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comparison qt/d2/qt/Signal.d @ 284:1f6923c8cba0

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consistent emit syntax.
author eldar
date Fri, 16 Oct 2009 12:23:12 +0000
parents 256ab6cb8e85
children f9559a957be9
comparison
equal deleted inserted replaced
283:b61a413fc2f5 284:1f6923c8cba0
779 foreach(ref c; connections) 779 foreach(ref c; connections)
780 c.free; 780 c.free;
781 } 781 }
782 } 782 }
783 783
784 //TODO: this could be avoided if named mixins didn't suck.
785 public struct SignalOps(int sigId, A...)
786 {
787 private SignalHandler sh;
788 enum { signalId = sigId }
789
790 void emit(A args)
791 {
792 sh.emit(signalId, args);
793 }
794
795 debug size_t slotCount()
796 {
797 return sh.slotCount(signalId);
798 }
799 }
800
801 public template SignalHandlerOps() 784 public template SignalHandlerOps()
802 { 785 {
803 static assert (is(typeof(this.signalHandler)), 786 static assert (is(typeof(this.signalHandler)),
804 "SignalHandlerOps is already instantiated in " ~ typeof(this).stringof ~ " or one of its base classes"); 787 "SignalHandlerOps is already instantiated in " ~ typeof(this).stringof ~ " or one of its base classes");
805 788
1021 static if (is(result == void)) 1004 static if (is(result == void))
1022 static assert(0, "Signal " ~ name ~ " was not found."); 1005 static assert(0, "Signal " ~ name ~ " was not found.");
1023 } 1006 }
1024 } 1007 }
1025 1008
1009 string __toString(long v)
1010 {
1011 if (v == 0)
1012 return "0";
1013
1014 string ret;
1015
1016 bool neg;
1017 if (v < 0)
1018 {
1019 neg = true;
1020 v = -v;
1021 }
1022
1023 while (v != 0)
1024 {
1025 ret = cast(char)(v % 10 + '0') ~ ret;
1026 v = cast(long)(v / 10);
1027 }
1028
1029 if (neg)
1030 ret = "-" ~ ret;
1031
1032 return ret;
1033 }
1034
1035 public string SignalEmitter(A...)(SignalType signalType, string name, int index)
1036 {
1037 string fullArgs, args;
1038 static if (A.length)
1039 {
1040 fullArgs = A[0].stringof ~ " a0";
1041 args = ", a0";
1042 foreach(i, _; A[1..$])
1043 {
1044 fullArgs ~= ", " ~ A[i+1].stringof ~ " a" ~ __toString(i+1);
1045 args ~= ", a" ~ __toString(i+1);
1046 }
1047 }
1048 string attribute;
1049 string sigName = name;
1050 if (signalType == SignalType.BindQtSignal)
1051 name ~= "_emit";
1052 else
1053 attribute = "protected ";
1054 string str = attribute ~ "void " ~ name ~ "(" ~ fullArgs ~ ")" ~
1055 "{ this.signalHandler.emit(" ~ __toString(index) ~ args ~ "); }";
1056 return str;
1057 }
1058
1026 /** ---------------- */ 1059 /** ---------------- */
1027 1060
1028 1061
1029 /** 1062 /**
1030 Examples: 1063 Examples:
1056 } 1089 }
1057 } 1090 }
1058 } 1091 }
1059 ---- 1092 ----
1060 */ 1093 */
1094
1095 enum SignalType
1096 {
1097 BindQtSignal,
1098 NewSignal
1099 }
1100
1101 template BindQtSignal(string name, A...)
1102 {
1103 mixin SignalImpl!(0, name, SignalType.BindQtSignal, A);
1104 }
1105
1061 template Signal(string name, A...) 1106 template Signal(string name, A...)
1062 { 1107 {
1063 mixin SignalImpl!(0, name, A); 1108 mixin SignalImpl!(0, name, SignalType.NewSignal, A);
1064 } 1109 }
1065 1110
1066 template SignalImpl(int index, string name, A...) 1111 template SignalImpl(int index, string name, SignalType signalType, A...)
1067 { 1112 {
1068 static if (is(typeof(mixin(typeof(this).stringof ~ ".__signal" ~ ToString!(index))))) 1113 static if (is(typeof(mixin(typeof(this).stringof ~ ".__signal" ~ ToString!(index)))))
1069 mixin SignalImpl!(index + 1, name, A); 1114 mixin SignalImpl!(index + 1, name, signalType, A);
1070 else 1115 else
1071 { 1116 {
1072 // mixed-in once 1117 // mixed-in once
1073 static if (!is(typeof(this.signalHandler))) 1118 static if (!is(typeof(this.signalHandler)))
1074 {
1075 mixin SignalHandlerOps; 1119 mixin SignalHandlerOps;
1076 } 1120
1121 mixin (SignalEmitter!(A)(signalType, name, index));
1077 mixin("public alias TypeTuple!(\"" ~ name ~ "\", index, A) __signal" ~ ToString!(index) ~ ";"); 1122 mixin("public alias TypeTuple!(\"" ~ name ~ "\", index, A) __signal" ~ ToString!(index) ~ ";");
1078 mixin("SignalOps!(" ~ ToString!(index) ~ ", A) " ~ name ~ "(){ return SignalOps!("
1079 ~ ToString!(index) ~ ", A)(signalHandler); }");
1080 } 1123 }
1081 } 1124 }
1082 1125
1083 extern(C) alias void function(void*) SlotConnector; 1126 extern(C) alias void function(void*) SlotConnector;
1084 1127