Jump to start of document when setting dynamic Syntax Language

For your workaround you can use SuspendPainting to disable the refresh while the editor jumps. Just call SupsendPainting before you assign the language and ResumePainting after you have restored the first visible line index.

Thanks Tobias, that worked.

Hi Robert,

I'm loading up our SDI Editor demo and as long as on the File menu I turn off loading example text, I can switch between languages and nothing changes in the view.  One thing that is probably more efficient in general for what you listed would be to do your IsUpdating block before you set the document language.  That will reduce the number of updates that filter up to the SyntaxEditor and might solve the problem along the way.

I just tried the SDI Editor demo, and can reproduce the problem there also. After starting the editor, make sure its sufficiently small that the editor window cannot contain all the text, and scroll to the bottom of the window. Then change the language to C++.

I think I see what's causing it now.  When we had tried, we page downed the caret to the end and it was fine when doing that.  If you scroll (without moving the caret), then that's where you see this.  It's due to a ScrollToCaret call that gets invoked as the document gets a full reparse call.  So what you are doing combined with what Tobias and I said is best to prevent the flicker and maximize performance.

I've done both and its ok now, but I do think its a bug that you should fix sometime.

Thanks