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gtk2/gtk/gtkcomboboxtext.c

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/* GTK - The GIMP Toolkit
*
* Copyright (C) 2010 Christian Dywan
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcomboboxtext.h"
#include "gtkcombobox.h"
#include "gtkcellrenderertext.h"
#include "gtkcelllayout.h"
#include "gtkbuildable.h"
#include "gtkbuilderprivate.h"
#include <string.h>
/**
* SECTION:gtkcomboboxtext
* @Short_description: A simple, text-only combo box
* @Title: GtkComboBoxText
* @See_also: #GtkComboBox
*
* A GtkComboBoxText is a simple variant of #GtkComboBox that hides
* the model-view complexity for simple text-only use cases.
*
* To create a GtkComboBoxText, use gtk_combo_box_text_new() or
* gtk_combo_box_text_new_with_entry().
*
* You can add items to a GtkComboBoxText with
* gtk_combo_box_text_append_text(), gtk_combo_box_text_insert_text()
* or gtk_combo_box_text_prepend_text() and remove options with
* gtk_combo_box_text_remove().
*
* If the GtkComboBoxText contains an entry (via the 'has-entry' property),
* its contents can be retrieved using gtk_combo_box_text_get_active_text().
* The entry itself can be accessed by calling gtk_bin_get_child() on the
* combo box.
*
* You should not call gtk_combo_box_set_model() or attempt to pack more cells
* into this combo box via its GtkCellLayout interface.
*
* <refsect2 id="GtkComboBoxText-BUILDER-UI">
* <title>GtkComboBoxText as GtkBuildable</title>
* <para>
* The GtkComboBoxText implementation of the GtkBuildable interface
* supports adding items directly using the &lt;items&gt; element
* and specifying &lt;item&gt; elements for each item. Each &lt;item&gt;
* element can specify the "id" corresponding to the appended text and
* also supports the regular translation attributes "translatable",
* "context" and "comments".
*
* <example>
* <title>A UI definition fragment specifying GtkComboBoxText items</title>
* |[
* <object class="GtkComboBoxText">
* <items>
* <item translatable="yes" id="factory">Factory</item>
* <item translatable="yes" id="home">Home</item>
* <item translatable="yes" id="subway">Subway</item>
* </items>
* </object>
* ]|
* </example>
* </para>
* </refsect2>
*/
static void gtk_combo_box_text_buildable_interface_init (GtkBuildableIface *iface);
static gboolean gtk_combo_box_text_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GMarkupParser *parser,
gpointer *data);
static void gtk_combo_box_text_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer user_data);
static GtkBuildableIface *buildable_parent_iface = NULL;
G_DEFINE_TYPE_WITH_CODE (GtkComboBoxText, gtk_combo_box_text, GTK_TYPE_COMBO_BOX,
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_combo_box_text_buildable_interface_init));
static GObject *
gtk_combo_box_text_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_properties)
{
GObject *object;
const gint text_column = 0;
object = G_OBJECT_CLASS (gtk_combo_box_text_parent_class)->constructor
(type, n_construct_properties, construct_properties);
gtk_combo_box_set_entry_text_column (GTK_COMBO_BOX (object), text_column);
gtk_combo_box_set_id_column (GTK_COMBO_BOX (object), 1);
if (!gtk_combo_box_get_has_entry (GTK_COMBO_BOX (object)))
{
GtkCellRenderer *cell;
cell = gtk_cell_renderer_text_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (object), cell, TRUE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (object), cell,
"text", text_column,
NULL);
}
return object;
}
static void
gtk_combo_box_text_init (GtkComboBoxText *combo_box)
{
GtkListStore *store;
store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);
gtk_combo_box_set_model (GTK_COMBO_BOX (combo_box), GTK_TREE_MODEL (store));
g_object_unref (store);
}
static void
gtk_combo_box_text_class_init (GtkComboBoxTextClass *klass)
{
