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gtk2/gtk/gtkdropdown.c
Benjamin Otte f30e59fed9 dropdown: Handle ::selected and ::selected-item separately 
GtkSingleSelection will only emit either of those signals if they
change. But it is possible that only one of those properties changes,
and in those cases we want to only notify for that property changing in
the dropdown, too.
2022-10-17 20:11:27 +02:00

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/*
* Copyright © 2019 Red Hat, Inc.
*
* 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 2.1 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/>.
*
* Authors: Matthias Clasen <mclasen@redhat.com>
*/
#include "config.h"
#include "gtkdropdown.h"
#include "gtkbuiltiniconprivate.h"
#include "gtklistview.h"
#include "gtklistitemfactory.h"
#include "gtksignallistitemfactory.h"
#include "gtklistitemwidgetprivate.h"
#include "gtkpopover.h"
#include "gtkprivate.h"
#include "gtksingleselection.h"
#include "gtkfilterlistmodel.h"
#include "gtkstringfilter.h"
#include "gtkmultifilter.h"
#include "gtkwidgetprivate.h"
#include "gtknative.h"
#include "gtktogglebutton.h"
#include "gtkexpression.h"
#include "gtkstack.h"
#include "gtksearchentry.h"
#include "gtklabel.h"
#include "gtklistitem.h"
#include "gtkbuildable.h"
#include "gtkbuilderprivate.h"
#include "gtkstringlist.h"
#include "gtkbox.h"
/**
* GtkDropDown:
*
* `GtkDropDown` is a widget that allows the user to choose an item
* from a list of options.
*
* ![An example GtkDropDown](drop-down.png)
*
* The `GtkDropDown` displays the selected choice.
*
* The options are given to `GtkDropDown` in the form of `GListModel`
* and how the individual options are represented is determined by
* a [class@Gtk.ListItemFactory]. The default factory displays simple strings.
*
* `GtkDropDown` knows how to obtain strings from the items in a
* [class@Gtk.StringList]; for other models, you have to provide an expression
* to find the strings via [method@Gtk.DropDown.set_expression].
*
* `GtkDropDown` can optionally allow search in the popup, which is
* useful if the list of options is long. To enable the search entry,
* use [method@Gtk.DropDown.set_enable_search].
*
* Here is a UI definition example for `GtkDropDown` with a simple model:
* ```xml
* <object class="GtkDropDown">
* <property name="model">
* <object class="GtkStringList">
* <items>
* <item translatable="yes">Factory</item>
* <item translatable="yes">Home</item>
* <item translatable="yes">Subway</item>
* </items>
* </object>
* </property>
* </object>
* ```
*
* # CSS nodes
*
* `GtkDropDown` has a single CSS node with name dropdown,
* with the button and popover nodes as children.
*
* # Accessibility
*
* `GtkDropDown` uses the %GTK_ACCESSIBLE_ROLE_COMBO_BOX role.
