Make the DISABLED state actually do something

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

diff --git a/source/widget.h b/source/widget.h
index 47bc41096de58db1b43ada855d63875c83103ea1..6cb3d0654362f60142e4d083561291879713a7c8 100644 (file)
--- a/source/widget.h
+++ b/source/widget.h
@@ -2,48 +2,146 @@
 #define MSP_GLTK_WIDGET_H_
 
 #include <string>
+#include <msp/datafile/objectloader.h>
+#include <msp/gl/renderer.h>
 #include "geometry.h"
+#include "partcache.h"
 #include "state.h"
 
 namespace Msp {
 namespace GLtk {
 
+class Container;
 class Part;
 class Resources;
 class Style;
 
+/**
+Base class for all widgets.  Derived classes should call update_style in 
+constructor, because it can't be done correctly in the Widget constructor.
+*/
 class Widget
 {
+       friend class Container;
+
+public:
+       class Loader: public DataFile::ObjectLoader<Widget>
+       {
+       public:
+               Loader(Widget &);
+       private:
+               void position(int, int);
+               void size(unsigned, unsigned);
+               void style(const std::string &);
+       };
+
+       sigc::signal<void, bool> signal_visibility_changed;
+       sigc::signal<void> signal_autosize_changed;
+       sigc::signal<void> signal_request_focus;
+       sigc::signal<void> signal_grab_pointer;
+       sigc::signal<void> signal_ungrab_pointer;
+
+protected:
+       Geometry geom;
+       std::string style_name;
+       const Style *style;
+       State state;
+       bool visible;
+       bool focusable;
+       Container *parent;
+       std::string tooltip;
+       PartCache part_cache;
+
+       Widget();
 public:
-       virtual ~Widget() { }
+       virtual ~Widget();
+
+       /// Returns the name of the widget class.  Used for style lookup.
+       virtual const char *get_class() const { return "widget"; }
+
        void set_position(int, int);
        void set_size(unsigned, unsigned);
+       void autosize();
+protected:
+       virtual void autosize_special(const Part &, Geometry &) { }
+public:
        void set_geometry(const Geometry &);
-       void set_style(const std::string &);
        const Geometry &get_geometry() const { return geom; }
-       void render() const;
+
+       void map_coords_to_ancestor(int &, int &, const Widget &) const;
+
+protected:
+       /** Sets the widget's parent Container.  The widget must be unparented when
+       calling this function with a non-null parameter. */
+       void set_parent(Container *);
+public:
+       Container *get_parent() const { return parent; }
+
+       /** Finds the closest ancestor of a specific type. */
+       template<typename T>
+       T *find_ancestor() const
+       {
+               for(Widget *w=parent; w; w=w->get_parent())
+                       if(T *tw = dynamic_cast<T *>(w))
+                               return tw;
+               return 0;
+       }
+
+       /** Sets the widget style.  The name of the resource to be looked up is
+       constructed by concatenating the widget class and the style name with a
+       dash. */
+       void set_style(const std::string &);
+       const Style &get_style() const { return *style; }
+
+protected:
+       /** Gets a style object from the resource collection based on the class and
+       style names of the widget. */
+       void update_style();
+
+public:
+       void set_tooltip(const std::string &);
+       const std::string &get_tooltip() const { return tooltip; }
+
+       void set_visible(bool);
+       bool is_visible() const { return visible; }
+       void set_focusable(bool);
+       bool is_focusable() const { return focusable; }
+       void set_focus();
+       void set_enabled(bool);
+       bool is_enabled() const { return !(state&DISABLED); }
+
+protected:
+       void set_state(State s) { set_state(s, s); }
+       void clear_state(State s) { set_state(s, NORMAL); }
+       void set_state(State, State);
+public:
+       State get_state() const { return state; }
+
+protected:
+       void rebuild();
+       virtual void rebuild_special(const Part &);
+
+public:
+       void render(GL::Renderer &) const;
+protected:
+       virtual void render_special(const Part &, GL::Renderer &) const { }
+
+public:
+       // Events
        virtual void button_press(int, int, unsigned) { }
        virtual void button_release(int, int, unsigned) { }
        virtual void pointer_motion(int, int) { }
-       virtual void pointer_enter() { }
-       virtual void pointer_leave() { }
-       virtual void key_press(unsigned, unsigned, wchar_t) { }
+       virtual void pointer_enter();
+       virtual void pointer_leave();
+       virtual void key_press(unsigned, unsigned) { }
        virtual void key_release(unsigned, unsigned) { }
-       virtual void focus_in() { }
-       virtual void focus_out() { }
+       virtual void character(wchar_t) { }
+       virtual void focus_in();
+       virtual void focus_out();
 protected:
-       const Resources &res;
-       Geometry geom;
-       std::string style_name;
-       const Style *style;
-       State state;
-
-       Widget(const Resources &);
-       virtual const char *get_class() const { return "widget"; }
-       void update_style();
-       virtual void render_part(const Part &) const;
-       void render_graphic(const Part &) const;
-       void render_text(const Part &, const std::string &) const;
+       virtual void on_geometry_change() { }
+       virtual void on_style_change() { }
+       virtual void on_reparent() { }
 };
 
 } // namespace GLtk