GObjectClass *object_class;
object_class = (GObjectClass *)klass;
object_class->constructor = gtk_combo_box_text_constructor;
}
static void
gtk_combo_box_text_buildable_interface_init (GtkBuildableIface *iface)
{
buildable_parent_iface = g_type_interface_peek_parent (iface);
iface->custom_tag_start = gtk_combo_box_text_buildable_custom_tag_start;
iface->custom_finished = gtk_combo_box_text_buildable_custom_finished;
}
typedef struct {
GtkBuilder *builder;
GObject *object;
const gchar *domain;
gchar *id;
GString *string;
gchar *context;
guint translatable : 1;
guint is_text : 1;
} ItemParserData;
static void
item_start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
gpointer user_data,
GError **error)
{
ItemParserData *data = (ItemParserData*)user_data;
guint i;
if (strcmp (element_name, "item") == 0)
{
data->is_text = TRUE;
for (i = 0; names[i]; i++)
{
if (strcmp (names[i], "translatable") == 0)
{
gboolean bval;
if (!_gtk_builder_boolean_from_string (values[i], &bval,
error))
return;
data->translatable = bval;
}
else if (strcmp (names[i], "comments") == 0)
{
/* do nothing, comments are for translators */
}
else if (strcmp (names[i], "context") == 0)
data->context = g_strdup (values[i]);
else if (strcmp (names[i], "id") == 0)
data->id = g_strdup (values[i]);
else
g_warning ("Unknown custom combo box item attribute: %s", names[i]);
}
}
}
static void
item_text (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
ItemParserData *data = (ItemParserData*)user_data;
if (data->is_text)
g_string_append_len (data->string, text, text_len);
}
static void
item_end_element (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
ItemParserData *data = (ItemParserData*)user_data;
/* Append the translated strings */
if (data->string->len)
{
if (data->translatable)
{
const gchar *translated;
translated = _gtk_builder_parser_translate (data->domain,
data->context,
data->string->str);
g_string_assign (data->string, translated);
}
gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (data->object), data->id, data->string->str);
}
data->translatable = FALSE;
g_string_set_size (data->string, 0);
g_free (data->context);
data->context = NULL;
g_free (data->id);
data->id = NULL;
data->is_text = FALSE;
}
static const GMarkupParser item_parser =
{
item_start_element,
item_end_element,
item_text
};
static gboolean
gtk_combo_box_text_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GMarkupParser *parser,
gpointer *data)
{
if (buildable_parent_iface->custom_tag_start (buildable, builder, child,
tagname, parser, data))
return TRUE;
if (strcmp (tagname, "items") == 0)
{
ItemParserData *parser_data;
parser_data = g_slice_new0 (ItemParserData);
parser_data->builder = g_object_ref (builder);
parser_data->object = g_object_ref (buildable);
parser_data->domain = gtk_builder_get_translation_domain (builder);
parser_data->string = g_string_new ("");
*parser = item_parser;
*data = parser_data;
return TRUE;
}
return FALSE;
}
static void
gtk_combo_box_text_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer user_data)
{
ItemParserData *data;
buildable_parent_iface->custom_finished (buildable, builder, child,
tagname, user_data);
if (strcmp (tagname, "items") == 0)
{
data = (ItemParserData*)user_data;
g_object_unref (data->object);
g_object_unref (data->builder);
g_string_free (data->string, TRUE);
g_slice_free (ItemParserData, data);
}
}
/**
* gtk_combo_box_text_new:
*
* Creates a new #GtkComboBoxText, which is a #GtkComboBox just displaying
* strings.
*
* Return value: A new #GtkComboBoxText
*
* Since: 2.24
*/
GtkWidget *
gtk_combo_box_text_new (void)
{
return g_object_new (GTK_TYPE_COMBO_BOX_TEXT,
NULL);
}
/**
* gtk_combo_box_text_new_with_entry:
*
* Creates a new #GtkComboBoxText, which is a #GtkComboBox just displaying
* strings. The combo box created by this function has an entry.
