Timer now contains an invoker instead of inheriting

the idea is that an invoker holds a weak_ptr to a steppable. and
anything with an invoker can advance a steppable

app::add_sort has become too heavy because of the way timer and
invoker are initialized now.

src/Invoker.hpp

@@ -5,10 +5,9 @@
 #include <memory>
 class Invoker {
 public:
-  virtual ~Invoker() = default;
 	std::weak_ptr<Steppable> target;
 
-  void set_target(std::shared_ptr<Steppable> t) { target = t; }
+	Invoker(std::shared_ptr<Steppable> t) { target = t;}
 	void request() {
 		if (auto sp = target.lock()) {
 			sp->step();

src/core/app.cpp

@@ -39,13 +39,22 @@ shared_ptr<Steppable> make_sort(std::shared_ptr<SortInput> input, std::string so
 }
 
 //creates a Sortbinding, actually does too much
-void App::add_sort(shared_ptr<SortInput> myinput, string sorttype, Invoker &invoker) {
+void App::add_sort(shared_ptr<SortInput> myinput, string sorttype) {
 	cout << "adding sort " << sorttype << "\n";
+	//insert data
 	inputs.push_back(myinput);
+	//connect data with logic into a sort
 	std::shared_ptr<Steppable> mysorter = make_sort(myinput, sorttype);
 
+	//connect the sort with its invoker
+	unique_ptr<Invoker> myinvoker = make_unique<Invoker>(mysorter);
+
+	//move the sort into app
 	sortbindings.push_back(SortBinding{myinput, std::move(mysorter)});
-	invoker.set_target(sortbindings.back().sort);
+
+	//create the timer with the invoker and add it to app
+	Timer timer(0, std::move(myinvoker), chrono::milliseconds(250));
+	timermanager->add_timer(std::move(timer));
 }
 
 void App::run() {

src/core/app.hpp

@@ -22,7 +22,7 @@ struct App{
 
 	App(std::unique_ptr<ViewSession> myviewsession, std::unique_ptr<TimerManager> mytimermanager);
 
-	void add_sort(std::shared_ptr<SortInput> myinput, std::string sorttype, Invoker& invoker);
+	void add_sort(std::shared_ptr<SortInput> myinput, std::string sorttype);
 	void run();
 };
 

src/sorters.hpp

@@ -44,7 +44,6 @@ public:
 struct SortBinding {
 	std::shared_ptr<SortInput> input;
 	std::shared_ptr<Steppable> sort;
-
 	//SortBinding(std::shared_ptr<SortInput> input, std::unique_ptr<Steppable> sort, std::unique_ptr<Invoker> invoker);
 	
 };

src/sortui.cpp

@@ -35,9 +35,7 @@ int main() {
 	App myapp(std::move(myviewsession),std::move(mytimermanager));
 
 	//add and connect data
-	Timer timer(0, chrono::milliseconds(250));
+	myapp.add_sort(myinput, "bsort");
-	myapp.timermanager->timers.push_back(timer);
-	myapp.add_sort(myinput, "bsort", myapp.timermanager->timers.back());
 
 	//actually start the app
 	myapp.run();

src/timer.cpp

@@ -1,13 +1,16 @@
 #include <chrono>
 #include <iostream>
+#include <memory>
 
 #include "timer.hpp"
+#include "Invoker.hpp"
 
 using namespace std::chrono;
 using namespace std;
 
-Timer::Timer(size_t triggeramount, milliseconds triggerinterval)
+Timer::Timer(size_t triggeramount, std::unique_ptr<Invoker> invoker, milliseconds triggerinterval)
 	:triggeramount(triggeramount)
+	 , invoker(std::move(invoker))
 	 , triggerinterval(triggerinterval){}
 
 void Timer::add_time(milliseconds deltatime) {
@@ -15,7 +18,7 @@ void Timer::add_time(milliseconds deltatime) {
 	if (accumulator >= triggerinterval) {
 		accumulator -= triggerinterval;
 		cout << "request in timer\n";
-		request();
+		invoker->request();
 		triggercount++;
 		if (triggeramount != 0 && triggercount >= triggeramount){
 			isexpired=true;
@@ -24,7 +27,7 @@ void Timer::add_time(milliseconds deltatime) {
 }
 
 void TimerManager::add_timer(Timer timer){
-	timers.push_back(timer);
+	timers.push_back(std::move(timer));
 }
 
 void TimerManager::update_timers() {

src/timer.hpp

@@ -4,17 +4,19 @@
 #include <cstddef>
 #include <ctime>
 #include <chrono>
+#include <memory>
 #include <vector>
 
 #include "Invoker.hpp"
 //check if the timer is still valid, check if enough time has passed and if so, actuate action
-class Timer: public Invoker {
+class Timer {
 public:
 	size_t triggeramount;
 	bool isexpired = false;
 	size_t triggercount = 0;
+	std::unique_ptr<Invoker> invoker;
 
-	Timer(size_t triggeramount, std::chrono::milliseconds triggerinterval);
+	Timer(size_t triggeramount, std::unique_ptr<Invoker> invoker, std::chrono::milliseconds triggerinterval);
 	void add_time(std::chrono::milliseconds deltatime);
 
 private: