Add a persistent view size attribute to List

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

diff --git a/source/list.h b/source/list.h
index a13de52db627468bca5da9d9fd0c35c7996f13ef..dd44f3b57738e9bd2dbf19cfc87592d0d9bf6b67 100644 (file)
--- a/source/list.h
+++ b/source/list.h
@@ -1,29 +1,23 @@
-/* $Id$
-
-This file is part of libmspgltk
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GLTK_LIST_H_
 #define MSP_GLTK_LIST_H_
 
 #include <sigc++/signal.h>
-#include "widget.h"
+#include "container.h"
+#include "label.h"
+#include "listdata.h"
+#include "vslider.h"
 
 namespace Msp {
 namespace GLtk {
 
-class VSlider;
-
 /**
 Shows a list of items, allowing the user to select one.  A slider is included
 to allow scrolling through a long list.
 */
-class List: public Widget
+class List: virtual public Widget, private Container
 {
 public:
-       class Loader: public Widget::Loader
+       class Loader: public DataFile::DerivedObjectLoader<List, Widget::Loader>
        {
        public:
                Loader(List &);
@@ -32,43 +26,100 @@ public:
        };
 
 private:
-       std::vector<std::string> items;
+       /// This exists to make disconnecting signals easier
+       class DataObserver: public sigc::trackable
+       {
+       private:
+               List &list;
+
+       public:
+               DataObserver(List &);
+
+               void item_added(unsigned);
+               void item_removed(unsigned);
+               void cleared();
+               void refresh_strings();
+       };
+
+protected:
+       class Item: public Container
+       {
+       public:
+               virtual const char *get_class() const { return "listitem"; }
+
+               virtual void autosize();
+               void set_active(bool);
+
+               virtual void render_special(const Part &, GL::Renderer &) const;
+       };
+
+public:
+       class BasicItem: public Item
+       {
+       private:
+               Label label;
+
+       public:
+               BasicItem(const std::string &);
+
+       private:
+               virtual void on_style_change();
+       };
+
+public:
+       sigc::signal<void, unsigned> signal_item_selected;
+
+private:
+       ListData *data;
+       bool own_data;
+       DataObserver *observer;
        int sel_index;
        unsigned first;
-       unsigned n_visible;
-
-       const Part *items_part;
+       unsigned max_scroll;
+       unsigned view_size;
 
-       VSlider *slider;
-       bool slider_active;
+       VSlider slider;
+       std::vector<Item *> items;
 
 public:
-       sigc::signal<void, unsigned, const std::string &> signal_item_selected;
+       List();
+       List(ListData &);
+private:
+       void init();
+public:
+       virtual ~List();
+
+       virtual const char *get_class() const { return "list"; }
+
+       virtual void autosize();
 
-       List(const Resources &);
-       ~List();
+       void set_data(ListData &);
+       ListData &get_data() { return *data; }
+       const ListData &get_data() const { return *data; }
+private:
+       void items_changed();
+protected:
+       virtual Item *create_item(unsigned);
 
-       void append(const std::string &);
-       void insert(unsigned, const std::string &);
-       void remove(unsigned);
-       void clear();
+public:
+       void set_view_size(unsigned);
+       void set_view_all();
 
        void set_selected_index(int);
-       const std::string &get_selected() const;
        int get_selected_index() const { return sel_index; }
 
-       virtual void button_press(int, int, unsigned);
-       virtual void button_release(int, int, unsigned);
-       virtual void pointer_motion(int, int);
-
 private:
-       virtual const char *get_class() const { return "list"; }
-       virtual void render_special(const Part &) const;
+       virtual void render_special(const Part &, GL::Renderer &) const;
 
+public:
+       virtual void button_press(int, int, unsigned);
+private:
        virtual void on_geometry_change();
        virtual void on_style_change();
+
        void reposition_slider();
-       void recalculate_parameters();
+       void reposition_items();
+       void check_view_range();
        void slider_value_changed(double);
 };