g-object, common-lisp:standard-object, common-lisp:t

gtk-entry, gtk-search-entry, gtk-spin-button

The gtk-editable interface is an interface which should be implemented by text editing widgets, such as gtk-entry and gtk-spin-button. It contains functions for generically manipulating an editable widget, a large number of action signals used for key bindings, and several signals that an application can connect to to modify the behavior of a widget. As an example of the latter usage, by connecting the following handler to "insert-text", an application can convert all entry into a widget into uppercase.

Forcing entry to uppercase.

 #include <ctype.h>


 void
 insert_text_handler (GtkEditable *editable,
                      const gchar *text,
                      gint         length,
                      gint        *position,
                      gpointer     data)
 {
   gchar *result = g_utf8_strup (text, length);


   g_signal_handlers_block_by_func (editable,
                                (gpointer) insert_text_handler, data);
   gtk_editable_insert_text (editable, result, length, position);
   g_signal_handlers_unblock_by_func (editable,
                                      (gpointer) insert_text_handler, data);


   g_signal_stop_emission_by_name (editable, "insert_text");


   g_free (result);
 }    

The "changed" signal

 lambda (editable)    : Run Last      

The "changed" signal is emitted at the end of a single user visible operation on the contents of the gtk-editable.

E.g., a paste operation that replaces the contents of the selection will cause only one signal emission, even though it is implemented by first deleting the selection, then inserting the new content, and may cause multiple "notify::text" signals to be emitted.

editable

The gtk-editable widget which received the signal.

The "delete-text" signal

 lambda (editable start end)    :run-last      

The signal is emitted when text is deleted from the widget by the user. The default handler for this signal will normally be responsible for deleting the text, so by connecting to this signal and then stopping the signal with the g-signal-stop-emission function, it is possible to modify the range of deleted text, or prevent it from being deleted entirely. The start and end parameters are interpreted as for the gtk-editable-delete-text function.

editable

The gtk-editable widget which received the signal.

start

An integer with the starting position.

end

An integer with the end position.

The "insert-text" signal

 lambda (editable text length position)    :run-last      

The signal is emitted when text is inserted into the widget by the user. The default handler for this signal will normally be responsible for inserting the text, so by connecting to this signal and then stopping the signal with the g-signal-stop-emission function, it is possible to modify the inserted text, or prevent it from being inserted entirely.

editable

The gtk-editable widget which received the signal.

text

A string with the new text to insert.

length

An integer with the length of the new text, in bytes, or -1 if text is nul-terminated.

position

A pointer to the position, in characters, at which to insert the new text. This is an in-out parameter. After the signal emission is finished, it should point after the newly inserted text.