在 GTK 窗口中嵌入 QT 控件

qt-widget-in-gtk-window.cpp

#include <QApplication>
#include <QWidget>
#include <QLabel>
#include <QVBoxLayout>
#include <QWindow>
#include <QTimer>
#include <QPushButton>

#ifdef signals
  #define SIGNALS_BACKUP signals
  #undef signals
#endif

#include <gtk/gtk.h>
#include <gtk/gtkx.h>

#ifdef SAVE_SIGNALS
  #define signals SIGNALS_BACKUP
  #undef SIGNALS_BACKUP
#endif

// clang++ -o demo demo.cpp $(pkg-config --cflags --libs Qt5Widgets) $(pkg-config --cflags --libs gtk+-3.0)
int main() {
    int argc = 0;
    char **argv = { nullptr };

    // initialize
    gtk_init(&argc, &argv);
    QApplication app(argc, argv);

    GtkWidget *gwin = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(gwin), "GTK");
    g_signal_connect(G_OBJECT(gwin), "destroy", G_CALLBACK(gtk_main_quit), nullptr);

    // create gtk socket
    GtkWidget *socket = gtk_socket_new();
    gtk_widget_show(socket);
    gtk_container_add(GTK_CONTAINER(gwin), socket);
    gtk_widget_realize(socket);

    // create QWidget
    QWidget *container = new QWidget();
    QVBoxLayout *layout = new QVBoxLayout;
    QPushButton *button = new QPushButton("This is a Qt5 button");

    layout->addWidget(button);
    container->setLayout(layout);

    // embed into gtk window
    gtk_socket_add_id(GTK_SOCKET(socket), container->winId());
    container->show();

    // display
    gtk_widget_show(gwin);
    gtk_main();

    return 0;
}