josh/InfiniTime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases 2 Wiki Activity

Merge branch 'working_calculator'

Browse Source 
(cherry picked from commit 990ad0c87e)
This commit is contained in:
tofasthacker 2023-09-23 23:04:13 -04:00 committed by Josh
parent d6f8de5dc7
commit 9a41646357
5 changed files with 474 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/displayapp/DisplayApp.cpp
View File

@ -30,6 +30,10 @@
#include "displayapp/screens/Weather.h"
#include "displayapp/screens/PassKey.h"
#include "displayapp/screens/Error.h"
#include "displayapp/screens/Weather.h"
// My New Apps
#include "displayapp/screens/Calculator.h"
#include "drivers/Cst816s.h"
#include "drivers/St7789.h"

2
src/displayapp/fonts/fonts.json
View File

@ -7,7 +7,7 @@
},
{
"file": "FontAwesome5-Solid+Brands+Regular.woff",
"range": "0xf294, 0xf242, 0xf54b, 0xf21e, 0xf1e6, 0xf017, 0xf129, 0xf03a, 0xf185, 0xf560, 0xf001, 0xf3fd, 0xf1fc, 0xf45d, 0xf59f, 0xf5a0, 0xf027, 0xf028, 0xf6a9, 0xf04b, 0xf04c, 0xf048, 0xf051, 0xf095, 0xf3dd, 0xf04d, 0xf2f2, 0xf024, 0xf252, 0xf569, 0xf06e, 0xf015, 0xf00c, 0xf0f3, 0xf522, 0xf743"
"range": "0xf294, 0xf242, 0xf54b, 0xf21e, 0xf1e6, 0xf017, 0xf129, 0xf03a, 0xf185, 0xf560, 0xf001, 0xf3fd, 0xf1fc, 0xf45d, 0xf59f, 0xf5a0, 0xf027, 0xf028, 0xf6a9, 0xf04b, 0xf04c, 0xf048, 0xf051, 0xf095, 0xf3dd, 0xf04d, 0xf2f2, 0xf024, 0xf252, 0xf569, 0xf06e, 0xf015, 0xf00c, 0xf0f3, 0xf522, 0xf743, 0xf1ec, 0xf55a"
}
],
"bpp": 1,

