Now I saw that you've created new functions to position a tree_item and
using then to automatic scroll the tree with keyboard navigation:
case FL_Up: // next item up
case FL_Down: { // next item down
set_item_focus(next_visible_item(_item_focus, ekey)); // next
item
up|dn
if ( _item_focus ) { // item
in focus?
if ( _prefs.selectmode() == FL_TREE_SELECT_MULTI && //
multiselect on?
(Fl::event_state() & FL_SHIFT) && //
shift key?
! _item_focus->is_selected() ) { // not
already selected?
select(_item_focus); //
extend selection..
}
//code bellow allow automatic scrolling with keyboard
switch (ekey) {
case FL_Up:
if(_item_focus->y() < y()) show_top(_item_focus);
break;
case FL_Down:
if((_item_focus->y()+_item_focus->h()) > (y()+h()))
show_bottom(_item_focus);
break;
}
//code end automatic scrolling
return(1);
}
break;
}
En 12/08/2010 10:22:58, Domingo Alvarez Duarte <[email protected]>
escribió:
> It seems that for some reason you didn't saw or like my sugestion that
> allows automatic scroll of the the tree when navigating with keyboard:
>
> case FL_Up: // next item up
> case FL_Down: { // next item down
> set_item_focus(next_visible_item(_item_focus, ekey)); // next
> item
> up|dn
> if ( _item_focus ) { // item
> in focus?
> if ( _prefs.selectmode() == FL_TREE_SELECT_MULTI && //
> multiselect on?
> (Fl::event_state() & FL_SHIFT) && //
> shift key?
> ! _item_focus->is_selected() ) { // not
> already selected?
> select(_item_focus); //
> extend selection..
> }
> //code bellow allow automatic scrolling with keyboard
> switch (ekey) {
> case FL_Up:
> if(_item_focus->y() < y())
> vscroll->value(vscroll->value()-_item_focus->h());
> break;
> case FL_Down:
> if((_item_focus->y()+_item_focus->h()) > (y()+h()))
> vscroll->value(vscroll->value()+_item_focus->h());
> break;
> }
> //code end automatic scrolling
> return(1);
> }
> break;
> }
>
>
>
> En 12/08/2010 03:32:31, Greg Ercolano <[email protected]> escribió:
>
>> Another updated Fl_Tree patch against a clean r7680; more features.
>> http://seriss.com/people/erco/fltk/tmp/Fl_Tree-add-keyboard-nav-to-r7680-08-11-10--5pm.patch
>>
>> * Added Domingo's recommended Fl_Tree_Item accessors x() / y() /
>> w() / h()
>>
>> * Added Fl_Tree::show_item(), show_top(), show_middle(),
>> show_bottom().
>> This lets one procedurally scroll the display to make the
>> specified item visible
>> at particular positions on the display. (for Mayank Malik)
>>
>> * Added Fl_Tree::first_selected_item() and
>> Fl_Tree::next_selected_item().
>> With this you can loop through just the selected items.
>>
>> * tree demo modified to include top/mid/bot buttons that test the
>> above.
>> To use this, select an item in the display, and hit Top/Mid/Bot
>> buttons
>> to position that item in the display. Scrollbar must be able to
>> move to
>> show the item, so it's best to have e.g. the "500 Items" tree
>> open, and
>> select an item that is somewhere lower in the list.
>>
>> * vscroll widget is public, so caller can directly manipulate the
>> scrollbar.
>> (Using Fl_Browser as a model here.. not sure if this is a bad
>> idea or not.
>> This might be backed out)
>>
>> TODO:
>> o autoscroll during selection/focus navigation
>>
>> o Need a callback system that is invoked when items are
>> open/closed
>>
>> o Need to allow keyboard nav to move focus to child
>> FLTK widgets
>
>
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