gtk/src/drawable.hpp

   1 #ifndef __DRAWABLE_HPP__
   2 #define __DRAWABLE_HPP__
   3
   4 #include <glibmm.h>
   5 #include <sigc++/signal.h>
   6 #include <cairomm/context.h>
   7
   8 template <typename T>
   9 class Drawable
  10 {
  11 public:
  12         typedef sigc::signal<void, T> changed_signal_t;
  13
  14         Drawable(void) { }
  15         virtual ~Drawable(void) { }
  16         virtual changed_signal_t get_changed_signal(void) const;
  17         virtual void draw(Cairo::RefPtr<Cairo::Context> cr) = 0;
  18         virtual bool select(Cairo::RefPtr<Cairo::Context> cr, gdouble x, gdouble y) = 0;
  19         virtual void deselect(void) = 0;
  20 protected:
  21         virtual void _set_changed(void);
  22 private:
  23         changed_signal_t _changed_signal;
  24 };
  25
  26 template <typename T>
  27 inline typename Drawable<T>::changed_signal_t Drawable<T>::get_changed_signal(void) const
  28 {
  29         return _changed_signal;
  30 }
  31
  32 template <typename T>
  33 inline void Drawable<T>::_set_changed(void)
  34 {
  35         _changed_signal.emit((T)this);
  36 }
  37
  38 #endif