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gtk/gtk/gtkdropdown.c
Matthias Clasen 1068808742 dropdown: Fix to work with recent listview changes 
Introduce our own 'inertness' for the list item widget
that shows the selected value inside the button.
2023-04-02 12:36:03 -04:00

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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,
* and adds a checkmark to the selected item in the popup.
*
* To set your own factory, use [method@Gtk.DropDown.set_factory]. It is
* possible to use a separate factory for the items in the popup, with
* [method@Gtk.DropDown.set_list_factory].
*
* `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>
* ```
*
* To learn more about the list widget framework, see the
* [overview](section-list-widget.html).
*
* # 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_base_get_position (GTK_LIST_ITEM_BASE (self->button_item)))
{
gtk_list_item_base_update (GTK_LIST_ITEM_BASE (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_base_get_item (GTK_LIST_ITEM_BASE (self->button_item)))
{
gtk_list_item_base_update (GTK_LIST_ITEM_BASE (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_root (GtkWidget *widget)
{
GtkDropDown *self = GTK_DROP_DOWN (widget);
GTK_WIDGET_CLASS (gtk_drop_down_parent_class)->root (widget);
if (self->factory)
gtk_list_factory_widget_set_factory (GTK_LIST_FACTORY_WIDGET (self->button_item), self->factory);
}
static void
gtk_drop_down_unroot (GtkWidget *widget)
{
GtkDropDown *self = GTK_DROP_DOWN (widget);
if (self->factory)
gtk_list_factory_widget_set_factory (GTK_LIST_FACTORY_WIDGET (self->button_item), NULL);
GTK_WIDGET_CLASS (gtk_drop_down_parent_class)->unroot (widget);
}
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;
widget_class->root = gtk_drop_down_root;
widget_class->unroot = gtk_drop_down_unroot;
/**
* 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_set_visible (icon, TRUE);
g_signal_connect (self, "notify::selected-item",
G_CALLBACK (selected_item_changed), list_item);
selected_item_changed (self, NULL, list_item);
}
else
{
gtk_widget_set_visible (icon, FALSE);
}
}
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;
if (gtk_widget_get_root (GTK_WIDGET (self)))
gtk_list_factory_widget_set_factory (GTK_LIST_FACTORY_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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