Hi I have read a lot of threads talking about how to correctly position widgets inside an Fl_Scroll and no matter how much I try I just can't solve my problem:
I have an Fl_Scroll with a vertical Fl_Pack inside full of buttons groups and other widgets. The Fl_Scroll is cleared every once in a while and the contents get re-added dynamically. It works great except that if the scroll was scrolled down to a certain position before clearing it I would like it to be in the same position after the contents was re-added. The solution seemed quite straight forward: 1. Save the scroll position 2. Clear the Fl_Scroll 3. Recreate the contents of the scroll 4. call Fl_Scroll->position with saved values In code: /////////////////////////////////////////////////// int prevScrollY=bottomPaneScroll->yposition(); int prevScrollX=bottomPaneScroll->xposition(); bottomPaneScroll->clear() Fl_Pack *pliPacker = new Fl_Pack(bottomPaneScroll->x(), menuBar->h(), bottomPaneScroll->w()-30, 1) .. widgets are added... groups are ended etc... .. bottomPaneScroll->init_sizes(); Fl::check(); bottomPaneScroll->position(prevScrollX,prevScrollY); bottomPaneScroll->redraw(); ///////////////////////////////////////////////// However, this simply does not work, the scroll bar always resets to the top (with a strange size that is not correct until it is scrolled all the way down and all the way up again). I have attempted several things, like creating the Fl_Pack with it's 'y' constructor parameter set to the saved Y position, but that positions the pack shifted down... logic and the forums says that I should position the pack by substracting the saved Y position, so I create the pack like this: Fl_Pack *pliPacker = new Fl_Pack(bottomPaneScroll->x(), menuBar->h()-prevScrollY, bottomPaneScroll->w()-30, 1) This seems right, except that I think clipping is occurring and the pack is not drawn until I scroll all the way up again. The first method (calling the saved position after recreating the scroll) seemed like one way to go... The second method (building the Fl_Pack offset by the saved position) seemed like another way to go... Any ideas on how to fix this? Thankyou in advance Daniel Gollás
_______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
