Re: How do you get the begin/end interators for viewable area of TextView in ScrollableWindow?

[Phil Wolff <adiabat centurylink net>]

Have a look at the Gtk::TextView::scroll_to ( ... ) functions.


On 01/23/2017 06:28 AM, Bill William wrote:
> I was trying to implement a Search bar for Gtk::TextView inside of 
> Gtk::ScrollableWindow.  Basically the code uses a text iterator to 
> search forward in the code for a given text string.  Example:
>
>
> void TextEditor::SearchClicked(int direction) {
>   static Glib::ustring lastsearch {""};
>   static Gtk::TextIter it = textbuff->begin();
>
>   Glib::ustring searchtext = searchbar.entry.get_text();
>   if (lastsearch != searchtext) {
>     it = textbuff->begin();
>   }
>   lastsearch = searchtext;
>
>   cout << "clicked! " << direction << "\n";
>
>   Gtk::TextIter it_match_begin;
>   Gtk::TextIter it_match_end;
>
>   bool found = false;
>   if (!direction) {
>     found = it.forward_search(searchtext,
> Gtk::TextSearchFlags::TEXT_SEARCH_CASE_INSENSITIVE,
>                     it_match_begin,
>                     it_match_end);
>   }
>   else {
>     found = it.backward_search(searchtext,
> Gtk::TextSearchFlags::TEXT_SEARCH_CASE_INSENSITIVE,
>                     it_match_begin,
>                     it_match_end);
>   }
>   if (found) {
>     textbuff->select_range(it_match_begin, it_match_end);
>     if (!direction) {
>       it = it_match_end;
>     } else {
>       it = it_match_begin;
>     }
>   }
> }
>
>
> Which works ok, except when the iterator goes beyond the current 
> scroller positions in the ScrolledWindow,  then you need to manually 
> scroll the window down to see the highlighted text.  Any ideas on how 
> to fix this code so that it autoscrolls when it goes beyond the 
> scrolledwindows visable area?
>
>
>
>
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