Files
tactility_apps/Apps/Snake/main/Source/Snake.cpp
T
Shadowtrance dbf850c434 Fixes and new apps (#30)
- M5 Unit Modules library + M5 Unit Test app
- Minor fixes for TodoList, TwoEleven, Snake, Brainfuck and Breakout
- Fixed SerialConsole to use the uart controller as it was broken in one of the many updates
- Fixed keyboard input in TwoEleven, Breakout, Magic8Ball and Snake
- Bluetooth Media Keys app, supports pressing physical keys to trigger the corresponding buttonmatrix button
- Epub Reader app
2026-06-07 15:56:32 +02:00

323 lines
12 KiB
C++

/**
* @file Snake.cpp
* @brief Snake game app implementation for Tactility
*/
#include "Snake.h"
#include <inttypes.h>
#include <tt_lvgl_toolbar.h>
#include <tt_app_alertdialog.h>
#include <tt_app_selectiondialog.h>
#include <tt_preferences.h>
#include <TactilityCpp/LvglLock.h>
#include <tactility/lvgl_module.h>
#include <tactility/lvgl_fonts.h>
constexpr auto* TAG = "Snake";
// Preferences keys for high scores (one per difficulty)
static constexpr const char* PREF_NAMESPACE = "Snake";
static constexpr const char* PREF_HIGH_EASY = "high_easy";
static constexpr const char* PREF_HIGH_MED = "high_med";
static constexpr const char* PREF_HIGH_HARD = "high_hard";
static constexpr const char* PREF_HIGH_HELL = "high_hell";
// High scores for each difficulty (loaded from preferences)
static int32_t highScoreEasy = 0;
static int32_t highScoreMedium = 0;
static int32_t highScoreHard = 0;
static int32_t highScoreHell = 0;
static constexpr size_t DIFFICULTY_COUNT = 4;
// Selection dialog indices (0 = How to Play, 1-4 = difficulties)
static constexpr int32_t SELECTION_HOW_TO_PLAY = 0;
static constexpr int32_t SELECTION_EASY = 1;
static constexpr int32_t SELECTION_MEDIUM = 2;
static constexpr int32_t SELECTION_HARD = 3;
static constexpr int32_t SELECTION_HELL = 4;
// Difficulty options (cell sizes - larger = easier)
// Hell uses same size as Hard but with wall collision enabled
static const uint16_t difficultySizes[DIFFICULTY_COUNT] = { SNAKE_CELL_LARGE, SNAKE_CELL_MEDIUM, SNAKE_CELL_SMALL, SNAKE_CELL_SMALL };
static uint32_t getToolbarHeight(UiDensity uiDensity) {
if (uiDensity == LVGL_UI_DENSITY_COMPACT) {
return lvgl_get_text_font_height(FONT_SIZE_DEFAULT) * 1.4f;
} else {
return lvgl_get_text_font_height(FONT_SIZE_LARGE) * 2.2f;
}
}
static uint32_t getActionIconPadding(UiDensity uiDensity) {
auto toolbar_height = getToolbarHeight(uiDensity);
return (uiDensity != LVGL_UI_DENSITY_COMPACT) ? (uint32_t)(toolbar_height * 0.2f) : 8;
}
static void loadHighScores() {
PreferencesHandle prefs = tt_preferences_alloc(PREF_NAMESPACE);
if (prefs) {
tt_preferences_opt_int32(prefs, PREF_HIGH_EASY, &highScoreEasy);
tt_preferences_opt_int32(prefs, PREF_HIGH_MED, &highScoreMedium);
tt_preferences_opt_int32(prefs, PREF_HIGH_HARD, &highScoreHard);
tt_preferences_opt_int32(prefs, PREF_HIGH_HELL, &highScoreHell);
tt_preferences_free(prefs);
}
}
static void saveHighScore(int32_t difficulty, int32_t score) {
PreferencesHandle prefs = tt_preferences_alloc(PREF_NAMESPACE);
if (prefs) {
switch (difficulty) {
case SELECTION_EASY:
highScoreEasy = score;
tt_preferences_put_int32(prefs, PREF_HIGH_EASY, score);
break;
case SELECTION_MEDIUM:
highScoreMedium = score;
tt_preferences_put_int32(prefs, PREF_HIGH_MED, score);
break;
case SELECTION_HARD:
highScoreHard = score;
tt_preferences_put_int32(prefs, PREF_HIGH_HARD, score);
break;
case SELECTION_HELL:
highScoreHell = score;
tt_preferences_put_int32(prefs, PREF_HIGH_HELL, score);
break;
}
tt_preferences_free(prefs);
}
}
static int32_t getHighScore(int32_t difficulty) {
switch (difficulty) {
case SELECTION_EASY: return highScoreEasy;
case SELECTION_MEDIUM: return highScoreMedium;
case SELECTION_HARD: return highScoreHard;
case SELECTION_HELL: return highScoreHell;
default: return 0;
}
}
void Snake::showHelpDialog() {
