source: mainline/uspace/lib/ui/src/rbutton.c@ b433f68

/*
 * Copyright (c) 2021 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 Radio button
 */

#include <errno.h>
#include <gfx/color.h>
#include <gfx/context.h>
#include <gfx/render.h>
#include <gfx/text.h>
#include <io/pos_event.h>
#include <stdlib.h>
#include <str.h>
#include <ui/control.h>
#include <ui/paint.h>
#include <ui/rbutton.h>
#include "../private/rbutton.h"
#include "../private/resource.h"

enum {
        rbutton_oframe_r = 7,
        rbutton_iframe_r = 6,
        rbutton_interior_r = 5,
        rbutton_indicator_r = 3,
        rbutton_label_margin = 8
};

static void ui_rbutton_ctl_destroy(void *);
static errno_t ui_rbutton_ctl_paint(void *);
static ui_evclaim_t ui_rbutton_ctl_pos_event(void *, pos_event_t *);

/** Radio button control ops */
ui_control_ops_t ui_rbutton_ops = {
        .destroy = ui_rbutton_ctl_destroy,
        .paint = ui_rbutton_ctl_paint,
        .pos_event = ui_rbutton_ctl_pos_event
};

/** Create new radio button group.
 *
 * @param res UI resource
 * @param rgroup Place to store pointer to new radio button group
 * @return EOK on success, ENOMEM if out of memory
 */
errno_t ui_rbutton_group_create(ui_resource_t *res, ui_rbutton_group_t **rgroup)
{
        ui_rbutton_group_t *group;

        group = calloc(1, sizeof(ui_rbutton_group_t));
        if (group == NULL)
                return ENOMEM;

        group->res = res;
        *rgroup = group;
        return EOK;
}

/** Destroy radio button group.
 *
 * @param group Radio button group or @c NULL
 */
void ui_rbutton_group_destroy(ui_rbutton_group_t *group)
{
        if (group == NULL)
                return;

        free(group);
}

/** Create new radio button.
 *
 * @param group Radio button group
 * @param caption Caption
 * @param arg Callback argument
 * @param rrbutton Place to store pointer to new radio button
 * @return EOK on success, ENOMEM if out of memory
 */
errno_t ui_rbutton_create(ui_rbutton_group_t *group, const char *caption,
    void *arg, ui_rbutton_t **rrbutton)
{
        ui_rbutton_t *rbutton;
        errno_t rc;

        rbutton = calloc(1, sizeof(ui_rbutton_t));
        if (rbutton == NULL)
                return ENOMEM;

        rc = ui_control_new(&ui_rbutton_ops, (void *) rbutton,
            &rbutton->control);
        if (rc != EOK) {
                free(rbutton);
                return rc;
        }

        rbutton->caption = str_dup(caption);
        if (rbutton->caption == NULL) {
                ui_control_delete(rbutton->control);
                free(rbutton);
                return ENOMEM;
        }

        rbutton->group = group;
        rbutton->arg = arg;

        if (group->selected == NULL)
                group->selected = rbutton;

        *rrbutton = rbutton;
        return EOK;
}

/** Destroy radio button.
 *
 * @param rbutton Radio button or @c NULL
 */
void ui_rbutton_destroy(ui_rbutton_t *rbutton)
{
        if (rbutton == NULL)
                return;

        ui_control_delete(rbutton->control);
        free(rbutton);
}

/** Get base control from radio button.
 *
 * @param rbutton Radio button
 * @return Control
 */
ui_control_t *ui_rbutton_ctl(ui_rbutton_t *rbutton)
{
        return rbutton->control;
}

/** Set radio button group callbacks.
 *
 * @param group Radio button group
 * @param cb Radio button group callbacks
 * @param arg Callback argument
 */
void ui_rbutton_group_set_cb(ui_rbutton_group_t *group,
    ui_rbutton_group_cb_t *cb, void *arg)
{
        group->cb = cb;
        group->arg = arg;
}

