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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtGui>
#include <QtWidgets>
#include <emscripten/bind.h>
#include <emscripten/val.h>
using namespace emscripten;
class FontViewer : public QWidget
{
public:
FontViewer() {
QTextEdit *edit = new QTextEdit;
edit->setPlainText("The quick brown fox jumps over the lazy dog\nHow quickly daft jumping zebras vex\nPack my box with five dozen liquor jugs");
QComboBox *combo = new QComboBox;
combo->addItems(QFontDatabase::families());
connect(combo, &QComboBox::currentTextChanged, [=](const QString &family) {
QFont font(family);
edit->setFont(font);
});
QObject::connect(qApp, &QGuiApplication::fontDatabaseChanged, [=]() {
QStringList families = QFontDatabase::families();
combo->clear();
combo->addItems(families);
});
QLayout *layout = new QVBoxLayout;
layout->addWidget(edit);
layout->addWidget(combo);
setLayout(layout);
}
};
FontViewer *g_viewer = nullptr;
QApplication *g_app = nullptr;
void deleteapp() {
delete g_viewer;
delete g_app;
};
EMSCRIPTEN_BINDINGS(fonloading) {
function("deleteapp", &deleteapp);
}
int main(int argc, char **argv)
{
qDebug() << "C++ main: Creating application";
g_app = new QApplication(argc, argv);
// Make sure there is one call to fontFamiliesLoaded at startup,
// even if no further fonts are loaded.
QTimer::singleShot(0, [=]() {
emscripten::val window = emscripten::val::global("window");
window.call<void>("fontFamiliesLoaded", QFontDatabase::families().count());
});
g_viewer = new FontViewer();
g_viewer->show();
QObject::connect(g_app, &QGuiApplication::fontDatabaseChanged, [=]() {
QStringList families = QFontDatabase::families();
emscripten::val window = emscripten::val::global("window");
window.call<void>("fontFamiliesLoaded", families.count());
for (int i = 0; i < families.count(); ++i) {
window.call<void>("fontFamilyLoaded", families[i].toStdString());
}
});
}