GtkEditable: GtkEditable
In RGtk2: R Bindings for Gtk 2.8.0 and Above

Description Methods and Functions Hierarchy Implementations Detailed Description Structures Signals Author(s) References

Interface for text-editing widgets

gtkEditableSelectRegion(object, start, end)
gtkEditableGetSelectionBounds(object)
gtkEditableInsertText(object, new.text, position = 0)
gtkEditableDeleteText(object, start.pos, end.pos)
gtkEditableGetChars(object, start.pos, end.pos)
gtkEditableCutClipboard(object)
gtkEditableCopyClipboard(object)
gtkEditablePasteClipboard(object)
gtkEditableDeleteSelection(object)
gtkEditableSetPosition(object, position)
gtkEditableGetPosition(object)
gtkEditableSetEditable(object, is.editable)
gtkEditableGetEditable(object)

1 2	GInterface +----GtkEditable

GtkEditable is implemented by GtkEntry, GtkOldEditable, GtkSpinButton and GtkText.

The GtkEditable interface is an interface which should be implemented by text editing widgets, such as GtkEntry and GtkText. 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.

insert_text_handler <- function(editable, text, length, position, id)
{
  result <- toupper(text)
  gSignalHandlerBlock(editable, id)
  editable$insertText(result, length, position)
  gSignalHandlerUnblock(editable, id)
}

GtkEditable: The GtkEditable structure is an opaque structure whose members cannot be directly accessed.

changed(editable, user.data)

The ::changed signal is emitted at the end of a single user-visible operation on the contents of the GtkEditable.

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 object which received the signal
user.data: user data set when the signal handler was connected.

delete-text(editable, start.pos, end.pos, user.data)

This 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 gSignalStopEmission, it is possible to modify the range of deleted text, or prevent it from being deleted entirely. The start.pos and end.pos parameters are interpreted as for gtkEditableDeleteText.

editable: the object which received the signal
start.pos: the starting position
end.pos: the end position
user.data: user data set when the signal handler was connected.

insert-text(editable, new.text, new.text.length, position, user.data)

This 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 gSignalStopEmission, it is possible to modify the inserted text, or prevent it from being inserted entirely.

editable: the object which received the signal
new.text: the new text to insert
new.text.length: the length of the new text, in bytes, or -1 if new_text is nul-terminated
position: 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.
user.data: user data set when the signal handler was connected.