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