*/
struct _GtkDropDown
{
GtkWidget parent_instance;
GtkListItemFactory *factory;
GtkListItemFactory *list_factory;
GListModel *model;
GtkSelectionModel *selection;
GListModel *filter_model;
GtkSelectionModel *popup_selection;
GtkWidget *popup;
GtkWidget *button;
GtkWidget *arrow;
GtkWidget *popup_list;
GtkWidget *button_stack;
GtkWidget *button_item;
GtkWidget *button_placeholder;
GtkWidget *search_box;
GtkWidget *search_entry;
GtkExpression *expression;
guint enable_search : 1;
guint show_arrow : 1;
};
struct _GtkDropDownClass
{
GtkWidgetClass parent_class;
};
enum
{
PROP_0,
PROP_FACTORY,
PROP_LIST_FACTORY,
PROP_MODEL,
PROP_SELECTED,
PROP_SELECTED_ITEM,
PROP_ENABLE_SEARCH,
PROP_EXPRESSION,
PROP_SHOW_ARROW,
N_PROPS
};
enum
{
ACTIVATE,
LAST_SIGNAL
};
G_DEFINE_TYPE (GtkDropDown, gtk_drop_down, GTK_TYPE_WIDGET)
static GParamSpec *properties[N_PROPS] = { NULL, };
static guint signals[LAST_SIGNAL] = { 0 };
static void
button_toggled (GtkWidget *widget,
gpointer data)
{
GtkDropDown *self = data;
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
gtk_popover_popup (GTK_POPOVER (self->popup));
else
gtk_popover_popdown (GTK_POPOVER (self->popup));
}
static void
popover_closed (GtkPopover *popover,
gpointer data)
{
GtkDropDown *self = data;
gtk_editable_set_text (GTK_EDITABLE (self->search_entry), "");
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (self->button), FALSE);
}
static void
row_activated (GtkListView *listview,
guint position,
gpointer data)
{
GtkDropDown *self = data;
GtkFilter *filter;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (self->button), FALSE);
gtk_popover_popdown (GTK_POPOVER (self->popup));
/* reset the filter so positions are 1-1 */
filter = gtk_filter_list_model_get_filter (GTK_FILTER_LIST_MODEL (self->filter_model));
if (GTK_IS_STRING_FILTER (filter))
gtk_string_filter_set_search (GTK_STRING_FILTER (filter), "");
gtk_drop_down_set_selected (self, gtk_single_selection_get_selected (GTK_SINGLE_SELECTION (self->popup_selection)));
}
static void
selection_changed (GtkSingleSelection *selection,
GParamSpec *pspec,
gpointer data)
{
GtkDropDown *self = data;
guint selected;
GtkFilter *filter;
selected = gtk_single_selection_get_selected (GTK_SINGLE_SELECTION (self->selection));
if (selected == GTK_INVALID_LIST_POSITION)
{
gtk_stack_set_visible_child_name (GTK_STACK (self->button_stack), "empty");
}
else
{
gtk_stack_set_visible_child_name (GTK_STACK (self->button_stack), "item");
}
if (selected != gtk_list_item_widget_get_position (GTK_LIST_ITEM_WIDGET (self->button_item)))
{
gtk_list_item_widget_update (GTK_LIST_ITEM_WIDGET (self->button_item),
selected,
gtk_single_selection_get_selected_item (GTK_SINGLE_SELECTION (self->selection)),
FALSE);
}
/* reset the filter so positions are 1-1 */
filter = gtk_filter_list_model_get_filter (GTK_FILTER_LIST_MODEL (self->filter_model));
if (GTK_IS_STRING_FILTER (filter))
gtk_string_filter_set_search (GTK_STRING_FILTER (filter), "");
gtk_single_selection_set_selected (GTK_SINGLE_SELECTION (self->popup_selection), selected);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED]);
}
static void
selection_item_changed (GtkSingleSelection *selection,
GParamSpec *pspec,
gpointer data)
{
GtkDropDown *self = data;
gpointer item;
item = gtk_single_selection_get_selected_item (GTK_SINGLE_SELECTION (self->selection));
if (item != gtk_list_item_widget_get_item (GTK_LIST_ITEM_WIDGET (self->button_item)))
{
gtk_list_item_widget_update (GTK_LIST_ITEM_WIDGET (self->button_item),
gtk_single_selection_get_selected (GTK_SINGLE_SELECTION (self->selection)),
item,
FALSE);
}
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED_ITEM]);
}
static void
gtk_drop_down_activate (GtkDropDown *self)
{
gtk_widget_activate (self->button);
}
static void
update_filter (GtkDropDown *self)
{
if (self->filter_model)
{
GtkFilter *filter;
if (self->expression)
{
filter = GTK_FILTER (gtk_string_filter_new (gtk_expression_ref (self->expression)));
gtk_string_filter_set_match_mode (GTK_STRING_FILTER (filter), GTK_STRING_FILTER_MATCH_MODE_PREFIX);
}
else
filter = GTK_FILTER (gtk_every_filter_new ());
gtk_filter_list_model_set_filter (GTK_FILTER_LIST_MODEL (self->filter_model), filter);
g_object_unref (filter);
}
}
static void
search_changed (GtkSearchEntry *entry, gpointer data)
{
GtkDropDown *self = data;
const char *text;
GtkFilter *filter;
text = gtk_editable_get_text (GTK_EDITABLE (entry));
filter = gtk_filter_list_model_get_filter (GTK_FILTER_LIST_MODEL (self->filter_model));
if (GTK_IS_STRING_FILTER (filter))
