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Page: ex_gui_sectionlist_8c example
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N_QUERY Module N_RANDOM Module N_SHA256 Module N_STR Module N_TIFF Module N_TIME Module N_USER Module N_X509 Module N_ZIP Module PARTICLES Module PCRE Module PHYSICS Module SIGNALS Module STACK Module THREADS Module TRAJECTORY Module TREE Module ZLIB Modules Pages Struct A4_BMP Struct A4_TIMER Struct AABB3D Struct ANIM_DATA Struct ANIM_FRAME Struct ANIM_GFX Struct ANIM_LIB Struct ASTAR_BOX Struct ASTAR_CELL Struct ASTAR_GRID Struct ASTAR_HEAP Struct ASTAR_HEAP_NODE Struct ASTAR_NODE Struct ASTAR_PATH Struct AVRO_FIELD Struct AVRO_READER Struct AVRO_SCHEMA Struct BITMAP Struct CALLBACK_DATA Struct CA_CTX Struct CLIENT_JOB Struct CLIENT_STATE Struct CONFIG_FILE Struct CONFIG_FILE_SECTION Struct CYPHER_PARAM Struct DATA Struct DEMO_PANEL Struct DICTIONARY_DEFINITION Struct DICTIONARY_ENTRY Struct DIFF_OUT Struct DIFF_TEXT Struct DRAW_STATE Struct DR_ENTITY Struct DR_STATE Struct DR_VEC3 Struct ExceptionContextList Struct FONT Struct GAME_ENV Struct H2BUF Struct H2_DYN_ENTRY Struct H2_STREAM Struct HASH_NODE Struct HASH_TABLE Struct ISO_DRAW_ENTRY Struct ISO_MAP Struct ISO_PROJECTION Struct ISO_TILE_SEGMENT Struct ISO_TILE_SEGMENTS Struct ISO_VISIBLE_EDGES Struct JS_STATE Struct LEX_ITEM Struct LIST Struct LIST_NODE Struct LOG_LEVELS Struct LexMenu Struct MEMBER Struct MIDI Struct NESTED Struct NETWORK Struct NETWORK_HTTP_INFO Struct NETWORK_POOL Struct NETWORK_SSL_THREAD_PARAMS Struct NETW_ACCEPT_POOL Struct NETW_ACCEPT_POOL_STATS Struct NETW_MSG Struct NETW_SNI_ARG Struct NODE_DATA Struct N_ATLAS Struct N_ATLAS_PAGE Struct N_CLOCK_SYNC Struct N_COOKIE Struct N_COOKIE_JAR Struct N_DIFF_LINE Struct N_DIFF_RESULT Struct N_DISK_CACHE Struct N_ENTROPY_BIT Struct N_ENTROPY_POS Struct N_FILE_INFO Struct N_FLUID Struct N_FLUID_THREAD_PARAMS Struct N_FORM_FIELD Struct N_GIT_COMMIT_INFO Struct N_GIT_REMOTE_AUTH Struct N_GIT_REPO Struct N_GIT_STATUS_ENTRY Struct N_GUI_BUTTON_DATA Struct N_GUI_CHECKBOX_DATA Struct N_GUI_COLOR_PICKER Struct N_GUI_COMBOBOX_DATA Struct N_GUI_CTX Struct N_GUI_CUSTOM_DATA Struct N_GUI_DATAGRID_COL Struct N_GUI_DATAGRID_DATA Struct N_GUI_DROPMENU_DATA Struct N_GUI_DROPMENU_ENTRY Struct N_GUI_GRID_CALLBACKS Struct N_GUI_HEXVIEW_DATA Struct N_GUI_IMAGE_DATA Struct N_GUI_KVTABLE Struct N_GUI_KV_CONTENT Struct N_GUI_KV_ROW Struct N_GUI_LABEL_DATA Struct N_GUI_LISTBOX_DATA Struct N_GUI_LISTITEM Struct N_GUI_MARKDOWNVIEW_DATA Struct N_GUI_MD_FONTS Struct N_GUI_MD_STYLE Struct N_GUI_MEAS_ENTRY Struct N_GUI_MOUSE_EVENT Struct N_GUI_PENDING_GEOM Struct N_GUI_PENDING_WIDGET Struct N_GUI_POPUP Struct N_GUI_PROGRESSBAR_DATA Struct N_GUI_RADIOLIST_DATA Struct N_GUI_SB_TRACK Struct N_GUI_SCROLLBAR_DATA Struct N_GUI_SECTION Struct N_GUI_SECTIONLIST Struct N_GUI_SLIDER_DATA Struct N_GUI_SPLITPANE_DATA Struct N_GUI_STYLE Struct N_GUI_SUGGEST_SINK Struct N_GUI_SYNTAXVIEW_DATA Struct N_GUI_TAB_PANEL Struct N_GUI_TB_BUTTONS Struct N_GUI_TEXTAREA_DATA