how to split text to different row with different fonts?

[mat-sche]

Hi, I'm newbie in programming and english langwitch using .... my german is bedder :)

I am using this great graphics library but I have a problem or not have a great idea how to print text in one step with more text characters than possible aspect ratio. Furthermore have i this also with different fonts
My Display have 64x128 digits.
Example:

  u8g2.setFont(u8g2_font_8x13B_mf);
  u8g2.setCursor(2, 10);
  u8g2.print("Found fingerprint sensorxxxxxxxxxxxxxxxxx!");
  u8g2.sendBuffer();

In this case the sign xxxxx is not printing on display.....
What can I do?

MAT

[olikraus]

Maybe the string is too long for your display. Remember: there is no automatic line break

[mat-sche]

Maybe the string is too long for your display

Thats right and I know this.

Remember: there is no automatic line break

That be would be great.....
How do I calculate the max. characters per line in relation to the font used?

[olikraus]

You can pass a (sub) string and calculate the expected size: https://github.com/olikraus/u8g2/wiki/u8g2reference#getutf8width
Another option would be to draw one char after the other and check whether the max x position is reached.

In the following example we will use the return value of https://github.com/olikraus/u8g2/wiki/u8g2reference#drawglyph to advance the x position:

  u8g2_uint_t x = 0; // start position
  u8g2_uint_t y = 20;
  ...
  char *s = "Hello Very Long String";
  while( *s != '\0' ) {
    while( *s != '\0' && x < u8g2.getDisplayWidth() )
       x += u8g2.drawGylph(x, y, *s++ )
    x = 0; y += 10;  // next line
  }

[mat-sche]

Many thanks for your replay, all information I can find in the reference! Perfect but a lot of information for me, for me as newbee :)! I try to understand that all ;)