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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "openglwidget.h"
#include <QApplication>
#include <QPushButton>
#include <QMdiArea>
#include <QMdiSubWindow>
#include <QMenu>
#include <QMenuBar>
#include <QMainWindow>
#include <QLCDNumber>
#include <QScrollArea>
#include <QScrollBar>
#include <QTabWidget>
#include <QLabel>
#include <QTimer>
#include <QSurfaceFormat>
#include <QDebug>
#include <private/qwindow_p.h>
class Tools : public QObject
{
Q_OBJECT
public:
Tools(QWidget *root, QWidget *widgetToTurn, const QWidgetList &glwidgets)
: m_root(root), m_widgetToTurn(widgetToTurn), m_glWidgets(glwidgets) { }
void dump();
private slots:
void turnNative();
void hideShowAllGL();
void dumpCompositingStatus();
signals:
void aboutToShowGLWidgets();
private:
void dumpWidget(QWidget *w, int indent = 0);
QWidget *m_root;
QWidget *m_widgetToTurn;
QWidgetList m_glWidgets;
};
void Tools::turnNative()
{
qDebug("Turning into native");
m_widgetToTurn->winId();
dump();
}
void Tools::hideShowAllGL()
{
if (m_glWidgets[0]->isVisible()) {
qDebug("Hiding all render-to-texture widgets");
foreach (QWidget *w, m_glWidgets)
w->hide();
} else {
qDebug("Showing all render-to-texture widgets");
emit aboutToShowGLWidgets();
foreach (QWidget *w, m_glWidgets)
w->show();
}
}
void Tools::dump()
{
qDebug() << "Widget hierarchy";
dumpWidget(m_root);
qDebug() << "========";
}
void Tools::dumpWidget(QWidget *w, int indent)
{
QString indentStr;
indentStr.fill(' ', indent);
qDebug().noquote() << indentStr << w << "winId =" << w->internalWinId();
foreach (QObject *obj, w->children()) {
if (QWidget *cw = qobject_cast<QWidget *>(obj))
dumpWidget(cw, indent + 4);
}
}
void Tools::dumpCompositingStatus()
{
QWindow *w = m_root->window()->windowHandle();
qDebug() << "Compositing status for" << w << m_root->window() << "is" << QWindowPrivate::get(w)->compositing;
}
class TabWidgetResetter : public QObject
{
Q_OBJECT
public:
TabWidgetResetter(QTabWidget *tw) : m_tw(tw) { }
public slots:
void reset() { m_tw->setCurrentIndex(0); }
private:
QTabWidget *m_tw;
};
int main(int argc, char *argv[])
{
if (argc > 1 && !strcmp(argv[1], "--sharecontext")) {
qDebug("Requesting all contexts to share");
QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
}
QApplication a(argc, argv);
QSurfaceFormat format;
if (QCoreApplication::arguments().contains(QLatin1String("--multisample")))
format.setSamples(4);
if (QCoreApplication::arguments().contains(QLatin1String("--coreprofile"))) {
format.setVersion(3, 2);
format.setProfile(QSurfaceFormat::CoreProfile);
}
qDebug() << "Requesting" << format;
QMainWindow wnd;
wnd.setObjectName("Main Window");
wnd.resize(1024, 768);
QMdiArea *w = new QMdiArea;
w->setObjectName("MDI area");
w->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
wnd.setCentralWidget(w);
OpenGLWidget *glw = new OpenGLWidget(33, QVector3D(0, 0, 1));
glw->setObjectName("First GL Widget with 33 ms timer");
glw->setFormat(format);
glw->setMinimumSize(100, 100);
QMdiSubWindow *sw = w->addSubWindow(glw);
sw->setObjectName("First MDI Sub-Window");
sw->setWindowTitle("33 ms timer");
OpenGLWidget *glw2 = new OpenGLWidget(16);
glw2->setObjectName("Second GL Widget with 16 ms timer");
glw2->setFormat(format);
glw2->setMinimumSize(100, 100);
QOpenGLWidget *glw22 = new OpenGLWidget(16);
glw22->setObjectName("Second #2 GLWidget");
glw22->setParent(glw2);
glw22->resize(40, 40);
sw = w->addSubWindow(glw2);
sw->setObjectName("Second MDI Sub-Window");
sw->setWindowTitle("16 ms timer");
OpenGLWidget *glw3 = new OpenGLWidget(0); // trigger updates continuously, no timer
glw3->setObjectName("GL widget in scroll area (possibly native)");
glw3->setFormat(format);
glw3->setFixedSize(600, 600);
OpenGLWidget *glw3child = new OpenGLWidget(0);
const float glw3ClearColor[] = { 0.5f, 0.2f, 0.8f };
glw3child->setClearColor(glw3ClearColor);
glw3child->setObjectName("Child widget of GL Widget in scroll area");
glw3child->setFormat(format);
glw3child->setParent(glw3);
glw3child->setGeometry(500, 500, 100, 100); // lower right corner of parent
QScrollArea *sa = new QScrollArea;
sa->setWidget(glw3);
sa->setMinimumSize(100, 100);
sa->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
sw = w->addSubWindow(sa);
sw->setObjectName("MDI Sub-Window for scroll area");
sw->setWindowTitle("Cont. update");
sw->resize(300, 300);
sa->verticalScrollBar()->setValue(300);
QLCDNumber *lcd = new QLCDNumber;
lcd->display(1337);
lcd->setMinimumSize(300, 100);
sw = w->addSubWindow(lcd);
sw->setObjectName("MDI Sub-Window for LCD widget");
sw->setWindowTitle("Ordinary widget");
QTabWidget *tw = new QTabWidget;
QOpenGLWidget *glw4 = new OpenGLWidget(16, QVector3D(1, 0, 0));
glw4->setObjectName("GL widget in tab widget");
tw->addTab(glw4, "OpenGL");
QLabel *label = new QLabel("Another tab");
tw->addTab(label, "Not OpenGL");
tw->setMinimumSize(100, 100);
sw = w->addSubWindow(tw);
sw->setObjectName("MDI Sub-Window for tab widget");
sw->setWindowTitle("Tabs");
TabWidgetResetter twr(tw);
Tools t(&wnd, glw3, QWidgetList { glw, glw2, glw3, glw4 });
QObject::connect(&t, SIGNAL(aboutToShowGLWidgets()), &twr, SLOT(reset()));
QMenu *toolsMenu = wnd.menuBar()->addMenu("&Tools");
toolsMenu->addAction("&Turn widgets (or some parent) into native", &t, SLOT(turnNative()));
toolsMenu->addAction("&Hide/show all OpenGL widgets", &t, SLOT(hideShowAllGL()));
QTimer compStatusDumpTimer;
QObject::connect(&compStatusDumpTimer, SIGNAL(timeout()), &t, SLOT(dumpCompositingStatus()));
compStatusDumpTimer.start(5000);
wnd.show();
if (glw->isValid())
qDebug() << "Got" << glw->format();
t.dump();
return a.exec();
}
#include "main.moc"
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