> > On 09/27/12 10:47, Eric Sokolowsky wrote: > > > I'm using FLTK 1.3.0 and have a list of widgets in a Fl_Pack. This > > > Fl_Pack is inside a Fl_Scroll. When I add a new item to the Fl_Pack I > > > want the item to be visible right away, scrolling if necessary. Is there > > > a way to do this easily, or do I have to figure out where the new item is > > > and if offscreen figure out how much to adjust the scrollbar. I tried > > > using the latter method but the screen does not update right after the > > > item is inserted until I move the cursor again, even if I put the code to > > > update the scrollbar position at the beginning of my Fl_Scroll's draw() > > > function. > > > > When you add the item to the pack, position the scroller, > > then call the parent window's redraw() method, eg. > > scroll->window()->redraw(); > > and see if that does it. > > >
After trying a few more things I found a recipe that seems to work, but it is a bit of a kludge. At the end of my class's draw() function (this is the class that derives from Fl_Scroll, and has a Fl_Pack as a member) I check to see if the window needs to scroll, and if it does, I recursively call the draw function just once. I think that the widget's position is not updated until sometime in the draw() code so perhaps I need to just find where that is done and put my scroll check right after that to see if I can avoid the recursive draw() call. _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