gtk_string_filter_set_search (GTK_STRING_FILTER (filter), text);
}
static void
search_stop (GtkSearchEntry *entry, gpointer data)
{
GtkDropDown *self = data;
GtkFilter *filter;
filter = gtk_filter_list_model_get_filter (GTK_FILTER_LIST_MODEL (self->filter_model));
if (GTK_IS_STRING_FILTER (filter))
{
if (gtk_string_filter_get_search (GTK_STRING_FILTER (filter)))
gtk_string_filter_set_search (GTK_STRING_FILTER (filter), NULL);
else
gtk_popover_popdown (GTK_POPOVER (self->popup));
}
}
static void
gtk_drop_down_dispose (GObject *object)
{
GtkDropDown *self = GTK_DROP_DOWN (object);
g_clear_pointer (&self->popup, gtk_widget_unparent);
g_clear_pointer (&self->button, gtk_widget_unparent);
g_clear_object (&self->model);
if (self->selection)
{
g_signal_handlers_disconnect_by_func (self->selection, selection_changed, self);
g_signal_handlers_disconnect_by_func (self->selection, selection_item_changed, self);
}
g_clear_object (&self->filter_model);
g_clear_pointer (&self->expression, gtk_expression_unref);
g_clear_object (&self->selection);
g_clear_object (&self->popup_selection);
g_clear_object (&self->factory);
g_clear_object (&self->list_factory);
G_OBJECT_CLASS (gtk_drop_down_parent_class)->dispose (object);
}
static void
gtk_drop_down_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkDropDown *self = GTK_DROP_DOWN (object);
switch (property_id)
{
case PROP_FACTORY:
g_value_set_object (value, self->factory);
break;
case PROP_LIST_FACTORY:
g_value_set_object (value, self->list_factory);
break;
case PROP_MODEL:
g_value_set_object (value, self->model);
break;
case PROP_SELECTED:
g_value_set_uint (value, gtk_drop_down_get_selected (self));
break;
case PROP_SELECTED_ITEM:
g_value_set_object (value, gtk_drop_down_get_selected_item (self));
break;
case PROP_ENABLE_SEARCH:
g_value_set_boolean (value, self->enable_search);
break;
case PROP_EXPRESSION:
gtk_value_set_expression (value, self->expression);
break;
case PROP_SHOW_ARROW:
g_value_set_boolean (value, gtk_drop_down_get_show_arrow (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_drop_down_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkDropDown *self = GTK_DROP_DOWN (object);
switch (property_id)
{
case PROP_FACTORY:
gtk_drop_down_set_factory (self, g_value_get_object (value));
break;
case PROP_LIST_FACTORY:
gtk_drop_down_set_list_factory (self, g_value_get_object (value));
break;
case PROP_MODEL:
gtk_drop_down_set_model (self, g_value_get_object (value));
break;
case PROP_SELECTED:
gtk_drop_down_set_selected (self, g_value_get_uint (value));
break;
case PROP_ENABLE_SEARCH:
gtk_drop_down_set_enable_search (self, g_value_get_boolean (value));
break;
case PROP_EXPRESSION:
gtk_drop_down_set_expression (self, gtk_value_get_expression (value));
break;
case PROP_SHOW_ARROW:
gtk_drop_down_set_show_arrow (self, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_drop_down_measure (GtkWidget *widget,
GtkOrientation orientation,
int size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkDropDown *self = GTK_DROP_DOWN (widget);
gtk_widget_measure (self->button,
orientation,
size,
minimum, natural,
minimum_baseline, natural_baseline);
}
static void
gtk_drop_down_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
GtkDropDown *self = GTK_DROP_DOWN (widget);
gtk_widget_size_allocate (self->button, &(GtkAllocation) { 0, 0, width, height }, baseline);
gtk_widget_set_size_request (self->popup, width, -1);
gtk_widget_queue_resize (self->popup);
gtk_popover_present (GTK_POPOVER (self->popup));
}
static gboolean
gtk_drop_down_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkDropDown *self = GTK_DROP_DOWN (widget);
if (self->popup && gtk_widget_get_visible (self->popup))
return gtk_widget_child_focus (self->popup, direction);
else
return gtk_widget_child_focus (self->button, direction);
}
static gboolean
gtk_drop_down_grab_focus (GtkWidget *widget)
{
GtkDropDown *self = GTK_DROP_DOWN (widget);
return gtk_widget_grab_focus (self->button);
}
static void
gtk_drop_down_class_init (GtkDropDownClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose = gtk_drop_down_dispose;
gobject_class->get_property = gtk_drop_down_get_property;
gobject_class->set_property = gtk_drop_down_set_property;
widget_class->measure = gtk_drop_down_measure;
widget_class->size_allocate = gtk_drop_down_size_allocate;
widget_class->focus = gtk_drop_down_focus;
widget_class->grab_focus = gtk_drop_down_grab_focus;
/**
* GtkDropDown:factory: (attributes org.gtk.Property.get=gtk_drop_down_get_factory org.gtk.Property.set=gtk_drop_down_set_factory)
*
* Factory for populating list items.