397
src/displayapp/screens/Calculator.cpp Normal file
View File

@ -0,0 +1,397 @@
#include <cmath>
#include <cinttypes>
#include <libraries/log/nrf_log.h>
#include "Calculator.h"
#include "displayapp/InfiniTimeTheme.h"
#include "Symbols.h"
using namespace Pinetime::Applications::Screens;
static void eventHandler(lv_obj_t* obj, lv_event_t event) {
auto app = static_cast<Calculator*>(obj->user_data);
app->OnButtonEvent(obj, event);
}
Calculator::~Calculator() {
lv_obj_clean(lv_scr_act());
}
static const char* buttonMap[] = {
"7", "8", "9", Symbols::backspace, "\n", "4", "5", "6", "+ -", "\n", "1", "2", "3", "* /", "\n", "0", ".", "(-)", "=", ""};
Calculator::Calculator() {
resultLabel = lv_label_create(lv_scr_act(), nullptr);
lv_label_set_long_mode(resultLabel, LV_LABEL_LONG_CROP);
lv_label_set_align(resultLabel, LV_LABEL_ALIGN_RIGHT);
lv_label_set_text_fmt(resultLabel, "%" PRId64, result);
lv_obj_set_size(resultLabel, 200, 20);
lv_obj_set_pos(resultLabel, 10, 5);
valueLabel = lv_label_create(lv_scr_act(), nullptr);
lv_label_set_long_mode(valueLabel, LV_LABEL_LONG_CROP);
lv_label_set_align(valueLabel, LV_LABEL_ALIGN_RIGHT);
lv_label_set_text_fmt(valueLabel, "%" PRId64, value);
lv_obj_set_size(valueLabel, 200, 20);
lv_obj_set_pos(valueLabel, 10, 35);
buttonMatrix = lv_btnmatrix_create(lv_scr_act(), nullptr);
buttonMatrix->user_data = this;
lv_obj_set_event_cb(buttonMatrix, eventHandler);
lv_btnmatrix_set_map(buttonMatrix, buttonMap);
lv_btnmatrix_set_one_check(buttonMatrix, true);
lv_obj_set_size(buttonMatrix, 238, 180);
lv_obj_set_style_local_bg_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_DEFAULT, Colors::bgAlt);
lv_obj_set_style_local_pad_inner(buttonMatrix, LV_BTNMATRIX_PART_BG, LV_STATE_DEFAULT, 1);
lv_obj_set_style_local_pad_top(buttonMatrix, LV_BTNMATRIX_PART_BG, LV_STATE_DEFAULT, 1);
lv_obj_set_style_local_pad_bottom(buttonMatrix, LV_BTNMATRIX_PART_BG, LV_STATE_DEFAULT, 1);
lv_obj_set_style_local_pad_left(buttonMatrix, LV_BTNMATRIX_PART_BG, LV_STATE_DEFAULT, 1);
lv_obj_set_style_local_pad_right(buttonMatrix, LV_BTNMATRIX_PART_BG, LV_STATE_DEFAULT, 1);
lv_obj_align(buttonMatrix, nullptr, LV_ALIGN_IN_BOTTOM_MID, 0, 0);
lv_obj_set_style_local_bg_opa(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, LV_OPA_COVER);
lv_obj_set_style_local_bg_grad_stop(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, 128);
lv_obj_set_style_local_bg_main_stop(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, 128);
}
void Calculator::OnButtonEvent(lv_obj_t* obj, lv_event_t event) {
if ((obj == buttonMatrix) && (event == LV_EVENT_PRESSED)) {
HandleInput();
}
}
void Calculator::HandleInput() {
const char* buttonText = lv_btnmatrix_get_active_btn_text(buttonMatrix);
if (buttonText == nullptr) {
return;
}
if ((equalSignPressed && (*buttonText != '=')) || (error != Error::None)) {
ResetInput();
UpdateOperation();
}
// we only compare the first char because it is enough
switch (*buttonText) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': {
// *buttonText is the first char in buttonText
// "- '0'" results in the int value of the char
auto digit = (*buttonText) - '0';
auto sign = (value < 0) ? -1 : 1;
// if this is true, we already pressed the . button
if (offset < FIXED_POINT_OFFSET) {
value += sign * offset * digit;
offset /= 10;
} else if (value <= MAX_VALUE / 10) {
value *= 10;
value += sign * offset * digit;
}
NRF_LOG_INFO(". offset: %" PRId64, offset);
NRF_LOG_INFO(". value: %" PRId64, value);
NRF_LOG_INFO(". result: %" PRId64, result);
} break;
// unary minus
case '(':
value = -value;
NRF_LOG_INFO(". offset: %" PRId64, offset);
NRF_LOG_INFO(". value: %" PRId64, value);
NRF_LOG_INFO(". result: %" PRId64, result);
break;
case '.':
if (offset == FIXED_POINT_OFFSET) {
offset /= 10;
}
NRF_LOG_INFO(". offset: %" PRId64, offset);
NRF_LOG_INFO(". value: %" PRId64, value);
NRF_LOG_INFO(". result: %" PRId64, result);
break;
// for every operator we:
// - eval the current operator if value > FIXED_POINT_OFFSET
// - then set the new operator
// - + and - as well as * and / cycle on the same button
case '+':
if (value != 0) {
Eval();
ResetInput();
}
switch (operation) {
case '+':
operation = '-';
break;
case '-':
operation = ' ';
break;
default:
operation = '+';
break;
}
UpdateOperation();
break;
case '*':
if (value != 0) {
Eval();
ResetInput();
}
switch (operation) {
case '*':
operation = '/';
break;
case '/':
operation = ' ';
break;
default:
operation = '*';
break;
}
UpdateOperation();
break;
// this is a little hacky because it matches only the first char
case Symbols::backspace[0]:
if (value != 0) {
// delete one value digit
if (offset < FIXED_POINT_OFFSET) {
if (offset == 0) {
offset = 1;
} else {
offset *= 10;
}
} else {
value /= 10;
}
if (offset < FIXED_POINT_OFFSET) {
value -= value % (10 * offset);
} else {
value -= value % offset;
}
} else if (offset < FIXED_POINT_OFFSET) {
if (offset == 0) {
offset = 1;
} else {
offset *= 10;
}
} else {
// reset the result
result = 0;
}
NRF_LOG_INFO(". offset: %" PRId64, offset);
NRF_LOG_INFO(". value: %" PRId64, value);
NRF_LOG_INFO(". result: %" PRId64, result);
operation = ' ';
UpdateOperation();
break;
case '=':
equalSignPressed = true;
Eval();
// If the operation is ' ' then we move the value to the result.
