WBModelMenu.h

/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
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** Contact: Qt Software Information (qt-info@nokia.com)
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** This file is part of the demonstration applications of the Qt Toolkit.
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#ifndef WBMODELMENU_H
#define WBMODELMENU_H

#include <QtGui>

// A QMenu that is dynamically populated from a QAbstractItemModel
class WBModelMenu : public QMenu
{
    Q_OBJECT

    signals:
        void activated(const QModelIndex &index);
        void hovered(const QString &text);

    public:
        WBModelMenu(QWidget *parent = 0);

        void setModel(QAbstractItemModel *model);
        QAbstractItemModel *model() const;

        void setMaxRows(int max);
        int maxRows() const;

        void setFirstSeparator(int offset);
        int firstSeparator() const;

        void setRootIndex(const QModelIndex &index);
        QModelIndex rootIndex() const;

        void setHoverRole(int role);
        int hoverRole() const;

        void setSeparatorRole(int role);
        int separatorRole() const;

        QAction *makeAction(const QIcon &icon, const QString &text, QObject *parent);

    protected:
        // add any actions before the tree, return true if any actions are added.
        virtual bool prePopulated();
        // add any actions after the tree
        virtual void postPopulated();
        // put all of the children of parent into menu up to max
        void createMenu(const QModelIndex &parent, int max, QMenu *parentMenu = 0, QMenu *menu = 0);

    private slots:
        void aboutToShow();
        void triggered(QAction *action);
        void hovered(QAction *action);

    private:
        QAction *makeAction(const QModelIndex &index);
        int m_maxRows;
        int m_firstSeparator;
        int m_maxWidth;
        int m_hoverRole;
        int m_separatorRole;
        QAbstractItemModel *m_model;
        QPersistentModelIndex m_root;
};

#endif // WBMODELMENU_H