*
* Return value: a new #GtkComboBoxText
*
* Since: 2.24
*/
GtkWidget *
gtk_combo_box_text_new_with_entry (void)
{
return g_object_new (GTK_TYPE_COMBO_BOX_TEXT,
"has-entry", TRUE,
NULL);
}
/**
* gtk_combo_box_text_append_text:
* @combo_box: A #GtkComboBoxText
* @text: A string
*
* Appends @text to the list of strings stored in @combo_box.
*
* This is the same as calling gtk_combo_box_text_insert_text() with a
* position of -1.
*
* Since: 2.24
*/
void
gtk_combo_box_text_append_text (GtkComboBoxText *combo_box,
const gchar *text)
{
gtk_combo_box_text_insert (combo_box, -1, NULL, text);
}
/**
* gtk_combo_box_text_prepend_text:
* @combo_box: A #GtkComboBox
* @text: A string
*
* Prepends @text to the list of strings stored in @combo_box.
*
* This is the same as calling gtk_combo_box_text_insert_text() with a
* position of 0.
*
* Since: 2.24
*/
void
gtk_combo_box_text_prepend_text (GtkComboBoxText *combo_box,
const gchar *text)
{
gtk_combo_box_text_insert (combo_box, 0, NULL, text);
}
/**
* gtk_combo_box_text_insert_text:
* @combo_box: A #GtkComboBoxText
* @position: An index to insert @text
* @text: A string
*
* Inserts @text at @position in the list of strings stored in @combo_box.
*
* If @position is negative then @text is appended.
*
* This is the same as calling gtk_combo_box_text_insert() with a %NULL
* ID string.
*
* Since: 2.24
*/
void
gtk_combo_box_text_insert_text (GtkComboBoxText *combo_box,
gint position,
const gchar *text)
{
gtk_combo_box_text_insert (combo_box, position, NULL, text);
}
/**
* gtk_combo_box_text_append:
* @combo_box: A #GtkComboBoxText
* @id: (allow-none): a string ID for this value, or %NULL
* @text: A string
*
* Appends @text to the list of strings stored in @combo_box.
* If @id is non-%NULL then it is used as the ID of the row.
*
* This is the same as calling gtk_combo_box_text_insert() with a
* position of -1.
*
* Since: 2.24
*/
void
gtk_combo_box_text_append (GtkComboBoxText *combo_box,
const gchar *id,
const gchar *text)
{
gtk_combo_box_text_insert (combo_box, -1, id, text);
}
/**
* gtk_combo_box_text_prepend:
* @combo_box: A #GtkComboBox
* @id: (allow-none): a string ID for this value, or %NULL
* @text: a string
*
* Prepends @text to the list of strings stored in @combo_box.
* If @id is non-%NULL then it is used as the ID of the row.
*
* This is the same as calling gtk_combo_box_text_insert() with a
* position of 0.
*
* Since: 2.24
*/
void
gtk_combo_box_text_prepend (GtkComboBoxText *combo_box,
const gchar *id,
const gchar *text)
{
gtk_combo_box_text_insert (combo_box, 0, id, text);
}
/**
* gtk_combo_box_text_insert:
* @combo_box: A #GtkComboBoxText
* @position: An index to insert @text
* @id: (allow-none): a string ID for this value, or %NULL
* @text: A string to display
*
* Inserts @text at @position in the list of strings stored in @combo_box.
* If @id is non-%NULL then it is used as the ID of the row. See
* #GtkComboBox:id-column.
*
* If @position is negative then @text is appended.
