抱歉，这是一个警告提示，表示gdk_screen_get_width()函数已被标记为过时。为了避免警告，您可以使用新的替代函数gdk_screen_get_width_mm()来获取屏幕的宽度（以毫米为单位）。
修改后的代码如下：
#include <gtk/gtk.h>void move_window_to_center(GtkWidget *widget, gpointer data) {GtkWindow *window = GTK_WINDOW(data);GdkScreen *screen = gtk_widget_get_screen(GTK_WIDGET(window));gint screen_width_mm = gdk_screen_get_width_mm(screen);// 将毫米转换为像素，假设每毫米有 0.0393701 像素gint screen_width_px = (gint)(screen_width_mm * 0.0393701);gint window_width, window_height;gtk_window_get_size(window, &window_width, &window_height);gint x = (screen_width_px - window_width) / 2;gint y = (screen_height_px - window_height) / 2;gtk_window_move(window, x, y);}int main(int argc, char *argv[]) {gtk_init(&argc, &argv);GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);gtk_window_set_title(GTK_WINDOW(window), "Move Window to Center");GtkWidget *button = gtk_button_new_with_label("Move Window");g_signal_connect(button, "clicked", G_CALLBACK(move_window_to_center), window);GtkWidget *box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);gtk_container_add(GTK_CONTAINER(box), button);gtk_container_add(GTK_CONTAINER(window), box);g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);gtk_widget_show_all(window);gtk_main();return 0;}
这样修改后的代码将使用gdk_screen_get_width_mm()函数获取屏幕的宽度，然后将其转换为像素。请注意，转换因子0.0393701是一个近似值，根据您的实际情况可能需要进行调整。
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