Details
gtk_im_context_set_client_window ()
Set the client window for the input context; this is the
GdkWindow in which the input appears. This window is
used in order to correctly position status windows, and may
also be used for purposes internal to the input method.
gtk_im_context_get_preedit_string ()
void gtk_im_context_get_preedit_string
(GtkIMContext *context,
gchar **str,
PangoAttrList **attrs,
gint *cursor_pos); |
Retrieve the current preedit string for the input context,
and a list of attributes to apply to the string.
This string should be displayed inserted at the insertion
point.
gtk_im_context_filter_keypress ()
Allow an input method to internally handle a key press event.
If this function returns TRUE, then no further processing
should be done for this keystroke.
gtk_im_context_focus_in ()
Notify the input method that the widget to which this
input context corresponds has lost gained. The input method
may, for example, change the displayed feedback to reflect
this change.
gtk_im_context_focus_out ()
Notify the input method that the widget to which this
input context corresponds has lost focus. The input method
may, for example, change the displayed feedback or reset the contexts
state to reflect this change.
gtk_im_context_reset ()
Notify the input method that a change such as a change in cursor
position has been made. This will typically cause the input
method to clear the preedit state.
gtk_im_context_set_cursor_location ()
Notify the input method that a change in cursor
position has been made.
gtk_im_context_set_use_preedit ()
void gtk_im_context_set_use_preedit (GtkIMContext *context,
gboolean use_preedit); |
Sets whether the IM context should use the preedit string
to display feedback. If use_preedit is FALSE (default
is TRUE), then the IM context may use some other method to display
feedback, such as displaying it in a child of the root window.
gtk_im_context_set_surrounding ()
void gtk_im_context_set_surrounding (GtkIMContext *context,
const gchar *text,
gint len,
gint cursor_index); |
Sets surrounding context around the insertion point and preedit
string. This function is expected to be called in response to the
GtkIMContext::retrieve_context signal, and will likely have no
effect if called at other times.
gtk_im_context_get_surrounding ()
gboolean gtk_im_context_get_surrounding (GtkIMContext *context,
gchar **text,
gint *cursor_index); |
Retrieves context around the insertion point. Input methods
typically want context in order to constrain input text based on
existing text; this is important for languages such as Thai where
only some sequences of characters are allowed.
This function is implemented by emitting the
GtkIMContext::retrieve_context signal on the input method; in
response to this signal, a widget should provide as much context as
is available, up to an entire paragraph, by calling
gtk_im_context_set_surrounding(). Note that there is no obligation
for a widget to respond to the ::retrieve_context signal, so input
methods must be prepared to function without context.
gtk_im_context_delete_surrounding ()
gboolean gtk_im_context_delete_surrounding
(GtkIMContext *context,
gint offset,
gint n_chars); |
Asks the widget that the input context is attached to to delete
characters around the cursor position by emitting the
GtkIMContext::delete_context signal. Note that offset and n_chars
are in characters not in bytes, which differs from the usage other
places in GtkIMContext.
In order to use this function, you should first call
gtk_im_context_get_surrounding() to get the current context, and
call this function immediately afterwards to make sure that you
know what you are deleting. You should also account for the fact
that even if the signal was handled, the input context might not
have deleted all the characters that were requested to be deleted.
This function is used by an input method that wants to make
subsitutions in the existing text in response to new input. It is
not useful for applications.