Hi Richard, I am pretty sure you can use the FormattedRect of a chunk of text to accomplish this.
On Sat, Nov 27, 2010 at 11:23 AM, Richard Gaskin <ambassa...@fourthworld.com > wrote: > I need to know the vertical coordinates in pixels of the beginning and end > points for a chunk of text in a scrolling field. > > I'm currently using the selectedLoc on the first and last char of the text > run, locking the screen and messages while I get that. > > The problem is that I sometimes need to do this a thousand times in > succession before I can return control to the user, and this causes > significant delay. > > Because the text contains runs of variable height, I can't rely on line > counts multiplied by the number of lines to the character in question. > > And because the text may contain Unicode, I can't rely on the formattedText > for any of this either. > > And it seems that the formattedHeight works great for the full field, but > cannot be used on chunks (I hope I misunderstand that, but I couldn't get > any such syntax to work). > > And yes, the field resizes with the window, so I need to also recalculate > on resizeStack as well. > > > I briefly experimented with the mouseChunk, hoping that I could set and > then restore the screenMouseLoc as needed, and while it sometimes works it > really screws up the pointer interaction, no matter how cleverly I try to > hide the cursor during that brief moment; and worse, the mouseChunk only > returns a value when the mouse is actually over text, and sometimes blank > lines may be there instead. > > I'm hoping there's some magically fast way to get those measurements > without having to actually touch the field contents, which is apparently an > inherently slow action (relatively speaking). > > Anyone here know of such magic? > > -- > Richard Gaskin > Fourth World > LiveCode training and consulting: http://www.fourthworld.com > Webzine for LiveCode developers: > http://www.LiveCodeJournal.com<http://www.livecodejournal.com/> > LiveCode Journal blog: > http://LiveCodejournal.com/blog.irv<http://livecodejournal.com/blog.irv> > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > -- Do all things with love _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