Struct N_GUI_TEXT_DIMS Struct N_GUI_THEME Struct N_GUI_TREE Struct N_GUI_TREE_NODE Struct N_GUI_TREE_STATE Struct N_GUI_WIDGET Struct N_GUI_WINDOW Struct N_H2_FRAME Struct N_H2_HEADER Struct N_H2_HPACK Struct N_H2_REQUEST Struct N_H2_SERVER Struct N_H2_SETTING Struct N_HTML_ATTR_ Struct N_HTML_FORM Struct N_HTML_TAG_ Struct N_HTTP3_RESPONSE Struct N_HTTP_FIELD Struct N_HTTP_FORM Struct N_HTTP_FORM_MULTIPART Struct N_HTTP_FORM_PART Struct N_HTTP_MULTIPART_PART Struct N_HTTP_REQUEST Struct N_HTTP_RESP Struct N_HTTP_RESPONSE Struct N_HTTP_SERVER Struct N_HTTP_SERVER_CONFIG Struct N_HTTP_SERVER_REQUEST Struct N_HTTP_SERVER_STATS Struct N_HTTP_SET_COOKIE Struct N_HTTP_STREAM Struct N_ISO_CAMERA Struct N_ISO_OBJECT Struct N_KAFKA Struct N_KAFKA_EVENT Struct N_MOCK_SERVER Struct N_MODULE Struct N_PARALLEL_SLICE Struct N_PARALLEL_TEAM Struct N_PARALLEL_WORKER Struct N_PCRE Struct N_PROXY_CFG Struct N_PTH Struct N_PTH_TENSOR Struct N_QUERY Struct N_ROUTE Struct N_ROUTER Struct N_ROUTE_MATCH Struct N_SHA256 Struct N_SOCKET Struct N_SPAWN_PIPE Struct N_SSE_CONN Struct N_SSE_EVENT Struct N_STR Struct N_TIFF Struct N_TIFF_ENTRY Struct N_TIME Struct N_URL Struct N_URL_PARAM Struct N_USER Struct N_USERLIST Struct N_WS_CONN Struct N_WS_FRAME Struct N_WS_MESSAGE Struct N_ZIP_MEMBER Struct OCTREE Struct OCTREE_NODE Struct PARSER Struct PARTICLE Struct PARTICLE_EMITTER Struct PARTICLE_SYSTEM Struct PEER Struct PHYSICS Struct PK_OBJ Struct PK_VM Struct POINT2D Struct POINT3D Struct PRETTY_OUT Struct QNODE Struct QUADTREE Struct QUADTREE_NODE Struct REC Struct RGB Struct SAMPLE Struct SEEN Struct SHARER Struct SRV Struct SRV_ARG Struct STACK Struct STACK_ITEM Struct SYNTAX_RUN Struct THREAD_POOL Struct THREAD_POOL_NODE Struct THREAD_WAITING_PROC Struct TRAJECTORY Struct TRAJECTORY_POINT Struct TREE Struct TREE_NODE Struct TS_LOG Struct WAYPOINT3D Struct WORKER_ARG Struct ZIP_SINK Struct _N_DC_ENTRY Struct _N_DC_GROUP_ENTRY Struct _N_GUI_COLORWHEEL Struct _N_GUI_COLORWHEEL_BLOCK Struct _N_GUI_COLORWHEEL_MOUSE Struct _N_GUI_CURVE Struct _N_GUI_CURVE_BLOCK Struct _N_GUI_CURVE_MOUSE Struct _N_GUI_GRID Struct _N_GUI_POPUP_ENTRY Struct _N_GUI_POPUP_LEVEL Struct _N_GUI_SB_SKIN Struct _N_GUI_TA_STEP Struct _N_GUI_THUMB Struct _N_GUI_WRAP_ACC Struct _compiled Struct _conn Struct _ip_slot Struct _mp_param Struct _n_civil Struct _seg Struct client Struct collector Struct date_vector Struct md_atom Struct md_cells Struct md_hit Struct md_line_ctx Struct mline Struct n_http_req_header Struct n_http_req_limits Struct n_http_request Struct n_markdown_block Struct n_markdown_doc Struct n_markdown_inline Struct n_markdown_span Struct n_reactor_stats Struct n_url_safe Struct n_url_safe_head Struct n_wrap_item Struct producer_state Struct rects Struct reply Struct runner Struct sink Struct tbuf Struct wrap_hit Struct wrap_span Structures Union COORD_VALUE Union HASH_DATA Union NODE_DATA_TYPES Union STACK_DATA dir_310dcdd4703e877a6b99d5dc3fc54d27 dir_68267d1309a1af8e8297ef4c3efbcdba dir_d28a4824dc47e487b107a5db32ef43c4 