X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2FMoof%2FEngine.hh;h=07e982abd9ee4207478d077b8365cedc01897643;hp=0617b1a5c3094025331233fe4c8ced0a5742010e;hb=a295f8def17036c8071b56e181364f99a377cae7;hpb=57b78ebe21b1b48acd337daa5a1cb8c383959cfa

diff --git a/src/Moof/Engine.hh b/src/Moof/Engine.hh
index 0617b1a..07e982a 100644
--- a/src/Moof/Engine.hh
+++ b/src/Moof/Engine.hh
@@ -29,67 +29,76 @@
 #ifndef _MOOF_ENGINE_HH_
 #define _MOOF_ENGINE_HH_
 
-#include <stdexcept>
-
 #include <boost/shared_ptr.hpp>
 
-#include <Moof/Event.hh>
-#include <Moof/Exception.hh>
-#include <Moof/Math.hh>
+#include <Moof/Dispatch.hh>
+#include <Moof/Error.hh>
+#include <Moof/Video.hh>
+#include <Moof/Layer.hh>
 
 
 namespace Mf {
 
 
-// forward declaration
-class Video;
+/**
+ * The engine is essentially a stack of layers.  While running, it updates each
+ * layer from the bottom up every timestep.  It also draws each layer from the
+ * bottom up, adhering to the maximum frame-rate.  Events are sent to each layer
+ * from the top down until a layer signals the event was handled.  The engine is
+ * also responsible for firing timers on time.  The engine will continue running
+ * as long as there are layers on the stack.
+ */
 
 class Engine
 {
-protected:
+public:
 
-	Engine(int argc, char* argv[], const std::string& configFile,
-			const std::string& name, const std::string& iconFile);
+	Engine();
+	~Engine() {}
 
-public:
+	const Error& getError() const;
+
+	// setting the video is required before you can run the engine and should
+	// probably be done before adding any layers
+	void setVideo(VideoP video);
+	VideoP getVideo() const;
 
-	virtual ~Engine();
+	void setTimestep(int ts);
+	int getTimestep() const;
 
-	int run();
-	void stop(int exitCode = 0);
+	void setMaxFps(int maxFps);	// draw rate is always capped at the timestep
+	int getMaxFps() const;
 
-	void setTimestep(Scalar ts);
-	Scalar getTimestep();
-	void setMaxFrameRate(long maxFps);
-	long getMaxFrameRate();
+	int getFps() const;
 
-	Video& getVideo();
-	long getFrameRate();
+	void push(LayerP layer);	// push a layer onto the top
+	LayerP pop();				// pop the top layer
+	LayerP pop(Layer* layer);	// pops a specific layer and all layers above it
+	void clear();				// remove all layers (the engine will stop)
 
-	// override these if you want
-	virtual void update(Scalar t, Scalar dt);
-	virtual void draw(Scalar alpha);
-	virtual void handleEvent(const Event& event);
+	int getSize() const;		// get the size of the stack
 
-	struct Exception : public Mf::Exception
-	{
-		explicit Exception(unsigned error) :
-			Mf::Exception(error) {}
+	// set this machine in motion
+	void run();
 
-		void raise()
-		{
-			throw *this;
-		}
-	};
+	Dispatch::Handler addHandler(const std::string& event,
+			const Dispatch::Function& callback);
+	Dispatch::Handler addHandler(const std::string& event,
+			const Dispatch::Function& callback, Dispatch::Handler handler);
+
+	void dispatch(const std::string& event,
+			const Dispatch::Message* message = 0);
 
 private:
-	Engine() {} // this class must be subclassed to be useful
 
 	class Impl;
-	boost::shared_ptr<Impl> impl_;
+	boost::shared_ptr<Impl> mImpl;
 };
 
 
+extern Engine engine;
+
+
 } // namespace Mf
 
 #endif // _MOOF_ENGINE_HH_