void List::init()
{
+ input_type = INPUT_NAVIGATION;
+
item_factory = 0;
sel_index = -1;
+ focus_index = -1;
first = 0;
max_scroll = 0;
view_size = 5;
if(i<0)
{
sel_index = -1;
+ focus_index = -1;
+ set_input_focus(0);
signal_selection_cleared.emit();
}
else
{
sel_index = i;
+ focus_index = i;
items[sel_index]->set_active(true);
+ set_input_focus(items[focus_index]);
signal_item_selected.emit(sel_index);
}
}
}
}
+void List::focus_in()
+{
+ if(focus_index<0)
+ focus_index = sel_index;
+
+ if(focus_index>=0)
+ {
+ scroll_to_focus();
+ set_input_focus(items[focus_index]);
+ }
+}
+
+bool List::navigate(Navigation nav)
+{
+ if(nav==NAV_UP)
+ {
+ if(focus_index<0 && !items.empty())
+ focus_index = items.size()-1;
+ else if(focus_index>0)
+ --focus_index;
+ else
+ return false;
+
+ scroll_to_focus();
+ set_input_focus(items[focus_index]);
+ }
+ else if(nav==NAV_DOWN)
+ {
+ if(focus_index<0 && !items.empty())
+ focus_index = 0;
+ else if(static_cast<unsigned>(focus_index+1)<items.size())
+ ++focus_index;
+ else
+ return false;
+
+ scroll_to_focus();
+ set_input_focus(items[focus_index]);
+ }
+ else if(nav==NAV_ACTIVATE)
+ set_selected_index(focus_index);
+ else
+ return false;
+
+ return true;
+}
+
void List::item_autosize_changed(Item *item)
{
item->autosize();
slider.set_value(max_scroll-first);
}
+void List::scroll_to_focus()
+{
+ if(focus_index<0 || items[focus_index]->is_visible())
+ return;
+
+ if(static_cast<unsigned>(focus_index)<first)
+ slider.set_value(max_scroll-focus_index);
+ else
+ slider.set_value(max_scroll-last_to_first(focus_index));
+}
+
void List::slider_value_changed(double value)
{
if(max_scroll>0 && !ignore_slider_change)
}
}
+void List::adjust_index(int &index, int pos, int change)
+{
+ if(index>pos)
+ index += change;
+ else if(index==pos)
+ index = (change>0 ? index+change : -1);
+}
+
List::DataObserver::DataObserver(List &l):
list(l)
void List::DataObserver::item_added(unsigned i)
{
- if(list.sel_index>=static_cast<int>(i))
- ++list.sel_index;
+ adjust_index(list.sel_index, i, 1);
+ adjust_index(list.focus_index, i, 1);
Item *item = list.create_item(i);
list.items.insert(list.items.begin()+i, item);
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))
- list.sel_index = -1;
+ adjust_index(list.sel_index, i, -1);
+ adjust_index(list.focus_index, i, -1);
delete list.items[i];
list.items.erase(list.items.begin()+i);
void List::DataObserver::cleared()
{
list.sel_index = -1;
+ list.focus_index = -1;
for(vector<Item *>::iterator i=list.items.begin(); i!=list.items.end(); ++i)
delete *i;
list.items.clear();