Strange behaviour when using display.getTextBounds

[crazynightgriffin]

Hi When using

If the text is over 10 characters it does not centre. code a simple example.

`#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Wire.h>
#include <Fonts/FreeSans9pt7b.h>
#include <Fonts/FreeSans12pt7b.h>
#include <Fonts/FreeSerif12pt7b.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {

Serial.begin(9600);
// put your setup code here, to run once:
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.display();
delay(2000);
}

void loop() {
// put your main code here, to run repeatedly:

display.setTextSize(1);
display.clearDisplay();
display.setTextColor(WHITE);
drawCentreText("aaaaaaaaaaa", 70, 20);   //writes 2nd row of text
display.display();
delay(5000);

}
// this is a helper loop and centers the text
void drawCentreText(const char *buf, int x, int y)
{
int16_t x1;
int16_t y1;
uint16_t w;
uint16_t h;
display.getTextBounds(buf, x, y, &x1, &y1, &w, &h); //calc width of new string
display.setCursor(x - w / 2, y);
display.print(buf);
}`

[electroman00]

[OLED Display Module 12864]
https://www.amazon.com/gp/product/B0837DLWVH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

drawCentreText("1234567890123456789012",62 ,32 ); //Center on Display

will center 123456789012345678901

// 21 Characters w/setTextSize(1)
// 10 Characters w/setTextSize(2)
// 7 Characters w/setTextSize(3)
// 5 Characters w/setTextSize(4)

display.getTextBounds(buf, 0, y, &x1, &y1, &w, &h); //calc width of new string

hth