*/
properties[PROP_FACTORY] =
g_param_spec_object ("factory", NULL, NULL,
GTK_TYPE_LIST_ITEM_FACTORY,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkDropDown:list-factory: (attributes org.gtk.Property.get=gtk_drop_down_get_list_factory org.gtk.Property.set=gtk_drop_down_set_list_factory)
*
* The factory for populating list items in the popup.
*
* If this is not set, [property@Gtk.DropDown:factory] is used.
*/
properties[PROP_LIST_FACTORY] =
g_param_spec_object ("list-factory", NULL, NULL,
GTK_TYPE_LIST_ITEM_FACTORY,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkDropDown:model: (attributes org.gtk.Property.get=gtk_drop_down_get_model org.gtk.Property.set=gtk_drop_down_set_model)
*
* Model for the displayed items.
*/
properties[PROP_MODEL] =
g_param_spec_object ("model", NULL, NULL,
G_TYPE_LIST_MODEL,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkDropDown:selected: (attributes org.gtk.Property.get=gtk_drop_down_get_selected org.gtk.Property.set=gtk_drop_down_set_selected)
*
* The position of the selected item.
*
* If no item is selected, the property has the value
* %GTK_INVALID_LIST_POSITION.
*/
properties[PROP_SELECTED] =
g_param_spec_uint ("selected", NULL, NULL,
0, G_MAXUINT, GTK_INVALID_LIST_POSITION,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkDropDown:selected-item: (attributes org.gtk.Property.get=gtk_drop_down_get_selected_item)
*
* The selected item.
*/
properties[PROP_SELECTED_ITEM] =
g_param_spec_object ("selected-item", NULL, NULL,
G_TYPE_OBJECT,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GtkDropDown:enable-search: (attributes org.gtk.Property.get=gtk_drop_down_get_enable_search org.gtk.Property.set=gtk_drop_down_set_enable_search)
*
* Whether to show a search entry in the popup.
*
* Note that search requires [property@Gtk.DropDown:expression]
* to be set.
*/
properties[PROP_ENABLE_SEARCH] =
g_param_spec_boolean ("enable-search", NULL, NULL,
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkDropDown:expression: (type GtkExpression) (attributes org.gtk.Property.get=gtk_drop_down_get_expression org.gtk.Property.set=gtk_drop_down_set_expression)
*
* An expression to evaluate to obtain strings to match against the search
* term.
*
* See [property@Gtk.DropDown:enable-search] for how to enable search.
* If [property@Gtk.DropDown:factory] is not set, the expression is also
* used to bind strings to labels produced by a default factory.
*/
properties[PROP_EXPRESSION] =
gtk_param_spec_expression ("expression", NULL, NULL,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkDropDown:show-arrow: (attributes org.gtk.Property.get=gtk_drop_down_get_show_arrow org.gtk.Property.set=gtk_drop_down_set_show_arrow)
*
* Whether to show an arrow within the GtkDropDown widget.
