Hi I haven't been able to find a way of how to surround a range of text with a border, but I guess GtkTextView doesn't support it - it is a hard to define feature anyway. Well, my question is, how would you go about to implement such a feature in GtkTextView? Does Pango support such a thing? Can you give me some hints, please? I am willing to look into it and implement it (if at all possible) - if this is not a desired feature of GtkTextView (or GtkSourceView for that matter) I can still implement the feature in a foreign struct. Also I am interested in how TextView layouts its text. Does it draw all the text into a big enough widget and lets the scroll container do all the work? How does it know into which line a part of text should be drawn? Does the TextBuffer store text in a collection of 'lines'? Where does the 'styling' of text happen? Where is the info of GtkTextTags processed and applied/drawn? Well, I've been looking at GtkTextView's source (for a few minutes) and I can say, without error, that I learned nothing :D Well, I've found a lot of GtkTextLayout references (but I have not found GtkTextLayout's source) - I suppose this one does the actual drawing of text, does it? Also, I haven't seen the part of code that would handle the GtkTextTags info (looking at gtktextview.c). I would like to know the above because I'm interested in how difficult the algorithms for discovering mouse button clicks on a range of text are. Also, I'm interested how would one implement something like what is depicted in the attached image (note the borders and the hidden text which is still in the TextBuffer but is not drawn...)? Is it hard to detect mouse clicks on a range of text (e.g.: in the example it would have the effect of unfolding the folded code)? We expect to need this in MonoDevelop, and of course, there are other features I would like TextView to have, but I think if I get to know the internals of TextView just a little more, I could perhaps find out all the answers on my own - eventually.... Thanks in advance! Regards, --- Matej
Attachment:
borders.png
Description: PNG image
