Cache the items part in List

[libs/gltk.git] / source / list.cpp

diff --git a/source/list.cpp b/source/list.cpp
index 9be88e52c9ce65acecdf98b550d78a5db9a672ee..5d765008765c9ccbece8c28e77c9a62da5a4cecb 100644 (file)
--- a/source/list.cpp
+++ b/source/list.cpp
@@ -44,6 +44,7 @@ void List::init()
        first = 0;
        max_scroll = 0;
        view_size = 5;
+       items_part = 0;
        ignore_slider_change = false;
        dragging = false;
        drag_start_x = 0;
@@ -349,6 +350,11 @@ bool List::navigate(Navigation nav)
        return true;
 }
 
+void List::on_style_change()
+{
+       items_part = (style ? style->get_part("items") : 0);
+}
+
 void List::move_focus(Navigation nav, bool select)
 {
        if(nav==NAV_UP)
@@ -386,15 +392,11 @@ void List::item_autosize_changed(Item *item)
 
 unsigned List::last_to_first(unsigned last) const
 {
-       if(!style)
+       if(!items_part)
                return last;
 
-       unsigned view_h = geom.h;
-       if(const Part *items_part = style->get_part("items"))
-       {
-               const Sides &margin = items_part->get_margin();
-               view_h -= margin.top+margin.bottom;
-       }
+       const Sides &margin = items_part->get_margin();
+       unsigned view_h = geom.h-min(geom.h, margin.top+margin.bottom);
 
        unsigned items_h = 0;
        for(unsigned i=last; i<items.size(); --i)