demos/browser/modelmenu.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:16 +0200
branchRCL_3
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Revision: 201003 Kit: 201007
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef MODELMENU_H
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#define MODELMENU_H
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#include <QtGui/QMenu>
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#include <QtCore/QAbstractItemModel>
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// A QMenu that is dynamically populated from a QAbstractItemModel
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class ModelMenu : public QMenu
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{
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    Q_OBJECT
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signals:
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    void activated(const QModelIndex &index);
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    void hovered(const QString &text);
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public:
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    ModelMenu(QWidget *parent = 0);
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    void setModel(QAbstractItemModel *model);
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    QAbstractItemModel *model() const;
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    void setMaxRows(int max);
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    int maxRows() const;
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    void setFirstSeparator(int offset);
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    int firstSeparator() const;
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    void setRootIndex(const QModelIndex &index);
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    QModelIndex rootIndex() const;
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    void setHoverRole(int role);
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    int hoverRole() const;
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    void setSeparatorRole(int role);
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    int separatorRole() const;
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    QAction *makeAction(const QIcon &icon, const QString &text, QObject *parent);
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protected:
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    // add any actions before the tree, return true if any actions are added.
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    virtual bool prePopulated();
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    // add any actions after the tree
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    virtual void postPopulated();
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    // put all of the children of parent into menu up to max
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    void createMenu(const QModelIndex &parent, int max, QMenu *parentMenu = 0, QMenu *menu = 0);
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private slots:
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    void aboutToShow();
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    void triggered(QAction *action);
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    void hovered(QAction *action);
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private:
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    QAction *makeAction(const QModelIndex &index);
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    int m_maxRows;
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    int m_firstSeparator;
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    int m_maxWidth;
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    int m_hoverRole;
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    int m_separatorRole;
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    QAbstractItemModel *m_model;
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    QPersistentModelIndex m_root;
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};
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#endif // MODELMENU_H
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