include "widget.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    return a.exec();
}

#ifndef PB_H
#define PB_H

#include <QtGui>
#include"lf.h"

class Pb:public QFrame
{
public:
    Pb(QFrame *parent=0);

    int get_size;
    int scene_w;
    int scene_h;
    int dev_pb;
    int chan_pb;

    lf* pbla;
    QGridLayout* pb_l;
    QFrame* pb_name;
    QHBoxLayout* pb_name_l;

    QFrame* pb_param;
    QVBoxLayout* pb_param_l;

    QFrame* pb_graf;
    QVBoxLayout* pb_graf_l;

    QLineEdit* pb_qle;

    QLCDNumber* pb_lcd;

    QFrame* pb_ed_iz;
    QLineEdit* pb_qle_ed_izm;
    QVBoxLayout* pb_qle_ed_izm_l;

    QWidget* qwpb; ////!!!!!!!! в нем то и надо рисовать картинку!!! Очень желательно не вынося куда подальше из этого класса!!!!

    void init(lf * lsa,int dev, int chan);
protected:
    void paintEvent(QPaintEvent * event);

};

#endif // PB_H

#include <QtGui>

#include "pb.h"
#include"lf.h"

Pb::pb(QFrame *parent)
    :QFrame(parent)

{

    get_size=0;
    scene_w=0;
    scene_h=0;
    dev_pb=0;
    chan_pb=0;

    this->setFrameStyle(QFrame::WinPanel | QFrame::Plain);
    pb_l = new QGridLayout;

    this->setLayout(pb_l);
    pb_l->setMargin(0);
    pb_l->setSpacing(0);

    pb_name = new QFrame;
    pb_name->setFrameStyle(QFrame::StyledPanel | QFrame::Raised);
    pb_name_l = new QHBoxLayout;
    pb_name_l->setMargin(0);
    pb_name_l->setSpacing(0);
    pb_name->setLayout(pb_name_l);

    pb_param = new QFrame;
    pb_param->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
    pb_param_l = new QVBoxLayout;
    pb_param_l->setMargin(0);
    pb_param_l->setSpacing(0);
    pb_param->setLayout(pb_param_l);

    pb_ed_iz = new QFrame;
    pb_qle_ed_izm = new QLineEdit;
    pb_ed_iz ->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
    pb_qle_ed_izm_l = new QVBoxLayout;

    pb_qle_ed_izm_l->setMargin(0);
    pb_qle_ed_izm_l->setSpacing(0);
    pb_qle_ed_izm->setMaximumSize(100,20);

    pb_ed_iz->setLayout(pb_qle_ed_izm_l);

    pb_graf = new QFrame;
    pb_graf_l = new QVBoxLayout;
    qwpb = new QWidget(this);
    //qppb= new QPainter;

    //pb_gfraf_scene = new QGraphicsScene;
    //pb_gfraf_view = new QGraphicsView;
    //pb_gfraf_view->setScene(pb_gfraf_scene);
    //pb_gfraf_view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    //pb_gfraf_view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    pb_graf->setFrameStyle(QFrame::StyledPanel | QFrame::Plain);
    pb_graf->setLayout(pb_graf_l);
    pb_graf_l->setMargin(0);
    pb_graf_l->setSpacing(0);
    pb_graf_l->addWidget(qwpb);
    //qppb= new QPainter(qwpb);

    pb_qle = new QLineEdit;
    pb_qle->setDisabled(true);
    pb_qle->setAlignment(Qt::AlignCenter);
  
    pb_qle->setText("5CV");
    pb_qle->setMaximumSize(100,20);

    pb_lcd = new QLCDNumber;
    pb_lcd->setSegmentStyle(QLCDNumber::Flat);
    pb_lcd->display(4.4);
    pb_name_l->addWidget(pb_qle);

    pb_param_l->addWidget(pb_lcd);

    pb_qle_ed_izm_l->addWidget(pb_qle_ed_izm);
    
    pb_l->addWidget(pb_name,1,1);

    pb_l->addWidget(pb_param,2,1,1,1);
    pb_l->addWidget(pb_ed_iz,3,1,1,1);

    pb_l->addWidget(pb_graf,4,1,10,1);

};



void Pb::paintEvent(QPaintEvent * event)
{
    std::cout<<"painter X  " << qwpb->geometry().x()<< std::endl;
    std::cout<<"painter Y " <<qwpb->geometry().y()<< std::endl;
    std::cout<<"layout X  " << pb_graf_l->geometry().x()<< std::endl;
    std::cout<<"layout X  " << pb_graf_l->geometry().y()<< std::endl;
    std::cout<<"qwpbw  " << pb_lcd->pos().x() << std::endl;
    std::cout<<"qwpbh  " << this->pb_lcd->pos().y() << std::endl;
};