PtrArray.sortWithData

Like PtrArray.sort, but the comparison function has an extra user data argument.

Note that the comparison function for PtrArray.sortWithData doesn't take the pointers from the array as arguments, it takes pointers to the pointers in the array. Here is a full example of use:

typedef enum { SORT_NAME, SORT_SIZE } SortMode;

typedef struct
{
gchar *name;
gint size;
} FileListEntry;

static gint
sort_filelist (gconstpointer a, gconstpointer b, gpointer user_data)
{
gint order;
const SortMode sort_mode = GPOINTER_TO_INT (user_data);
const FileListEntry *entry1 = *((FileListEntry **) a);
const FileListEntry *entry2 = *((FileListEntry **) b);

switch (sort_mode)
{
case SORT_NAME:
order = g_ascii_strcasecmp (entry1->name, entry2->name);
break;
case SORT_SIZE:
order = entry1->size - entry2->size;
break;
default:
order = 0;
break;
}
return order;
}

...
g_autoptr (GPtrArray) file_list = NULL;
SortMode sort_mode;

// initialize file_list array and load with many FileListEntry entries
...
// now sort it with
sort_mode = SORT_NAME;
g_ptr_array_sort_with_data (file_list,
sort_filelist,
GINT_TO_POINTER (sort_mode));