Fully functioning screen code

This commit is contained in:
2024-04-01 16:49:44 +02:00
parent 2808e2e55f
commit 7b8f98cb3c
6 changed files with 269 additions and 0 deletions

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#include "displayText.h"
#include "Arduino.h"
//constructor
DisplayText::DisplayText(Adafruit_ST7796S_kbv& tftDisplay) : tft(tftDisplay) {
tft.setCursor(0,0);
tft.fillScreen(ST7796S_BLACK);
}
//display text public function
void DisplayText::writeText(char* text, int size, int posX, int posY, int screenTime, bool center, bool bottom) {
if (center) {
posX = centerText(text);
}
// if (bottom) {
// posY = bottomText(text);
// }
tft.setCursor(posX, posY);
tft.setTextSize(size);
printWordsFull(text, bottom);
delay(screenTime);
}
//to center the text when enabled in the public function
int DisplayText::centerText(char* text) {
int16_t x1, y1;
uint16_t w, h;
tft.getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
int x = (tft.width() - w) / 2;
return x;
}
// //to display the text at the bottom when enabled in the public function
// int DisplayText::bottomText(char* text) {
// int16_t x1, y1;
// uint16_t w, h;
// tft.getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
// int y = (tft.height() - h);
// return y;
// }
//attempt to write the text out in full (wip)
void DisplayText::printWordsFull(char* text, bool bottom) {
const int screenWidth = 480; // replace with your TFT display width
const int lineHeight = 30; // replace with your text line height
//the double copy is needed so it doesnt alter the original text
char* newtext1 = strdup(text); // Create a copy of the string for the first strtok_r
char* newtext2 = strdup(text); // Create a second copy for the second strtok_r
char* saveptr1, *saveptr2;
char* word = strtok_r(newtext1, " ", &saveptr1);
char line[100] = "";
int lineCount = 0;
int lineWidth = 0;
// Calculate total number of lines
int totalLines = 0;
char* tempWord = strtok_r(newtext2, " ", &saveptr2);
while (tempWord != NULL) {
int16_t x1, y1;
uint16_t w, h;
tft.getTextBounds(tempWord, 0, 0, &x1, &y1, &w, &h);
if (lineWidth + w > screenWidth && strlen(line) > 0) {
//if the line width is greater than the screen width, then we need to add a new line
totalLines++;
lineWidth = w;
//otherwise we just add the width of the word to the line width
} else {
lineWidth += w;
}
tempWord = strtok_r(NULL, " ", &saveptr2);
}
totalLines++; // Add one for the last line
// Reset variables for actual printing
strcpy(line, "");
lineWidth = 0;
while (word != NULL) {
int16_t x1, y1;
uint16_t w, h;
tft.getTextBounds(word, 0, 0, &x1, &y1, &w, &h);
if (lineWidth + w > screenWidth && strlen(line) > 0) {
int y = bottom ? tft.height() - lineHeight * (totalLines - lineCount) : lineHeight * lineCount;
tft.setCursor(0, y);
tft.println(line);
lineCount++;
strcpy(line, word);
strcat(line, " ");
lineWidth = w;
} else {
strcat(line, word);
strcat(line, " ");
lineWidth += w;
}
word = strtok_r(NULL, " ", &saveptr1);
}
// print the last line
int y = bottom ? tft.height() - lineHeight * (totalLines - lineCount) : lineHeight * lineCount;
tft.setCursor(0, y);
tft.println(line);
free(newtext1); // Free the memory allocated by strdup
free(newtext2); // Free the memory allocated by strdup
}