Simplified, shortened version of http://unix.stackexchange.com/a/163115/1131, a clipboard dump tool

CMakeLists.txt

cmake_minimum_required(VERSION 3.0.0)
project(xclipshow)
find_package(Qt5Widgets)
set(CMAKE_AUTOMOC ON)
set(CMAKE_INCLUDE_CURRENT_DIR ON)

add_definitions(-std=c++11)
add_executable(xclipshow
    xclipshow.cpp
    )
qt5_use_modules(xclipshow Widgets Core)

xclipshow.cpp

// source: http://unix.stackexchange.com/a/163115/1131
// GS, 2016-01-27, simplify the code a little bit

#include <QApplication>
#include <QTimer>
#include <QClipboard>
#include <QMimeData>
#include <QDebug>
#include <string>
#include <iostream>
#include <iomanip>
using namespace std;

static void qtmain()
{
    QClipboard *clip = QApplication::clipboard();

    for (QString &formatName: clip->mimeData()->formats()) {
        string s(formatName.toStdString());

        QByteArray arr(clip->mimeData()->data(formatName));
        cout << "name=" << s << ", size=" << arr.size() << ' ';

        cout << setw(2) << setfill('0') << hex;
        for (auto b : arr)
          cout << static_cast<unsigned>(static_cast<unsigned char>(b)) << ' ';
        cout << setw(0) << dec << '\n';
    }
}

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    QTimer::singleShot(0, []() { qtmain(); QApplication::quit(); } );
    return app.exec();
}