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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "modelmenu.h"
#include <QtCore/QAbstractItemModel>
#include <qdebug.h>
ModelMenu::ModelMenu(QWidget * parent)
: QMenu(parent)
, m_maxRows(7)
, m_firstSeparator(-1)
, m_maxWidth(-1)
, m_hoverRole(0)
, m_separatorRole(0)
, m_model(0)
{
connect(this, SIGNAL(aboutToShow()), this, SLOT(aboutToShow()));
}
bool ModelMenu::prePopulated()
{
return false;
}
void ModelMenu::postPopulated()
{
}
void ModelMenu::setModel(QAbstractItemModel *model)
{
m_model = model;
}
QAbstractItemModel *ModelMenu::model() const
{
return m_model;
}
void ModelMenu::setMaxRows(int max)
{
m_maxRows = max;
}
int ModelMenu::maxRows() const
{
return m_maxRows;
}
void ModelMenu::setFirstSeparator(int offset)
{
m_firstSeparator = offset;
}
int ModelMenu::firstSeparator() const
{
return m_firstSeparator;
}
void ModelMenu::setRootIndex(const QModelIndex &index)
{
m_root = index;
}
QModelIndex ModelMenu::rootIndex() const
{
return m_root;
}
void ModelMenu::setHoverRole(int role)
{
m_hoverRole = role;
}
int ModelMenu::hoverRole() const
{
return m_hoverRole;
}
void ModelMenu::setSeparatorRole(int role)
{
m_separatorRole = role;
}
int ModelMenu::separatorRole() const
{
return m_separatorRole;
}
Q_DECLARE_METATYPE(QModelIndex)
void ModelMenu::aboutToShow()
{
if (QMenu *menu = qobject_cast<QMenu*>(sender())) {
QVariant v = menu->menuAction()->data();
if (v.canConvert<QModelIndex>()) {
QModelIndex idx = qvariant_cast<QModelIndex>(v);
createMenu(idx, -1, menu, menu);
disconnect(menu, SIGNAL(aboutToShow()), this, SLOT(aboutToShow()));
return;
}
}
clear();
if (prePopulated())
addSeparator();
int max = m_maxRows;
if (max != -1)
max += m_firstSeparator;
createMenu(m_root, max, this, this);
postPopulated();
}
void ModelMenu::createMenu(const QModelIndex &parent, int max, QMenu *parentMenu, QMenu *menu)
{
if (!menu) {
QString title = parent.data().toString();
menu = new QMenu(title, this);
QIcon icon = qvariant_cast<QIcon>(parent.data(Qt::DecorationRole));
menu->setIcon(icon);
parentMenu->addMenu(menu);
QVariant v;
v.setValue(parent);
menu->menuAction()->setData(v);
connect(menu, SIGNAL(aboutToShow()), this, SLOT(aboutToShow()));
return;
}
int end = m_model->rowCount(parent);
if (max != -1)
end = qMin(max, end);
connect(menu, SIGNAL(triggered(QAction*)), this, SLOT(triggered(QAction*)));
connect(menu, SIGNAL(hovered(QAction*)), this, SLOT(hovered(QAction*)));
for (int i = 0; i < end; ++i) {
QModelIndex idx = m_model->index(i, 0, parent);
if (m_model->hasChildren(idx)) {
createMenu(idx, -1, menu);
} else {
if (m_separatorRole != 0
&& idx.data(m_separatorRole).toBool())
addSeparator();
else
menu->addAction(makeAction(idx));
}
if (menu == this && i == m_firstSeparator - 1)
addSeparator();
}
}
QAction *ModelMenu::makeAction(const QModelIndex &index)
{
QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
QAction *action = makeAction(icon, index.data().toString(), this);
QVariant v;
v.setValue(index);
action->setData(v);
return action;
}
QAction *ModelMenu::makeAction(const QIcon &icon, const QString &text, QObject *parent)
{
QFontMetrics fm(font());
if (-1 == m_maxWidth)
m_maxWidth = fm.width(QLatin1Char('m')) * 30;
QString smallText = fm.elidedText(text, Qt::ElideMiddle, m_maxWidth);
return new QAction(icon, smallText, parent);
}
void ModelMenu::triggered(QAction *action)
{
QVariant v = action->data();
if (v.canConvert<QModelIndex>()) {
QModelIndex idx = qvariant_cast<QModelIndex>(v);
emit activated(idx);
}
}
void ModelMenu::hovered(QAction *action)
{
QVariant v = action->data();
if (v.canConvert<QModelIndex>()) {
QModelIndex idx = qvariant_cast<QModelIndex>(v);
QString hoveredString = idx.data(m_hoverRole).toString();
if (!hoveredString.isEmpty())
emit hovered(hoveredString);
}
}
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