PIKApp/libpika/pikaselection.c

105 lines
3.0 KiB
C

/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-2000 Peter Mattis and Spencer Kimball
*
* pikaselection.c
*
* 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 3 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
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "pika.h"
struct _PikaSelection
{
PikaChannel parent_instance;
};
G_DEFINE_TYPE (PikaSelection, pika_selection, PIKA_TYPE_CHANNEL)
#define parent_class pika_selection_parent_class
static void
pika_selection_class_init (PikaSelectionClass *klass)
{
}
static void
pika_selection_init (PikaSelection *selection)
{
}
/**
* pika_selection_get_by_id:
* @selection_id: The selection id.
*
* Returns a #PikaSelection representing @selection_id. This function
* calls pika_item_get_by_id() and returns the item if it is selection
* or %NULL otherwise.
*
* Returns: (nullable) (transfer none): a #PikaSelection for
* @selection_id or %NULL if @selection_id does not represent
* a valid selection. The object belongs to libpika and you
* must not modify or unref it.
*
* Since: 3.0
**/
PikaSelection *
pika_selection_get_by_id (gint32 selection_id)
{
PikaItem *item = pika_item_get_by_id (selection_id);
if (PIKA_IS_SELECTION (item))
return (PikaSelection *) item;
return NULL;
}
/**
* pika_selection_float:
* @image: ignored
* @n_drawables: Size of @drawables.
* @drawables: (array length=n_drawables): The drawables from which to
* float selection.
* @offx: x offset for translation.
* @offy: y offset for translation.
*
* Float the selection from the specified drawable with initial offsets
* as specified.
*
* This procedure determines the region of the specified drawable that
* lies beneath the current selection. The region is then cut from the
* drawable and the resulting data is made into a new layer which is
* instantiated as a floating selection. The offsets allow initial
* positioning of the new floating selection.
*
* Returns: (transfer none): The floated layer.
*/
PikaLayer *
pika_selection_float (PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
gint offx,
gint offy)
{
return _pika_selection_float (n_drawables,
(const PikaItem **) drawables,
offx,
offy);
}