Efficient coloring for "log window"

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   Hi,
I'm just about to code a log window where a new line is appended once every second or so. Also, the user should be able to enter commands with an auto-completion dropdown list. Something like a terminal where inplace-editing is not allowed, but text can be appended.
Here, syntax coloring would be a great benefit. However, I am going to use advanced coloring rules (mainly using regex). For this reason, I only want to colorize the last line when it is being changed. The other lines have already been colored, so I do not want colorize them again. Imagine a log window with 1000+ lines and advanced regex rules for colorization...

Is this possible with your syntax edit control?

Thanks!
/Chris, Sweden

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znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Topic: Efficient coloring for "log window" Posted: 15 March 2007 at 5:22am
	Hi, I'm just about to code a log window where a new line is appended once every second or so. Also, the user should be able to enter commands with an auto-completion dropdown list. Something like a terminal where inplace-editing is not allowed, but text can be appended. Here, syntax coloring would be a great benefit. However, I am going to use advanced coloring rules (mainly using regex). For this reason, I only want to colorize the last line when it is being changed. The other lines have already been colored, so I do not want colorize them again. Imagine a log window with 1000+ lines and advanced regex rules for colorization... Is this possible with your syntax edit control? Thanks! /Chris, Sweden

sserge Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 01 December 2004 Status: Offline Points: 1297	Post Options Post Reply Quote sserge Report Post Thanks(0) Quote Reply Posted: 22 March 2007 at 6:35pm
	Hi Chris, Yes, I suppose that Syntax Edit control will suite your needs. Firstly, it parses all new information in the background which allows users to continue working with text. Second, it stores parsed information for the beginning of the text. And if you only append the text, it will be parsed efficiently. The only problem could be defining a color schema. Control's schemas are based on some tricky logic not directly connected with regex expressions. However, there are a number of examples (open schemas of some formats) and you can always pick some ideas from there. -- WBR, Serge

znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Posted: 24 March 2007 at 5:16pm
	If that is the case, I believe your edit control lacks a must-have feature. Whenever a line/char is about to be colorized, a message should be sent to the window. If it is not handled, then you invoke the scripted colorizer. The colorization mechanism should not be dependent on files with obscure syntax. Take a look at Scintilla!