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authorHenrik Kinnunen <fluxgen@fluxbox.org>2010-03-19 01:23:41 (GMT)
committerHenrik Kinnunen <fluxgen@fluxbox.org>2010-03-19 01:23:41 (GMT)
commitceff86b79401c27ed83cad65f59a6621c9a58084 (patch)
tree3dc59ecc1a7a5b31b2d87686aacc3c6e2dbdc5ab /src/FbTk/MemFun.hh
parent68e90ab84fc8720264694de47c1ac33c401b49e5 (diff)
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Added SelectArg and MemFunSelectArg*
The MemFunSelectArg* functions can be used to select a specific argument from a signal. For example this would select the string argument as argument to the callback: Signal<void, int, float, string> signal; signal.connect(MemFunSelectArg2(obj, &Object::takesOneStringArg)); signal.emit(10, 3.14, "hello"); ... void Object::takesOneStringArg(const string& value) { ... }
Diffstat (limited to 'src/FbTk/MemFun.hh')
-rw-r--r--src/FbTk/MemFun.hh56
1 files changed, 56 insertions, 0 deletions
diff --git a/src/FbTk/MemFun.hh b/src/FbTk/MemFun.hh
index 0425fc6..d265703 100644
--- a/src/FbTk/MemFun.hh
+++ b/src/FbTk/MemFun.hh
@@ -22,6 +22,8 @@
22#ifndef FBTK_MEM_FUN_HH 22#ifndef FBTK_MEM_FUN_HH
23#define FBTK_MEM_FUN_HH 23#define FBTK_MEM_FUN_HH
24 24
25#include "SelectArg.hh"
26
25namespace FbTk { 27namespace FbTk {
26 28
27/// No argument functor 29/// No argument functor
@@ -218,6 +220,60 @@ MemFunIgnoreArgs( Object& obj, ReturnType (Object:: *action)(Arg1,Arg2) ) {
218 return MemFun2IgnoreArgs<ReturnType, Object, Arg1, Arg2>(obj, action); 220 return MemFun2IgnoreArgs<ReturnType, Object, Arg1, Arg2>(obj, action);
219} 221}
220 222
223/**
224 * Creates a functor that selects a specific argument of three possible ones
225 * and uses it for the single argument operator.
226 */
227template < int ArgNum, typename Functor>
228class MemFunSelectArgImpl {
229public:
230
231 MemFunSelectArgImpl(Functor func):
232 m_func(func) {
233 }
234
235 template <typename Type1, typename Type2, typename Type3>
236 void operator ()(Type1 a, Type2 b, Type3 c) {
237 m_func(STLUtil::SelectArg<ArgNum>()(a, b, c));
238 }
239
240 template <typename Type1, typename Type2>
241 void operator ()(Type1 a, Type2 b) {
242 m_func(STLUtil::SelectArg<ArgNum>()(a, b));
243 }
244
245 template <typename Type1>
246 void operator ()(Type1 a) {
247 m_func(a);
248 }
249
250private:
251 Functor m_func;
252};
253
254/// Creates a functor that selects the first argument of three possible ones
255/// and uses it for the single argument operator.
256template <typename ReturnType, typename Object, typename Arg1>
257MemFunSelectArgImpl<0, MemFun1<ReturnType, Object, Arg1> >
258MemFunSelectArg0(Object& obj, ReturnType (Object:: *action)(Arg1)) {
259 return MemFunSelectArgImpl<0, MemFun1<ReturnType, Object, Arg1> >(MemFun(obj, action));
260}
261
262/// Creates a functor that selects the second argument (or first if there is
263/// only one) of three possible onesand uses it for the single argument operator.
264template <typename ReturnType, typename Object, typename Arg1>
265MemFunSelectArgImpl<1, MemFun1<ReturnType, Object, Arg1> >
266MemFunSelectArg1(Object& obj, ReturnType (Object:: *action)(Arg1)) {
267 return MemFunSelectArgImpl<1, MemFun1<ReturnType, Object, Arg1> >(MemFun(obj, action));
268}
269
270/// Creates a functor that selects the third argument (or the last argument if there is
271/// less than three arguments) of three possible onesand uses it for the single argument operator.
272template <typename ReturnType, typename Object, typename Arg1>
273MemFunSelectArgImpl<2, MemFun1<ReturnType, Object, Arg1> >
274MemFunSelectArg2(Object& obj, ReturnType (Object:: *action)(Arg1)) {
275 return MemFunSelectArgImpl<2, MemFun1<ReturnType, Object, Arg1> >(MemFun(obj, action));
276}
221 277
222} // namespace FbTk 278} // namespace FbTk
223 279