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/* gtklayoutmanager.h: Layout manager base class
* Copyright 2019 The GNOME Foundation
*
* 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/>.
*
* Author: Emmanuele Bassi
*/
#pragma once
#include <gsk/gsk.h>
#include <gtk/gtktypes.h>
#include <gtk/gtkwidget.h>
#include <gtk/gtklayoutchild.h>
G_BEGIN_DECLS
#define GTK_TYPE_LAYOUT_MANAGER (gtk_layout_manager_get_type ())
GDK_AVAILABLE_IN_ALL
G_DECLARE_DERIVABLE_TYPE (GtkLayoutManager, gtk_layout_manager, GTK, LAYOUT_MANAGER, GObject)
/**
* GtkLayoutManagerClass:
* @get_request_mode: a virtual function, used to return the preferred
* request mode for the layout manager; for instance, "width for height"
* or "height for width"; see `GtkSizeRequestMode`
* @measure: a virtual function, used to measure the minimum and preferred
* sizes of the widget using the layout manager for a given orientation
* @allocate: a virtual function, used to allocate the size of the widget
* using the layout manager
* @layout_child_type: the type of `GtkLayoutChild` used by this layout manager
* @create_layout_child: a virtual function, used to create a `GtkLayoutChild`
* meta object for the layout properties
* @root: a virtual function, called when the widget using the layout
* manager is attached to a `GtkRoot`
* @unroot: a virtual function, called when the widget using the layout
* manager is detached from a `GtkRoot`
*
* The `GtkLayoutManagerClass` structure contains only private data, and
* should only be accessed through the provided API, or when subclassing
* `GtkLayoutManager`.
*/
struct _GtkLayoutManagerClass
{
/*< private >*/
GObjectClass parent_class;
/*< public >*/
GtkSizeRequestMode (* get_request_mode) (GtkLayoutManager *manager,
GtkWidget *widget);
void (* measure) (GtkLayoutManager *manager,
GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
void (* allocate) (GtkLayoutManager *manager,
GtkWidget *widget,
int width,
int height,
int baseline);
GType layout_child_type;
/**
* GtkLayoutManagerClass::create_layout_child:
* @manager: the `GtkLayoutManager`
* @widget: the widget using the @manager
* @for_child: the child of @widget
*
* Create a `GtkLayoutChild` instance for the given @for_child widget.
*
* Returns: (transfer full): a `GtkLayoutChild`
*/
GtkLayoutChild * (* create_layout_child) (GtkLayoutManager *manager,
GtkWidget *widget,
GtkWidget *for_child);
void (* root) (GtkLayoutManager *manager);
void (* unroot) (GtkLayoutManager *manager);
/*< private >*/
gpointer _padding[16];
};
GDK_AVAILABLE_IN_ALL
void gtk_layout_manager_measure (GtkLayoutManager *manager,
GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
GDK_AVAILABLE_IN_ALL
void gtk_layout_manager_allocate (GtkLayoutManager *manager,
GtkWidget *widget,
int width,
int height,
int baseline);
GDK_AVAILABLE_IN_ALL
GtkSizeRequestMode gtk_layout_manager_get_request_mode (GtkLayoutManager *manager);
GDK_AVAILABLE_IN_ALL
GtkWidget * gtk_layout_manager_get_widget (GtkLayoutManager *manager);
GDK_AVAILABLE_IN_ALL
void gtk_layout_manager_layout_changed (GtkLayoutManager *manager);
GDK_AVAILABLE_IN_ALL
GtkLayoutChild * gtk_layout_manager_get_layout_child (GtkLayoutManager *manager,
GtkWidget *child);
G_END_DECLS
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