*
* Since: 4.6
*/
properties[PROP_SHOW_ARROW] =
g_param_spec_boolean ("show-arrow", NULL, NULL,
TRUE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class, N_PROPS, properties);
/**
* GtkDropDown::activate:
* @widget: the object which received the signal.
*
* Emitted to when the drop down is activated.
*
* The `::activate` signal on `GtkDropDown` is an action signal and
* emitting it causes the drop down to pop up its dropdown.
*
* Since: 4.6
*/
signals[ACTIVATE] =
g_signal_new_class_handler (I_ ("activate"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_drop_down_activate),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
gtk_widget_class_set_activate_signal (widget_class, signals[ACTIVATE]);
gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/ui/gtkdropdown.ui");
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, arrow);
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, button);
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, button_stack);
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, button_item);
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, popup);
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, popup_list);
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, search_box);
gtk_widget_class_bind_template_child (widget_class, GtkDropDown, search_entry);
gtk_widget_class_bind_template_callback (widget_class, row_activated);
gtk_widget_class_bind_template_callback (widget_class, button_toggled);
gtk_widget_class_bind_template_callback (widget_class, popover_closed);
gtk_widget_class_bind_template_callback (widget_class, search_changed);
gtk_widget_class_bind_template_callback (widget_class, search_stop);
gtk_widget_class_set_css_name (widget_class, I_("dropdown"));
gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_COMBO_BOX);
}
static void
setup_item (GtkSignalListItemFactory *factory,
GtkListItem *list_item,
gpointer data)
{
GtkWidget *box;
GtkWidget *label;
GtkWidget *icon;
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
label = gtk_label_new (NULL);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_box_append (GTK_BOX (box), label);
icon = gtk_image_new_from_icon_name ("object-select-symbolic");
gtk_box_append (GTK_BOX (box), icon);
gtk_list_item_set_child (list_item, box);
}
static void
selected_item_changed (GtkDropDown *self,
GParamSpec *pspec,
GtkListItem *list_item)
{
GtkWidget *box;
GtkWidget *icon;
box = gtk_list_item_get_child (list_item);
icon = gtk_widget_get_last_child (box);
if (gtk_drop_down_get_selected_item (self) == gtk_list_item_get_item (list_item))
gtk_widget_set_opacity (icon, 1.0);
else
gtk_widget_set_opacity (icon, 0.0);
}
static void
bind_item (GtkSignalListItemFactory *factory,
GtkListItem *list_item,
gpointer data)
{
GtkDropDown *self = data;
gpointer item;
GtkWidget *box;
GtkWidget *label;
GtkWidget *icon;
GValue value = G_VALUE_INIT;
item = gtk_list_item_get_item (list_item);
box = gtk_list_item_get_child (list_item);
label = gtk_widget_get_first_child (box);
icon = gtk_widget_get_last_child (box);
if (self->expression &&
gtk_expression_evaluate (self->expression, item, &value))
{
gtk_label_set_label (GTK_LABEL (label), g_value_get_string (&value));
g_value_unset (&value);
}
else if (GTK_IS_STRING_OBJECT (item))
{
const char *string;
string = gtk_string_object_get_string (GTK_STRING_OBJECT (item));
gtk_label_set_label (GTK_LABEL (label), string);
}
else
{
g_critical ("Either GtkDropDown:factory or GtkDropDown:expression must be set");
}
if (gtk_widget_get_ancestor (box, GTK_TYPE_POPOVER) == self->popup)
{
gtk_widget_show (icon);
g_signal_connect (self, "notify::selected-item",
G_CALLBACK (selected_item_changed), list_item);
selected_item_changed (self, NULL, list_item);
}
else
{
gtk_widget_hide (icon);
}
}
static void
unbind_item (GtkSignalListItemFactory *factory,
GtkListItem *list_item,
gpointer data)
{
GtkDropDown *self = data;
g_signal_handlers_disconnect_by_func (self, selected_item_changed, list_item);
}
static void
set_default_factory (GtkDropDown *self)
{
GtkListItemFactory *factory;
factory = gtk_signal_list_item_factory_new ();
g_signal_connect (factory, "setup", G_CALLBACK (setup_item), self);
g_signal_connect (factory, "bind", G_CALLBACK (bind_item), self);
g_signal_connect (factory, "unbind", G_CALLBACK (unbind_item), self);
gtk_drop_down_set_factory (self, factory);
g_object_unref (factory);
}
static void
gtk_drop_down_init (GtkDropDown *self)
{
g_type_ensure (GTK_TYPE_BUILTIN_ICON);
g_type_ensure (GTK_TYPE_LIST_ITEM_WIDGET);
gtk_widget_init_template (GTK_WIDGET (self));
self->show_arrow = gtk_widget_get_visible (self->arrow);
set_default_factory (self);
}
/**
* gtk_drop_down_new:
* @model: (transfer full) (nullable): the model to use
* @expression: (transfer full) (nullable): the expression to use
*
* Creates a new `GtkDropDown`.
