onyx_example.cpp

#include "onyx/screen_proxy.h"
#include "onyx/sys_status_public.h"

/// Create my own widget.
class MyWidget : public QWidget
{
public:
    MyWidget(QWidget *parent = 0) : QWidget(parent) {}
    ~MyWidget() {}

public:
    void refreshScreen()
    {
        onyx::screen::ScreenProxy::instance().flush(this, onyx::screen::GC);
    }

private:
    void paintEvent(QPaintEvent *e)
    {
        QPainter painter(this);
        QFont font("", 20, QFont::Normal);
        painter.setFont(font);
        painter.drawText(rect(), Qt::AlignCenter, tr("Hello World From Onyx."));
    }
};

int main(int argc, char* argv[])

{
    QApplication app(argc, argv);

    // Important to tell system that it’s not busy now, otherwise screen proxy
    // would not work.
    sys::SysStatus::instance().setSystemBusy(false);
    MyWidget main_window;
    main_window.show();

    // Refresh eInk screen.
    main_window.refreshScreen();
    return app.exec();
}