Assertion 'GTK_IS_ENTRY (entry)' failed

Platform
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2

The Entries array is local to your activate() function; you cannot use it inside the print_text() callback.

If you want to set up an array of entries and use it inside a callback, you’ll have to allocate it, like:

GtkEntry **entries = g_new (GtkEntry*, 2);

entries[0] = GTK_ENTRY (EntryIn);
entries[1] = GTK_ENTRY (EntryOut);

Or you can use one of the array containers inside GLib, like GPtrArray:

GPtrArray *entries = g_ptr_array_new ();

g_ptr_array_add (entries, EntryIn);
g_ptr_array_add (entries, EntryOut);

and then either use the pdata field to access the entry, or the convenience g_ptr_array_index() macro:

GPtrArray *entries = user_data;
GtkEntry *entryIn = entries->pdata[0]; // or g_ptr_array_index (entries, 0)
GtkEntry *entryOut = entries->pdata[1]; // or g_ptr_array_index (entries, 1)
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