dir_d44c64559bbebec7f509842c48db8b23 ex__accept__pool__client_8c ex__accept__pool__server_8c ex__allegro__4_8c ex__atlas_8c ex__avro_8c ex__base64_8c ex__bind__exclusive_8c ex__clipboard_8c ex__clock__sync_8c ex__common_8c ex__configfile_8c ex__cookies_8c ex__crypto_8c ex__diff_8c ex__digest_8c ex__disk__cache_8c ex__dns_8c ex__ecc_8c ex__entropy_8c ex__exceptions_8c ex__file_8c ex__file__copy_8c ex__fluid_8c ex__fluid__config_8c ex__fluid__config_8h ex__git_8c ex__gui_8c ex__gui__bench_8c ex__gui__button__keys_8c ex__gui__checkbox__label_8c ex__gui__checkbox__release_8c ex__gui__color__picker_8c ex__gui__colorwheel_8c ex__gui__combobox__items_8c ex__gui__combobox__wheel_8c ex__gui__cursor_8c ex__gui__curve_8c ex__gui__custom_8c ex__gui__custom__mouse_8c ex__gui__datagrid_8c ex__gui__datagrid__keys_8c ex__gui__datagrid__sort_8c ex__gui__detach_8c ex__gui__dictionary_8c ex__gui__display__fallback_8c ex__gui__double__click_8c ex__gui__dropmenu_8c ex__gui__frameless__drag_8c ex__gui__global__scroll_8c ex__gui__glyph_8c ex__gui__grid_8c ex__gui__hexview_8c ex__gui__hover_8c ex__gui__isometric_8c ex__gui__kvtable_8c ex__gui__label__fits_8c ex__gui__label__lines_8c ex__gui__layout__persist_8c ex__gui__listbox_8c ex__gui__md_8c ex__gui__multiwin_8c ex__gui__network_8c ex__gui__particles_8c ex__gui__placeholder_8c ex__gui__popup_8c ex__gui__progressbar_8c ex__gui__reentrant_8c ex__gui__round_8c ex__gui__sectionlist_8c ex__gui__slider__default_8c ex__gui__slider__handle_8c ex__gui__slider__step_8c ex__gui__splitpane_8c ex__gui__suggest_8c ex__gui__syntaxview_8c ex__gui__text__shorten_8c ex__gui__textarea__selection_8c ex__gui__tooltip_8c ex__gui__tree__lazy_8c ex__gui__tree__order_8c ex__gui__tree__state_8c ex__gui__window__rect_8c ex__gui__zorder_8c ex__hash_8c ex__hex_8c ex__html_8c ex__http2_8c ex__http2__server_8c ex__http3_8c ex__http__cookie_8c ex__http__form_8c ex__http__mime_8c ex__http__req_8c ex__http__response_8c ex__http__router_8c ex__http__server_8c ex__icc_8c ex__iso__astar_8c ex__json_8c ex__kafka_8c ex__linalg_8c ex__list_8c ex__log_8c ex__markdown_8c ex__module_8c ex__monolith_8c ex__network_8c ex__network_8h ex__network__accept_8c ex__network__alpn_8c ex__network__connect__abort_8c ex__network__mock_8c ex__network__proxy_8c ex__network__reactor_8c ex__network__sni_8c ex__network__sse_8c ex__network__ssl_8c ex__network__ssl__hardened_8c ex__network__ssl__hostname_8c ex__network__ssl__nonblock_8c ex__network__tls__defaults_8c ex__network__ws_8c ex__network__ws__limits_8c ex__nstr_8c ex__parallel__for_8c ex__parallel__team_8c ex__pcre_8c ex__pretty_8c ex__pth_8c ex__query_8c ex__random_8c ex__sha256_8c ex__signals_8c ex__spawn_8c ex__ssrf_8c ex__stack_8c ex__thread__pool__discard_8c ex__thread__pool__wait_8c ex__threads_8c ex__tiff_8c ex__time__formats_8c ex__trajectory_8c ex__trees_8c ex__url_8c ex__url__safe_8c ex__wrap_8c ex__x509_8c ex__zip_8c ex__zlib_8c ex_accept_pool_client_8c example ex_accept_pool_server_8c example ex_allegro_4_8c example ex_atlas_8c