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    41 

    42 #ifndef MODELMENU_H

    43 #define MODELMENU_H

    44 

    45 #include <QtGui/QMenu>

    46 #include <QtCore/QAbstractItemModel>

    47 

    48 // A QMenu that is dynamically populated from a QAbstractItemModel

    49 class ModelMenu : public QMenu

    50 {

    51     Q_OBJECT

    52 

    53 signals:

    54     void activated(const QModelIndex &index);

    55     void hovered(const QString &text);

    56 

    57 public:

    58     ModelMenu(QWidget *parent = 0);

    59 

    60     void setModel(QAbstractItemModel *model);

    61     QAbstractItemModel *model() const;

    62 

    63     void setMaxRows(int max);

    64     int maxRows() const;

    65 

    66     void setFirstSeparator(int offset);

    67     int firstSeparator() const;

    68 

    69     void setRootIndex(const QModelIndex &index);

    70     QModelIndex rootIndex() const;

    71 

    72     void setHoverRole(int role);

    73     int hoverRole() const;

    74 

    75     void setSeparatorRole(int role);

    76     int separatorRole() const;

    77 

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

    79 

    80 protected:

    81     // add any actions before the tree, return true if any actions are added.

    82     virtual bool prePopulated();

    83     // add any actions after the tree

    84     virtual void postPopulated();

    85     // put all of the children of parent into menu up to max

    86     void createMenu(const QModelIndex &parent, int max, QMenu *parentMenu = 0, QMenu *menu = 0);

    87 

    88 private slots:

    89     void aboutToShow();

    90     void triggered(QAction *action);

    91     void hovered(QAction *action);

    92 

    93 private:

    94     QAction *makeAction(const QModelIndex &index);

    95     int m_maxRows;

    96     int m_firstSeparator;

    97     int m_maxWidth;

    98     int m_hoverRole;

    99     int m_separatorRole;

   100     QAbstractItemModel *m_model;

   101     QPersistentModelIndex m_root;

   102 };

   103 

   104 #endif // MODELMENU_H

   105