Qt WebAssembly Progress Bar Example - Qt-webassembly Typing CST Test
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Qt WebAssembly Progress Bar Example — Qt-webassembly Code
Updates a progress bar based on a slider value.
#include <QApplication>
#include <QWidget>
#include <QSlider>
#include <QProgressBar>
#include <QVBoxLayout>
#include <Qt>
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
QWidget window;
window.setWindowTitle("Progress Bar Example");
QSlider *slider = new QSlider(Qt::Horizontal);
QProgressBar *progress = new QProgressBar();
slider->setRange(0, 100);
progress->setRange(0, 100);
QVBoxLayout *layout = new QVBoxLayout();
layout->addWidget(slider);
layout->addWidget(progress);
window.setLayout(layout);
QObject::connect(slider, &QSlider::valueChanged, [&](int value){
progress->setValue(value);
});
window.show();
return app.exec();
}Qt-webassembly Language Guide
Qt for WebAssembly allows developers to build Qt applications that run directly in web browsers using WebAssembly, without the need for plugins. It enables rich, cross-platform GUI apps to execute in modern browsers efficiently.
Primary Use Cases
- ▸Porting existing Qt desktop apps to web browsers
- ▸Building interactive web applications with Qt Quick
- ▸Creating browser-based prototypes without rewriting in JavaScript/HTML
- ▸Developing cross-platform enterprise GUI apps
- ▸Deploying games or simulation tools in browsers
Notable Features
- ▸Full Qt module support (Widgets, QML, Qt Quick, Network, Multimedia)
- ▸Runs in modern browsers with WebAssembly
- ▸Seamless integration with Qt build system (qmake/CMake)
- ▸Access to browser storage and networking APIs
- ▸Supports audio/video, 2D/3D graphics, and OpenGL/WebGL
Origin & Creator
Qt for WebAssembly was developed by The Qt Company to extend Qt’s cross-platform reach to the browser environment, leveraging WebAssembly technology.
Industrial Note
Qt-WASM is preferred for deploying desktop-quality applications on the web, rapid prototyping of UI-rich apps, and cross-platform enterprise software with shared codebases.