forked from AuroraMiddleware/gtk
163 lines
4.4 KiB
C
163 lines
4.4 KiB
C
/*
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* Copyright © 2018 Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkrootprivate.h"
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#include "gtknative.h"
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#include "gtkcssnodeprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gdk/gdk-private.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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/**
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* SECTION:gtkroot
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* @Title: GtkRoot
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* @Short_description: Interface for root widgets
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* @See_also: #GtkWindow
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*
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* #GtkRoot is the interface implemented by all widgets that can act as a toplevel
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* widget to a hierarchy of widgets. The root widget takes care of providing the
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* connection to the windowing system and manages layout, drawing and event delivery
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* for its widget hierarchy.
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*
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* The obvious example of a #GtkRoot is #GtkWindow.
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*/
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G_DEFINE_INTERFACE_WITH_CODE (GtkRoot, gtk_root, GTK_TYPE_WIDGET,
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g_type_interface_add_prerequisite (g_define_type_id, GTK_TYPE_NATIVE))
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static GdkDisplay *
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gtk_root_default_get_display (GtkRoot *self)
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{
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return gdk_display_get_default ();
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}
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static GtkConstraintSolver *
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gtk_root_default_get_constraint_solver (GtkRoot *self)
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{
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return NULL;
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}
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static void
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gtk_root_default_init (GtkRootInterface *iface)
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{
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iface->get_display = gtk_root_default_get_display;
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iface->get_constraint_solver = gtk_root_default_get_constraint_solver;
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g_object_interface_install_property (iface,
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g_param_spec_object ("focus-widget",
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P_("Focus widget"),
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P_("The focus widget"),
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GTK_TYPE_WIDGET,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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}
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/**
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* gtk_root_get_display:
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* @self: a #GtkRoot
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*
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* Returns the display that this GtkRoot is on.
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*
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* Returns: (transfer none): the display of @root
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*/
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GdkDisplay *
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gtk_root_get_display (GtkRoot *self)
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{
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GtkRootInterface *iface;
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g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
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iface = GTK_ROOT_GET_IFACE (self);
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return iface->get_display (self);
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}
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GtkConstraintSolver *
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gtk_root_get_constraint_solver (GtkRoot *self)
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{
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GtkRootInterface *iface;
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g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
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iface = GTK_ROOT_GET_IFACE (self);
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return iface->get_constraint_solver (self);
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}
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/**
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* gtk_root_set_focus:
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* @self: a #GtkRoot
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* @focus: (allow-none): widget to be the new focus widget, or %NULL
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* to unset the focus widget
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*
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* If @focus is not the current focus widget, and is focusable, sets
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* it as the focus widget for the root. If @focus is %NULL, unsets
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* the focus widget for the root.
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*
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* To set the focus to a particular widget in the root, it is usually
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* more convenient to use gtk_widget_grab_focus() instead of this function.
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*/
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void
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gtk_root_set_focus (GtkRoot *self,
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GtkWidget *focus)
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{
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g_return_if_fail (GTK_IS_ROOT (self));
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g_return_if_fail (focus == NULL || GTK_IS_WIDGET (focus));
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g_object_set (self, "focus-widget", focus, NULL);
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}
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/**
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* gtk_root_get_focus:
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* @self: a #GtkRoot
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*
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* Retrieves the current focused widget within the root.
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*
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* Note that this is the widget that would have the focus
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* if the root is active; if the root is not focused then
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* `gtk_widget_has_focus (widget)` will be %FALSE for the
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* widget.
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*
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* Returns: (nullable) (transfer none): the currently focused widget,
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* or %NULL if there is none.
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*/
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GtkWidget *
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gtk_root_get_focus (GtkRoot *self)
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{
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GtkWidget *focus;
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g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
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g_object_get (self, "focus-widget", &focus, NULL);
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if (focus)
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g_object_unref (focus);
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return focus;
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}
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guint
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gtk_root_install_properties (GObjectClass *object_class,
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guint first_prop)
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{
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g_object_class_override_property (object_class, first_prop + GTK_ROOT_PROP_FOCUS_WIDGET, "focus-widget");
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return GTK_ROOT_NUM_PROPERTIES;
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}
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