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Help => Graphics => Topic started by: Mr.Goose on August 03, 2023, 05:00:53 pm

Title: National letters - input text on screen
Post by: Mr.Goose on August 03, 2023, 05:00:53 pm

Hi everyone!

I have one issue, where I need your help with. I made field, where you can write name of your character, when you making it. Everything looks fine, but I can't figure out how can I input my national (polish) letters in (ę, ó, ą, ś, ł, ż, ź, ć, ń).

Here is my code:

(click to show/hide)

void Character_creation::event_character_creation_insert_name(RenderWindow* window, Event* ev, string& name_input_string, bool &char_creation_insert_name_status)
{
   if (char_creation_insert_name_status == 1)
   {
      if (ev->type == Event::TextEntered)
      {
         if (ev->text.unicode == '\b' && name_input_string.size() != 0)
         {
            name_input_string.erase(name_input_string.size() - 1, 1);
            char_creation_name_input_txt.move(+8, 0);
            char_creation_name_input_txt.setString(name_input_string);
         }
         else if (((ev->text.unicode > 64) && (ev->text.unicode < 91)) || ((ev->text.unicode > 96) && (ev->text.unicode < 123)))
         {
            if (ev->text.unicode != '\b' && name_input_string.size() < 16)
            {
               name_input_string += ev->text.unicode;
               char_creation_name_input_txt.move(-8, 0);
               char_creation_name_input_txt.setString(name_input_string);
            }
         }

      }
   }
}

I tried everything, for ex. I tried to implement unicode numbers to this "else if", but only two letters works ("Ó, ó"). Another letters are replaced by another.

Can you help me with that issue?

Title: Re: National letters - input text on screen
Post by: fallahn on August 03, 2023, 07:12:05 pm

Assuming name_input_string is a std::string (hard to tell without a namespace) try:

Code: [Select]

char_creation_name_input_txt.setString(sf::String::fromUtf8(name_input_string.begin(), name_input_string.end());


Title: Re: National letters - input text on screen
Post by: Mr.Goose on August 03, 2023, 08:20:13 pm

Unfortunetly, that doesn't work. Characters still doesn't show up or are replaced by other characters, when I delete that "else if".

I tried to change advanced save settings in Visual Studio 2022 from Middleeuropean (codepage 1250) to UTF-8, but that doesn't works too.

Yes, name_input_string is exacly string.

Title: Re: National letters - input text on screen
Post by: Hapax on August 03, 2023, 10:18:38 pm

I have to ask but are the characters you are hoping to see within the range you allow?

unicode 65-90 and 97-122.

Title: Re: National letters - input text on screen
Post by: Mr.Goose on August 05, 2023, 10:09:26 am

Yes, after fallahn suggestions I deleted that "else if" with unicode range. Unfortunetly when I do this, my national letters are replaced by other letters, for ex. "ń" is replaced by "D".

EDIT:
Additional info! When I just draw texts on screen, I just write letter "L" before string. For ex.:

(click to show/hide)

text.setString(L"Zażółć gąślą jaźń");

This letter "L" works, but when I want to write text directly on screen, that doesn't works.

Title: Re: National letters - input text on screen
Post by: Hapax on August 06, 2023, 09:45:02 pm

Ah, have you tried using a wide string? i.e. std::w_string

There are 'better' string types for unicode characters but, apparently, SFML doesn't support them yet.

https://www.sfml-dev.org/tutorials/2.6/graphics-text.php#how-to-avoid-problems-with-non-ascii-characters

Title: Re: National letters - input text on screen
Post by: kimci86 on August 06, 2023, 10:26:53 pm

If name_input_string is an std::string and you do:

Code: [Select]

name_input_string += ev->text.unicode;then the 4-bytes unicode character will be narrowed down to only one byte and lose information.
For example "ń" (unicode character U+0144) becomes "D" (unicode character U+0044). Only the least significant byte is added to the string.

You can use sf::String instead of std::string to store unicode characters.
Alternatively you could encode unicode characters to UTF-8 encoding to store them in an std::string.

Title: Re: National letters - input text on screen
Post by: Mr.Goose on August 08, 2023, 09:27:31 am

And that finally works!

I just change string to String, as you said.

Thank you kimci86 and everyone else for help!