*
* Since: 3.0
*/
void
gtk_combo_box_text_insert (GtkComboBoxText *combo_box,
gint position,
const gchar *id,
const gchar *text)
{
GtkListStore *store;
GtkTreeIter iter;
gint text_column;
gint column_type;
g_return_if_fail (GTK_IS_COMBO_BOX_TEXT (combo_box));
g_return_if_fail (text != NULL);
store = GTK_LIST_STORE (gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box)));
g_return_if_fail (GTK_IS_LIST_STORE (store));
text_column = gtk_combo_box_get_entry_text_column (GTK_COMBO_BOX (combo_box));
if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (combo_box)))
g_return_if_fail (text_column >= 0);
else if (text_column < 0)
text_column = 0;
column_type = gtk_tree_model_get_column_type (GTK_TREE_MODEL (store), text_column);
g_return_if_fail (column_type == G_TYPE_STRING);
if (position < 0)
gtk_list_store_append (store, &iter);
else
gtk_list_store_insert (store, &iter, position);
gtk_list_store_set (store, &iter, text_column, text, -1);
if (id != NULL)
{
gint id_column;
id_column = gtk_combo_box_get_id_column (GTK_COMBO_BOX (combo_box));
g_return_if_fail (id_column >= 0);
column_type = gtk_tree_model_get_column_type (GTK_TREE_MODEL (store), id_column);
g_return_if_fail (column_type == G_TYPE_STRING);
gtk_list_store_set (store, &iter, id_column, id, -1);
}
}
/**
* gtk_combo_box_text_remove:
* @combo_box: A #GtkComboBox
* @position: Index of the item to remove
*
* Removes the string at @position from @combo_box.
*
* Since: 2.24
*/
void
gtk_combo_box_text_remove (GtkComboBoxText *combo_box,
gint position)
{
GtkTreeModel *model;
GtkListStore *store;
GtkTreeIter iter;
g_return_if_fail (GTK_IS_COMBO_BOX_TEXT (combo_box));
g_return_if_fail (position >= 0);
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
store = GTK_LIST_STORE (model);
g_return_if_fail (GTK_IS_LIST_STORE (store));
if (gtk_tree_model_iter_nth_child (model, &iter, NULL, position))
gtk_list_store_remove (store, &iter);
}
/**
* gtk_combo_box_text_remove_all:
* @combo_box: A #GtkComboBoxText
*
* Removes all the text entries from the combo box.
*
* Since: 3.0
*/
void
gtk_combo_box_text_remove_all (GtkComboBoxText *combo_box)
{
GtkListStore *store;
g_return_if_fail (GTK_IS_COMBO_BOX_TEXT (combo_box));
store = GTK_LIST_STORE (gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box)));
gtk_list_store_clear (store);
}
/**
* gtk_combo_box_text_get_active_text:
* @combo_box: A #GtkComboBoxText
*
* Returns the currently active string in @combo_box, or %NULL
* if none is selected. If @combo_box contains an entry, this
* function will return its contents (which will not necessarily
* be an item from the list).
*
* Returns: (transfer full): a newly allocated string containing the
* currently active text. Must be freed with g_free().
*
* Since: 2.24
*/
gchar *
gtk_combo_box_text_get_active_text (GtkComboBoxText *combo_box)
{
GtkTreeIter iter;
gchar *text = NULL;
g_return_val_if_fail (GTK_IS_COMBO_BOX_TEXT (combo_box), NULL);
if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (combo_box)))
{
GtkWidget *entry;
entry = gtk_bin_get_child (GTK_BIN (combo_box));
text = g_strdup (gtk_entry_get_text (GTK_ENTRY (entry)));
}
else if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo_box), &iter))
{
GtkTreeModel *model;
gint text_column;
gint column_type;
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
g_return_val_if_fail (GTK_IS_LIST_STORE (model), NULL);
text_column = gtk_combo_box_get_entry_text_column (GTK_COMBO_BOX (combo_box));
g_return_val_if_fail (text_column >= 0, NULL);
column_type = gtk_tree_model_get_column_type (model, text_column);
g_return_val_if_fail (column_type == G_TYPE_STRING, NULL);
gtk_tree_model_get (model, &iter, text_column, &text, -1);
}
return text;
}
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