diff --git a/Tactility/Source/Tactility.cpp b/Tactility/Source/Tactility.cpp index d97a2adb..59008428 100644 --- a/Tactility/Source/Tactility.cpp +++ b/Tactility/Source/Tactility.cpp @@ -33,6 +33,7 @@ namespace app { namespace addgps { extern const AppManifest manifest; } namespace alertdialog { extern const AppManifest manifest; } namespace applist { extern const AppManifest manifest; } + namespace calculator { extern const AppManifest manifest; } namespace chat { extern const AppManifest manifest; } namespace boot { extern const AppManifest manifest; } namespace display { extern const AppManifest manifest; } @@ -74,6 +75,7 @@ static void registerSystemApps() { addApp(app::addgps::manifest); addApp(app::alertdialog::manifest); addApp(app::applist::manifest); + addApp(app::calculator::manifest); addApp(app::display::manifest); addApp(app::files::manifest); addApp(app::gpio::manifest); diff --git a/Tactility/Source/app/calculator/Calculator.cpp b/Tactility/Source/app/calculator/Calculator.cpp new file mode 100644 index 00000000..a0a4f732 --- /dev/null +++ b/Tactility/Source/app/calculator/Calculator.cpp @@ -0,0 +1,230 @@ +#include +#include +#include +#include +#include +#include +#include + +namespace tt::app::calculator { + +constexpr const char* TAG = "Calculator"; + +class CalculatorApp : public App { + + lv_obj_t* displayLabel; + lv_obj_t* resultLabel; + char formulaBuffer[128] = {0}; // Stores the full input expression + bool newInput = true; + + static void button_event_cb(lv_event_t* e) { + CalculatorApp* self = static_cast(lv_event_get_user_data(e)); + lv_obj_t* btnm = lv_event_get_current_target_obj(e); + lv_event_code_t code = lv_event_get_code(e); + + uint32_t btn_id = lv_buttonmatrix_get_selected_button(btnm); + const char* txt = lv_buttonmatrix_get_button_text(btnm, btn_id); + + if (code == LV_EVENT_VALUE_CHANGED) { + self->handleInput(txt); + } + } + + void handleInput(const char* txt) { + if (std::strcmp(txt, "C") == 0) { + resetCalculator(); + return; + } + + if (std::strcmp(txt, "=") == 0) { + evaluateExpression(); + return; + } + + if (std::strlen(formulaBuffer) + std::strlen(txt) < sizeof(formulaBuffer) - 1) { + if (newInput) { + std::memset(formulaBuffer, 0, sizeof(formulaBuffer)); + newInput = false; + } + std::strcat(formulaBuffer, txt); + lv_label_set_text(displayLabel, formulaBuffer); + } + } + + void evaluateExpression() { + double result = computeFormula(); + + size_t formulaLen = std::strlen(formulaBuffer); + size_t maxAvailable = sizeof(formulaBuffer) - formulaLen - 1; + + if (maxAvailable > 10) { + char resultBuffer[32]; + snprintf(resultBuffer, sizeof(resultBuffer), " = %.8g", result); + strncat(formulaBuffer, resultBuffer, maxAvailable); + } else { + snprintf(formulaBuffer, sizeof(formulaBuffer), "%.8g", result); + } + + lv_label_set_text(displayLabel, "0"); + lv_label_set_text(resultLabel, formulaBuffer); + newInput = true; + } + + double computeFormula() { + return evaluateRPN(infixToRPN(std::string(formulaBuffer))); + } + + int precedence(char op) { + if (op == '+' || op == '-') return 1; + if (op == '*' || op == '/') return 2; + return 0; + } + + std::queue infixToRPN(const std::string& infix) { + std::stack opStack; + std::queue output; + std::string token; + size_t i = 0; + + while (i < infix.size()) { + char ch = infix[i]; + + if (isdigit(ch)) { + token.clear(); + while (i < infix.size() && (isdigit(infix[i]) || infix[i] == '.')) { + token += infix[i++]; + } + output.push(token); + continue; + } + + if (ch == '(') { + opStack.push(ch); + } else if (ch == ')') { + while (!opStack.empty() && opStack.top() != '(') { + output.push(std::string(1, opStack.top())); + opStack.pop(); + } + opStack.pop(); + } else