1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2015 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the demonstration applications of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL21$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. For further 15 ** information use the contact form at http://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 2.1 or version 3 as published by the Free 20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and 21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the 22 ** following information to ensure the GNU Lesser General Public License 23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and 24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 25 ** 26 ** As a special exception, The Qt Company gives you certain additional 27 ** rights. These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** $QT_END_LICENSE$ 31 ** 32 ****************************************************************************/ 33 34 #ifndef MODELMENU_H 35 #define MODELMENU_H 36 37 #include <QtWidgets/QMenu> 38 #include <QtCore/QAbstractItemModel> 39 40 // A QMenu that is dynamically populated from a QAbstractItemModel 41 class ModelMenu : public QMenu 42 { 43 Q_OBJECT 44 45 signals: 46 void activated(const QModelIndex &index); 47 void hovered(const QString &text); 48 49 public: 50 ModelMenu(QWidget *parent = 0); 51 52 void setModel(QAbstractItemModel *model); 53 QAbstractItemModel *model() const; 54 55 void setMaxRows(int max); 56 int maxRows() const; 57 58 void setFirstSeparator(int offset); 59 int firstSeparator() const; 60 61 void setRootIndex(const QModelIndex &index); 62 QModelIndex rootIndex() const; 63 64 void setHoverRole(int role); 65 int hoverRole() const; 66 67 void setSeparatorRole(int role); 68 int separatorRole() const; 69 70 QAction *makeAction(const QIcon &icon, const QString &text, QObject *parent); 71 72 protected: 73 // add any actions before the tree, return true if any actions are added. 74 virtual bool prePopulated(); 75 // add any actions after the tree 76 virtual void postPopulated(); 77 // put all of the children of parent into menu up to max 78 void createMenu(const QModelIndex &parent, int max, QMenu *parentMenu = 0, QMenu *menu = 0); 79 80 private slots: 81 void aboutToShow(); 82 void triggered(QAction *action); 83 void hovered(QAction *action); 84 85 private: 86 QAction *makeAction(const QModelIndex &index); 87 int m_maxRows; 88 int m_firstSeparator; 89 int m_maxWidth; 90 int m_hoverRole; 91 int m_separatorRole; 92 QAbstractItemModel *m_model; 93 QPersistentModelIndex m_root; 94 }; 95 96 #endif // MODELMENU_H 97 98