Found the following interesting discussion in the Newsgroups:
| Rich Text Box SelectionColor by a_poster | |
| I'm making a real-time spell checker that mimics MS Word's real-time spell checking behavior. As the user types into a rich text box, I detect when a word has been misspelled and modify the visual appearance of the word in some way (currently I just turn it red). So, using a rich text box, I have to : a) bookmark my current .selectionStart into some integer b) set .selectionStart to the beginning of the misspelled word c) set .selectionLength to the end of the misspelled word d) set .selectionColor = [red] e) set .selectionStart = bookmarked position I admit this works - the code's fairly efficient and the PC is fast, so I can accomplish all this faster than anyone can realistically type and the user has no idea their selection is running wild all over the textbox every time they leave a word behind. But I had initially envisioned (not knowing anything about the rich textbox control) a more elegant system of simply pointing to a substring in the text and changing it's color, or font or style or whatever, instantly, and without moving the cursor. Was that a naive dream or is this possible to do without so much modification to the selection? | |
| Reply: by:Sriram Krishnan | |
| Your method is the right one (to the best of my knowledge). But you are right - a more elegant method is necessary. What you say is close to the way Word does it. It puts properties in property bags and every chunk of text refers a property bag. So to change the formatting of some text, you just assign it to some other property bag. Read Chris Pratley's and Rick Schaut's blog for more details http://blogs.msdn.com/Chris_Pratley http://blogs.msdn.com/Rick_Schaut -- Sriram Krishnan | |
Posted by Xander Zelders
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