File indexing completed on 2024-04-28 04:21:25

 // SPDX-FileCopyrightText: 2023 The KPhotoAlbum Development Team
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "CursorVisibilityHandler.h"
 #include <QEvent>
 #include <QTimer>
 #include <chrono>
 
 using namespace std::chrono_literals;
 
 CursorVisibilityHandler::CursorVisibilityHandler(QWidget *parentWidget)
     : QObject(parentWidget)
     , m_parentWidget(parentWidget)
     , m_timer(new QTimer(this))
 {
     m_timer->setSingleShot(true);
     connect(m_timer, &QTimer::timeout, this, &CursorVisibilityHandler::hideCursor);
     m_parentWidget->installEventFilter(this);
 
     const auto children = m_parentWidget->findChildren<QWidget *>();
     for (auto child : children)
         child->installEventFilter(this);
 }
 
 bool CursorVisibilityHandler::eventFilter(QObject *watched, QEvent *event)
 {
     switch (event->type()) {
     case QEvent::MouseButtonPress:
         // disable cursor hiding till button release
         disableCursorHiding();
         break;
 
     case QEvent::MouseMove:
         // just reset the timer
         showCursorTemporarily();
         break;
 
     case QEvent::MouseButtonRelease:
         // enable cursor hiding and reset timer
         enableCursorHiding();
         showCursorTemporarily();
         break;
 
     default:
         break;
     }
     return QObject::eventFilter(watched, event);
 }
 
 void CursorVisibilityHandler::showCursorTemporarily()
 {
     if (!cursorHidingEnabled())
         return;
 
     m_parentWidget->unsetCursor();
     m_timer->start(1500ms);
 }
 
 void CursorVisibilityHandler::disableCursorHiding()
 {
     m_cursorHidingEnabled.push(false);
     m_parentWidget->unsetCursor();
 }
 
 void CursorVisibilityHandler::enableCursorHiding()
 {
     if (!m_cursorHidingEnabled.isEmpty())
         m_cursorHidingEnabled.pop();
     hideCursor();
 }
 
 bool CursorVisibilityHandler::cursorHidingEnabled() const
 {
     return m_cursorHidingEnabled.isEmpty();
 }
 
 void CursorVisibilityHandler::hideCursor()
 {
     if (!cursorHidingEnabled())
         return;
 
     m_parentWidget->setCursor(Qt::BlankCursor);
 }