/* * 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 /** @} */