*
* You may want to call [method@Gtk.DropDown.set_factory]
* to set up a way to map its items to widgets.
*
* Returns: a new `GtkDropDown`
*/
GtkWidget *
gtk_drop_down_new (GListModel *model,
GtkExpression *expression)
{
GtkWidget *self;
self = g_object_new (GTK_TYPE_DROP_DOWN,
"model", model,
"expression", expression,
NULL);
/* we're consuming the references */
g_clear_object (&model);
g_clear_pointer (&expression, gtk_expression_unref);
return self;
}
/**
* gtk_drop_down_new_from_strings:
* @strings: (array zero-terminated=1): The strings to put in the dropdown
*
* Creates a new `GtkDropDown` that is populated with
* the strings.
*
* Returns: a new `GtkDropDown`
*/
GtkWidget *
gtk_drop_down_new_from_strings (const char * const *strings)
{
return gtk_drop_down_new (G_LIST_MODEL (gtk_string_list_new (strings)), NULL);
}
/**
* gtk_drop_down_get_model: (attributes org.gtk.Method.get_property=model)
* @self: a `GtkDropDown`
*
* Gets the model that provides the displayed items.
*
* Returns: (nullable) (transfer none): The model in use
*/
GListModel *
gtk_drop_down_get_model (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), NULL);
return self->model;
}
/**
* gtk_drop_down_set_model: (attributes org.gtk.Method.set_property=model)
* @self: a `GtkDropDown`
* @model: (nullable) (transfer none): the model to use
*
* Sets the `GListModel` to use.
*/
void
gtk_drop_down_set_model (GtkDropDown *self,
GListModel *model)
{
g_return_if_fail (GTK_IS_DROP_DOWN (self));
g_return_if_fail (model == NULL || G_IS_LIST_MODEL (model));
if (!g_set_object (&self->model, model))
return;
if (model == NULL)
{
gtk_list_view_set_model (GTK_LIST_VIEW (self->popup_list), NULL);
if (self->selection)
{
g_signal_handlers_disconnect_by_func (self->selection, selection_changed, self);
g_signal_handlers_disconnect_by_func (self->selection, selection_item_changed, self);
}
g_clear_object (&self->selection);
g_clear_object (&self->filter_model);
g_clear_object (&self->popup_selection);
}
else
{
GListModel *filter_model;
GtkSelectionModel *selection;
filter_model = G_LIST_MODEL (gtk_filter_list_model_new (g_object_ref (model), NULL));
g_set_object (&self->filter_model, filter_model);
update_filter (self);
selection = GTK_SELECTION_MODEL (gtk_single_selection_new (filter_model));
g_set_object (&self->popup_selection, selection);
gtk_list_view_set_model (GTK_LIST_VIEW (self->popup_list), selection);
g_object_unref (selection);
selection = GTK_SELECTION_MODEL (gtk_single_selection_new (g_object_ref (model)));
g_set_object (&self->selection, selection);
g_object_unref (selection);
g_signal_connect (self->selection, "notify::selected", G_CALLBACK (selection_changed), self);
g_signal_connect (self->selection, "notify::selected-item", G_CALLBACK (selection_item_changed), self);
selection_changed (GTK_SINGLE_SELECTION (self->selection), NULL, self);
selection_item_changed (GTK_SINGLE_SELECTION (self->selection), NULL, self);
}
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MODEL]);
}
/**
* gtk_drop_down_get_factory: (attributes org.gtk.Method.get_property=factory)
* @self: a `GtkDropDown`
*
* Gets the factory that's currently used to populate list items.
