EchoLot/Display.cpp

/*
 * Display.cpp
 *
 *  Created on: 05.01.2026
 *      Author: FSmilari
 */

#include "Display.h"
#include "Adafruit_ST7735.h"
#include "images/SFToolsLogo.h"
#include "fonts/titillium_web_regular16pt7b.h"  // Add a custom font
#include "fonts/titillium_web_regular10pt7b.h"  // Add a custom font
#include "fonts/titillium_web_semibold10pt7b.h"  // Add a custom font
#include "fonts/titillium_web_regular8pt7b.h"  // Add a custom font
#include "fonts/titillium_web_semibold8pt7b.h"  // Add a custom font
#include <Fonts/FreeSans9pt7b.h>  // Add a custom font
#include "images/stm32duino_logo.h"
#include "images/thermometer_32.h"
#include "images/gear.h"
#include "images/zzz.h"
#include "images/ruler.h"
#include "images/air.h"
#include "images/water.h"
#include "images/water_s.h"

//#define LED -1		// to +5v
//#define SCK  PA5
//#define SDA  PA7
//#define MISO -1
//#define MOSI SDA
#define CS   PA2
#define DC 	 PA1
#define RST  PA0

#define ST7735_ARDUINOGREEN 0x04b3
#define ST7735_STM32BLUE 0x03d6
#define ST7735_DODGERBLUE 0x249f

/*****************
 ** Constructors.
 ****************/
Display::Display() : tft(Adafruit_ST7735(CS, DC, RST)) { // @suppress("Abstract class cannot be instantiated")
	starttime = 0;
	configValue = 0.0;
	configUnit = "m/s";
	distance = 0;
	environment = 1;
	waterTemp = 20.0;
	airTemp = 20.0;
	refreshScreen = true;
	doMeasureAnimation = false;
}

void Display::init(void) {
	tft.initR(INITR_BLACKTAB);
	tft.fillScreen(ST7735_BLACK);
	tft.setRotation(1);
	tft.setTextWrap(false);
	tft.setTextColor(ST7735_WHITE);
	refreshScreen = true;
}

void Display::setRefreshScreen() {
	refreshScreen = true;
}

void Display::drawXCenteredText(String txt, const GFXfont *font, uint8_t size, uint16_t col, int16_t y) {
	int16_t x1, y1; // Top-left corner of text
	uint16_t w, h;  // Width and height

	tft.setFont(font);
	tft.setTextSize(size);  // Set text size. Goes from 0 (the smallest) to 20 (very big)
	tft.setTextColor(col);

	// Get bounds starting from (0, 0)
	tft.getTextBounds(txt, 0, 0, &x1, &y1, &w, &h);

	// Calculate centered position
	int16_t centered_x = (SCREEN_WIDTH - w) / 2 - 3;

	// Set cursor and print
	tft.setCursor(centered_x, y);
	tft.print(txt);
}

void Display::drawRightAlignedText(String txt, const GFXfont *font, uint8_t size, uint16_t col, int16_t xOffset, int16_t y) {
	int16_t x1, y1; // Top-left corner of text
	uint16_t w, h;  // Width and height

	tft.setFont(font);
	tft.setTextSize(size);  // Set text size. Goes from 0 (the smallest) to 20 (very big)
	tft.setTextColor(col);

	// Get bounds starting from (0, 0)
	tft.getTextBounds(txt, 0, 0, &x1, &y1, &w, &h);

	// Calculate position
	int16_t rightAligned_x = (SCREEN_WIDTH - xOffset) - w;

	// Set cursor and print
	tft.setCursor(rightAligned_x, y);
	tft.print(txt);
}

void Display::drawText(String txt, const GFXfont *font, uint8_t size, uint16_t col, int16_t x, int16_t y) {
	tft.setFont(font);
	tft.setTextSize(size);  // Set text size. Goes from 0 (the smallest) to 20 (very big)
	tft.setTextColor(col);

	tft.setCursor(x, y);
	tft.print(txt);
}

void Display::drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color) {
	tft.drawCircle(x0, y0, r, color);
}

void Display::clearDisplay(void) {
	tft.fillScreen(ST7735_BLACK);
}

void Display::showBrand(int16_t x, int16_t y) {
	drawBitmap(x, y, 128, 34, SFTools_Logo, ST7735_ORANGE);
}

void Display::showInitialization(void) {
	redrawFrame();
	drawXCenteredText("EchoLoT", &titillium_web_regular16pt7b, 1, ST7735_CYAN, 36);
	drawXCenteredText("designed by", &FreeSans9pt7b, 1, ST7735_WHITE, 64);
	showBrand(16, 84);
	delay(500);

	redrawFrame();
	drawText("powered by", &FreeSans9pt7b, 1, ST7735_CYAN, 35, 30);
	tft.fillRoundRect(46, 42, 68, 68, 7, ST7735_STM32BLUE);
	drawBitmap(48, 44, 64, 64, epd_bitmap_stm32duino_logo_icon, ST7735_WHITE);

