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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qquickhoverhandler_p.h"
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(lcHoverHandler, "qt.quick.handler.hover")
/*!
\qmltype HoverHandler
\instantiates QQuickHoverHandler
\inqmlmodule QtQuick
\ingroup qtquick-input-handlers
\brief Handler for mouse and tablet hover.
HoverHandler detects a hovering cursor. Since touchscreens don't generally
offer hover events, in practice it detects a hovering mouse or tablet stylus.
\sa MouseArea
*/
QQuickHoverHandler::QQuickHoverHandler(QQuickItem *parent)
: QQuickSinglePointHandler(parent)
{
// Rule out the touchscreen for now (can be overridden in QML in case a hover-detecting touchscreen exists)
setAcceptedDevices(static_cast<QQuickPointerDevice::DeviceType>(
static_cast<int>(QQuickPointerDevice::AllDevices) ^ static_cast<int>(QQuickPointerDevice::TouchScreen)));
}
QQuickHoverHandler::~QQuickHoverHandler()
{
if (auto parent = parentItem())
QQuickItemPrivate::get(parent)->setHasHoverInChild(false);
}
void QQuickHoverHandler::componentComplete()
{
parentItem()->setAcceptHoverEvents(true);
QQuickItemPrivate::get(parentItem())->setHasHoverInChild(true);
}
bool QQuickHoverHandler::wantsPointerEvent(QQuickPointerEvent *event)
{
QQuickEventPoint *point = event->point(0);
if (QQuickPointerDeviceHandler::wantsPointerEvent(event) && wantsEventPoint(point) && parentContains(point)) {
// assume this is a mouse event, so there's only one point
setPointId(point->pointId());
return true;
}
setHovered(false);
return false;
}
void QQuickHoverHandler::handleEventPoint(QQuickEventPoint *point)
{
setHovered(true);
setPassiveGrab(point);
}
void QQuickHoverHandler::setHovered(bool hovered)
{
if (m_hovered != hovered) {
qCDebug(lcHoverHandler) << objectName() << "hovered" << m_hovered << "->" << hovered;
m_hovered = hovered;
emit hoveredChanged();
}
}
QT_END_NAMESPACE
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