Description
GtkEntryCompletion is an auxiliary object to be used in conjunction with
GtkEntry to provide the completion functionality. It implements the
GtkCellLayout interface, to allow the user to add extra cells to the
GtkTreeView with completion matches.
“Completion functionality” means that when the user modifies the text
in the entry, GtkEntryCompletion checks which rows in the model match
the current content of the entry, and displays a list of matches.
By default, the matching is done by comparing the entry text
case-insensitively against the text column of the model (see
gtk_entry_completion_set_text_column()), but this can be overridden
with a custom match function (see gtk_entry_completion_set_match_func()).
When the user selects a completion, the content of the entry is
updated. By default, the content of the entry is replaced by the
text column of the model, but this can be overridden by connecting
to the “match-selected” signal and updating the
entry in the signal handler. Note that you should return TRUE from
the signal handler to suppress the default behaviour.
To add completion functionality to an entry, use gtk_entry_set_completion().
In addition to regular completion matches, which will be inserted into the
entry when they are selected, GtkEntryCompletion also allows to display
“actions” in the popup window. Their appearance is similar to menuitems,
to differentiate them clearly from completion strings. When an action is
selected, the “action-activated” signal is emitted.
GtkEntryCompletion uses a GtkTreeModelFilter model to represent the
subset of the entire model that is currently matching. While the
GtkEntryCompletion signals “match-selected” and
“cursor-on-match” take the original model and an
iter pointing to that model as arguments, other callbacks and signals
(such as GtkCellLayoutDataFuncs or “apply-attributes”)
will generally take the filter model as argument. As long as you are
only calling gtk_tree_model_get(), this will make no difference to
you. If for some reason, you need the original model, use
gtk_tree_model_filter_get_model(). Don’t forget to use
gtk_tree_model_filter_convert_iter_to_child_iter() to obtain a
matching iter.
Functions
GtkEntryCompletionMatchFunc ()
gboolean
(*GtkEntryCompletionMatchFunc) (GtkEntryCompletion *completion,
const gchar *key,
GtkTreeIter *iter,
gpointer user_data);
A function which decides whether the row indicated by iter
matches
a given key
, and should be displayed as a possible completion for key
.
Note that key
is normalized and case-folded (see g_utf8_normalize()
and g_utf8_casefold()). If this is not appropriate, match functions
have access to the unmodified key via
gtk_entry_get_text (GTK_ENTRY (gtk_entry_completion_get_entry())).
Returns
TRUE if iter
should be displayed as a possible completion
for key
gtk_entry_completion_get_entry ()
GtkWidget *
gtk_entry_completion_get_entry (GtkEntryCompletion *completion);
Gets the entry completion
has been attached to.
Returns
The entry completion
has been attached to.
[transfer none]
Since: 2.4
gtk_entry_completion_set_model ()
void
gtk_entry_completion_set_model (GtkEntryCompletion *completion,
GtkTreeModel *model);
Sets the model for a GtkEntryCompletion. If completion
already has
a model set, it will remove it before setting the new model.
If model is NULL, then it will unset the model.
Since: 2.4
gtk_entry_completion_set_match_func ()
void
gtk_entry_completion_set_match_func (GtkEntryCompletion *completion,
GtkEntryCompletionMatchFunc func,
gpointer func_data,
GDestroyNotify func_notify);
Sets the match function for completion
to be func
. The match function
is used to determine if a row should or should not be in the completion
list.
Since: 2.4
gtk_entry_completion_set_minimum_key_length ()
void
gtk_entry_completion_set_minimum_key_length
(GtkEntryCompletion *completion,
gint length);
Requires the length of the search key for completion
to be at least
length
. This is useful for long lists, where completing using a small
key takes a lot of time and will come up with meaningless results anyway
(ie, a too large dataset).
Since: 2.4
gtk_entry_completion_get_minimum_key_length ()
gint
gtk_entry_completion_get_minimum_key_length
(GtkEntryCompletion *completion);
Returns the minimum key length as set for completion
.
Returns
The currently used minimum key length
Since: 2.4
gtk_entry_completion_compute_prefix ()
gchar *
gtk_entry_completion_compute_prefix (GtkEntryCompletion *completion,
const char *key);
Computes the common prefix that is shared by all rows in completion
that start with key
. If no row matches key
, NULL will be returned.
