/*
* 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 Label
*/
#include <errno.h>
#include <gfx/context.h>
#include <gfx/render.h>
#include <gfx/text.h>
#include <stdlib.h>
#include <str.h>
#include <ui/control.h>
#include <ui/paint.h>
#include <ui/label.h>
#include "../private/label.h"
#include "../private/resource.h"
static void ui_label_ctl_destroy(void *);
static errno_t ui_label_ctl_paint(void *);
static ui_evclaim_t ui_label_ctl_pos_event(void *, pos_event_t *);
/** Label control ops */
ui_control_ops_t ui_label_ops = {
.destroy = ui_label_ctl_destroy,
.paint = ui_label_ctl_paint,
.pos_event = ui_label_ctl_pos_event
};
/** Create new label.
*
* @param resource UI resource
* @param text Text
* @param rlabel Place to store pointer to new label
* @return EOK on success, ENOMEM if out of memory
*/
errno_t ui_label_create(ui_resource_t *resource, const char *text,
ui_label_t **rlabel)
{
ui_label_t *label;
errno_t rc;
label = calloc(1, sizeof(ui_label_t));
if (label == NULL)
return ENOMEM;
rc = ui_control_new(&ui_label_ops, (void *) label, &label->control);
if (rc != EOK) {
free(label);
return rc;
}
label->text = str_dup(text);
if (label->text == NULL) {
ui_control_delete(label->control);
free(label);
return ENOMEM;
}
label->res = resource;
label->halign = gfx_halign_left;
*rlabel = label;
return EOK;
}
/** Destroy label.
*
* @param label Label or @c NULL
*/
void ui_label_destroy(ui_label_t *label)
{
if (label == NULL)
return;
ui_control_delete(label->control);
free(label);
}
/** Get base control from label.
*
* @param label Label
* @return Control
*/
ui_control_t *ui_label_ctl(ui_label_t *label)
{
return label->control;
}
/** Set label rectangle.
*
* @param label Label
* @param rect New label rectangle
*/
void ui_label_set_rect(ui_label_t *label, gfx_rect_t *rect)
{
label->rect = *rect;
}
/** Set label horizontal text alignment.
*
* @param label Label
* @param halign Horizontal alignment
*/
void ui_label_set_halign(ui_label_t *label, gfx_halign_t halign)
{
label->halign = halign;
}
/** Set label vertical text alignment.
*
* @param label Label
* @param valign Vertical alignment
*/
void ui_label_set_valign(ui_label_t *label, gfx_valign_t valign)
{
label->valign = valign;
}
/** Set label text.
*
* @param label Label
* @param text New label text
* @return EOK on success, ENOMEM if out of memory
*/
errno_t ui_label_set_text(ui_label_t *label, const char *text)
{
char *tcopy;
tcopy = str_dup(text);
if (tcopy == NULL)
return ENOMEM;
free(label->text);
label->text = tcopy;
return EOK;
}
/** Paint label.
*
* @param label Label
* @return EOK on success or an error code
*/
errno_t ui_label_paint(ui_label_t *label)
{
gfx_text_fmt_t fmt;
gfx_coord2_t pos;
errno_t rc;
/* Paint label background */
rc = gfx_set_color(label->res->gc, label->res->wnd_face_color);
if (rc != EOK)
goto error;
rc = gfx_fill_rect(label->res->gc, &label->rect);
if (rc != EOK)
goto error;
switch (label->halign) {
case gfx_halign_left:
case gfx_halign_justify:
pos.x = label->rect.p0.x;
break;
case gfx_halign_center:
pos.x = (label->rect.p0.x + label->rect.p1.x) / 2;
break;
case gfx_halign_right:
pos.x = label->rect.p1.x;
break;
}
switch (label->valign) {
case gfx_valign_top:
pos.y = label->rect.p0.y;
break;
case gfx_valign_center:
pos.y = (label->rect.p0.y + label->rect.p1.y) / 2;
break;
case gfx_valign_bottom:
pos.y = label->rect.p1.y;
break;
case gfx_valign_baseline:
return EINVAL;
}
gfx_text_fmt_init(&fmt);
fmt.font = label->res->font;
fmt.color = label->res->wnd_text_color;
fmt.halign = label->halign;
fmt.valign = label->valign;
rc = gfx_puttext(&pos, &fmt, label->text);
if (rc != EOK)
goto error;
rc = gfx_update(label->res->gc);
if (rc != EOK)
goto error;
return EOK;
error:
return rc;
}
/** Destroy label control.
*
* @param arg Argument (ui_label_t *)
*/
void ui_label_ctl_destroy(void *arg)
{
ui_label_t *label = (ui_label_t *) arg;
ui_label_destroy(label);
}
/** Paint label control.
*
* @param arg Argument (ui_label_t *)
* @return EOK on success or an error code
*/
errno_t ui_label_ctl_paint(void *arg)
{
ui_label_t *label = (ui_label_t *) arg;
return ui_label_paint(label);
}
/** Handle label control position event.
*
* @param arg Argument (ui_label_t *)
* @param pos_event Position event
* @return @c ui_claimed iff the event is claimed
*/
ui_evclaim_t ui_label_ctl_pos_event(void *arg, pos_event_t *event)
{
ui_label_t *label = (ui_label_t *) arg;
(void) label;
return ui_unclaimed;
}
/** @}
*/