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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include "fbitem.h"
#include <QVBoxLayout>
#include <QGroupBox>
#include <QRadioButton>
#include <QCheckBox>
#include <QLabel>
#include <QQuickItem>
MainWindow::MainWindow(bool transparency, bool noRenderAlpha)
: m_currentView(nullptr),
m_currentRootObject(nullptr),
m_transparent(transparency),
m_noRenderAlpha(noRenderAlpha)
{
auto *layout = new QVBoxLayout;
QGroupBox *groupBox = new QGroupBox(tr("Type"));
auto *vbox = new QVBoxLayout;
m_radioView = new QRadioButton(tr("QQuickView in a window container (direct)"));
m_radioWidget = new QRadioButton(tr("QQuickWidget (indirect through framebuffer objects)"));
vbox->addWidget(m_radioWidget);
vbox->addWidget(m_radioView);
m_radioWidget->setChecked(true);
m_state = Unknown;
connect(m_radioWidget, &QRadioButton::toggled, this, &MainWindow::updateView);
connect(m_radioView, &QRadioButton::toggled, this, &MainWindow::updateView);
groupBox->setLayout(vbox);
layout->addWidget(groupBox);
m_checkboxMultiSample = new QCheckBox(tr("Multisample (4x)"));
connect(m_checkboxMultiSample, &QCheckBox::toggled, this, &MainWindow::updateView);
layout->addWidget(m_checkboxMultiSample);
m_labelStatus = new QLabel;
layout->addWidget(m_labelStatus);
QWidget *quickContainer = new QWidget;
layout->addWidget(quickContainer);
layout->setStretchFactor(quickContainer, 8);
m_containerLayout = new QVBoxLayout;
quickContainer->setLayout(m_containerLayout);
// Add an overlay widget to demonstrate that it will _not_ work with
// QQuickView, whereas it is perfectly fine with QQuickWidget.
QPalette semiTransparent(QColor(255,0,0,128));
semiTransparent.setBrush(QPalette::Text, Qt::white);
semiTransparent.setBrush(QPalette::WindowText, Qt::white);
m_overlayLabel = new QLabel("This is a\nsemi-transparent\n overlay widget\nwhich is placed\non top\n of the Quick\ncontent.", this);
m_overlayLabel->setAlignment(Qt::AlignHCenter | Qt::AlignTop);
m_overlayLabel->setAutoFillBackground(true);
m_overlayLabel->setPalette(semiTransparent);
QFont f = font();
f.setPixelSize(QFontInfo(f).pixelSize()*2);
f.setWeight(QFont::Bold);
m_overlayLabel->setFont(f);
m_overlayLabel->hide();
m_checkboxOverlayVisible = new QCheckBox(tr("Show widget overlay"));
connect(m_checkboxOverlayVisible, &QCheckBox::toggled, m_overlayLabel, &QWidget::setVisible);
layout->addWidget(m_checkboxOverlayVisible);
setLayout(layout);
updateView();
}
void MainWindow::resizeEvent(QResizeEvent*)
{
int margin = width() / 10;
int top = m_checkboxMultiSample->y();
int bottom = m_checkboxOverlayVisible->geometry().bottom();
m_overlayLabel->setGeometry(margin, top, width() - 2 * margin, bottom - top);
}
void MainWindow::switchTo(QWidget *view)
{
if (m_containerLayout->count())
m_containerLayout->takeAt(0);
delete m_currentView;
m_currentView = view;
m_containerLayout->addWidget(m_currentView);
m_currentView->setFocus();
}
void MainWindow::updateView()
{
QSurfaceFormat format;
format.setDepthBufferSize(16);
format.setStencilBufferSize(8);
if (m_transparent)
format.setAlphaBufferSize(8);
if (m_checkboxMultiSample->isChecked())
format.setSamples(4);
State state = m_radioView->isChecked() ? UseWindow : UseWidget;
if (m_format == format && m_state == state)
return;
m_format = format;
m_state = state;
QString text = m_currentRootObject
? m_currentRootObject->property("currentText").toString()
: QStringLiteral("Hello Qt");
QUrl source("qrc:qquickwidgetversuswindow_opengl/test.qml");
if (m_state == UseWindow) {
auto *quickView = new QQuickView;
// m_transparent is not supported here since many systems have problems with semi-transparent child windows
quickView->setFormat(m_format);
quickView->setResizeMode(QQuickView::SizeRootObjectToView);
connect(quickView, &QQuickView::statusChanged, this, &MainWindow::onStatusChangedView);
connect(quickView, &QQuickView::sceneGraphError, this, &MainWindow::onSceneGraphError);
quickView->setSource(source);
m_currentRootObject = quickView->rootObject();
switchTo(QWidget::createWindowContainer(quickView));
} else if (m_state == UseWidget) {
auto *quickWidget = new QQuickWidget;
if (m_transparent)
quickWidget->setClearColor(Qt::transparent);
quickWidget->setFormat(m_format);
quickWidget->setResizeMode(QQuickWidget::SizeRootObjectToView);
connect(quickWidget, &QQuickWidget::statusChanged, this, &MainWindow::onStatusChangedWidget);
connect(quickWidget, &QQuickWidget::sceneGraphError, this, &MainWindow::onSceneGraphError);
quickWidget->setSource(source);
switchTo(quickWidget);
m_currentRootObject = quickWidget->rootObject();
}
if (m_currentRootObject) {
m_currentRootObject->setProperty("currentText", text);
m_currentRootObject->setProperty("multisample", m_checkboxMultiSample->isChecked());
if (!m_noRenderAlpha)
m_currentRootObject->setProperty("translucency", m_transparent);
}
m_overlayLabel->raise();
}
void MainWindow::onStatusChangedView(QQuickView::Status status)
{
QString s;
switch (status) {
case QQuickView::Null:
s = tr("Null");
break;
case QQuickView::Ready:
s = tr("Ready");
break;
case QQuickView::Loading:
s = tr("Loading");
break;
case QQuickView::Error:
s = tr("Error");
break;
default:
s = tr("Unknown");
break;
}
m_labelStatus->setText(tr("QQuickView status: %1").arg(s));
}
void MainWindow::onStatusChangedWidget(QQuickWidget::Status status)
{
QString s;
switch (status) {
case QQuickWidget::Null:
s = tr("Null");
break;
case QQuickWidget::Ready:
s = tr("Ready");
break;
case QQuickWidget::Loading:
s = tr("Loading");
break;
case QQuickWidget::Error:
s = tr("Error");
break;
default:
s = tr("Unknown");
break;
}
m_labelStatus->setText(tr("QQuickWidget status: %1").arg(s));
}
void MainWindow::onSceneGraphError(QQuickWindow::SceneGraphError error, const QString &message)
{
m_labelStatus->setText(tr("Scenegraph error %1: %2").arg(error).arg(message));
}
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