Note that a text column must have been set for this function to work,
see gtk_entry_completion_set_text_column() for details.
Returns
The common prefix all rows starting with
key
or NULL if no row matches key
.
[nullable][transfer full]
Since: 3.4
gtk_entry_completion_complete ()
void
gtk_entry_completion_complete (GtkEntryCompletion *completion);
Requests a completion operation, or in other words a refiltering of the
current list with completions, using the current key. The completion list
view will be updated accordingly.
Since: 2.4
gtk_entry_completion_get_completion_prefix ()
const gchar *
gtk_entry_completion_get_completion_prefix
(GtkEntryCompletion *completion);
Get the original text entered by the user that triggered
the completion or NULL if there’s no completion ongoing.
Returns
the prefix for the current completion
Since: 2.12
gtk_entry_completion_insert_prefix ()
void
gtk_entry_completion_insert_prefix (GtkEntryCompletion *completion);
Requests a prefix insertion.
Since: 2.6
gtk_entry_completion_insert_action_text ()
void
gtk_entry_completion_insert_action_text
(GtkEntryCompletion *completion,
gint index_,
const gchar *text);
Inserts an action in completion
’s action item list at position index_
with text text
. If you want the action item to have markup, use
gtk_entry_completion_insert_action_markup().
Note that index_
is a relative position in the list of actions and
the position of an action can change when deleting a different action.
Since: 2.4
gtk_entry_completion_insert_action_markup ()
void
gtk_entry_completion_insert_action_markup
(GtkEntryCompletion *completion,
gint index_,
const gchar *markup);
Inserts an action in completion
’s action item list at position index_
with markup markup
.
Since: 2.4
gtk_entry_completion_delete_action ()
void
gtk_entry_completion_delete_action (GtkEntryCompletion *completion,
gint index_);
Deletes the action at index_
from completion
’s action list.
Note that index_
is a relative position and the position of an
action may have changed since it was inserted.
Since: 2.4
gtk_entry_completion_set_text_column ()
void
gtk_entry_completion_set_text_column (GtkEntryCompletion *completion,
gint column);
Convenience function for setting up the most used case of this code: a
completion list with just strings. This function will set up completion
to have a list displaying all (and just) strings in the completion list,
and to get those strings from column
in the model of completion
.
This functions creates and adds a GtkCellRendererText for the selected
column. If you need to set the text column, but don't want the cell
renderer, use g_object_set() to set the “text-column”
property directly.
Since: 2.4
gtk_entry_completion_get_text_column ()
gint
gtk_entry_completion_get_text_column (GtkEntryCompletion *completion);
Returns the column in the model of completion
to get strings from.
Returns
the column containing the strings
Since: 2.6
gtk_entry_completion_set_inline_completion ()
void
gtk_entry_completion_set_inline_completion
(GtkEntryCompletion *completion,
gboolean inline_completion);
Sets whether the common prefix of the possible completions should
be automatically inserted in the entry.
Since: 2.6
gtk_entry_completion_get_inline_completion ()
gboolean
gtk_entry_completion_get_inline_completion
(GtkEntryCompletion *completion);
Returns whether the common prefix of the possible completions should
be automatically inserted in the entry.
Returns
TRUE if inline completion is turned on
Since: 2.6
gtk_entry_completion_set_inline_selection ()
void
gtk_entry_completion_set_inline_selection
(GtkEntryCompletion *completion,
gboolean inline_selection);
Sets whether it is possible to cycle through the possible completions
inside the entry.
Since: 2.12
gtk_entry_completion_get_inline_selection ()
gboolean
gtk_entry_completion_get_inline_selection
(GtkEntryCompletion *completion);
Returns TRUE if inline-selection mode is turned on.
Returns
TRUE if inline-selection mode is on
Since: 2.12
gtk_entry_completion_set_popup_completion ()
void
gtk_entry_completion_set_popup_completion
(GtkEntryCompletion *completion,
gboolean popup_completion);
Sets whether the completions should be presented in a popup window.
