QStandardItemModel-Delegate

//delete.h
#ifndef DELEGATE_H
#define DELEGATE_H
#include<QItemDelegate>
#include<QModelIndex>
#include<QObject>
#include<QSize>
#include<QSpinBox>
#include<QWidget>

class Delegate : public QItemDelegate
{
    Q_OBJECT
public:
    explicit Delegate(QObject *parent = 0);

    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;

    void setEditorData(QWidget *editor, const QModelIndex &index) const;

    void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;

    void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const;

};

#endif // DELEGATE_H

　　

//dialog.h
#ifndef DIALOG_H
#define DIALOG_H
#include"delegate.h"

#include <QDialog>
#include<QtCore>
#include<QtGui>
#include<QModelIndex>
#include<QStandardItemModel>

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();

private:
    Ui::Dialog *ui;
    QStandardItemModel *model;
    Delegate *mydelegate;
};

#endif // DIALOG_H

　　

//delegate.cpp
#include "delegate.h"

Delegate::Delegate(QObject *parent):QItemDelegate(parent)
{

}

QWidget *Delegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QSpinBox *editor = new QSpinBox(parent);
    editor->setMinimum(0);
    editor->setMaximum(100);
    return editor;
}

void Delegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    int value = index.model()->data(index,Qt::EditRole).toInt();
    QSpinBox *spinbox = static_cast<QSpinBox*>(editor);
    spinbox->setValue(value);
}

void Delegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    QSpinBox *spinbox = static_cast<QSpinBox*>(editor);
    spinbox->interpretText();
    int value = spinbox->value();
    model->setData(index,value,Qt::EditRole);
}

void Delegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    editor->setGeometry(option.rect);
}

　　

//dialog.cpp
#include "dialog.h"
#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
    mydelegate = new Delegate(this);

    model = new QStandardItemModel(4,2,this);
    for(int row = 0; row < 4; ++row)
    {
        for(int col = 0; col < 2; ++col)
        {
            QModelIndex index = model->index(row,col,QModelIndex());
            model->setData(index,0);
        }
    }

    ui->tableView->setModel(model);
    ui->tableView->setItemDelegate(mydelegate);
}

Dialog::~Dialog()
{
    delete ui;
}

　　

//main.cpp
#include "dialog.h"
#include <QApplication>

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

    return a.exec();
}