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