*
* The factory returned by this function is always used for the
* item in the button. It is also used for items in the popup
* if [property@Gtk.DropDown:list-factory] is not set.
*
* Returns: (nullable) (transfer none): The factory in use
*/
GtkListItemFactory *
gtk_drop_down_get_factory (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), NULL);
return self->factory;
}
/**
* gtk_drop_down_set_factory: (attributes org.gtk.Method.set_property=factory)
* @self: a `GtkDropDown`
* @factory: (nullable) (transfer none): the factory to use
*
* Sets the `GtkListItemFactory` to use for populating list items.
*/
void
gtk_drop_down_set_factory (GtkDropDown *self,
GtkListItemFactory *factory)
{
g_return_if_fail (GTK_IS_DROP_DOWN (self));
g_return_if_fail (factory == NULL || GTK_LIST_ITEM_FACTORY (factory));
if (!g_set_object (&self->factory, factory))
return;
gtk_list_item_widget_set_factory (GTK_LIST_ITEM_WIDGET (self->button_item), factory);
if (self->list_factory == NULL)
gtk_list_view_set_factory (GTK_LIST_VIEW (self->popup_list), factory);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_FACTORY]);
}
/**
* gtk_drop_down_get_list_factory: (attributes org.gtk.Method.get_property=list-factory)
* @self: a `GtkDropDown`
*
* Gets the factory that's currently used to populate list items in the popup.
*
* Returns: (nullable) (transfer none): The factory in use
*/
GtkListItemFactory *
gtk_drop_down_get_list_factory (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), NULL);
return self->list_factory;
}
/**
* gtk_drop_down_set_list_factory: (attributes org.gtk.Method.set_property=list-factory)
* @self: a `GtkDropDown`
* @factory: (nullable) (transfer none): the factory to use
*
* Sets the `GtkListItemFactory` to use for populating list items in the popup.
*/
void
gtk_drop_down_set_list_factory (GtkDropDown *self,
GtkListItemFactory *factory)
{
g_return_if_fail (GTK_IS_DROP_DOWN (self));
g_return_if_fail (factory == NULL || GTK_LIST_ITEM_FACTORY (factory));
if (!g_set_object (&self->list_factory, factory))
return;
if (self->list_factory != NULL)
gtk_list_view_set_factory (GTK_LIST_VIEW (self->popup_list), self->list_factory);
else
gtk_list_view_set_factory (GTK_LIST_VIEW (self->popup_list), self->factory);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_LIST_FACTORY]);
}
/**
* gtk_drop_down_set_selected: (attributes org.gtk.Method.set_property=selected)
* @self: a `GtkDropDown`
* @position: the position of the item to select, or %GTK_INVALID_LIST_POSITION
*
* Selects the item at the given position.
*/
void
gtk_drop_down_set_selected (GtkDropDown *self,
guint position)
{
g_return_if_fail (GTK_IS_DROP_DOWN (self));
if (self->selection == NULL)
return;
if (gtk_single_selection_get_selected (GTK_SINGLE_SELECTION (self->selection)) == position)
return;
gtk_single_selection_set_selected (GTK_SINGLE_SELECTION (self->selection), position);
}
/**
* gtk_drop_down_get_selected: (attributes org.gtk.Method.get_property=selected)
* @self: a `GtkDropDown`
*
* Gets the position of the selected item.
*
* Returns: the position of the selected item, or %GTK_INVALID_LIST_POSITION
* if not item is selected
*/
guint
gtk_drop_down_get_selected (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), GTK_INVALID_LIST_POSITION);
if (self->selection == NULL)
return GTK_INVALID_LIST_POSITION;
return gtk_single_selection_get_selected (GTK_SINGLE_SELECTION (self->selection));
}
/**
* gtk_drop_down_get_selected_item: (attributes org.gtk.Method.get_property=selected-item)
* @self: a `GtkDropDown`
*
* Gets the selected item. If no item is selected, %NULL is returned.
