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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt for Device Creation.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "engine.h"
#include "fpscounter.h"
#include <QFile>
#include <QTimerEvent>
#include <QDebug>
#include <QGuiApplication>
#include <QScreen>
#include <QQmlEngine>
#include <QQuickItem>
#include <QQuickWindow>
#define ENGINE_STATE_RUNNING QStringLiteral("running")
#define ENGINE_STATE_SETTINGS QStringLiteral("settings")
#define ENGINE_STATE_APPLAUNCHING QStringLiteral("app-launching")
#define ENGINE_STATE_APPRUNNING QStringLiteral("app-running")
#define ENGINE_STATE_APPCLOSING QStringLiteral("app-closing")
Engine::Engine(QQuickItem *parent)
: QQuickItem(parent)
, m_fpsCounter(0)
, m_fps(0)
, m_intro_done(false)
, m_apps_ready(false)
, m_fps_enabled(false)
, m_glAvailable(checkForGlAvailability())
{
m_state = ENGINE_STATE_RUNNING;
QScreen *screen = QGuiApplication::primaryScreen();
m_screenSize = screen->size();
m_dpcm = screen->physicalDotsPerInchY() / 2.54f;
// Make the buttons smaller for smaller screens to compensate for that
// one typically holds it nearer to the eyes.
float low = 5;
float high = 20;
float screenSizeCM = qMax<float>(qMin(m_screenSize.width(), m_screenSize.height()) / m_dpcm, low);
m_dpcm *= (screenSizeCM - low) / (high - low) * 0.5 + 0.5;
m_screenWidth = m_screenSize.width();
m_screenHeight = m_screenSize.height();
connect(this, SIGNAL(windowChanged(QQuickWindow*)), this, SLOT(windowChanged(QQuickWindow*)));
}
bool Engine::checkForGlAvailability()
{
QQuickWindow window;
return ((window.sceneGraphBackend() != "software") &&
(window.sceneGraphBackend() != "softwarecontext"));
}
void Engine::updateReadyness()
{
if (!m_intro_done)
return;
if (!m_apps_ready)
return;
m_state = ENGINE_STATE_RUNNING;
emit stateChanged(m_state);
}
void Engine::updateFPSCounter()
{
if (m_fpsCounter) {
delete m_fpsCounter;
m_fpsCounter = 0;
}
if (m_fps_enabled && window()) {
m_fpsCounter = new FpsCounter(window());
connect(m_fpsCounter, SIGNAL(fps(qreal)), this, SLOT(setFps(qreal)));
}
}
void Engine::setState(const QString &state)
{
if (state == m_state)
return;
m_state = state;
emit stateChanged(m_state);
}
int Engine::titleBarSize() const
{
return int(QGuiApplication::primaryScreen()->physicalDotsPerInch() / 2.54f);
}
void Engine::setFps(qreal fps)
{
fps = qRound(fps);
if (qFuzzyCompare(m_fps, fps))
return;
m_fps = fps;
emit fpsChanged(m_fps);
}
void Engine::windowChanged(QQuickWindow *window)
{
Q_UNUSED(window)
//When window changes we need to recreate the fps counters
updateFPSCounter();
}
void Engine::setFpsEnabled(bool enabled)
{
if (m_fps_enabled == enabled)
return;
m_fps_enabled = enabled;
updateFPSCounter();
emit fpsEnabledChanged(m_fps_enabled);
}
int Engine::sensibleButtonSize() const
{
// 3cm buttons, nice and big...
int buttonSize = int(m_dpcm * 3);
int baseSize = qMin(m_screenSize.width(), m_screenSize.height());
// Clamp buttonSize to screen..
if (buttonSize > baseSize)
buttonSize = baseSize;
return buttonSize;
}
bool Engine::fileExists(const QUrl &fileName)
{
QFile file(fileName.toLocalFile());
return file.exists();
}
void Engine::launchApplication(const QUrl &path, const QString &mainFile, const QString &name, const QString &desc)
{
// only launch apps when in the homescreen...
if (m_state != QStringLiteral("running"))
return;
m_applicationMain = m_applicationUrl = path;
m_applicationMain.setPath(path.path() + "/" + mainFile);
m_applicationName = name;
m_applicationDescription = desc;
emit applicationUrlChanged(m_applicationUrl);
emit applicationMainChanged(m_applicationMain);
emit applicationNameChanged(m_applicationName);
emit applicationDescriptionChanged(m_applicationName);
setState(ENGINE_STATE_APPLAUNCHING);
}
void Engine::closeApplication()
{
emit activeIconChanged(0);
m_applicationMain = m_applicationUrl = QUrl();
m_applicationName = QString();
m_applicationDescription = QString();
emit applicationUrlChanged(m_applicationUrl);
emit applicationMainChanged(m_applicationMain);
emit applicationNameChanged(m_applicationName);
emit applicationDescriptionChanged(m_applicationName);
setState(ENGINE_STATE_RUNNING);
}
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