1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
#include <iostream>
using namespace std;
#include "../FbTk/Signal.hh"
#include "../FbTk/MemFun.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 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);
}
}
|