//	tft.drawBitmap(5, 100, epd_bitmap_gear, 24, 24, ST7735_YELLOW);
//	tft.drawBitmap(40, 100, epd_bitmap_Zzz_24, 24, 24, ST7735_CYAN);
//	tft.drawBitmap(75, 100, epd_bitmap_Measure_25, 25, 25, ST7735_RED);
//	tft.fillTriangle(75, 98, 80, 102, 75, 107, ST7735_RED);
//	tft.fillTriangle(82, 98, 87, 102, 82, 107, ST7735_RED);
//	tft.fillTriangle(89, 98, 94, 102, 89, 107, ST7735_RED);
//	tft.fillTriangle(96, 98, 101, 102, 96, 107, ST7735_RED);
//
//	tft.drawBitmap(110, 100, epd_bitmap_air, 24, 24, ST7735_CYAN);
//	tft.drawBitmap(110, 100, epd_bitmap_water, 24, 24, ST7735_BLUE);
//	tft.drawBitmap(110, 100, epd_bitmap_water_s, 24, 24, ST7735_BLUE);
//	tft.drawBitmap(1, 160 - 32, thermometer_icon_32, 32, 32, 0xE71C);

	delay(500);
}

void Display::display(void) {
	if (!refreshScreen) {
		return;
	}

	refreshScreen = false;
}

void Display::showFrame(Status status) {
	switch (status) {
		case Status::INITIALIZATION:
			redrawFrame();
			break;
		case Status::IDLE:
			if (refreshScreen) {
				redrawIdleStatus();
				refreshScreen = false;
			}
			break;
		case Status::CONFIGURATION:
			if (refreshScreen) {
				redrawConfigStatus();
				refreshScreen = false;
			}
			break;
		default:
			break;
	}
}

void Display::setStatusValues(float airTemp, float waterTemp) {
	this->airTemp = airTemp;
	this->waterTemp = waterTemp;
}

void Display::setEnvironment(int environment) {
	if (this->environment != environment) {
		this->environment = environment;
		redrawEnvIcon();
	}
}

void Display::setDistance(uint32_t distance) {
	if (this->distance != distance) {
		this->distance = distance;
		redrawDistance();
	}
}

/* ===== Private methods ===== */
void Display::drawBitmap(int x, int y, int w, int h, const uint8_t bitmap[], uint16_t col) {
	tft.drawBitmap(x, y, bitmap, w, h, col);
}

void Display::drawRGBBitmap(int x, int y, int w, int h, const uint16_t bitmap[]) {
	tft.drawRGBBitmap(x, y, bitmap, w, h);
}

void Display::redrawFrame() {
	clearDisplay();
	tft.drawRoundRect(0, 0, 160, 128, 9, ST7735_CYAN);
	tft.drawRoundRect(1, 1, 158, 126, 8, ST7735_CYAN);
}

void Display::redrawGrid() {
	redrawFrame();
	tft.drawLine(0, 31, 160, 31, ST7735_CYAN);
	tft.drawLine(0, 32, 160, 32, ST7735_CYAN);
	tft.drawLine(0, 89, 160, 89, ST7735_CYAN);
	tft.drawLine(0, 90, 160, 90, ST7735_CYAN);
	tft.drawLine(80, 90, 80, 128, ST7735_CYAN);
	tft.drawLine(81, 90, 81, 128, ST7735_CYAN);
}

void Display::redrawIdleStatus() {
	redrawGrid();
	tft.drawBitmap(25, 4, epd_bitmap_Zzz_24, 24, 24, ST7735_CYAN);
	drawText("OPERATIV", &titillium_web_semibold8pt7b, 1, ST7735_WHITE, 55, 21);

