#include <QTreeWidgetItem>
 
    void info (QTreeWidgetItem * target, QObject * obj);

void MainWindow::on_pushButton_clicked()
{
    // info (ui->pushButton);
    // info (ui->treeWidget);
    info (NULL, this);
}
 
 
// #include <QTreeWidgetItem>
// #include <QMetaMethod>
// #include <QMetaProperty>
void MainWindow::info (QTreeWidgetItem * target, QObject * obj)
{
    QTreeWidgetItem * top = new QTreeWidgetItem;
    if (target == NULL)
       ui->treeWidget->addTopLevelItem (top);
    else
       target->addChild (top);
 
    QString s = obj->metaObject()->className();
    top->setText (0, s);
 
    const QMetaObject * cls = obj->metaObject();
 
    QTreeWidgetItem * branch = new QTreeWidgetItem;
    branch->setText (0, "super-classes");
    top->addChild (branch);
 
    QTreeWidgetItem * above = branch;
    const QMetaObject * super = cls->superClass ();
    while (super != NULL)
    {
       QTreeWidgetItem * node = new QTreeWidgetItem;
       node->setText (0, super->className());
       above->addChild (node);
       super = super->superClass();
       above = node;
    }
 
    branch = new QTreeWidgetItem;
    branch->setText (0, "properties");
    top->addChild (branch);
 
    int n = cls->propertyCount ();
    for (int i = 0; i < n; i++)
    {
        QMetaProperty p = cls->property (i);
 
        // #include "propitem.h"
        PropItem * node = new PropItem;
        node->obj = obj;
        node->prop = p;
 
        QVariant value = p.read (obj);
        QString v = value.isNull() ? "null" : value.toString();
        node->setText (0, p.name () + QString (" : ") + p.typeName () +
                                      QString (" = ") + v);
        branch->addChild (node);
    }
 
    branch = new QTreeWidgetItem;
    branch->setText (0, "methods");
    top->addChild (branch);
 
    n = cls->methodCount ();
    for (int i = 0; i < n; i++)
    {
        QMetaMethod m = cls->method (i);
        QTreeWidgetItem * node = new QTreeWidgetItem;
        node->setText (0, m.signature ());
        branch->addChild (node);
    }
 
    const QObjectList & list = obj->children();
    foreach (QObject * item , list)
        info (top, item);
}

void MainWindow::on_pushButton_2_clicked()
{
    QList <QTreeWidgetItem*> list = ui->treeWidget->selectedItems();
    foreach (QTreeWidgetItem * t , list)
    {
        PropItem * u = dynamic_cast <PropItem*> (t);
        if (u != NULL)
        {
            t->setForeground (0, QColor ("lime"));
            if (u->prop.type () == QVariant::Int)
                t->setForeground (0, QColor ("orange"));
        }
        else
            t->setForeground (0, QColor ("red"));
 
        if (u != NULL)
        {
            if (u->prop.type () == QVariant::Int)
            {
                QVariant value = ui->spinBox->value();
                u->prop.write (u->obj, value);
            }
            else if (u->prop.type () == QVariant::Bool)
            {
                QVariant value = ui->checkBox->checkState();
                u->prop.write (u->obj, value);
            }
            else
            {
               QVariant value = ui->lineEdit->text();
               u->prop.write (u->obj, value);
            }
        }
    }
}