hyperion.ng/src/hyperion-x11/X11Wrapper.h

// QT includes
#include <QTimer>

// Hyperion-X11 includes
#include <grabber/X11Grabber.h>

class X11Wrapper : public QObject
{
    Q_OBJECT
public:
    X11Wrapper(int grabInterval, int cropLeft, int cropRight, int cropTop, int cropBottom, int horizontalPixelDecimation, int verticalPixelDecimation);

    const Image<ColorRgb> & getScreenshot();

    ///
    /// Starts the timed capturing of screenshots
    ///
    void start();

    void stop();
    
    bool displayInit();

signals:
    void sig_screenshot(const Image<ColorRgb> & screenshot);

private slots:
    ///
    /// Performs a single screenshot capture and publishes the capture screenshot on the screenshot
    /// signal.
    ///
    void capture();

private:
    /// The QT timer to generate capture-publish events
    QTimer _timer;

    /// The grabber for creating screenshots
    X11Grabber _grabber;
};