X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fview.h;h=acd5a65cfec98a1753642dfcb75c4393e879ed31;hb=3b159edbe4e80a2bc19c4c2fcd42cb996b9fbfe0;hp=0dd638959693f6c052494892a09a723b273a95a5;hpb=1bd2a77b4999d240a27e13a9069e8fca3410d363;p=libs%2Fgl.git

diff --git a/source/view.h b/source/view.h
index 0dd63895..acd5a65c 100644
--- a/source/view.h
+++ b/source/view.h
@@ -2,6 +2,7 @@
 #define MSP_GL_VIEW_H_
 
 #include <list>
+#include <sigc++/trackable.h>
 #include <msp/graphics/glcontext.h>
 #include <msp/graphics/window.h>
 
@@ -15,7 +16,7 @@ class Renderable;
 /**
 Manages the presentation of rendering results on the screen.
 */
-class View
+class View: public sigc::trackable
 {
 private:
 	Graphics::Window &window;
@@ -31,6 +32,7 @@ public:
 	Graphics::GLContext &get_context() { return context; }
 	unsigned get_width() const { return window.get_width(); }
 	unsigned get_height() const { return window.get_height(); }
+	float get_aspect() const { return static_cast<float>(get_width())/get_height(); }
 
 	void set_content(const Renderable *);
 	void synchronize_camera_aspect(Camera &);