// We reset the input after this.
// This seems more convenient.
if (operation == ' ') {
ResetInput();
}
NRF_LOG_INFO(". offset: %" PRId64, offset);
NRF_LOG_INFO(". value: %" PRId64, value);
NRF_LOG_INFO(". result: %" PRId64, result);
break;
}
UpdateValueLabel();
UpdateResultLabel();
}
void Calculator::UpdateOperation() const {
switch (operation) {
case '+':
lv_obj_set_style_local_bg_grad_dir(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, LV_GRAD_DIR_HOR);
lv_obj_set_style_local_bg_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::deepOrange);
lv_obj_set_style_local_bg_grad_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::bgAlt);
lv_btnmatrix_set_btn_ctrl(buttonMatrix, 7, LV_BTNMATRIX_CTRL_CHECK_STATE);
break;
case '-':
lv_obj_set_style_local_bg_grad_dir(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, LV_GRAD_DIR_HOR);
lv_obj_set_style_local_bg_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::bgAlt);
lv_obj_set_style_local_bg_grad_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::deepOrange);
lv_btnmatrix_set_btn_ctrl(buttonMatrix, 7, LV_BTNMATRIX_CTRL_CHECK_STATE);
break;
case '*':
lv_obj_set_style_local_bg_grad_dir(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, LV_GRAD_DIR_HOR);
lv_obj_set_style_local_bg_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::deepOrange);
lv_obj_set_style_local_bg_grad_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::bgAlt);
lv_btnmatrix_set_btn_ctrl(buttonMatrix, 11, LV_BTNMATRIX_CTRL_CHECK_STATE);
break;
case '/':
lv_obj_set_style_local_bg_grad_dir(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, LV_GRAD_DIR_HOR);
lv_obj_set_style_local_bg_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::bgAlt);
lv_obj_set_style_local_bg_grad_color(buttonMatrix, LV_BTNMATRIX_PART_BTN, LV_STATE_CHECKED, Colors::deepOrange);
lv_btnmatrix_set_btn_ctrl(buttonMatrix, 11, LV_BTNMATRIX_CTRL_CHECK_STATE);
break;
default:
lv_btnmatrix_clear_btn_ctrl_all(buttonMatrix, LV_BTNMATRIX_CTRL_CHECK_STATE);
break;
}
}
void Calculator::ResetInput() {
value = 0;
offset = FIXED_POINT_OFFSET;
operation = ' ';
equalSignPressed = false;
error = Error::None;
}
void Calculator::UpdateResultLabel() const {
int64_t integer = result / FIXED_POINT_OFFSET;
int64_t remainder = result % FIXED_POINT_OFFSET;
bool negative = (remainder < 0);
if (remainder == 0) {
lv_label_set_text_fmt(resultLabel, "%" PRId64, integer);
return;
}
if (remainder < 0) {
remainder = -remainder;
}
uint8_t min_width = N_DECIMALS;
// cut "0"-digits on the right
while ((remainder > 0) && (remainder % 10 == 0)) {
remainder /= 10;
min_width--;
}
if ((integer == 0) && negative) {
lv_label_set_text_fmt(resultLabel, "-0.%0*" PRId64, min_width, remainder);
} else {
lv_label_set_text_fmt(resultLabel, "%" PRId64 ".%0*" PRId64, integer, min_width, remainder);
}
}
void Calculator::UpdateValueLabel() {
switch (error) {
case Error::TooLarge:
lv_label_set_text_static(valueLabel, "too large");
break;
case Error::ZeroDivision:
lv_label_set_text_static(valueLabel, "zero division");
break;
case Error::None:
default: {
int64_t integer = value / FIXED_POINT_OFFSET;
int64_t remainder = value % FIXED_POINT_OFFSET;
bool negative = (remainder < 0);
int64_t printRemainder = remainder < 0 ? -remainder : remainder;
uint8_t min_width = 0;
int64_t tmp_offset = offset;
// TODO there has to be a simpler way to do this
if (tmp_offset == 0) {
tmp_offset = 1;
min_width = 1;
}
while (tmp_offset < FIXED_POINT_OFFSET) {
tmp_offset *= 10;
min_width++;
}
min_width--;
for (uint8_t i = min_width; i < N_DECIMALS; i++) {
printRemainder /= 10;
}
if ((integer == 0) && negative) {
lv_label_set_text_fmt(valueLabel, "-0.%0*" PRId64, min_width, printRemainder);
} else if (offset == FIXED_POINT_OFFSET) {
lv_label_set_text_fmt(valueLabel, "%" PRId64, integer);
} else if ((offset == (FIXED_POINT_OFFSET / 10)) && (remainder == 0)) {
lv_label_set_text_fmt(valueLabel, "%" PRId64 ".", integer);
} else {
lv_label_set_text_fmt(valueLabel, "%" PRId64 ".%0*" PRId64, integer, min_width, printRemainder);
}
} break;
}
}
// update the result based on value and operation
void Calculator::Eval() {
switch (operation) {
case ' ':
result = value;
break;
case '+':
// check for overflow
if (((result > 0) && (value > (MAX_VALUE - result))) || ((result < 0) && (value < (MIN_VALUE - result)))) {
error = Error::TooLarge;
break;
}
result += value;
break;
case '-':
// check for overflow
if (((result < 0) && (value > (MAX_VALUE + result))) || ((result > 0) && (value < (MIN_VALUE + result)))) {
error = Error::TooLarge;
break;
}
result -= value;
break;
case '*':
// check for overflow
// while dividing we eliminate the fixed point offset
// therefore we have to multiply it again for the comparison with value
// we also assume here that MAX_VALUE == -MIN_VALUE
if ((result != 0) && (std::abs(value) > (FIXED_POINT_OFFSET * (MAX_VALUE / std::abs(result))))) {
error = Error::TooLarge;
break;
}
result *= value;
// fixed point offset was multiplied too
result /= FIXED_POINT_OFFSET;
break;
case '/':
// check for zero division
if (value == 0) {
error = Error::ZeroDivision;
break;
}
// fixed point offset will be divided too
result *= FIXED_POINT_OFFSET;
result /= value;
break;
default:
break;
}
}