example ex_base64_8c example ex_clock_sync_8c example ex_common_8c example ex_configfile_8c example ex_cookies_8c example ex_crypto_8c example ex_diff_8c example ex_digest_8c example ex_disk_cache_8c example ex_dns_8c example ex_ecc_8c example ex_entropy_8c example ex_exceptions_8c example ex_file_8c example ex_file_copy_8c example ex_fluid_8c example ex_fluid_config_8c example ex_fluid_config_8h example ex_git_8c example ex_gui_8c example ex_gui_bench_8c example ex_gui_button_keys_8c example ex_gui_checkbox_label_8c example ex_gui_checkbox_release_8c example ex_gui_color_picker_8c example ex_gui_colorwheel_8c example ex_gui_combobox_items_8c example ex_gui_combobox_wheel_8c example ex_gui_cursor_8c example ex_gui_curve_8c example ex_gui_custom_8c example ex_gui_custom_mouse_8c example ex_gui_datagrid_8c example ex_gui_datagrid_keys_8c example ex_gui_datagrid_sort_8c example ex_gui_detach_8c example ex_gui_dictionary_8c example ex_gui_display_fallback_8c example ex_gui_double_click_8c example ex_gui_dropmenu_8c example ex_gui_frameless_drag_8c example ex_gui_global_scroll_8c example ex_gui_glyph_8c example ex_gui_grid_8c example ex_gui_hexview_8c example ex_gui_hover_8c example ex_gui_isometric_8c example ex_gui_kvtable_8c example ex_gui_label_fits_8c example ex_gui_label_lines_8c example ex_gui_layout_persist_8c example ex_gui_listbox_8c example ex_gui_md_8c example ex_gui_multiwin_8c example ex_gui_network_8c example ex_gui_particles_8c example ex_gui_placeholder_8c example ex_gui_popup_8c example ex_gui_progressbar_8c example ex_gui_reentrant_8c example ex_gui_round_8c example ex_gui_sectionlist_8c example ex_gui_slider_default_8c example ex_gui_slider_handle_8c example ex_gui_slider_step_8c example ex_gui_splitpane_8c example ex_gui_suggest_8c example ex_gui_syntaxview_8c example ex_gui_text_shorten_8c example ex_gui_textarea_selection_8c example ex_gui_tooltip_8c example ex_gui_tree_lazy_8c example ex_gui_tree_order_8c example ex_gui_tree_state_8c example ex_gui_window_rect_8c example ex_gui_zorder_8c example ex_hash_8c example ex_hex_8c example ex_html_8c example ex_http2_8c example ex_http2_server_8c example ex_http_cookie_8c example ex_http_form_8c example ex_http_mime_8c example ex_http_req_8c example ex_http_response_8c example ex_http_router_8c example ex_http_server_8c example ex_icc_8c example ex_iso_astar_8c example ex_json_8c example ex_kafka_8c example ex_linalg_8c example ex_list_8c example ex_log_8c example ex_markdown_8c example ex_module_8c example ex_monolith_8c example ex_network_8c example ex_network_8h example ex_network_accept_8c example ex_network_alpn_8c example ex_network_connect_abort_8c example ex_network_mock_8c example ex_network_proxy_8c example ex_network_reactor_8c example ex_network_sni_8c example ex_network_sse_8c example ex_network_ssl_8c example ex_network_ssl_hardened_8c example ex_network_ssl_hostname_8c example ex_network_ssl_nonblock_8c example ex_network_tls_defaults_8c example ex_network_ws_8c example ex_network_ws_limits_8c example