Hello all.
I'm reading Johan Thelin's "Foundation of Qt Development" And I'm at Costum View. It is little bit difficult and i write code such as in the book.
I Dropped TableView on a form and then:
MainWindow Constructor:
Qt Code: 
  1. MainWindow::MainWindow(QWidget *parent) :
  2.     QMainWindow(parent),
  3.     ui(new Ui::MainWindow)
  4. {
  5.     ui->setupUi(this);
  6.  
  7.  
  9.     for(int i = 0; i < 10; i++){
  10.         QStandardItem *item = new QStandardItem(QString("Row: %1").arg(i));
  11.         item->setEditable(false);
  12.         model->setItem(i,0,item);
  13.  
  14.         model->setItem(i,1,new QStandardItem(QString::number((i*30)%100)));
  15.     }
  16.  
  17.     ui->tableView->setModel(model);
  18.  
  19.     BarDelegate dg;
  20.     ui->tableView->setItemDelegateForColumn(1,&dg);
  21. }
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But I get such error:
Capture.jpg

Here is BarDelegate declaration and definition:
Qt Code: 
  1. class BarDelegate : public QAbstractItemDelegate
  2. {
  3. public:
  4.     BarDelegate(QObject *parent = 0);
  5.  
  6.     void paint(QPainter *painter,const QStyleOptionViewItem &option,const QModelIndex *index) const;
  7.  
  8.     QSize sizeHint(const QStyleOptionViewItem *option,const QModelIndex &index) const;
  9. };
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Qt Code: 
  1. #include "bardelegate.h"
  2.  
  3. BarDelegate::BarDelegate(QObject *parent)
  4. {
  5.  
  6. }
  7. QSize BarDelegate::sizeHint(const QStyleOptionViewItem *option, const QModelIndex &index) const
  8. {
  9.     return QSize(45,15);
  10. }
  11.  
  12. void BarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex *index) const
  13. {
  14.     if(option.state & QStyle::State_Selected)
  15.         painter->fillRect(option.rect,option.palette.highlight() );
  16.  
  17.     int value = index->model()->data(index,Qt::DisplayRole).toInt();
  18.     double factor = (double)value/100.0;
  19.  
  20.     painter->save();
  21.  
  22.     if(factor > 1)
  23.     {
  24.         painter->setBrush(Qt::red);
  25.         factor = 1;
  26.     }
  27.     else
  28.         painter->setBrush(QColor(0,(int)(factor*255),255-(int)(factor*255)));
  29.  
  30.     painter->setPen(Qt::black);
  31.     painter->drawRect(option.rect.x()+2,option.rect.y()+2,(int)(factor*(option.rect.width()-5)),option.rect.height()-5);
  32.  
  33.     painter->restore();
  34. }
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