if (strchr("+-*/", ch)) { + while (!opStack.empty() && precedence(opStack.top()) >= precedence(ch)) { + output.push(std::string(1, opStack.top())); + opStack.pop(); + } + opStack.push(ch); + } + + i++; + } + + while (!opStack.empty()) { + output.push(std::string(1, opStack.top())); + opStack.pop(); + } + + return output; + } + + double evaluateRPN(std::queue rpnQueue) { + std::stack values; + + while (!rpnQueue.empty()) { + std::string token = rpnQueue.front(); + rpnQueue.pop(); + + if (isdigit(token[0])) { + values.push(std::stod(token)); + } else if (strchr("+-*/", token[0])) { + if (values.size() < 2) return 0; + + double b = values.top(); + values.pop(); + double a = values.top(); + values.pop(); + + if (token[0] == '+') values.push(a + b); + else if (token[0] == '-') + values.push(a - b); + else if (token[0] == '*') + values.push(a * b); + else if (token[0] == '/' && b != 0) + values.push(a / b); + } + } + + return values.empty() ? 0 : values.top(); + } + + void resetCalculator() { + std::memset(formulaBuffer, 0, sizeof(formulaBuffer)); + lv_label_set_text(displayLabel, "0"); + lv_label_set_text(resultLabel, ""); + newInput = true; + } + + void onShow(AppContext& context, lv_obj_t* parent) override { + lv_obj_remove_flag(parent, LV_OBJ_FLAG_SCROLLABLE); + lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN); + + lv_obj_t* toolbar = tt::lvgl::toolbar_create(parent, context); + lv_obj_align(toolbar, LV_ALIGN_TOP_MID, 0, 0); + + lv_obj_t* wrapper = lv_obj_create(parent); + lv_obj_set_flex_flow(wrapper, LV_FLEX_FLOW_ROW); + lv_obj_set_flex_align(wrapper, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_START); + lv_obj_set_width(wrapper, LV_PCT(100)); + lv_obj_set_height(wrapper, LV_SIZE_CONTENT); + lv_obj_set_flex_grow(wrapper, 0); + lv_obj_set_style_pad_top(wrapper, 4, LV_PART_MAIN); + lv_obj_set_style_pad_bottom(wrapper, 4, LV_PART_MAIN); + lv_obj_set_style_pad_left(wrapper, 10, LV_PART_MAIN); + lv_obj_set_style_pad_right(wrapper, 10, LV_PART_MAIN); + lv_obj_set_style_pad_column(wrapper, 40, LV_PART_MAIN); + lv_obj_set_style_border_width(wrapper, 0, 0); + lv_obj_remove_flag(wrapper, LV_OBJ_FLAG_SCROLLABLE); + + displayLabel = lv_label_create(wrapper); + lv_label_set_text(displayLabel, "0"); + lv_obj_set_width(displayLabel, LV_SIZE_CONTENT); + lv_obj_set_align(displayLabel, LV_ALIGN_LEFT_MID); + + resultLabel = lv_label_create(wrapper); + lv_label_set_text(resultLabel, ""); + lv_obj_set_width(resultLabel, LV_SIZE_CONTENT); + lv_obj_set_align(resultLabel, LV_ALIGN_RIGHT_MID); + + static const char* btn_map[] = { + "(", ")", "C", "/", "\n", + "7", "8", "9", "*", "\n", + "4", "5", "6", "-", "\n", + "1", "2", "3", "+", "\n", + "0", "=", "", "", "" + }; + + lv_obj_t* btnm = lv_btnmatrix_create(parent); + lv_btnmatrix_set_map(btnm, btn_map); + + lv_obj_set_style_pad_all(btnm, 5, LV_PART_MAIN); + lv_obj_set_style_pad_row(btnm, 10, LV_PART_MAIN); + lv_obj_set_style_pad_column(btnm, 5, LV_PART_MAIN); + lv_obj_set_style_border_width(btnm, 0, LV_PART_MAIN); + + lv_obj_set_style_border_width(btnm, 0, LV_PART_MAIN); + if (lv_display_get_horizontal_resolution(nullptr) <= 240 || lv_display_get_vertical_resolution(nullptr) <= 240) { //small screens + lv_obj_set_size(btnm, lv_pct(100), lv_pct(60)); + } else { //large screens + lv_obj_set_size(btnm, lv_pct(100), lv_pct(80)); + } + lv_obj_align(btnm, LV_ALIGN_BOTTOM_MID, 0, -5); + + lv_obj_add_event_cb(btnm, button_event_cb, LV_EVENT_VALUE_CHANGED, this); + } +}; + +extern const AppManifest manifest = { + .id = "Calculator", + .name = "Calculator", + .createApp = create +}; + +} // namespace tt::app::calculator