ex_nstr_8c example ex_parallel_for_8c example ex_parallel_team_8c example ex_pcre_8c example ex_pretty_8c example ex_pth_8c example ex_query_8c example ex_random_8c example ex_sha256_8c example ex_signals_8c example ex_spawn_8c example ex_ssrf_8c example ex_stack_8c example ex_threads_8c example ex_tiff_8c example ex_time_formats_8c example ex_trajectory_8c example ex_trees_8c example ex_url_8c example ex_url_safe_8c example ex_wrap_8c example ex_x509_8c example ex_zip_8c example ex_zlib_8c example mainpage_8dox n__3d_8c n__3d_8h n__aabb_8c n__aabb_8h n__allegro5_8c n__allegro5_8h n__allegro__4_8c n__allegro__4_8h n__anim_8c n__anim_8h n__astar_8c n__astar_8h n__atlas_8c n__atlas_8h n__avro_8c n__avro_8h n__base64_8c n__base64_8h n__clipboard_8c n__clipboard_8h n__clock__sync_8c n__clock__sync_8h n__common_8c n__common_8h n__config__file_8c n__config__file_8h n__cookies_8c n__cookies_8h n__crypto_8c n__crypto_8h n__dead__reckoning_8c n__dead__reckoning_8h n__diff_8c n__diff_8h n__digest_8c n__digest_8h n__disk__cache_8c n__disk__cache_8h n__dns_8c n__dns_8h n__ecc_8c n__ecc_8h n__entropy_8c n__entropy_8h n__enum_8h n__exceptions_8c n__exceptions_8h n__files_8c n__files_8h n__fluids_8c n__fluids_8h n__games_8c n__games_8h n__git_8c n__git_8h n__gui_8c n__gui_8h n__gui__color_8c n__gui__color_8h n__gui__colorwheel_8c n__gui__colorwheel_8h n__gui__curve_8c n__gui__curve_8h n__gui__grid_8c n__gui__grid_8h n__gui__md_8c n__gui__md_8h n__gui__popup_8c n__gui__popup_8h n__hash_8c n__hash_8h n__hex_8c n__hex_8h n__html_8c n__html_8h n__http2_8c n__http2_8h n__http2__server_8c n__http2__server_8h n__http3_8c n__http3_8h n__http__cookie_8c n__http__cookie_8h n__http__form_8c n__http__form_8h n__http__mime_8c n__http__mime_8h n__http__req_8c n__http__req_8h n__http__response_8c n__http__response_8h n__http__router_8c n__http__router_8h n__http__server_8c n__http__server_8h n__icc_8c n__icc_8h n__iso__engine_8c n__iso__engine_8h n__json_8c n__json_8h n__kafka_8c n__kafka_8h n__linalg_8c n__linalg_8h n__list_8c n__list_8h n__log_8c n__log_8h n__lz4_8c n__lz4_8h n__markdown_8c n__markdown_8h n__module_8c n__module_8h n__network_8c n__network_8h n__network__accept__pool_8c n__network__accept__pool_8h n__network__msg_8c n__network__msg_8h n__nodup__log_8c n__nodup__log_8h n__openssl__compat_8h n__particles_8c n__particles_8h n__pcre_8c n__pcre_8h n__pretty_8c n__pretty_8h n__pth_8c n__pth_8h n__query_8c n__query_8h n__random_8c n__random_8h n__reactor_8c n__reactor_8h n__sha256_8c n__sha256_8h n__signals_8c n__signals_8h n__ssrf_8c n__ssrf_8h n__stack_8c n__stack_8h n__str_8c n__str_8h n__thread__pool_8c n__thread__pool_8h n__tiff_8c n__tiff_8h n__time_8c n__time_8h n__trajectory_8c n__trajectory_8h n__trees_8c n__trees_8h n__url__safe_8c n__url__safe_8h n__user_8c n__user_8h n__windows_8h n__wrap_8c n__wrap_8h n__x509_8c n__x509_8h n__zip_8c n__zip_8h n__zlib_8c n__zlib_8h nilorea_8h
7 ex_gui_sectionlist_8c example
gullradriel edited this page 2026-10-12 07:59:13 +02:00
Table of Contents