const char* buttons[] = { "OK" };
helpDialogId = tt_app_alertdialog_start(
"How to Play",
"Swipe or use arrow keys to change direction.\n"
"Eat food to grow longer.\n"
"Don't hit yourself!",
buttons, 1);
}
void Snake::showSelectionDialog() {
const char* items[] = { "How to Play", "Easy", "Medium", "Hard", "Hell" };
selectionDialogId = tt_app_selectiondialog_start("Snake", 5, items);
}
void Snake::snakeEventCb(lv_event_t* e) {
Snake* self = (Snake*)lv_event_get_user_data(e);
lv_obj_t* target = lv_event_get_target_obj(e);
lv_event_code_t code = lv_event_get_code(e);
if (code == LV_EVENT_VALUE_CHANGED) {
if (snake_get_game_over(target)) {
int32_t score = snake_get_score(target);
int32_t length = snake_get_length(target);
int32_t prevHighScore = getHighScore(self->currentDifficulty);
bool isNewHighScore = score > prevHighScore;
// Save high score if it's a new record
if (isNewHighScore) {
saveHighScore(self->currentDifficulty, score);
}
const char* alertDialogLabels[] = { "OK" };
char message[120];
if (isNewHighScore && score > 0) {
snprintf(message, sizeof(message), "NEW HIGH SCORE!\n\nSCORE: %" PRId32 "\nLENGTH: %" PRId32,
score, length);
} else {
snprintf(message, sizeof(message), "GAME OVER!\n\nSCORE: %" PRId32 "\nLENGTH: %" PRId32 "\nBEST: %" PRId32,
score, length, getHighScore(self->currentDifficulty));
}
self->gameOverDialogId = tt_app_alertdialog_start(
isNewHighScore && score > 0 ? "NEW HIGH SCORE!" : "GAME OVER!",
message, alertDialogLabels, 1);
} else {
// Update score display
lv_label_set_text_fmt(self->scoreLabel, "SCORE: %u", snake_get_score(self->gameObject));
}
}
}
void Snake::newGameBtnEvent(lv_event_t* e) {
Snake* self = (Snake*)lv_event_get_user_data(e);
if (self == nullptr) {
return;
}
snake_set_new_game(self->gameObject);
// Update score label
if (self->scoreLabel) {
lv_label_set_text_fmt(self->scoreLabel, "SCORE: %u", snake_get_score(self->gameObject));
}
}
void Snake::createGame(lv_obj_t* parent, uint16_t cell_size, bool wallCollision, lv_obj_t* tb) {
lv_obj_remove_flag(parent, LV_OBJ_FLAG_SCROLLABLE);
lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);
// Create game widget
gameObject = snake_create(parent, cell_size, wallCollision);
if (!gameObject) {
return;
}
lv_obj_set_size(gameObject, LV_PCT(100), LV_PCT(100));
lv_obj_set_flex_grow(gameObject, 1);
// Create score wrapper in toolbar
scoreWrapper = lv_obj_create(tb);
lv_obj_set_size(scoreWrapper, LV_SIZE_CONTENT, LV_PCT(100));
lv_obj_set_style_pad_top(scoreWrapper, 4, LV_STATE_DEFAULT);
lv_obj_set_style_pad_bottom(scoreWrapper, 0, LV_STATE_DEFAULT);
lv_obj_set_style_pad_left(scoreWrapper, 0, LV_STATE_DEFAULT);
lv_obj_set_style_pad_right(scoreWrapper, 10, LV_STATE_DEFAULT);
lv_obj_set_style_pad_row(scoreWrapper, 0, LV_STATE_DEFAULT);
lv_obj_set_style_pad_column(scoreWrapper, 0, LV_STATE_DEFAULT);
lv_obj_set_style_border_width(scoreWrapper, 0, LV_STATE_DEFAULT);
lv_obj_set_style_bg_opa(scoreWrapper, 0, LV_STATE_DEFAULT);
lv_obj_remove_flag(scoreWrapper, LV_OBJ_FLAG_SCROLLABLE);
// Create score label
scoreLabel = lv_label_create(scoreWrapper);
lv_label_set_text_fmt(scoreLabel, "SCORE: %u", snake_get_score(gameObject));
lv_obj_set_style_text_align(scoreLabel, LV_TEXT_ALIGN_LEFT, LV_STATE_DEFAULT);
lv_obj_align(scoreLabel, LV_ALIGN_CENTER, 0, 0);
lv_obj_set_size(scoreLabel, LV_SIZE_CONTENT, LV_SIZE_CONTENT);
lv_obj_set_style_text_font(scoreLabel, lv_font_get_default(), 0);
lv_obj_set_style_text_color(scoreLabel, lv_palette_main(LV_PALETTE_GREEN), LV_PART_MAIN);
lv_obj_add_event_cb(gameObject, snakeEventCb, LV_EVENT_VALUE_CHANGED, this);
auto ui_density = lvgl_get_ui_density();
auto toolbar_height = getToolbarHeight(ui_density);
auto icon_padding = getActionIconPadding(ui_density);
// Create new game button wrapper
newGameWrapper = lv_obj_create(tb);
lv_obj_set_width(newGameWrapper, LV_SIZE_CONTENT);
