Qt 5.8 | Qt WebEngine | WebEngine Demo Browser Example | modelmenu.h Example File

Qt 5.8.0 Reference Documentation

# modelmenu.h Example File

webenginewidgets/demobrowser/modelmenu.h

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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