Add a level of indirection to decouple list rows from items

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

diff --git a/source/list.h b/source/list.h
index 43a24576a1ecf1904d29d1a58eb104c61a790d00..ef4311e0702c73b818a19ab3abaadb07e1427abb 100644 (file)
--- a/source/list.h
+++ b/source/list.h
@@ -131,6 +131,14 @@ private:
                }
        };
 
+       struct Row
+       {
+               unsigned first;
+               unsigned height;
+
+               Row(unsigned f): first(f), height(0) { }
+       };
+
 public:
        sigc::signal<void, unsigned> signal_item_selected;
        sigc::signal<void> signal_selection_cleared;
@@ -142,9 +150,9 @@ private:
        ItemFactory *item_factory;
        int sel_index;
        int focus_index;
-       unsigned first;
+       unsigned first_row;
        unsigned max_scroll;
-       unsigned view_size;
+       unsigned view_rows;
        const Part *items_part;
        bool ignore_slider_change;
        bool dragging;
@@ -153,6 +161,7 @@ private:
 
        VSlider slider;
        std::vector<Item *> items;
+       std::vector<Row> rows;
 
 public:
        List();
@@ -212,7 +221,9 @@ private:
        void set_focus_index(int);
 
        void item_autosize_changed(Item *);
-       unsigned last_to_first(unsigned) const;
+       void reposition_items(bool);
+       unsigned last_to_first_row(unsigned) const;
+       unsigned item_index_to_row(unsigned) const;
        void check_view_range();
        void scroll_to_focus();
        void slider_value_changed(double);