ex_gui_sectionlist.c

N_GUI_SECTIONLIST folding, offsets and hidden members (headless). The accordion stacks sections in one window: a header per section and the member widgets under it, with a fold that hides the members and pulls everything below up.

Two of the calls checked here are for a caller whose layout is not fixed at build time - one that recomputes every widget's rectangle when its window is resized, or whose sections hold a different number of controls from one moment to the next. n_gui_sectionlist_set_widget_offset() restates where a member sits inside its section, and n_gui_sectionlist_set_widget_hidden() takes one out of the stack without removing it. ```c

/*

  • Nilorea Library
  • Copyright (C) 2005-2026 Castagnier Mickael
  • Licensed under the Apache License, Version 2.0 (the "License");
  • you may not use this file except in compliance with the License.
  • You may obtain a copy of the License at
  • http://www.apache.org/licenses/LICENSE-2.0
  • Unless required by applicable law or agreed to in writing, software
  • distributed under the License is distributed on an "AS IS" BASIS,
  • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  • implied. See the License for the specific language governing
  • permissions and limitations under the License.
  • SPDX-License-Identifier: Apache-2.0 */

#define ALLEGRO_UNSTABLE 1

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h>

#include "nilorea/n_common.h" #include "nilorea/n_gui.h" #include "nilorea/n_log.h"

static int log_level = LOG_ERR; static int failures = 0;

static int process_args(int argc, char** argv) { int opt; while ((opt = getopt(argc, argv, "V:")) != -1) { switch (opt) { case 'V': if (!strcmp("LOG_NULL", optarg)) log_level = LOG_NULL; else if (!strcmp("LOG_NOTICE", optarg)) log_level = LOG_NOTICE; else if (!strcmp("LOG_INFO", optarg)) log_level = LOG_INFO; else if (!strcmp("LOG_ERR", optarg)) log_level = LOG_ERR; else if (!strcmp("LOG_DEBUG", optarg)) log_level = LOG_DEBUG; else return -1; break; default: return -1; } } return 0; }

static void expect_close(const char* label, float got, float want, float tol) { float d = got - want; if (d < 0) d = -d; if (d > tol) { n_log(LOG_ERR, "%s: got %.3f, expected %.3f", label, got, want); failures++; } }

static void expect_true(const char* label, int cond) { if (!cond) { n_log(LOG_ERR, "%s: condition false", label); failures++; } }

/* where a widget sits now / static float widget_y(N_GUI_CTX gui, int id) { const N_GUI_WIDGET* w = n_gui_get_widget(gui, id); return w ? w->y : -1.0f; }

static int widget_visible(N_GUI_CTX* gui, int id) { return n_gui_widget_is_visible(gui, id); }

int main(int argc, char** argv) { set_log_level(LOG_ERR); if (process_args(argc, argv) != 0) { fprintf(stderr, "Usage: %s [-V LOG_LEVEL]\n", argv[0]); return 2; } set_log_level(log_level);

if (!al_init() || !al_init_font_addon()) {
    n_log(LOG_ERR, "allegro init failed");
    return 1;
}
ALLEGRO_FONT* font = al_create_builtin_font();
if (!font) {
    n_log(LOG_ERR, "al_create_builtin_font failed");
    return 1;
}
N_GUI_CTX* gui = n_gui_new_ctx(font);
if (!gui) {
    n_log(LOG_ERR, "n_gui_new_ctx failed");
    al_destroy_font(font);
    return 1;
}
n_gui_set_display_size(gui, 400.0f, 800.0f);

int win = n_gui_add_window(gui, "Panel", 0.0f, 0.0f, 400.0f, 800.0f);
expect_true("window created", win >= 0);