/** Set button rectangle.
 *
 * @param rbutton Button
 * @param rect New button rectangle
 */
void ui_rbutton_set_rect(ui_rbutton_t *rbutton, gfx_rect_t *rect)
{
        rbutton->rect = *rect;
}

/** Paint radio button.
 *
 * @param rbutton Radio button
 * @return EOK on success or an error code
 */
errno_t ui_rbutton_paint(ui_rbutton_t *rbutton)
{
        gfx_coord2_t pos;
        gfx_coord2_t center;
        gfx_text_fmt_t fmt;
        bool depressed;
        errno_t rc;

        center.x = rbutton->rect.p0.x + rbutton_oframe_r;
        center.y = rbutton->rect.p0.y + rbutton_oframe_r;

        /* Paint rbutton frame */

        rc = gfx_set_color(rbutton->group->res->gc,
            rbutton->group->res->wnd_shadow_color);
        if (rc != EOK)
                goto error;

        rc = ui_paint_filled_circle(rbutton->group->res->gc,
            &center, rbutton_oframe_r, ui_fcircle_upleft);
        if (rc != EOK)
                goto error;

        rc = gfx_set_color(rbutton->group->res->gc,
            rbutton->group->res->wnd_highlight_color);
        if (rc != EOK)
                goto error;

        rc = ui_paint_filled_circle(rbutton->group->res->gc,
            &center, rbutton_oframe_r, ui_fcircle_lowright);
        if (rc != EOK)
                goto error;

        rc = gfx_set_color(rbutton->group->res->gc,
            rbutton->group->res->wnd_frame_sh_color);
        if (rc != EOK)
                goto error;

        rc = ui_paint_filled_circle(rbutton->group->res->gc,
            &center, rbutton_iframe_r, ui_fcircle_upleft);
        if (rc != EOK)
                goto error;

        rc = gfx_set_color(rbutton->group->res->gc,
            rbutton->group->res->wnd_face_color);
        if (rc != EOK)
                goto error;

        rc = ui_paint_filled_circle(rbutton->group->res->gc,
            &center, rbutton_iframe_r, ui_fcircle_lowright);
        if (rc != EOK)
                goto error;

        /* Paint rbutton interior */
        depressed = rbutton->held && rbutton->inside;

        rc = gfx_set_color(rbutton->group->res->gc, depressed ?
            rbutton->group->res->entry_act_bg_color :
            rbutton->group->res->entry_bg_color);
        if (rc != EOK)
                goto error;

        rc = ui_paint_filled_circle(rbutton->group->res->gc,
            &center, rbutton_interior_r, ui_fcircle_entire);
        if (rc != EOK)
                goto error;

        /* Paint active mark */

        if (rbutton->group->selected == rbutton) {
                rc = gfx_set_color(rbutton->group->res->gc,
                    rbutton->group->res->entry_fg_color);
                if (rc != EOK)
                        goto error;

                rc = ui_paint_filled_circle(rbutton->group->res->gc,
                    &center, rbutton_indicator_r, ui_fcircle_entire);
                if (rc != EOK)
                        goto error;
        }

        /* Paint rbutton label */

        pos.x = center.x + rbutton_oframe_r + rbutton_label_margin;
        pos.y = center.y;

        gfx_text_fmt_init(&fmt);
        fmt.color = rbutton->group->res->wnd_text_color;
        fmt.halign = gfx_halign_left;
        fmt.valign = gfx_valign_center;

        rc = gfx_puttext(rbutton->group->res->font, &pos, &fmt,
            rbutton->caption);
        if (rc != EOK)
                goto error;

        rc = gfx_update(rbutton->group->res->gc);
        if (rc != EOK)
                goto error;

        return EOK;
error:
        return rc;
}

/** Press down button.
 *
 * @param rbutton Radio button
 */
void ui_rbutton_press(ui_rbutton_t *rbutton)
{
        if (rbutton->held)
                return;

        rbutton->inside = true;
        rbutton->held = true;
        (void) ui_rbutton_paint(rbutton);
}

