SDK 冲刺批①+②+⑤: meow_box 线性布局 + meow_anim 动画基座 + meow_scroll 滚动物理
- meow_box（include/meow_ui_box.h + meow_ui_box.c）：竖直/水平容器；子项=固定|weight|wrap； margin/padding/gap；主轴对齐 start/center/end/space-between/around/evenly；交叉轴 start/center/end/stretch； 嵌套（深度≤16 静态栈，单遍求解，无递归爆炸）。可作 meow_view 布局提供者 （meow_view_set_layout/relayout，opt-in；未设布局的 view 保持现有绝对坐标行为）。 新增 meow_widget_set_rect（只写字段不标脏）作为 box 写坐标的通道。 - meow_anim（include/meow_ui_anim.h + meow_ui_anim.c）：时间驱动 tween（from/to/duration/easing： linear/ease-out/ease-in-out/overshoot）+ update/done 回调；静态池≤16、取消、并行多动画； meow_anim_set_region 让每帧只 flush 动画影响区（不整屏）。meow_anim_tick 挂主循环 on_tick， 无动画零开销（只查计数即返回）。 - meow_scroll（include/meow_ui_scroll.h + meow_ui_scroll.c）：速度跟踪（最近 N 采样加权）+ 松手 fling （减速度曲线，用 anim 基座驱动）+ 边界过冲 clamp + 简单回弹（不做 spring）+ 可选 snap； 跟手拖动行为不变（track 内部调既有 set_scroll）；每帧只 redraw 列表视口区；不引 libm。 - 追加式：既有 meow_row/column/box 与全部 meow_*_create/hit/scroll 签名一行未改；旧绝对坐标永远有效； 既有 App 免改源码。 - 验证：宿主新测试 box(42)/anim(32)/scroll(17) 全 PASS；既存 9 回归（widgets/sdk_input_keys/ime_fix/ pinyin/overlay_suppress/notif_gesture/sdk_fixes/sb_collapse/p1p2p3_repro）全 PASS； 离屏 demo（demo_box_scroll.c）渲染 box 布局 + 列表 fling 正常；zig-mipsel -Wall -Wextra 全 TU 0 warning； meow_ui.a md5 83dd6a2d0d24cc748a8659c29f1de2b5（未重链/部署 hello/files/ncm/reader，由主会话统一处理）。
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/* test_meow_ui_scroll.c — §12.3 meow_scroll 滚动物理宿主验证：
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* 跟手拖动（track 跟随与 clamp）、速度跟踪→松手 fling（位移序列/停止位置/单调/不越界）、
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* 边界过冲 clamp + 简单回弹、snap。时间推进用真实 usleep（meow_anim_tick 驱动 fling）。
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*
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* 编译（宿主 gcc，链真实 gfx/sys/theme/vol/log/widget/draw/activity/ime + 打桩 font/global）：
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* gcc -o test_meow_ui_scroll test_meow_ui_scroll.c test_host_stub.c \
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* meow_ui_gfx.c meow_ui_sys.c meow_ui_theme.c meow_ui_vol.c meow_ui_log.c \
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* meow_ui_widget.c meow_ui_input.c meow_ui_activity.c meow_ui_dialog.c meow_ui_ime.c \
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* meow_pinyin.c meow_ui_draw.c meow_ui_view.c meow_ui_box.c meow_ui_anim.c meow_ui_scroll.c \
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* meow_ui_img.c meow_ui_media.c meow_notify_ipc.c stb_image.c \
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* -I. -I../meow_launcherd -DMEOW_UI_HOST_TEST -pthread -lm
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* 运行：./test_meow_ui_scroll
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*/
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#include "meow_ui.h"
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#include "meow_ui_internal.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int g_pass = 0, g_fail = 0;
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#define CHECK(cond, ...) do { \
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if (cond) { g_pass++; } \
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else { g_fail++; printf("FAIL %s:%d ", __FILE__, __LINE__); printf(__VA_ARGS__); printf("\n"); } \
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} while (0)
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#define LIST_H 400
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#define ITEM_H 44
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#define COUNT 50
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/* max_scroll = COUNT*ITEM_H - LIST_H = 2200 - 400 = 1800 */
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#define MAXS (COUNT * ITEM_H - LIST_H)
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static int src(int idx, char *label, int len, void *ctx)
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{
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(void)ctx;
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if (idx < 0 || idx >= COUNT) return 0;
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snprintf(label, (size_t)len, "row %d", idx);
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return 1;
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}
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static meow_widget *make_list(void)
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{
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meow_widget *lv = meow_list_create(0, 0, 480, LIST_H, COUNT, src, NULL);
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meow_list_set_item_h(lv, ITEM_H);
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return lv;
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}
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/* 喂一串向下（正）速度采样，模拟快速下划 */
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static void feed_drag(meow_scroll *s, int step, int n)
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{
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uint64_t now = meow_ui_time_ms();
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for (int i = 0; i < n; i++) {
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meow_scroll_track(s, step, now + (uint64_t)i * 16);
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}
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/* 最后用一个真实稍晚时刻的 track 让采样时间戳真实（保持一致钟） */
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meow_scroll_track(s, 0, meow_ui_time_ms());
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}
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static void pump_until_idle(meow_scroll *s, int *max_off, int *mono_ok)
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{
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int prev = meow_scroll_offset(s);
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int guard = 0;
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while (meow_scroll_active(s) && guard++ < 300) {
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meow_anim_tick();
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int cur = meow_scroll_offset(s);
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if (*max_off < cur) *max_off = cur;
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if (cur < prev) *mono_ok = 0; /* 下划 fling 应单调不减（回弹段除外：此处只测无回弹） */
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prev = cur;
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usleep(10000);
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}
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meow_anim_tick();
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}
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static void test_track_follow(void)
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{
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meow_widget *lv = make_list();
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meow_scroll *s = meow_scroll_wrap(lv, 0);
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CHECK(s != NULL, "wrap");
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CHECK(meow_scroll_offset(s) == 0, "init offset 0");
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meow_scroll_track(s, 10, meow_ui_time_ms());
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CHECK(meow_scroll_offset(s) == 10, "follow +10 got %d", meow_scroll_offset(s));
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/* 超量拖到底：clamp 到 max */
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meow_scroll_track(s, 100000, meow_ui_time_ms());
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CHECK(meow_scroll_offset(s) == MAXS, "clamp to max got %d", meow_scroll_offset(s));
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meow_scroll_free(s);
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meow_widget_free(lv);
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}
