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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <QtCore/private/qohoscommon_p.h>
#include <optional>
#include <render/qohoshovereventsgenerator.h>
QT_BEGIN_NAMESPACE
namespace {
const QPointF fallbackLocalPositionWhenUnknown{0, 0};
const QPointF fallbackGlobalPositionWhenUnknown{0, 0};
class QOhosHoverEventsGeneratorImpl : public QOhosHoverEventsGenerator
{
public:
QOhosHoverEventsGeneratorImpl(
QtOhos::QThreadSafeRef<QWindow> qWindowRef,
QtOhos::QThreadSafeRef<QOhosInputMethodEventHandler> imEventHandlerRef);
void handleQOhosMouseEvent(const QOhosMouseEvent &mouseEvent) override;
void handleQOhosHoverEvent(bool hovered) override;
private:
void sendQtHoverEvent(bool isHover);
QtOhos::QThreadSafeRef<QWindow> m_qWindowRef;
QtOhos::QThreadSafeRef<QOhosInputMethodEventHandler> m_imEventHandlerRef;
std::optional<QPointF> m_optCurrentLocalPosition;
std::optional<QPointF> m_optCurrentGlobalPosition;
bool m_hovered;
};
QOhosHoverEventsGeneratorImpl::QOhosHoverEventsGeneratorImpl(
QtOhos::QThreadSafeRef<QWindow> qWindowRef,
QtOhos::QThreadSafeRef<QOhosInputMethodEventHandler> imEventHandlerRef)
: m_qWindowRef(qWindowRef)
, m_imEventHandlerRef(imEventHandlerRef)
, m_hovered(false)
{
}
void QOhosHoverEventsGeneratorImpl::handleQOhosMouseEvent(const QOhosMouseEvent &mouseEvent)
{
m_optCurrentLocalPosition = mouseEvent.localPosition;
m_optCurrentGlobalPosition = mouseEvent.globalPosition;
if (!m_hovered) {
sendQtHoverEvent(true);
m_hovered = true;
}
}
void QOhosHoverEventsGeneratorImpl::sendQtHoverEvent(bool isHover)
{
const auto localPosition = m_optCurrentLocalPosition.value_or(fallbackLocalPositionWhenUnknown);
const auto globalPosition = m_optCurrentGlobalPosition.value_or(fallbackGlobalPositionWhenUnknown);
m_imEventHandlerRef.visitInQtThreadIfAlive(
[isHover, localPosition, globalPosition, qWindowRef = m_qWindowRef](QOhosInputMethodEventHandler &imEventHandler) {
QWindow *qWindow = qWindowRef.data();
if (qWindow != nullptr) {
imEventHandler.onHoverEvent(
QOhosHoverEvent {
.targetWindow = qWindow,
.localPosition = localPosition,
.globalPosition = globalPosition,
.isHover = isHover,
});
}
});
}
void QOhosHoverEventsGeneratorImpl::handleQOhosHoverEvent(bool hovered)
{
if (!hovered && m_hovered) {
sendQtHoverEvent(false);
m_hovered = false;
}
}
}
QOhosHoverEventsGenerator::QOhosHoverEventsGenerator() = default;
QOhosHoverEventsGenerator::~QOhosHoverEventsGenerator() = default;
std::shared_ptr<QOhosHoverEventsGenerator> makeQOhosHoverEventsGenerator(
QtOhos::QThreadSafeRef<QWindow> qWindowRef,
QtOhos::QThreadSafeRef<QOhosInputMethodEventHandler> imEventHandlerRef)
{
return std::make_shared<QOhosHoverEventsGeneratorImpl>(qWindowRef, imEventHandlerRef);
}
QT_END_NAMESPACE