/** Release button.
 *
 * @param rbutton Radio button
 */
void ui_rbutton_release(ui_rbutton_t *rbutton)
{
        ui_rbutton_t *old_selected;

        if (!rbutton->held)
                return;

        rbutton->held = false;

        if (rbutton->inside) {
                /* Activate radio button */
                old_selected = rbutton->group->selected;

                if (old_selected != rbutton) {
                        rbutton->group->selected = rbutton;
                        ui_rbutton_paint(old_selected);
                }

                /* Repaint and notify */
                (void) ui_rbutton_paint(rbutton);

                if (old_selected != rbutton)
                        ui_rbutton_selected(rbutton);
        }
}

/** Pointer entered button.
 *
 * @param rbutton Radio button
 */
void ui_rbutton_enter(ui_rbutton_t *rbutton)
{
        if (rbutton->inside)
                return;

        rbutton->inside = true;
        if (rbutton->held)
                (void) ui_rbutton_paint(rbutton);
}

/** Pointer left button.
 *
 * @param rbutton Radio button
 */
void ui_rbutton_leave(ui_rbutton_t *rbutton)
{
        if (!rbutton->inside)
                return;

        rbutton->inside = false;
        if (rbutton->held)
                (void) ui_rbutton_paint(rbutton);
}

/** Button was selected.
 *
 * @param rbutton Radio button
 */
void ui_rbutton_selected(ui_rbutton_t *rbutton)
{
        ui_rbutton_group_t *group = rbutton->group;

        if (group->cb != NULL && group->cb->selected != NULL) {
                group->cb->selected(group, group->arg, rbutton->arg);
        }
}

/** Handle radio button position event.
 *
 * @param rbutton Radio button
 * @param pos_event Position event
 * @return @c ui_claimed iff the event is claimed
 */
ui_evclaim_t ui_rbutton_pos_event(ui_rbutton_t *rbutton, pos_event_t *event)
{
        gfx_coord2_t pos;
        bool inside;

        pos.x = event->hpos;
        pos.y = event->vpos;

        inside = gfx_pix_inside_rect(&pos, &rbutton->rect);

        switch (event->type) {
        case POS_PRESS:
                if (inside) {
                        ui_rbutton_press(rbutton);
                        return ui_claimed;
                }
                break;
        case POS_RELEASE:
                if (rbutton->held) {
                        ui_rbutton_release(rbutton);
                        return ui_claimed;
                }
                break;
        case POS_UPDATE:
                if (inside && !rbutton->inside) {
                        ui_rbutton_enter(rbutton);
                        return ui_claimed;
                } else if (!inside && rbutton->inside) {
                        ui_rbutton_leave(rbutton);
                }
                break;
        }

        return ui_unclaimed;
}

/** Destroy radio button control.
 *
 * @param arg Argument (ui_rbutton_t *)
 */
void ui_rbutton_ctl_destroy(void *arg)
{
        ui_rbutton_t *rbutton = (ui_rbutton_t *) arg;

        ui_rbutton_destroy(rbutton);
}

/** Paint radio button control.
 *
 * @param arg Argument (ui_rbutton_t *)
 * @return EOK on success or an error code
 */
errno_t ui_rbutton_ctl_paint(void *arg)
{
        ui_rbutton_t *rbutton = (ui_rbutton_t *) arg;

        return ui_rbutton_paint(rbutton);
}

/** Handle radio button control position event.
 *
 * @param arg Argument (ui_rbutton_t *)
 * @param pos_event Position event
 * @return @c ui_claimed iff the event is claimed
 */
ui_evclaim_t ui_rbutton_ctl_pos_event(void *arg, pos_event_t *event)
{
        ui_rbutton_t *rbutton = (ui_rbutton_t *) arg;

        return ui_rbutton_pos_event(rbutton, event);
}

/** @}
 */