I'm trying to get a 4 digit input from the user but a non numeric entry is not acceptable. Instead of checking for non numeric values, can I allow the user to only enter numeric values into the GtkEntry box?
GtkWidget *entry_pin;
entry_pin=gtk_entry_new();
gtk_entry_set_max_length (GTK_ENTRY(entry_pin),4);
By the way I'm running on Ubuntu.
Antoher way is stopping the emission in a callback
#include <ctype.h>
void insert_text_event(GtkEditable *editable, const gchar *text, gint length, gint *position, gpointer data)
{
int i;
for (i = 0; i < length; i++) {
if (!isdigit(text[i])) {
g_signal_stop_emission_by_name(G_OBJECT(editable), "insert-text");
return;
}
}
}
The callback can be set as:
g_signal_connect(G_OBJECT(widget), "insert-text", G_CALLBACK(insert_text_event), NULL);