lv_obj_set_flex_flow(newGameWrapper, LV_FLEX_FLOW_ROW);
lv_obj_set_style_pad_all(newGameWrapper, icon_padding / 2, LV_STATE_DEFAULT);
lv_obj_set_style_border_width(newGameWrapper, 0, LV_STATE_DEFAULT);
lv_obj_set_style_bg_opa(newGameWrapper, 0, LV_STATE_DEFAULT);
// Create new game button
lv_obj_t* newGameBtn = lv_btn_create(newGameWrapper);
lv_obj_set_size(newGameBtn, toolbar_height - icon_padding, toolbar_height - icon_padding);
lv_obj_set_style_pad_all(newGameBtn, 0, LV_STATE_DEFAULT);
lv_obj_align(newGameBtn, LV_ALIGN_CENTER, 0, 0);
lv_obj_add_event_cb(newGameBtn, newGameBtnEvent, LV_EVENT_CLICKED, this);
lv_obj_t* btnIcon = lv_image_create(newGameBtn);
lv_image_set_src(btnIcon, LV_SYMBOL_REFRESH);
lv_obj_align(btnIcon, LV_ALIGN_CENTER, 0, 0);
}
void Snake::onHide(AppHandle appHandle) {
scoreLabel = nullptr;
scoreWrapper = nullptr;
toolbar = nullptr;
mainWrapper = nullptr;
newGameWrapper = nullptr;
gameObject = nullptr;
}
void Snake::onShow(AppHandle appHandle, lv_obj_t* parent) {
// Check if we should exit (user closed selection dialog)
if (shouldExit) {
shouldExit = false;
tt_app_stop();
return;
}
lv_obj_remove_flag(parent, LV_OBJ_FLAG_SCROLLABLE);
lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);
// Create toolbar
toolbar = tt_lvgl_toolbar_create_for_app(parent, appHandle);
lv_obj_align(toolbar, LV_ALIGN_TOP_MID, 0, 0);
// Create main wrapper
mainWrapper = lv_obj_create(parent);
lv_obj_set_width(mainWrapper, LV_PCT(100));
lv_obj_set_flex_grow(mainWrapper, 1);
lv_obj_set_style_pad_all(mainWrapper, 2, LV_PART_MAIN);
lv_obj_set_style_pad_row(mainWrapper, 2, LV_PART_MAIN);
lv_obj_set_style_pad_column(mainWrapper, 2, LV_PART_MAIN);
lv_obj_set_style_border_width(mainWrapper, 0, LV_PART_MAIN);
lv_obj_remove_flag(mainWrapper, LV_OBJ_FLAG_SCROLLABLE);
// Load high scores on first show
if (!highScoresLoaded) {
loadHighScores();
highScoresLoaded = true;
}
// Check if we need to show the help dialog
if (showHelpOnShow) {
showHelpOnShow = false;
showHelpDialog();
// Check if we have a pending difficulty selection from onResult
} else if (pendingSelection >= SELECTION_EASY && pendingSelection <= SELECTION_HELL) {
// Force layout update before creating game so dimensions are computed
lv_obj_update_layout(parent);
// Track which difficulty we're playing for high score saving
currentDifficulty = pendingSelection;
// Start game with selected difficulty (convert selection index to difficulty index)
int32_t difficultyIndex = pendingSelection - SELECTION_EASY;
// Hell mode enables wall collision (hitting walls = game over)
bool wallCollision = (pendingSelection == SELECTION_HELL);
createGame(mainWrapper, difficultySizes[difficultyIndex], wallCollision, toolbar);
pendingSelection = -1;
} else {
// Show selection dialog
showSelectionDialog();
}
}
void Snake::onResult(AppHandle appHandle, void* _Nullable data, AppLaunchId launchId, AppResult result, BundleHandle resultData) {
// Don't manipulate LVGL objects here - they may be invalid
// Just store state for onShow to handle
if (launchId == selectionDialogId && selectionDialogId != 0) {
selectionDialogId = 0;
int32_t selection = -1;
if (resultData != nullptr) {
selection = tt_app_selectiondialog_get_result_index(resultData);
}
if (selection == SELECTION_HOW_TO_PLAY) {
// Mark to show help dialog in onShow
showHelpOnShow = true;
} else if (selection >= SELECTION_EASY && selection <= SELECTION_HELL) {
// Store selection for onShow to handle
pendingSelection = selection;
} else {
// User closed dialog without selecting - mark for exit
shouldExit = true;
}
} else if (launchId == helpDialogId && helpDialogId != 0) {
helpDialogId = 0;
// Return to selection dialog
pendingSelection = -1;
} else if (launchId == gameOverDialogId && gameOverDialogId != 0) {
gameOverDialogId = 0;
// Mark to show selection dialog in onShow
pendingSelection = -1;
}
}