diff options
Diffstat (limited to 'tests/manual/wasm/eventloop/main_noexec/main.cpp')
-rw-r--r-- | tests/manual/wasm/eventloop/main_noexec/main.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/tests/manual/wasm/eventloop/main_noexec/main.cpp b/tests/manual/wasm/eventloop/main_noexec/main.cpp new file mode 100644 index 0000000000..6ddd88bd14 --- /dev/null +++ b/tests/manual/wasm/eventloop/main_noexec/main.cpp @@ -0,0 +1,66 @@ +// Copyright (C) 2021 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only +#include <QtGui> + +// This example demonstrates how to create QGuiApplication +// without calling exec(), and then exiting main() without +// shutting down the Qt event loop. + +class ClickWindow: public QRasterWindow +{ +public: + + ClickWindow() { + qDebug() << "ClickWindow constructor"; + } + ~ClickWindow() { + qDebug() << "ClickWindow destructor"; + } + + void paintEvent(QPaintEvent *ev) override { + QPainter p(this); + p.fillRect(ev->rect(), QColorConstants::Svg::deepskyblue); + p.drawText(50, 100, "Application has started. See the developer tools console for debug output"); + } + + void mousePressEvent(QMouseEvent *) override { + qDebug() << "mousePressEvent(): calling QGuiApplication::quit()"; + QGuiApplication::quit(); + } +}; + +int main(int argc, char **argv) +{ + qDebug() << "main(): Creating QGuiApplication object"; + QGuiApplication *app = new QGuiApplication(argc, argv); + + QObject::connect(app, &QCoreApplication::aboutToQuit, [](){ + qDebug() << "QCoreApplication::aboutToQuit"; + }); + + qDebug() << "main(): Creating ClickWindow object"; + ClickWindow *window = new ClickWindow(); + window->show(); + + // We can exit main; the Qt event loop and the emscripten runtime + // will keep running, as long as Emscriptens EXIT_RUNTIME option + // has not been enabled. + + qDebug() << "main(): exit"; +} + +// Global variables are created before main() as usual, but not destroyed +class Global +{ +public: + Global() { + qDebug() << "Global constructor"; + } + ~Global() { + qDebug() << "Global destructor"; // <- will not be printed + } +}; +Global global; + + + |