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Diffstat (limited to 'examples/webenginewidgets/browser/modelmenu.cpp')
| -rw-r--r-- | examples/webenginewidgets/browser/modelmenu.cpp | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/examples/webenginewidgets/browser/modelmenu.cpp b/examples/webenginewidgets/browser/modelmenu.cpp new file mode 100644 index 000000000..56453b080 --- /dev/null +++ b/examples/webenginewidgets/browser/modelmenu.cpp @@ -0,0 +1,226 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the demonstration applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** 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, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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); + } +} |