What is there involved in adding emoji support for a Qt application? Has anyone done it? Any lessons learnt? I see that shipping an emoji-calable font is part of a requirement, like Google Chrome does it on Windows - and adding a way to enter emoji characters is another, as native keyboards don't support them yet. This is only in the context of the desktop of a QWidgets application.

@Vadi2 i once have implemented this. This wasn't an easy task and took quite some time. @Vadi2 said in Emoji support : This does not work for me. I'm pasting 😃 into a QTextEdit - if I use the Emoji One font, it comes up black & white Using fonts for emoji will always result in b/w, since font's are basically nothing more than shapes rendered in a base color. You will never receive colored emoticons using fonts. Here are some implementation hints: i took the emoticons (16x16 PNGs) from Twitter - not all emoticon codes are covered unfortunately, but there are also other sources available for emoticons images i used QTextObjectInterface class i've overridden QTextEdit::createMimeDataFromSelection() to support copy of emoticons (convert custom text object back to unicode) to clipboard connect to QTextDocument::contentsChange() signal to get notified when a emoticon unicode gets pasted from clipboard scan the contexts of the QTextEdit/QTextDocument character by character and check if it's unicode is is an emoticon watch out for the UTF-8 and UTF-16 pitfall (!!!): use QChar::isHighSurrogate(), QChar::isLowSurrogate() and QChar::surrogateToUcs4() methods to convert between UTF-16/UTF-8 and check if a character is a emoticon unicode character keep in mind that some emoticons consist of up to 4 characters which combined result in a single emoticon I researched quite some time before i started implementing, and that was the only way to generically implement this in Qt i've found. (Talking about QtWidgets, not QML)

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Emoji support

Unsolved General and Desktop

21 Posts 6 Posters 15.7k Views

Pedro Vicente

replied to Pedro Vicente on

#21

@Pedro-Vicente But using that script, gives a link error

mocs_compilation_Debug.obj : error LNK2001: unresolved external symbol "public: static struct QMetaObject const QrwEmoticons::staticMetaObject"