Highlighting the keywords in a text edit

[divya balachandran]

HI

Iam a beginner in QT-C++ programming..

Here i post this to know how to highlight the keywords in a texteditor..

->I want to highlight the keywords when i open a existing file

-> wnt to highlight the keywords while typing it itself

[arbi]

i think you should use QSyntaxHighlighter.

[patrik08]

HI

Iam a beginner in QT-C++ programming..

Here i post this to know how to highlight the keywords in a texteditor..

->I want to highlight the keywords when i open a existing file

-> wnt to highlight the keywords while typing it itself

search QScintilla on google or read code from http://www.qt-apps.org/content/show.php/JuffEd?content=59940 latest svn source ...

To draw all QTextLine an his corresponding qrect area is not easy and and Highlightsyntax is already finisch and stable by QScintilla ...

[fullmetalcoder]

Several solutions exist, each with advantages and drawbacks :


QSyntaxHighlihter (http://doc.trolltech.com/latest/qsyntaxhighlihter.html) : works directly with QTextEdit (http://doc.trolltech.com/latest/qtextedit.html) but requires that you write the highlighting code yourself
QScintilla (http://www.riverbankcomputing.co.uk/static/Docs/QScintilla2/index.html) : replaces QTextEdit/QTextDocument/... with its own classes. Provides highligting for various programming languages but will require a bit of coding if you want highlighting for anything else than the supported languages. Crappy API. No rich text (images, frames, ...)
QCodeEdit (http://qcodeedit.edyuk.org) : replaces QTextEdit and co. Much better API than QScintilla (at least a lot more Qt-like). Syntax highlighting can be done either programmatically or by writing a small XML file defining keywords and, if needed, contexts (i.e comments). No rich text.

hope this helps.