modelmenu.h Example File | Qt WebKit Examples 5.5

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# modelmenu.h Example File

webkitwidgets/browser/modelmenu.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
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    #ifndef MODELMENU_H
    #define MODELMENU_H

    #include <QtWidgets/QMenu>
    #include <QtCore/QAbstractItemModel>

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

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

    public:
        ModelMenu(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 // MODELMENU_H