source: mainline/uspace/lib/ui/src/control.c@ 62223ec

/*
 * Copyright (c) 2020 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libui
 * @{
 */
/**
 * @file UI control
 */

#include <errno.h>
#include <io/pos_event.h>
#include <stdlib.h>
#include <ui/control.h>
#include "../private/control.h"

/** Allocate new UI control.
 *
 * @param ops Control ops
 * @param ext Control extended data
 * @param rcontrol Place to store pointer to new control
 * @return EOK on success, ENOMEM if out of memory
 */
errno_t ui_control_new(ui_control_ops_t *ops, void *ext,
    ui_control_t **rcontrol)
{
        ui_control_t *control;

        control = calloc(1, sizeof(ui_control_t));
        if (control == NULL)
                return ENOMEM;

        control->ops = ops;
        control->ext = ext;
        *rcontrol = control;
        return EOK;
}

/** Delete UI control.
 *
 * Deletes the base control (not the extended data).
 *
 * @param control UI control or @c NULL
 */
void ui_control_delete(ui_control_t *control)
{
        if (control == NULL)
                return;

        free(control);
}

/** Destroy UI control.
 *
 * Run the virtual control destructor (destroy complete control including
 * extended data).
 *
 * @param control Control or @c NULL
 */
void ui_control_destroy(ui_control_t *control)
{
        if (control == NULL)
                return;

        return control->ops->destroy(control->ext);
}

/** Paint UI control.
 *
 * @param control Control
 * @return EOK on success or an error code
 */
errno_t ui_control_paint(ui_control_t *control)
{
        return control->ops->paint(control->ext);
}

/** Deliver position event to UI control.
 *
 * @param control Control
 * @param pos_event Position event
 * @return @c ui_claimed iff the event is claimed
 */
ui_evclaim_t ui_control_pos_event(ui_control_t *control, pos_event_t *event)
{
        return control->ops->pos_event(control->ext, event);
}

/** Inform UI control that window has been unfocused.
 *
 * @param control Control
 */
void ui_control_unfocus(ui_control_t *control)
{
        if (control->ops->unfocus != NULL)
                control->ops->unfocus(control->ext);
}

/** @}
 */