source/list.h

   1 #ifndef MSP_GLTK_LIST_H_
   2 #define MSP_GLTK_LIST_H_
   3
   4 #include <sigc++/signal.h>
   5 #include "container.h"
   6 #include "label.h"
   7 #include "listdata.h"
   8 #include "vslider.h"
   9
  10 namespace Msp {
  11 namespace GLtk {
  12
  13 /**
  14 Shows a list of items, allowing the user to select one.  A slider is included
  15 to allow scrolling through a long list.
  16 */
  17 class List: virtual public Widget, private Container
  18 {
  19 public:
  20         class Loader: public DataFile::DerivedObjectLoader<List, Widget::Loader>
  21         {
  22         public:
  23                 Loader(List &);
  24         private:
  25                 void item(const std::string &);
  26         };
  27
  28 private:
  29         /// This exists to make disconnecting signals easier
  30         class DataObserver: public sigc::trackable
  31         {
  32         private:
  33                 List &list;
  34
  35         public:
  36                 DataObserver(List &);
  37
  38                 void item_added(unsigned);
  39                 void item_removed(unsigned);
  40                 void cleared();
  41                 void refresh_item(unsigned);
  42         };
  43
  44 protected:
  45         class Item: public Container
  46         {
  47         public:
  48                 virtual const char *get_class() const { return "listitem"; }
  49
  50         protected:
  51                 virtual void autosize_special(const Part &, Geometry &);
  52         public:
  53                 void set_active(bool);
  54
  55                 virtual void render_special(const Part &, GL::Renderer &) const;
  56         };
  57
  58 public:
  59         class BasicItem: public Item
  60         {
  61         private:
  62                 Label label;
  63
  64         public:
  65                 BasicItem(const std::string &);
  66
  67         private:
  68                 virtual void on_style_change();
  69         };
  70
  71 public:
  72         sigc::signal<void, unsigned> signal_item_selected;
  73
  74 private:
  75         ListData *data;
  76         bool own_data;
  77         DataObserver *observer;
  78         int sel_index;
  79         unsigned first;
  80         unsigned max_scroll;
  81         unsigned view_size;
  82
  83         VSlider slider;
  84         std::vector<Item *> items;
  85
  86 public:
  87         List();
  88         List(ListData &);
  89 private:
  90         void init();
  91 public:
  92         virtual ~List();
  93
  94         virtual const char *get_class() const { return "list"; }
  95
  96 private:
  97         virtual void autosize_special(const Part &, Geometry &);
  98
  99 public:
 100         void set_data(ListData &);
 101         ListData &get_data() { return *data; }
 102         const ListData &get_data() const { return *data; }
 103 private:
 104         void items_changed();
 105 protected:
 106         virtual Item *create_item(unsigned);
 107
 108 public:
 109         void set_view_size(unsigned);
 110         void set_view_all();
 111
 112         void set_selected_index(int);
 113         int get_selected_index() const { return sel_index; }
 114
 115 private:
 116         virtual void render_special(const Part &, GL::Renderer &) const;
 117
 118 public:
 119         virtual void button_press(int, int, unsigned);
 120 private:
 121         virtual void on_geometry_change();
 122         virtual void on_style_change();
 123
 124         void reposition_slider();
 125         void reposition_items();
 126         void check_view_range();
 127         void slider_value_changed(double);
 128 };
 129
 130 } // namespace GLtk
 131 } // namespace Msp
 132
 133 #endif