[QScintilla] Trying to set different color for different set of keywords in QsciLexerCPP

[Phil Thompson]

On Mon, 8 Nov 2010 22:20:39 +0100, "Jonas O." <ezjonas at gmail.com> wrote:
> I subclassed QsciLexerCPP with the QsciLexerCO class, I added the
> required other functions and other stuff.

Something that may be confusing you...

The QsciLexer classes aren't lexers themselves - they manage the
configuration of the underlying Scintilla lexers. You can't change the
functionality of a lexer - like getting it to support more keyword sets.
You can only configure a lexer - like redefining the contents of a keyword
set.

> Here is the enum:
> enum
> {
> 	BaseType = 20,
> 	Instruct = 21,
> 	Modifiers = 22,
> 	ClassRelated = 23,
> 	Oper = 24,
> 	Misc = 25
> };

The enum describes the different styles that the underlying Scintilla
lexer implements. If you want to add more styles you have to modify the
underlying lexer.

> //Here is the keywords function:
> 
> const char *QsciLexerCO :: keywords(int set) const
> {
> 	switch (set)
> 	{
> 		case BaseType:
> 			return
> 			"bool char double enum float int long "
> 			"short struct union void wchar_t";
> 
> 		case ClassRelated:
> 			return
> 			"class inline friend private protected public "
> 			"template this virtual";
> 
> 		case Misc:
> 			return
> 			"asm namespace typedef using";
> 
> 		case Modifiers:
> 			"auto const explicit extern mutable register "
> 			"signed static unsigned volatile";
> 
> 		case Instruct:
> 			return
> 			"break case continue default do else "
> 			"for goto if return switch while";
> 	}
> 
> 	return 0;
> 
> }

The Scintilla C++ lexer supports keyword sets 1, 2, 3 and 5. (Note that
there is a bug in the documentation for QsciLexerCPP.GlobalClass which
wrongly refers to set 4 rather than set 5.) These are rendered according to
the styles Keyword, Keyword2, CommentDocKeyword and GlobalClass
respectively.

There isn't a lot you can do with the CommentDocKeyword because it is only
recognised within comments. You can use the other three sets in any way you
want. If you want more than three then you have to modify the underlying
Scintilla lexer.

Phil