/* Two sections of two members each. The header height is 20, the gap 4,
 * and the members are 30 tall, which makes every number below arithmetic
 * anybody can check by hand. */
N_GUI_SECTIONLIST* sl = n_gui_sectionlist_create(gui, win, 10.0f, 10.0f, 200.0f, 20.0f,
                                                 4.0f, NULL, NULL);
expect_true("section list created", sl != NULL);
if (!sl) {
    n_gui_destroy_ctx(&gui);
    al_destroy_font(font);
    return 1;
}

int first = n_gui_sectionlist_add_section(sl, "First", 10.0f, 0);
int a = n_gui_add_button(gui, win, "a", 10.0f, 34.0f, 200.0f, 30.0f, N_GUI_SHAPE_ROUNDED,
                         NULL, NULL);
int b = n_gui_add_button(gui, win, "b", 10.0f, 64.0f, 200.0f, 30.0f, N_GUI_SHAPE_ROUNDED,
                         NULL, NULL);
n_gui_sectionlist_add_widget(sl, first, a);
n_gui_sectionlist_add_widget(sl, first, b);

int second = n_gui_sectionlist_add_section(sl, "Second", 200.0f, 0);
int c = n_gui_add_button(gui, win, "c", 10.0f, 224.0f, 200.0f, 30.0f, N_GUI_SHAPE_ROUNDED,
                         NULL, NULL);
n_gui_sectionlist_add_widget(sl, second, c);
expect_true("two sections", n_gui_sectionlist_get_count(sl) == 2);

/* Stacked from y0: header at 10, its members at 34 and 64, the second
 * header after the first section's 60 of content plus a gap. */
n_gui_sectionlist_relayout(sl);
expect_close("first member", widget_y(gui, a), 34.0f, 0.01f);
expect_close("second member", widget_y(gui, b), 64.0f, 0.01f);
expect_close("second header's member", widget_y(gui, c), 122.0f, 0.01f);
/* 10 from the top, then per section a 20 header, a 4 gap, its content and
   another 4: 10 + 24 + 60 + 4 + 24 + 30 + 4. */
expect_close("content height", n_gui_sectionlist_content_height(sl), 156.0f, 0.01f);

/* Folding hides the members and pulls what is below them up. */
n_gui_sectionlist_set_folded(sl, first, 1);
expect_true("folded is folded", n_gui_sectionlist_is_folded(sl, first) == 1);
expect_true("a is hidden", !widget_visible(gui, a));
expect_true("b is hidden", !widget_visible(gui, b));
expect_close("the second section came up", widget_y(gui, c), 58.0f, 0.01f);

n_gui_sectionlist_set_folded(sl, first, 0);
expect_true("a is back", widget_visible(gui, a));
expect_close("and where it was", widget_y(gui, a), 34.0f, 0.01f);

/* A caller that lays its own members out says where they are. Moving b
 * down by ten moves the section's height and everything under it. */
n_gui_sectionlist_set_widget_offset(sl, first, b, 40.0f);
n_gui_sectionlist_relayout(sl);
expect_close("b at its new offset", widget_y(gui, b), 74.0f, 0.01f);
expect_close("the section grew", widget_y(gui, c), 132.0f, 0.01f);

/* A member the caller keeps hidden is not shown by an unfold and does not
 * count towards the height. With b out, the first section is a's thirty
 * rather than b's seventy, so what is under it comes up by forty. */
n_gui_sectionlist_set_widget_hidden(sl, first, b, 1);
n_gui_sectionlist_relayout(sl);
expect_true("hidden stays hidden", !widget_visible(gui, b));
expect_true("a is still shown", widget_visible(gui, a));
expect_close("the section shrank to what is left", widget_y(gui, c), 92.0f, 0.01f);

n_gui_sectionlist_set_widget_hidden(sl, first, b, 0);
n_gui_sectionlist_relayout(sl);
expect_true("unhidden comes back", widget_visible(gui, b));
expect_close("and the height with it", widget_y(gui, c), 132.0f, 0.01f);

/* A folded section hides a member the caller had hidden as well, and
 * unfolding does not bring it back. */
n_gui_sectionlist_set_widget_hidden(sl, first, b, 1);
n_gui_sectionlist_set_folded(sl, first, 1);
expect_true("both hidden while folded", !widget_visible(gui, a) && !widget_visible(gui, b));
n_gui_sectionlist_set_folded(sl, first, 0);
expect_true("only the caller's stays hidden",
            widget_visible(gui, a) && !widget_visible(gui, b));

