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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/
#include "q3dwindow.h"
#include "q3dwindow_p.h"
#include "abstract3dcontroller_p.h"
#include "qabstract3dinputhandler_p.h"
#include "q3dscene_p.h"
#include <QGuiApplication>
#include <QOpenGLContext>
#include <QOpenGLPaintDevice>
#include <QPainter>
QT_DATAVISUALIZATION_BEGIN_NAMESPACE
/*!
* \class Q3DWindow
* \inmodule QtDataVisualization
* \brief The Q3DWindow class provides a window and render loop.
* \since Qt Data Visualization 1.0
*
* This class creates a QWindow and provides render loop for visualization types inheriting it.
*
* You should not need to use this class directly, but one of its subclasses instead.
*
* \note Q3DWindow sets window flag \c{Qt::FramelessWindowHint} on by default. If you want to display
* graph windows as standalone windows with regular window frame, clear this flag after constructing
* the graph. For example:
*
* \code
* Q3DBars *graphWindow = new Q3DBars;
* graphWindow->setFlags(graphWindow->flags() ^ Qt::FramelessWindowHint);
* \endcode
*
* \sa Q3DBars, Q3DScatter, Q3DSurface, {Qt Data Visualization C++ Classes}
*/
/*!
* \internal
*/
Q3DWindow::Q3DWindow(Q3DWindowPrivate *d, QWindow *parent)
: QWindow(parent),
d_ptr(d)
{
d_ptr->m_context = new QOpenGLContext(this);
setFlags(flags() | Qt::FramelessWindowHint);
setSurfaceType(QWindow::OpenGLSurface);
QSurfaceFormat surfaceFormat;
surfaceFormat.setDepthBufferSize(24);
#if !defined(QT_OPENGL_ES_2)
surfaceFormat.setSamples(8);
surfaceFormat.setRenderableType(QSurfaceFormat::OpenGL);
#else
surfaceFormat.setRenderableType(QSurfaceFormat::OpenGLES);
#endif
surfaceFormat.setSwapBehavior(QSurfaceFormat::DoubleBuffer);
setFormat(surfaceFormat);
create();
d_ptr->m_context->setFormat(requestedFormat());
d_ptr->m_context->create();
d_ptr->m_context->makeCurrent(this);
initializeOpenGLFunctions();
const GLubyte *version = glGetString(GL_VERSION);
qDebug() << "OpenGL version:" << (const char *)version;
version = glGetString(GL_SHADING_LANGUAGE_VERSION);
qDebug() << "GLSL version:" << (const char *)version;
#if !defined(QT_OPENGL_ES_2)
// If we have real OpenGL, GLSL version must be 1.2 or over. Quit if not.
QStringList splitversionstr = QString::fromLatin1((const char *)version).split(QChar::fromLatin1(' '));
if (splitversionstr[0].toFloat() < 1.2)
qFatal("GLSL version must be 1.20 or higher. Try installing latest display drivers.");
#endif
d_ptr->renderLater();
}
/*!
* Destroys Q3DWindow.
*/
Q3DWindow::~Q3DWindow()
{
}
/*!
* Adds the given \a inputHandler to the graph. The input handlers added via addInputHandler
* are not taken in to use directly. Only the ownership of the a\ inputHandler is given to the graph.
* The \a inputHandler must not be null or already added to another graph.
*
* \sa releaseInputHandler(), setActiveInputHandler()
*/
void Q3DWindow::addInputHandler(QAbstract3DInputHandler *inputHandler)
{
d_ptr->m_visualController->addInputHandler(inputHandler);
}
/*!
* Releases the ownership of the \a inputHandler back to the caller, if it was added to this graph.
* If the released \a inputHandler is in use there will be no input handler active after this call.
*
* If the default input handler is released and added back later, it behaves as any other input handler would.
*
* \sa addInputHandler(), setActiveInputHandler()
*/
void Q3DWindow::releaseInputHandler(QAbstract3DInputHandler *inputHandler)
{
d_ptr->m_visualController->releaseInputHandler(inputHandler);
}
/*!
* Sets the active \a inputHandler. Implicitly calls addInputHandler() to transfer ownership of
* the \a inputHandler to this graph.
*
* If the \a inputHandler is null, no input handler will be active after this call.
*
* \sa addInputHandler(), releaseInputHandler()
*/
void Q3DWindow::setActiveInputHandler(QAbstract3DInputHandler *inputHandler)
{
d_ptr->m_visualController->setActiveInputHandler(inputHandler);
}
/*!
* \return currently active input handler.
*/
QAbstract3DInputHandler *Q3DWindow::activeInputHandler()
{
return d_ptr->m_visualController->activeInputHandler();
}
/*!
* \internal
*/
bool Q3DWindow::event(QEvent *event)
{
switch (event->type()) {
case QEvent::UpdateRequest:
d_ptr->renderNow();
return true;
case QEvent::TouchBegin:
case QEvent::TouchCancel:
case QEvent::TouchUpdate:
case QEvent::TouchEnd:
d_ptr->m_visualController->touchEvent(static_cast<QTouchEvent *>(event));
return true;
default:
return QWindow::event(event);
}
}
/*!
* \internal
*/
void Q3DWindow::resizeEvent(QResizeEvent *event)
{
Q_UNUSED(event);
Q3DScene *scene = d_ptr->m_visualController->scene();
scene->d_ptr->setWindowSize(QSize(width(), height()));
scene->d_ptr->setViewport(QRect(0, 0, width(), height()));
}
/*!
* \internal
*/
void Q3DWindow::exposeEvent(QExposeEvent *event)
{
Q_UNUSED(event);
if (isExposed())
d_ptr->renderNow();
}
Q3DWindowPrivate::Q3DWindowPrivate(Q3DWindow *q)
: QObject(0),
q_ptr(q),
m_updatePending(false),
m_visualController(0),
m_devicePixelRatio(1.f)
{
}
Q3DWindowPrivate::~Q3DWindowPrivate()
{
}
void Q3DWindowPrivate::render()
{
handleDevicePixelRatioChange();
m_visualController->synchDataToRenderer();
m_visualController->render();
}
void Q3DWindowPrivate::renderLater()
{
if (!m_updatePending) {
m_updatePending = true;
QCoreApplication::postEvent(q_ptr, new QEvent(QEvent::UpdateRequest));
}
}
void Q3DWindowPrivate::renderNow()
{
if (!q_ptr->isExposed())
return;
m_updatePending = false;
m_context->makeCurrent(q_ptr);
render();
m_context->swapBuffers(q_ptr);
}
void Q3DWindowPrivate::setVisualController(Abstract3DController *controller)
{
m_visualController = controller;
}
void Q3DWindowPrivate::handleDevicePixelRatioChange()
{
if (q_ptr->devicePixelRatio() == m_devicePixelRatio || !m_visualController)
return;
m_devicePixelRatio = q_ptr->devicePixelRatio();
m_visualController->scene()->setDevicePixelRatio(m_devicePixelRatio);
}
QT_DATAVISUALIZATION_END_NAMESPACE
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