	float temp = environment == 1 ? airTemp : waterTemp;
	uint16_t col = temp <= 17.0 ? ST7735_WHITE : temp <= 24.0 ? ST7735_GREEN : ST7735_ORANGE;
	uint16_t thH = temp <= 17.0 ? 0 : temp <= 24.0 ? 5 : 9;
	tft.drawBitmap(0, 92, thermometer_icon_32, 32, 32, col);
	tft.drawRect(15, 107 - thH, 2, thH, col);
	drawText(String(temp, 1), &titillium_web_semibold8pt7b, 1, col, 35, 114);
	drawCircle(72, 102, 2, col);

	redrawEnvIcon();
	redrawDistance();
}

void Display::redrawConfigStatus() {
	redrawGrid();
	tft.drawBitmap(35, 4, epd_bitmap_gear, 24, 24, ST7735_YELLOW);
	drawText("KONFIG.", &titillium_web_semibold8pt7b, 1, ST7735_WHITE, 65, 21);
}

void Display::redrawEnvIcon() {
	const uint8_t *environmentIcon = environment == 1 ? epd_bitmap_air : environment == 2 ? epd_bitmap_water : epd_bitmap_water_s;
	uint16_t col = environment == 1 ? ST7735_WHITE : ST7735_DODGERBLUE;
	tft.fillRect(83, 92, 72, 33, ST7735_BLACK);
	tft.drawBitmap(108, 97, environmentIcon, 24, 24, col);
}

void Display::runMeasureAnimation(bool run) {
	if (!this->doMeasureAnimation && run) {
		this->starttime = millis();
		this->doMeasureAnimation = run;
	} else if (this->doMeasureAnimation && !run) {
		this->starttime = 0;
		this->doMeasureAnimation = run;
	}
	tft.fillRect(24, 3, 28, 28, ST7735_BLACK);
	if (this->doMeasureAnimation && starttime != 0) {
		uint8_t lvl = ((millis() - starttime) / 1000) % 4;
		tft.drawBitmap(25, 4, epd_bitmap_Measure_25, 25, 25, ST7735_RED);
		switch (lvl) {
			case 0:
				tft.fillTriangle(25, 4, 30, 9, 25, 13, ST7735_RED);
				tft.fillTriangle(32, 4, 37, 9, 32, 13, ST7735_BLACK);
				tft.fillTriangle(39, 4, 44, 9, 39, 13, ST7735_BLACK);
				tft.fillTriangle(46, 4, 51, 9, 46, 13, ST7735_BLACK);
				break;
			case 1:
				tft.fillTriangle(25, 4, 30, 9, 25, 13, ST7735_BLACK);
				tft.fillTriangle(32, 4, 37, 9, 32, 13, ST7735_RED);
				tft.fillTriangle(39, 4, 44, 9, 39, 13, ST7735_BLACK);
				tft.fillTriangle(46, 4, 51, 9, 46, 13, ST7735_BLACK);
				break;
			case 2:
				tft.fillTriangle(25, 4, 30, 9, 25, 13, ST7735_BLACK);
				tft.fillTriangle(32, 4, 37, 9, 32, 13, ST7735_BLACK);
				tft.fillTriangle(39, 4, 44, 9, 39, 13, ST7735_RED);
				tft.fillTriangle(46, 4, 51, 9, 46, 13, ST7735_BLACK);
				break;
			case 3:
				tft.fillTriangle(25, 4, 30, 9, 25, 13, ST7735_BLACK);
				tft.fillTriangle(32, 4, 37, 9, 32, 13, ST7735_BLACK);
				tft.fillTriangle(39, 4, 44, 9, 39, 13, ST7735_BLACK);
				tft.fillTriangle(46, 4, 51, 9, 46, 13, ST7735_RED);
				break;
			default:
				break;
		}
	} else {
		tft.drawBitmap(25, 4, epd_bitmap_Zzz_24, 24, 24, ST7735_CYAN);
	}
}

void Display::redrawDistance() {
	tft.fillRect(4, 34, 152, 56, ST7735_BLACK);
	if (distance == 0) {
		drawXCenteredText("- - -", &titillium_web_regular16pt7b, 1, ST7735_CYAN, 69);
	} else {
		if (environment == 1) {
			uint16_t dist_CM = distance / 10;
			drawXCenteredText(String(dist_CM) + " cm", &titillium_web_regular16pt7b, 1, ST7735_CYAN, 69);
		} else {
			float dist_M = float(distance) / 1000;
			drawXCenteredText(String(dist_M, 1) + " m", &titillium_web_regular16pt7b, 1, ST7735_CYAN, 69);
		}
	}
}