/* And the whole list moved and widened, which is what a resized window
   does to it. Everything stacks from the new origin. */
n_gui_sectionlist_set_widget_hidden(sl, first, b, 0);
n_gui_sectionlist_set_geometry(sl, 20.0f, 50.0f, 300.0f, 20.0f, 4.0f);
n_gui_sectionlist_relayout(sl);
expect_close("moved to the new origin", widget_y(gui, a), 74.0f, 0.01f);
{
    N_GUI_WIDGET* hdr = n_gui_get_widget(gui, sl->sections[0].header_id);
    expect_close("and widened with it", hdr ? hdr->w : 0.0f, 300.0f, 0.01f);
    expect_close("from the new left", hdr ? hdr->x : 0.0f, 20.0f, 0.01f);
    /* The height too, and it is the one of the four worth checking: a
     * window that reflows its widgets when it is resized scales a header
     * like anything else, and a relayout that set only the other three
     * left that scaling in place. */
    if (hdr) hdr->h = 145.0f;
    n_gui_sectionlist_relayout(sl);
    expect_close("and the header keeps its own height", hdr ? hdr->h : 0.0f, 20.0f, 0.01f);
}

/* Another order: the second section on top. Its member then sits under
 * the first header position, and the first section follows it. From
 * y0 50: second header 50, c at 74, then 30 of c and a gap; first
 * header at 108, a at 132. */
{
    const int flipped[2] = {1, 0};
    const int messy[3] = {1, 1, 7};

    n_gui_sectionlist_set_order(sl, flipped, 2);
    expect_true("the order reads back", n_gui_sectionlist_get_order(sl, 0) == second &&
                                            n_gui_sectionlist_get_order(sl, 1) == first);
    expect_close("the second section's member on top", widget_y(gui, c), 74.0f, 0.01f);
    expect_close("the first section's below it", widget_y(gui, a), 132.0f, 0.01f);
    /* A section left out: gone with its header, the rest closes up. */
    n_gui_sectionlist_set_section_hidden(sl, second, 1);
    expect_true("a hidden section says so", n_gui_sectionlist_is_section_hidden(sl, second) == 1);
    expect_true("its member is hidden", !widget_visible(gui, c));
    expect_true("and its header",
                !widget_visible(gui, sl->sections[second].header_id));
    expect_close("the first comes up to the top", widget_y(gui, a), 74.0f, 0.01f);
    expect_close("and the height counts it alone", n_gui_sectionlist_content_height(sl), 148.0f, 0.01f);
    n_gui_sectionlist_set_section_hidden(sl, second, 0);
    expect_true("shown again", widget_visible(gui, c));
    /* An order with a repeat and an index that is not there still gives
     * every section once. */
    n_gui_sectionlist_set_order(sl, messy, 3);
    expect_true("a messy order is made whole", n_gui_sectionlist_get_order(sl, 0) == second &&
                                                   n_gui_sectionlist_get_order(sl, 1) == first);
    expect_true("past the end is -1", n_gui_sectionlist_get_order(sl, 2) == -1);
}

/* A full section refuses a member, says so, and returns -1; the one
 * that fits returns 0. Found in AfterAPro, whose plugin section
 * outgrew 48 members and lost four without a word. */
{
    int third = n_gui_sectionlist_add_section(sl, "Full", 600.0f, 0);
    int k = 0, refused = 0, added = 0;

    for (k = 0; k < N_GUI_SECTION_WIDGETS_MAX + 1; k++) {
        int w = n_gui_add_label(gui, win, "x", 10.0f, 630.0f, 50.0f, 10.0f, N_GUI_ALIGN_LEFT);
        if (n_gui_sectionlist_add_widget(sl, third, w) == 0)
            added++;
        else
            refused++;
    }
    expect_true("a section takes N_GUI_SECTION_WIDGETS_MAX members", added == N_GUI_SECTION_WIDGETS_MAX);
    expect_true("and refuses the next with -1", refused == 1);
}

n_gui_sectionlist_free(&sl);
expect_true("freed", sl == NULL);

n_gui_destroy_ctx(&gui);
al_destroy_font(font);

if (failures) {
    n_log(LOG_ERR, "ex_gui_sectionlist: %d failure(s)", failures);
    return 1;
}
n_log(LOG_NOTICE, "ex_gui_sectionlist: all checks passed");
return 0;

}


_Filename: ex_gui_sectionlist.c_

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