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#include <iostream>
using namespace std;
#include "../FbTk/Signal.hh"
#include "../FbTk/MemFun.hh"
#include "../FbTk/RelaySignal.hh"
#include "../FbTk/Observer.hh"
#include "../FbTk/Subject.hh"
#include <string>
struct NoArgument {
void operator() () const {
cout << "No Argument." << endl;
}
};
struct OneArgument {
void operator ()( int value ) {
cout << "One argument = " << value << endl;
}
};
struct TwoArguments {
template <typename T1, typename T2>
void operator ()( const T1& value, const T2& message ) {
cout << "Two arguments, (1) = " << value << ", (2) = " << message << endl;
}
};
struct ThreeArguments {
void operator ()( int value, const string& message, double value2 ) {
cout << "Two arguments, (1) = " << value << ", (2) = " << message
<< ", (3) = " << value2 << endl;
}
};
struct FunctionClass {
FunctionClass() {
cout << "FunctionClass created." << endl;
}
~FunctionClass() {
cout << "FunctionClass deleted." << endl;
}
void print() {
cout << "Printing." << endl;
}
void takeIt( string& str ) {
cout << "FunctionClass::takeIt( " << str << " )" << endl;
}
void showMessage( int value, const string& message ) {
cout << "(" << value << "): " << message << endl;
}
void showMessage2( const string& message1, const string& message2) {
cout << "(" << message1 << ", " << message2 << ")" << endl;
}
void threeArgs( int value, const string& str, double pi ) {
cout << "(" << value << "): " << str << ", pi = " << pi << endl;
}
};
struct Printer {
void printInt(int value) {
cout << "Int:" << value << endl;
}
void printString(string value) {
cout << "string:" << value << endl;
}
void printFloat(float value) {
cout << "Float:" << value << endl;
}
};
int main() {
using FbTk::Signal;
using FbTk::SignalTracker;
Signal<> no_arg;
no_arg.connect( NoArgument() );
Signal<int> one_arg;
one_arg.connect( OneArgument() );
Signal<int, const string&> two_args;
two_args.connect( TwoArguments() );
Signal<int, const string&, double> three_args;
three_args.connect( ThreeArguments() );
// emit test
no_arg.emit();
one_arg.emit( 10 );
two_args.emit( 10, "Message" );
three_args.emit( 10, "Three", 3.141592 );
// test signal tracker
{
cout << "---- tracker ----" << endl;
SignalTracker tracker;
// setup two new slots and track them
SignalTracker::TrackID id_no_arg = tracker.join( no_arg, NoArgument() );
SignalTracker::TrackID id_one_arg = tracker.join( one_arg, OneArgument() );
// two outputs each from these two signals
no_arg.emit();
one_arg.emit( 31 );
// stop tracking id_one_arg, which should keep the slot after this scope,
// the id_no_arg connection should be destroyed after this.
tracker.leave( id_one_arg );
cout << "---- tracker end ----" << endl;
}
// now we should have one output from no_arg and two outputs from one_arg
no_arg.emit();
one_arg.emit( 2 );
using FbTk::MemFun;
FunctionClass obj;
no_arg.clear();
no_arg.connect(MemFun(obj, &FunctionClass::print));
no_arg.emit();
string takeThis("Take this");
Signal<string&> ref_arg;
ref_arg.connect(MemFun(obj, &FunctionClass::takeIt));
ref_arg.emit( takeThis );
two_args.clear();
two_args.connect(MemFun(obj, &FunctionClass::showMessage));
two_args.emit(10, "This is a message");
three_args.clear();
three_args.connect(MemFun(obj, &FunctionClass::threeArgs));
three_args.emit(9, "nine", 3.141592);
// Test ignore signals
{
cout << "----------- Testing ignoring arguments for signal." << endl;
using FbTk::MemFunIgnoreArgs;
// Create a signal that emits with three arguments, and connect
// sinks that takes less than three arguments.
Signal<string, string, float> more_args;
more_args.connect(MemFunIgnoreArgs(obj, &FunctionClass::print));
more_args.connect(MemFunIgnoreArgs(obj, &FunctionClass::takeIt));
more_args.connect(MemFunIgnoreArgs(obj, &FunctionClass::showMessage2));
more_args.emit("This should be visible for takeIt(string)",
"Visible to the two args function.",
2.9);
}
// Test relay new signals to old
{
cout << "---------- Testing relay of signals" << endl;
struct Observer: public FbTk::Observer {
void update(FbTk::Subject* subj) {
cout << "Observer called." << endl;
}
};
// setup old subject->observer listening
FbTk::Subject destination;
Observer obs;
destination.attach(&obs);
// create a new signal and relay it to the
// old subject
FbTk::Signal<string> source;
FbTk::relaySignal(source, destination);
// the new signal should now make the old
// subject notify its observers
source.emit("hello world");
}
// Test argument selector
{
using namespace FbTk;
Signal<int, string, float> source;
Printer printer;
source.connect(MemFunSelectArg0(printer, &Printer::printInt));
source.connect(MemFunSelectArg1(printer, &Printer::printString));
source.connect(MemFunSelectArg2(printer, &Printer::printFloat));
source.emit(10, "hello", 3.141592);
Signal<string, int> source2;
source2.connect(MemFunSelectArg0(printer, &Printer::printString));
source2.connect(MemFunSelectArg1(printer, &Printer::printInt));
source2.emit("world", 37);
}
}
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