Package org.gnome.gtk

Interface Editable

All Superinterfaces:
Proxy
All Known Implementing Classes:
Editable.EditableImpl, EditableLabel, Entry, EntryRow, PasswordEntry, PasswordEntryRow, SearchEntry, SpinButton, SpinRow, Text
@Generated("io.github.jwharm.JavaGI") public interface Editable extends Proxy
GtkEditable is an interface for text editing widgets.

Typical examples of editable widgets are Entry and SpinButton. 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 modify the behavior of a widget.

As an example of the latter usage, by connecting the following handler to Gtk.Editable::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 char  *text,
                      int          length,
                      int         *position,
                      gpointer     data)
 {
   char *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);
 }

Implementing GtkEditable
The most likely scenario for implementing GtkEditable on your own widget is that you will embed a GtkText inside a complex widget, and want to delegate the editable functionality to that text widget. GtkEditable provides some utility functions to make this easy.

In your class_init function, call installProperties(org.gnome.gobject.GObject.ObjectClass, int), passing the first available property ID: 

static void
 my_class_init (MyClass *class)
 {
   ...
   g_object_class_install_properties (object_class, NUM_PROPERTIES, props);
   gtk_editable_install_properties (object_clas, NUM_PROPERTIES);
   ...
 }

In your interface_init function for the GtkEditable interface, provide an implementation for the get_delegate vfunc that returns your text widget: 

GtkEditable *
 get_editable_delegate (GtkEditable *editable)
 {
   return GTK_EDITABLE (MY_WIDGET (editable)->text_widget);
 }

 static void
 my_editable_init (GtkEditableInterface *iface)
 {
   iface->get_delegate = get_editable_delegate;
 }

You don't need to provide any other vfuncs. The default implementations work by forwarding to the delegate that the GtkEditableInterface.get_delegate() vfunc returns.

In your instance_init function, create your text widget, and then call initDelegate(): 

static void
 my_widget_init (MyWidget *self)
 {
   ...
   self->text_widget = gtk_text_new ();
   gtk_editable_init_delegate (GTK_EDITABLE (self));
   ...
 }

In your dispose function, call finishDelegate() before destroying your text widget: 

static void
 my_widget_dispose (GObject *object)
 {
   ...
   gtk_editable_finish_delegate (GTK_EDITABLE (self));
   g_clear_pointer (&self->text_widget, gtk_widget_unparent);
   ...
 }

Finally, use delegateSetProperty(org.gnome.gobject.GObject, int, org.gnome.gobject.Value, org.gnome.gobject.ParamSpec) in your set_property function (and similar for get_property), to set the editable properties: 

  ...
   if (gtk_editable_delegate_set_property (object, prop_id, value, pspec))
     return;

   switch (prop_id)
   ...

It is important to note that if you create a GtkEditable that uses a delegate, the low level Gtk.Editable::insert-text and Gtk.Editable::delete-text signals will be propagated from the "wrapper" editable to the delegate, but they will not be propagated from the delegate to the "wrapper" editable, as they would cause an infinite recursion. If you wish to connect to the Gtk.Editable::insert-text and Gtk.Editable::delete-text signals, you will need to connect to them on the delegate obtained via getDelegate().