qtbase5-dev 5.2.1+dfsg-1ubuntu14.3 / usr / include / qt5 / QtWidgets / qabstractitemdelegate.h

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtWidgets 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QABSTRACTITEMDELEGATE_H
#define QABSTRACTITEMDELEGATE_H

#include <QtCore/qobject.h>
#include <QtWidgets/qstyleoption.h>

QT_BEGIN_NAMESPACE


#ifndef QT_NO_ITEMVIEWS

class QPainter;
class QModelIndex;
class QAbstractItemModel;
class QAbstractItemView;
class QHelpEvent;

class Q_WIDGETS_EXPORT QAbstractItemDelegate : public QObject
{
    Q_OBJECT

public:

    enum EndEditHint {
        NoHint,
        EditNextItem,
        EditPreviousItem,
        SubmitModelCache,
        RevertModelCache
    };

    explicit QAbstractItemDelegate(QObject *parent = 0);
    virtual ~QAbstractItemDelegate();

    // painting
    virtual void paint(QPainter *painter,
                       const QStyleOptionViewItem &option,
                       const QModelIndex &index) const = 0;

    virtual QSize sizeHint(const QStyleOptionViewItem &option,
                           const QModelIndex &index) const = 0;

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

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

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

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

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

    // for non-widget editors
    virtual bool editorEvent(QEvent *event,
                             QAbstractItemModel *model,
                             const QStyleOptionViewItem &option,
                             const QModelIndex &index);

    static QString elidedText(const QFontMetrics &fontMetrics, int width,
                              Qt::TextElideMode mode, const QString &text);

    virtual bool helpEvent(QHelpEvent *event,
                           QAbstractItemView *view,
                           const QStyleOptionViewItem &option,
                           const QModelIndex &index);

    virtual QVector<int> paintingRoles() const;

Q_SIGNALS:
    void commitData(QWidget *editor);
    void closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint = NoHint);
    void sizeHintChanged(const QModelIndex &);

protected:
    QAbstractItemDelegate(QObjectPrivate &, QObject *parent = 0);
private:
    Q_DISABLE_COPY(QAbstractItemDelegate)
};

#endif // QT_NO_ITEMVIEWS

QT_END_NAMESPACE

#endif // QABSTRACTITEMDELEGATE_H

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