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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QApplication>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QSlider>
#include <QTextEdit>
#include <QPushButton>
#include <QLabel>
#include <QCheckBox>
#include <QFileDialog>
#include <QFontInfo>
#include <QMouseEvent>
#include <QDrag>
#include <QMimeData>
#include "examplewidget.h"
int main(int argc, char **argv)
{
QApplication app(argc, argv);
QVBoxLayout *layout = new QVBoxLayout;
ExampleRhiWidget *rhiWidget = new ExampleRhiWidget;
QLabel *overlayLabel = new QLabel(rhiWidget);
overlayLabel->setText(QObject::tr("This is a\nsemi-transparent\n overlay widget\n"
"placed on top of\nthe QRhiWidget."));
overlayLabel->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
overlayLabel->setAutoFillBackground(true);
QPalette semiTransparent(QColor(255, 0, 0, 64));
semiTransparent.setBrush(QPalette::Text, Qt::white);
semiTransparent.setBrush(QPalette::WindowText, Qt::white);
overlayLabel->setPalette(semiTransparent);
QFont f = overlayLabel->font();
f.setPixelSize(QFontInfo(f).pixelSize() * 2);
f.setWeight(QFont::Bold);
overlayLabel->setFont(f);
overlayLabel->resize(320, 320);
overlayLabel->hide();
QObject::connect(rhiWidget, &ExampleRhiWidget::resized, rhiWidget, [rhiWidget, overlayLabel] {
const int w = overlayLabel->width();
const int h = overlayLabel->height();
overlayLabel->setGeometry(rhiWidget->width() / 2 - w / 2, rhiWidget->height() / 2 - h / 2, w, h);
});
QTextEdit *edit = new QTextEdit(QObject::tr("QRhiWidget!<br><br>"
"The cube is textured with QPainter-generated content.<br><br>"
"Regular, non-native widgets on top work just fine."));
QObject::connect(edit, &QTextEdit::textChanged, edit, [edit, rhiWidget] {
rhiWidget->setCubeTextureText(edit->toPlainText());
});
edit->setMaximumHeight(100);
layout->addWidget(edit);
QSlider *slider = new QSlider(Qt::Horizontal);
slider->setMinimum(0);
slider->setMaximum(360);
QObject::connect(slider, &QSlider::valueChanged, slider, [slider, rhiWidget] {
rhiWidget->setCubeRotation(slider->value());
});
QHBoxLayout *sliderLayout = new QHBoxLayout;
sliderLayout->addWidget(new QLabel(QObject::tr("Cube rotation")));
sliderLayout->addWidget(slider);
layout->addLayout(sliderLayout);
QHBoxLayout *btnLayout = new QHBoxLayout;
QLabel *apiLabel = new QLabel;
btnLayout->addWidget(apiLabel);
QObject::connect(rhiWidget, &ExampleRhiWidget::rhiChanged, rhiWidget, [apiLabel](const QString &apiName) {
apiLabel->setText(QObject::tr("Using QRhi on ") + apiName);
});
QPushButton *btnMakeWindow = new QPushButton(QObject::tr("Make top-level window"));
QObject::connect(btnMakeWindow, &QPushButton::clicked, btnMakeWindow, [rhiWidget, btnMakeWindow, layout] {
if (rhiWidget->parentWidget()) {
rhiWidget->setParent(nullptr);
rhiWidget->setAttribute(Qt::WA_DeleteOnClose, true);
rhiWidget->show();
btnMakeWindow->setText(QObject::tr("Make child widget"));
} else {
rhiWidget->setAttribute(Qt::WA_DeleteOnClose, false);
layout->addWidget(rhiWidget);
btnMakeWindow->setText(QObject::tr("Make top-level window"));
}
});
btnLayout->addWidget(btnMakeWindow);
QPushButton *btn = new QPushButton(QObject::tr("Grab to image"));
QObject::connect(btn, &QPushButton::clicked, btn, [rhiWidget] {
QImage image = rhiWidget->grabFramebuffer();
qDebug() << "Got image" << image;
if (!image.isNull()) {
QFileDialog fd(rhiWidget->parentWidget());
fd.setAcceptMode(QFileDialog::AcceptSave);
fd.setDefaultSuffix("png");
fd.selectFile("test.png");
if (fd.exec() == QDialog::Accepted)
image.save(fd.selectedFiles().first());
}
});
btnLayout->addWidget(btn);
QCheckBox *cbMsaa = new QCheckBox(QObject::tr("Use 4x MSAA"));
QObject::connect(cbMsaa, &QCheckBox::stateChanged, cbMsaa, [cbMsaa, rhiWidget] {
if (cbMsaa->isChecked())
rhiWidget->setSampleCount(4);
else
rhiWidget->setSampleCount(1);
});
btnLayout->addWidget(cbMsaa);
QCheckBox *cbOvberlay = new QCheckBox(QObject::tr("Show overlay widget"));
QObject::connect(cbOvberlay, &QCheckBox::stateChanged, cbOvberlay, [cbOvberlay, overlayLabel] {
if (cbOvberlay->isChecked())
overlayLabel->setVisible(true);
else
overlayLabel->setVisible(false);
});
btnLayout->addWidget(cbOvberlay);
QCheckBox *cbFlip = new QCheckBox(QObject::tr("Flip"));
QObject::connect(cbFlip, &QCheckBox::stateChanged, cbOvberlay, [cbFlip, rhiWidget] {
rhiWidget->setMirrorVertically(cbFlip->isChecked());
});
btnLayout->addWidget(cbFlip);
QCheckBox *cbFixedSize = new QCheckBox(QObject::tr("Use fixed color buffer size"));
btnLayout->addWidget(cbFixedSize);
QSlider *fixedSizeSlider = new QSlider(Qt::Horizontal);
fixedSizeSlider->setMinimum(16);
fixedSizeSlider->setMaximum(512);
btnLayout->addWidget(fixedSizeSlider);
QObject::connect(cbFixedSize, &QCheckBox::stateChanged, cbFixedSize, [cbFixedSize, fixedSizeSlider, rhiWidget] {
if (cbFixedSize->isChecked())
rhiWidget->setFixedColorBufferSize(QSize(fixedSizeSlider->value(), fixedSizeSlider->value()));
else
rhiWidget->setFixedColorBufferSize(QSize());
});
QObject::connect(fixedSizeSlider, &QSlider::valueChanged, fixedSizeSlider, [fixedSizeSlider, cbFixedSize, rhiWidget] {
if (cbFixedSize->isChecked())
rhiWidget->setFixedColorBufferSize(QSize(fixedSizeSlider->value(), fixedSizeSlider->value()));
});
// Exit when the detached window is closed; there is not much we can do
// with the controls in the main window then.
QObject::connect(rhiWidget, &QObject::destroyed, rhiWidget, [rhiWidget] {
if (!rhiWidget->parentWidget())
qGuiApp->quit();
});
layout->addLayout(btnLayout);
layout->addWidget(rhiWidget);
rhiWidget->setCubeTextureText(edit->toPlainText());
QWidget w;
w.setLayout(layout);
w.resize(1280, 720);
w.show();
return app.exec();
}
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