On 27/08/2014 18:17, Graham Samuel wrote: > Having forgotten all I ever knew about Unicode (it wasn't much), I am trying > to understand Unicode in LC, and although I have heard about "just works" I > am not sure how to proceed. For example, the code for pi (Greek letter, lower > case) is apparently (via internet sources) > > U+03C0 > > it also seems to be encoded as 960, but that's in HTML. 0x3C0 (hexadecimal) is 960 (decimal). For some reason, Unicode codepoints (their name for a character) are normally given in hex.
> Suppose I want to display pi in a field, "glyphPi". What does the script look > like? I've tried: The approach depends on whether you are using 6.x or 7.0. In 7.0, you can enter the pi symbol directly in the script editor or you can insert it using numToCodepoint: -- Note that you set text, not unicodeText in 7 set the text of field "fld" to numToCodepoint(0x3C0) In 6.x, you'd have to do something like the following: -- Will not work on PowerPC! set the unicodeText of field "fld" to numToChar(0xC0) & numToChar(0x03) The bytes are in "little-endian" order so the least-significant byte comes first. Unless you are using a PowerPC machine (in which the bytes come in the opposite order). In short, if you want to use Unicode, 7.0 makes it far, far easier. At least, I think so, but having worked on it for the past year, I might be a little biased ;) > oddly enough, all these appear to be legal, and all produce glyphs (some look > like Kanji), but none of them are the symbol pi. Is this just a syntactical > problem, or have I misunderstood the whole process? The unicodeText of a field expects 16-bit quantities (rather than bytes/characters) for each character and isn't smart enough to know that's not what you're giving it. It interprets each pair of characters in the string as these 16-bit quantities and ends up displaying random characters (and, because the vast majority of characters in Unicode by quantity are East Asian ideographic characters, you'll usually get something resembling Chinese). > And when I do get it right, can I copy this field to the clipboard and paste > it into another field which will then be visible to a user in the same form? > Early experiments suggest I can't, but it could just be the usual finger > trouble. In 7.0, Unicode should copy and paste just fine. I can't say for sure in 6.x - I haven't actually tried it! Regards, Fraser _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
