Implement a grid view mode for List

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

diff --git a/source/list.h b/source/list.h
index 25001d18f7948dcab5af79e8671feddf538a61ae..1de05f6490b840b06193e9fa4f7ba133fb258dce 100644 (file)
--- a/source/list.h
+++ b/source/list.h
@@ -30,6 +30,12 @@ to allow scrolling through a long list.
 class List: virtual public Widget, private Container
 {
 public:
+       enum ViewMode
+       {
+               LIST,
+               GRID
+       };
+
        class Loader: public DataFile::DerivedObjectLoader<List, Widget::Loader>
        {
        public:
@@ -131,6 +137,14 @@ 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;
@@ -140,11 +154,14 @@ private:
        bool own_data;
        DataObserver *observer;
        ItemFactory *item_factory;
+       ViewMode view_mode;
        int sel_index;
        int focus_index;
-       unsigned first;
+       unsigned first_row;
        unsigned max_scroll;
-       unsigned view_size;
+       unsigned view_rows;
+       unsigned view_columns;
+       const Part *items_part;
        bool ignore_slider_change;
        bool dragging;
        int drag_start_x;
@@ -152,6 +169,7 @@ private:
 
        VSlider slider;
        std::vector<Item *> items;
+       std::vector<Row> rows;
 
 public:
        List();
@@ -185,7 +203,9 @@ private:
        Item *create_item(unsigned);
 
 public:
+       void set_view_mode(ViewMode);
        void set_view_size(unsigned);
+       void set_view_size(unsigned, unsigned);
        void set_view_all();
 
        void set_selected_index(int);
@@ -205,17 +225,23 @@ public:
        virtual void focus_in();
        virtual bool navigate(Navigation);
 private:
+       virtual void on_style_change();
+
        void move_focus(Navigation, bool);
        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);
        static void adjust_index(int &, int, int);
 };
 
+void operator>>(const LexicalConverter &, List::ViewMode &);
+
 } // namespace GLtk
 } // namespace Msp