*
* Returns: (transfer none) (type GObject) (nullable): The selected item
*/
gpointer
gtk_drop_down_get_selected_item (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), NULL);
if (self->selection == NULL)
return NULL;
return gtk_single_selection_get_selected_item (GTK_SINGLE_SELECTION (self->selection));
}
/**
* gtk_drop_down_set_enable_search: (attributes org.gtk.Method.set_property=enable-search)
* @self: a `GtkDropDown`
* @enable_search: whether to enable search
*
* Sets whether a search entry will be shown in the popup that
* allows to search for items in the list.
*
* Note that [property@Gtk.DropDown:expression] must be set for
* search to work.
*/
void
gtk_drop_down_set_enable_search (GtkDropDown *self,
gboolean enable_search)
{
g_return_if_fail (GTK_IS_DROP_DOWN (self));
enable_search = !!enable_search;
if (self->enable_search == enable_search)
return;
self->enable_search = enable_search;
gtk_editable_set_text (GTK_EDITABLE (self->search_entry), "");
gtk_widget_set_visible (self->search_box, enable_search);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_ENABLE_SEARCH]);
}
/**
* gtk_drop_down_get_enable_search: (attributes org.gtk.Method.set_property=enable-search)
* @self: a `GtkDropDown`
*
* Returns whether search is enabled.
*
* Returns: %TRUE if the popup includes a search entry
*/
gboolean
gtk_drop_down_get_enable_search (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), FALSE);
return self->enable_search;
}
/**
* gtk_drop_down_set_expression: (attributes org.gtk.Method.set_property=expression)
* @self: a `GtkDropDown`
* @expression: (nullable): a `GtkExpression`
*
* Sets the expression that gets evaluated to obtain strings from items.
*
* This is used for search in the popup. The expression must have
* a value type of %G_TYPE_STRING.
*/
void
gtk_drop_down_set_expression (GtkDropDown *self,
GtkExpression *expression)
{
g_return_if_fail (GTK_IS_DROP_DOWN (self));
g_return_if_fail (expression == NULL ||
gtk_expression_get_value_type (expression) == G_TYPE_STRING);
if (self->expression == expression)
return;
if (self->expression)
gtk_expression_unref (self->expression);
self->expression = expression;
if (self->expression)
gtk_expression_ref (self->expression);
update_filter (self);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_EXPRESSION]);
}
/**
* gtk_drop_down_get_expression: (attributes org.gtk.Method.get_property=expression)
* @self: a `GtkDropDown`
*
* Gets the expression set that is used to obtain strings from items.
*
* See [method@Gtk.DropDown.set_expression].
*
* Returns: (nullable) (transfer none): a `GtkExpression`
*/
GtkExpression *
gtk_drop_down_get_expression (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), NULL);
return self->expression;
}
/**
* gtk_drop_down_set_show_arrow: (attributes org.gtk.Method.set_property=show-arrow)
* @self: a `GtkDropDown`
* @show_arrow: whether to show an arrow within the widget
*
* Sets whether an arrow will be displayed within the widget.
*
* Since: 4.6
*/
void
gtk_drop_down_set_show_arrow (GtkDropDown *self,
gboolean show_arrow)
{
g_return_if_fail (GTK_IS_DROP_DOWN (self));
show_arrow = !!show_arrow;
if (self->show_arrow == show_arrow)
return;
self->show_arrow = show_arrow;
gtk_widget_set_visible (self->arrow, show_arrow);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SHOW_ARROW]);
}
/**
* gtk_drop_down_get_show_arrow: (attributes org.gtk.Method.set_property=show-arrow)
* @self: a `GtkDropDown`
*
* Returns whether to show an arrow within the widget.
*
* Returns: %TRUE if an arrow will be shown.
*
* Since: 4.6
*/
gboolean
gtk_drop_down_get_show_arrow (GtkDropDown *self)
{
g_return_val_if_fail (GTK_IS_DROP_DOWN (self), FALSE);
return self->show_arrow;
}
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