SignalRun Firstediting-SignalRun Firstediting-This signal gets emitted when a cell starts to be edited.
The intended use of this signal is to do special setup
on editable, e.g. adding a Gtk.EntryCompletion or setting
up additional columns in a Gtk.ComboBox.
See gtk_cell_editable_start_editing() for information on the lifecycle of
the editable and a way to do setup that doesn’t depend on the renderer.
Note that GTK doesn't guarantee that cell renderers will
continue to use the same kind of widget for editing in future
releases, therefore you should check the type of editable
before doing any specific setup, as in the following example:
static void
text_editing_started (GtkCellRenderer *cell,
GtkCellEditable *editable,
const char *path,
gpointer data)
{
if (GTK_IS_ENTRY (editable))
{
GtkEntry *entry = GTK_ENTRY (editable);
// ... create a GtkEntryCompletion
gtk_entry_set_completion (entry, completion);
}
}
SignalDetailedActionRun FirstnotifyThe notify signal is emitted on an object when one of its properties has
its value set through g_object_set_property(), g_object_set(), et al.
Note that getting this signal doesn’t itself guarantee that the value of
the property has actually changed. When it is emitted is determined by the
derived GObject class. If the implementor did not create the property with
GObject.ParamFlags.EXPLICIT_NOTIFY, then any call to g_object_set_property() results
in ::notify being emitted, even if the new value is the same as the old.
If they did pass GObject.ParamFlags.EXPLICIT_NOTIFY, then this signal is emitted only
when they explicitly call g_object_notify() or g_object_notify_by_pspec(),
and common practice is to do that only when the value has actually changed.
This signal is typically used to obtain change notification for a
single property, by specifying the property name as a detail in the
g_signal_connect() call, like this:
g_signal_connect (text_view->buffer, "notify::paste-target-list",
G_CALLBACK (gtk_text_view_target_list_notify),
text_view)
It is important to note that you must use [canonical parameter names][class@GObject.ParamSpec#parameter-names] as detail strings for the notify signal.
This signal gets emitted when the user cancels the process of editing a cell. For example, an editable cell renderer could be written to cancel editing when the user presses Escape.
See also:
gtk_cell_renderer_stop_editing().