#include "myexample.h"

#include <QDialogButtonBox>
#include <QVBoxLayout>
#include <QPushButton>

MyInputDialog::MyInputDialog(QWidget *parent)
: QDialog(parent)
{
    m_pEdit = new QLineEdit;
    QDialogButtonBox *pBtnBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);

    QVBoxLayout *pLayout = new QVBoxLayout();
    pLayout->addWidget(m_pEdit);
    pLayout->addWidget(pBtnBox);

    setLayout(pLayout);

    connect(pBtnBox->button(QDialogButtonBox::Ok), SIGNAL(clicked()), this, SLOT(accept()));
    connect(pBtnBox->button(QDialogButtonBox::Cancel), SIGNAL(clicked()), this, SLOT(reject()));
}

MyInputDialog::~MyInputDialog()
{
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////

MyItemDelegate::MyItemDelegate(QWidget *parent)
: QStyledItemDelegate(parent)
{
}

MyItemDelegate::~MyItemDelegate()
{
}

QWidget* MyItemDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    // initialize data here instead of using setEditorData
    Q_UNUSED(option);
    MyInputDialog *pEditor = new MyInputDialog(parent);
    QString sValue = index.model()->data(index, Qt::EditRole).toString();
    pEditor->setText(sValue);
    return pEditor;
}

void MyItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    // don't update editor when model changes
    Q_UNUSED(editor);
    Q_UNUSED(index);
}

void MyItemDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    if (MyInputDialog *pInputDialog = dynamic_cast<MyInputDialog*>(editor))
    {
        // here we have the problem that regardless if 'Ok' or 'Cancel' was clicked, the result is Rejected,
        // so the value will never be set
        if (pInputDialog->result() == QDialog::Accepted)
        {
            QString sValue = pInputDialog->text();
            model->setData(index, sValue, Qt::EditRole);
        }
    }
}

void MyItemDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    Q_UNUSED(index);
    editor->move(editor->parentWidget()->mapToGlobal(option.rect.topLeft()));
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////

MyExample::MyExample(QWidget *parent)
: QListWidget(parent)
{
    addItem("Item1");
    addItem("Item2");
    addItem("Item3");

    // set items editable
    for (int i = 0; i < count(); i++)
    {
        item(i)->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsEnabled);
    }

    setItemDelegate(new MyItemDelegate(this));
}

MyExample::~MyExample()
{
}