M5. Lcd.textWidth does not center text exactly in the middle



  • I want to write a text centered in the middle. the text has a variable size. with M5. Lcd.textWidth, the text is not centered exactly in the middle (deviation about 5px). I doing something wrong? How can I center the text in height?

    void loop() {
    M5.Lcd.fillScreen(BLACK); //set the default background color
    M5.Lcd.fillRoundRect(20, 50, 280, 140, 15, RED);
    M5.Lcd.fillRoundRect(30, 60, 260, 120, 15, BLACK);
    M5.Lcd.setTextSize(5);
    M5.Lcd.setTextColor(RED);
    for (int i=-1500; i <= 2255; i++){
    String text = String(i);
    M5.Lcd.fillRoundRect(30, 60, 260, 120, 15, BLACK);
    M5.Lcd.drawString(text, (int)((M5.Lcd.width()/2)-(M5.Lcd.textWidth(text)/2)), (int)(M5.Lcd.height()/2), 2);
    delay(20);
    }
    }



  • Hello@Stoni99

    1. Use the setTextDatum and drawString instructions.
      M5.Lcd.setTextDatum(3);
      M5.Lcd.drawString(text, (int)((M5.Lcd.width()/2)-(M5.Lcd.textWidth(text)/2)-15),(int)(M5.Lcd.height()/2-0), 2);

    :

    1. Use the drawCentreString instruction.
      // M5.Lcd.setTextSize(5);
      // M5.Lcd.drawString(text, (int)((M5.Lcd.width()/2)-(M5.Lcd.textWidth(text)/2)), (int)(M5.Lcd.height()/2), 2);

    M5.Lcd.drawCentreString(text, M5.Lcd.width()/2, M5.Lcd.height()/2-40 , 8);



  • OK - thank you!
    The height is therefore adjusted by hand.

    Other question:
    I can't append the "W" to the string. It is not displayed. Is there another possibility?

    for (int i=-1500; i <= 2255; i++){
    String text = String(i)+"W";
    M5.Lcd.fillRoundRect(30, 60, 260, 120, 15, BLACK);
    M5.Lcd.drawCentreString(text, M5.Lcd.width()/2, M5.Lcd.height()/2-30 , 7); //Text auf x zentrieren (x,y,Schriftgrƶsse)
    //M5.Lcd.drawString(text, (int)((M5.Lcd.width()/2)-(M5.Lcd.textWidth(text)/2)-15), (int)((M5.Lcd.height()/2)-40), 2);
    delay(1000);
    }



  • Hello@Stoni99

    m5-docsļ¼šLCD
    setTextDatum(), drawString(), drawCentreString()
    https://github.com/m5stack/m5-docs/blob/master/docs/en/api/lcd.md

    :

    A. Use the drawCentreString instruction.
    The height is therefore adjusted by hand.
    drawCentreString : fontname=2

    M5.Lcd.setTextSize(5);
    M5.Lcd.drawCentreString(text, M5.Lcd.width()/2, M5.Lcd.height()/2 -42 , 2);
    or
    M5.Lcd.setTextSize(4);
    M5.Lcd.drawCentreString(text, M5.Lcd.width()/2, M5.Lcd.height()/2 -34 , 2);

    :

    B. setTextDatum + drawString + Free_Fonts
    Free_Fonts.h : Beautiful font.
    https://github.com/m5stack/M5Stack/blob/master/examples/Advanced/Display/Free_Font_Demo/Free_Fonts.h

    #include <Free_Fonts.h>

    void setup(){
    M5.Lcd.setFreeFont(FMB24); // or FM24

    void loop(){
    M5.Lcd.setTextSize(1);
    M5.Lcd.setTextDatum(3);
    M5.Lcd.drawString(text, M5.Lcd.width()/2-M5.Lcd.textWidth(text)/2, M5.Lcd.height()/2 -3,1);



  • šŸ‘Thank you!