/*
* Copyright (c) 2023 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 Scrollbar structure
*
*/
#ifndef _UI_PRIVATE_SCROLLBAR_H
#define _UI_PRIVATE_SCROLLBAR_H
#include <gfx/coord.h>
#include <stdbool.h>
#include <types/ui/scrollbar.h>
/** Actual structure of scrollbar.
*
* This is private to libui.
*/
struct ui_scrollbar {
/** Base control object */
struct ui_control *control;
/** UI */
struct ui *ui;
/** UI window containing scrollbar */
struct ui_window *window;
/** Callbacks */
struct ui_scrollbar_cb *cb;
/** Callback argument */
void *arg;
/** Scrollbar rectangle */
gfx_rect_t rect;
/** Scrollbar direction */
ui_scrollbar_dir_t dir;
/** Thumb length */
gfx_coord_t thumb_len;
/** Up button */
struct ui_pbutton *up_btn;
/** Down button */
struct ui_pbutton *down_btn;
/** Thumb is currently held down */
bool thumb_held;
/** Upper trough is currently held down */
bool upper_trough_held;
/** Pointer is inside upper trough */
bool upper_trough_inside;
/** Lower trough is currently held down */
bool lower_trough_held;
/** Pointer is inside lower trough */
bool lower_trough_inside;
/** Position where thumb was pressed */
gfx_coord2_t press_pos;
/** Last thumb position */
gfx_coord_t last_pos;
/** Thumb position */
gfx_coord_t pos;
/** Last cursor position (when trough is held) */
gfx_coord2_t last_curs_pos;
};
/** Scrollbar geometry.
*
* Computed rectangles of scrollbar elements.
*/
typedef struct {
/** Up button rectangle */
gfx_rect_t up_btn_rect;
/** Trough rectangle */
gfx_rect_t trough_rect;
/** Upper trough rectangle */
gfx_rect_t upper_trough_rect;
/** Thumb rectangle */
gfx_rect_t thumb_rect;
/** Lower trough rectangle */
gfx_rect_t lower_trough_rect;
/** Down button rectangle */
gfx_rect_t down_btn_rect;
} ui_scrollbar_geom_t;
extern errno_t ui_scrollbar_paint_gfx(ui_scrollbar_t *);
extern errno_t ui_scrollbar_paint_text(ui_scrollbar_t *);
extern void ui_scrollbar_get_geom(ui_scrollbar_t *, ui_scrollbar_geom_t *);
#endif
/** @}
*/