Since: 2.6
gtk_entry_completion_get_popup_completion ()
gboolean
gtk_entry_completion_get_popup_completion
(GtkEntryCompletion *completion);
Returns whether the completions should be presented in a popup window.
Returns
TRUE if popup completion is turned on
Since: 2.6
gtk_entry_completion_set_popup_set_width ()
void
gtk_entry_completion_set_popup_set_width
(GtkEntryCompletion *completion,
gboolean popup_set_width);
Sets whether the completion popup window will be resized to be the same
width as the entry.
Since: 2.8
gtk_entry_completion_get_popup_set_width ()
gboolean
gtk_entry_completion_get_popup_set_width
(GtkEntryCompletion *completion);
Returns whether the completion popup window will be resized to the
width of the entry.
Returns
TRUE if the popup window will be resized to the width of
the entry
Since: 2.8
gtk_entry_completion_set_popup_single_match ()
void
gtk_entry_completion_set_popup_single_match
(GtkEntryCompletion *completion,
gboolean popup_single_match);
Sets whether the completion popup window will appear even if there is
only a single match. You may want to set this to FALSE if you
are using inline completion.
Since: 2.8
gtk_entry_completion_get_popup_single_match ()
gboolean
gtk_entry_completion_get_popup_single_match
(GtkEntryCompletion *completion);
Returns whether the completion popup window will appear even if there is
only a single match.
Returns
TRUE if the popup window will appear regardless of the
number of matches
Since: 2.8
Property Details
The “inline-completion” property
“inline-completion” gboolean
Determines whether the common prefix of the possible completions
should be inserted automatically in the entry. Note that this
requires text-column to be set, even if you are using a custom
match function.
Owner: GtkEntryCompletion
Flags: Read / Write
Default value: FALSE
Since: 2.6
The “inline-selection” property
“inline-selection” gboolean
Determines whether the possible completions on the popup
will appear in the entry as you navigate through them.
Owner: GtkEntryCompletion
Flags: Read / Write
Default value: FALSE
Since: 2.12
The “minimum-key-length” property
“minimum-key-length” gint
Minimum length of the search key in order to look up matches.
Owner: GtkEntryCompletion
Flags: Read / Write
Allowed values: >= 0
Default value: 1
The “model” property
“model” GtkTreeModel *
The model to find matches in.
Owner: GtkEntryCompletion
Flags: Read / Write
The “popup-completion” property
“popup-completion” gboolean
Determines whether the possible completions should be
shown in a popup window.
Owner: GtkEntryCompletion
Flags: Read / Write
Default value: TRUE
Since: 2.6
The “popup-set-width” property
“popup-set-width” gboolean
Determines whether the completions popup window will be
resized to the width of the entry.
Owner: GtkEntryCompletion
Flags: Read / Write
Default value: TRUE
Since: 2.8
The “popup-single-match” property
“popup-single-match” gboolean
Determines whether the completions popup window will shown
for a single possible completion. You probably want to set
this to FALSE if you are using
inline completion.
Owner: GtkEntryCompletion
Flags: Read / Write
Default value: TRUE
Since: 2.8
The “text-column” property
“text-column” gint
The column of the model containing the strings.
Note that the strings must be UTF-8.
Owner: GtkEntryCompletion
Flags: Read / Write
Allowed values: >= -1
Default value: -1
Since: 2.6
Signal Details
The “insert-prefix” signal
gboolean
user_function (GtkEntryCompletion *widget,
gchar *prefix,
gpointer user_data)
Gets emitted when the inline autocompletion is triggered.
The default behaviour is to make the entry display the
whole prefix and select the newly inserted part.
Applications may connect to this signal in order to insert only a
smaller part of the prefix
into the entry - e.g. the entry used in
the GtkFileChooser inserts only the part of the prefix up to the
next '/'.
Returns
TRUE if the signal has been handled
Flags: Run Last
Since: 2.6
The “no-matches” signal
void
user_function (GtkEntryCompletion *widget,
gpointer user_data)
Gets emitted when the filter model has zero
number of rows in completion_complete method.
(In other words when GtkEntryCompletion is out of
suggestions)
Flags: Run Last
Since: 3.14