if(i>=static_cast<int>(data->size()))
throw out_of_range("List::set_selected_index");
- if(i==sel_index)
+ if(i==sel_index || (i<0 && sel_index<0))
return;
if(sel_index>=0)
items[sel_index]->set_active(false);
if(i<0)
+ {
sel_index = -1;
+ signal_selection_cleared.emit();
+ }
else
{
sel_index = i;
void List::button_press(int x, int y, unsigned btn)
{
- Container::button_press(x, y, btn);
- if(click_focus && btn==1)
+ if(btn==4 || btn==5)
{
- for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
- if(click_focus==items[i])
- {
- set_selected_index(i);
- break;
- }
+ unsigned change = 3;
+ if(btn==4)
+ {
+ change = min(first, change);
+ slider.set_value(max_scroll-(first-change));
+ }
+ else if(btn==5)
+ {
+ change = min(max_scroll-first, change);
+ slider.set_value(max_scroll-(first+change));
+ }
+ }
+ else
+ {
+ Container::button_press(x, y, btn);
+ if(click_focus && btn==1)
+ {
+ for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
+ if(click_focus==items[i])
+ {
+ set_selected_index(i);
+ break;
+ }
+ }
}
}
rebuild();
}
-void List::check_view_range()
+unsigned List::last_to_first(unsigned last) const
{
if(!style)
- return;
+ return last;
- unsigned h = geom.h;
+ unsigned view_h = geom.h;
if(const Part *items_part = style->get_part("items"))
{
const Sides &margin = items_part->get_margin();
- h -= margin.top+margin.bottom;
+ view_h -= margin.top+margin.bottom;
}
- max_scroll = items.size();
- for(unsigned i=items.size(); i-->0; )
+ unsigned items_h = 0;
+ for(unsigned i=last; i<items.size(); --i)
{
- unsigned ih = items[i]->get_geometry().h;
- if(ih<=h)
- {
- h -= ih;
- --max_scroll;
- }
+ items_h += items[i]->get_geometry().h;
+ if(items_h>view_h)
+ return min(i+1, last);
}
+ return 0;
+}
+
+void List::check_view_range()
+{
+ if(!style)
+ return;
+
+ if(items.empty())
+ max_scroll = 0;
+ else
+ max_scroll = last_to_first(items.size()-1);
+
if(first>max_scroll)
first = max_scroll;
void List::DataObserver::item_removed(unsigned i)
{
+ bool had_selection = (list.sel_index>=0);
if(list.sel_index>static_cast<int>(i))
--list.sel_index;
else if(list.sel_index==static_cast<int>(i))
delete list.items[i];
list.items.erase(list.items.begin()+i);
list.items_changed();
+
+ if(had_selection && list.sel_index<0)
+ list.signal_selection_cleared.emit();
}
void List::DataObserver::cleared()
delete *i;
list.items.clear();
list.items_changed();
+
+ list.signal_selection_cleared.emit();
}
void List::DataObserver::refresh_item(unsigned i)