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static void test_fling_no_boundary(void)
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{
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meow_widget *lv = make_list();
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meow_scroll *s = meow_scroll_wrap(lv, 0);
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/* 从 0 起拖 ~300px，建正初速 */
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uint64_t t = meow_ui_time_ms();
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for (int i = 0; i < 12; i++) meow_scroll_track(s, 25, t + (uint64_t)i * 16);
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int start = meow_scroll_offset(s);
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CHECK(start > 0, "dragged start>0 got %d", start);
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meow_scroll_fling(s);
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CHECK(meow_scroll_active(s) == 1, "fling active");
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int max_off = start, mono = 1, prev = start;
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int guard = 0;
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while (meow_scroll_active(s) && guard++ < 300) {
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meow_anim_tick();
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int cur = meow_scroll_offset(s);
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if (max_off < cur) max_off = cur;
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if (cur < prev) mono = 0;
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prev = cur;
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usleep(10000);
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}
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meow_anim_tick();
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int end = meow_scroll_offset(s);
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CHECK(mono == 1, "monotonic non-decreasing during fling");
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CHECK(end >= start, "fling advances end=%d start=%d", end, start);
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CHECK(end <= MAXS, "no overflow end=%d max=%d", end, MAXS);
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CHECK(meow_scroll_active(s) == 0, "settles idle");
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meow_scroll_free(s);
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meow_widget_free(lv);
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}
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static void test_fling_boundary_bounce(void)
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{
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meow_widget *lv = make_list();
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meow_scroll *s = meow_scroll_wrap(lv, 0);
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/* 先拖到近底（~1700） */
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meow_list_set_scroll(lv, 1700);
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/* 快速下划，冲过底界 */
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uint64_t t = meow_ui_time_ms();
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for (int i = 0; i < 8; i++) meow_scroll_track(s, 40, t + (uint64_t)i * 16);
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meow_scroll_fling(s);
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int max_off = 0, mono = 1;
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pump_until_idle(s, &max_off, &mono);
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int end = meow_scroll_offset(s);
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CHECK(max_off <= MAXS, "never exceed max, max_off=%d max=%d", max_off, MAXS);
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CHECK(end == MAXS, "bounce settles at bottom end=%d", end); /* 回弹后回到底 */
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CHECK(meow_scroll_active(s) == 0, "idle after bounce");
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meow_scroll_free(s);
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meow_widget_free(lv);
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}
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static void test_snap(void)
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{
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meow_widget *lv = make_list();
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meow_scroll *s = meow_scroll_wrap(lv, 0);
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meow_scroll_set_snap(s, ITEM_H); /* 吸附到行边界 */
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/* 慢拖到某非边界位置并给 small velocity → fling 结束 snap 到行倍数 */
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uint64_t t = meow_ui_time_ms();
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for (int i = 0; i < 6; i++) meow_scroll_track(s, 20, t + (uint64_t)i * 16);
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meow_scroll_fling(s);
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int max_off = 0, mono = 1;
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pump_until_idle(s, &max_off, &mono);
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int end = meow_scroll_offset(s);
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CHECK((end % ITEM_H) == 0, "snap to item multiple got %d", end);
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CHECK(end <= MAXS, "snap in range %d", end);
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meow_scroll_free(s);
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meow_widget_free(lv);
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}
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static void test_stop(void)
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{
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meow_widget *lv = make_list();
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meow_scroll *s = meow_scroll_wrap(lv, 0);
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uint64_t t = meow_ui_time_ms();
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for (int i = 0; i < 6; i++) meow_scroll_track(s, 20, t + (uint64_t)i * 16);
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meow_scroll_fling(s);
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CHECK(meow_scroll_active(s) == 1, "fling active (stop test)");
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meow_scroll_stop(s);
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CHECK(meow_scroll_active(s) == 0, "stopped immediately");
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meow_scroll_free(s);
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meow_widget_free(lv);
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}
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int main(void)
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{
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meow_ui_opts o = { 480, 720 };
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if (meow_ui_init(&o) != 0) { printf("init failed\n"); return 1; }
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test_track_follow();
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test_fling_no_boundary();
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test_fling_boundary_bounce();
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test_snap();
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test_stop();
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meow_ui_shutdown();
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printf("scroll: %d pass / %d fail\n", g_pass, g_fail);
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return g_fail ? 1 : 0;
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}
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