qabstractitemdelegate.cpp

Go to the documentation of this file.

/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qabstractitemdelegate.h"

#ifndef QT_NO_ITEMVIEWS
#include <qabstractitemmodel.h>
#include <qabstractitemview.h>
#include <qfontmetrics.h>
#include <qwhatsthis.h>
#include <qtooltip.h>
#include <qevent.h>
#include <qstring.h>
#include <qdebug.h>
#include <private/qtextengine_p.h>

QT_BEGIN_NAMESPACE

QAbstractItemDelegate::QAbstractItemDelegate(QObject *parent)
    : QObject(parent)
{

}

QAbstractItemDelegate::QAbstractItemDelegate(QObjectPrivate &dd, QObject *parent)
    : QObject(dd, parent)
{

}

QAbstractItemDelegate::~QAbstractItemDelegate()
{

}

QWidget *QAbstractItemDelegate::createEditor(QWidget *,
                                             const QStyleOptionViewItem &,
                                             const QModelIndex &) const
{
    return 0;
}

void QAbstractItemDelegate::setEditorData(QWidget *,
                                          const QModelIndex &) const
{
    // do nothing
}

void QAbstractItemDelegate::setModelData(QWidget *,
                                         QAbstractItemModel *,
                                         const QModelIndex &) const
{
    // do nothing
}

void QAbstractItemDelegate::updateEditorGeometry(QWidget *,
                                                 const QStyleOptionViewItem &,
                                                 const QModelIndex &) const
{
    // do nothing
}

bool QAbstractItemDelegate::editorEvent(QEvent *,
                                        QAbstractItemModel *,
                                        const QStyleOptionViewItem &,
                                        const QModelIndex &)
{
    // do nothing
    return false;
}

QString QAbstractItemDelegate::elidedText(const QFontMetrics &fontMetrics, int width,
                                          Qt::TextElideMode mode, const QString &text)
{
    return fontMetrics.elidedText(text, mode, width);
}

// ### Qt 5: Make this a virtual non-slot function
bool QAbstractItemDelegate::helpEvent(QHelpEvent *event,
                                      QAbstractItemView *view,
                                      const QStyleOptionViewItem &option,
                                      const QModelIndex &index)
{
    Q_UNUSED(option);

    if (!event || !view)
        return false;
    switch (event->type()) {
#ifndef QT_NO_TOOLTIP
    case QEvent::ToolTip: {
        QHelpEvent *he = static_cast<QHelpEvent*>(event);
        QVariant tooltip = index.data(Qt::ToolTipRole);
        if (tooltip.canConvert<QString>()) {
            QToolTip::showText(he->globalPos(), tooltip.toString(), view);
            return true;
        }
        break;}
#endif
#ifndef QT_NO_WHATSTHIS
    case QEvent::QueryWhatsThis: {
        if (index.data(Qt::WhatsThisRole).isValid())
            return true;
        break; }
    case QEvent::WhatsThis: {
        QHelpEvent *he = static_cast<QHelpEvent*>(event);
        QVariant whatsthis = index.data(Qt::WhatsThisRole);
        if (whatsthis.canConvert<QString>()) {
            QWhatsThis::showText(he->globalPos(), whatsthis.toString(), view);
            return true;
        }
        break ; }
#endif
    default:
        break;
    }
    return false;
}

QT_END_NAMESPACE

#endif // QT_NO_ITEMVIEWS