68
src/displayapp/screens/Calculator.h Normal file
View File

@ -0,0 +1,68 @@
#pragma once
#include "Screen.h"
namespace {
int64_t constexpr powi(int64_t base, uint8_t exponent) {
int64_t value = 1;
while (exponent) {
value *= base;
exponent--;
}
return value;
}
}
namespace Pinetime {
namespace Applications {
namespace Screens {
class Calculator : public Screen {
public:
~Calculator() override;
Calculator();
void OnButtonEvent(lv_obj_t* obj, lv_event_t event);
private:
lv_obj_t* buttonMatrix {};
lv_obj_t* valueLabel {};
lv_obj_t* resultLabel {};
void Eval();
void ResetInput();
void HandleInput();
void UpdateValueLabel();
void UpdateResultLabel() const;
void UpdateOperation() const;
// change this if you want to change the number of decimals
static constexpr uint8_t N_DECIMALS = 4;
// this is the constant default offset
static constexpr int64_t FIXED_POINT_OFFSET = powi(10, N_DECIMALS);
// this is the current offset, may wary after pressing '.'
int64_t offset = FIXED_POINT_OFFSET;
// the screen can show 12 chars
// but two are needed for '.' and '-'
static constexpr uint8_t MAX_DIGITS = 15;
static constexpr int64_t MAX_VALUE = powi(10, MAX_DIGITS) - 1;
// this is assumed in the multiplication overflow!
static constexpr int64_t MIN_VALUE = -MAX_VALUE;
int64_t value = 0;
int64_t result = 0;
char operation = ' ';
bool equalSignPressed = false;
enum Error {
TooLarge,
ZeroDivision,
None,
};
Error error = Error::None;
};
}
}
}

4
src/displayapp/screens/Symbols.h
View File

@ -39,6 +39,10 @@ namespace Pinetime {
static constexpr const char* eye = "\xEF\x81\xAE";
static constexpr const char* home = "\xEF\x80\x95";
static constexpr const char* sleep = "\xEE\xBD\x84";
static constexpr const char* calculator = "\xEF\x87\xAC";
static constexpr const char* backspace = "\xEF\x95\x9A";
// fontawesome_weathericons.c
// static constexpr const char* sun = "\xEF\x86\x85";