class - Data Structure for KeyBoardEvents C++ -
i working on input system part of tutorial watching, , google searching, find 1 method online handling input via switch statement in application loop.
i can't find examples tutorial takes in mod keys shift, alt , ctrl. found enough can pull current mods can not find convenient way achieve do.
my plan have input class part of application class. input can passed window , game objects way have single input state system entire program. wanted register callback functions within game or window necessary, , way know how via <functional>. thought have std::map<key scancode,std::function<void()>> sort of situation. however, since need account modding of key, there way generate unique key value combined of scancode , mods, example a, shift + a , ctrl+a?
right solution think bit hacked need have unique std::map set each modifier combination.
current registration (minus implementation of inserting key/func pair map), need individual map each if block below. there better way manage this?
void register(sdl_keyboardevent key, std::function<void()> func ) { if( !( key.keysym.sym == sdlk_lshift || key.keysym.sym == sdlk_rshift || key.keysym.sym == sdlk_lctrl || key.keysym.sym == sdlk_rctrl || key.keysym.sym == sdlk_lalt || key.keysym.sym == sdlk_ralt )) { if( (( key.keysym.mod & ( kmod_lshift | kmod_rshift )) > 0 ) && (( key.keysym.mod & ( kmod_lctrl | kmod_rctrl )) > 0 ) && (( key.keysym.mod & ( kmod_lalt | kmod_ralt )) > 0 )) { std::cout << "ctrl + alt + shift + " << key.keysym.sym << std::endl; } else if ( (( key.keysym.mod & ( kmod_lshift | kmod_rshift )) > 0 ) && (( key.keysym.mod & ( kmod_lctrl | kmod_rctrl )) > 0 )) { std::cout << "shift + ctrl + " << key.keysym.sym << std::endl; } else if ( (( key.keysym.mod & ( kmod_lshift | kmod_rshift )) > 0 ) && (( key.keysym.mod & ( kmod_lalt | kmod_ralt )) > 0 )) { std::cout << "shift + alt + " << key.keysym.sym << std::endl; } else if ( (( key.keysym.mod & ( kmod_lctrl | kmod_rctrl )) > 0 ) && (( key.keysym.mod & ( kmod_lalt | kmod_ralt )) > 0 )) { std::cout << "ctrl + alt + " << key.keysym.sym << std::endl; } else if (( key.keysym.mod & ( kmod_lshift | kmod_rshift )) > 0 ) { std::cout << "shift + " << key.keysym.sym << std::endl; } else if (( key.keysym.mod & ( kmod_lalt | kmod_ralt )) > 0 ) { std::cout << "alt + " << key.keysym.sym << std::endl; } else if (( key.keysym.mod & ( kmod_lctrl | kmod_rctrl )) > 0 ) { std::cout << "ctrl + " << key.keysym.sym << std::endl; } else { std::cout << "unmodded " << key.keysym.sym << " mods: " << key.keysym.mod << std::endl; } } } currently:
std::map<key,std::function<void()>> callbacks; struct key { sdl_scancode code; uint16 kmod; bool operator<( const key & okey) const { return std::tie( code,kmod ) < std::tie( okey.code,okey.kmod ); } }; void input::regcallback(sdl_scancode k, uint16 kmod, std::function<void()> func) { key tkey; tkey.code = k; tkey.kmod = kmod; callbacks[tkey] = func; //does not this. return; } intellisense error is:
error: no instance of overloaded function "std::map<_kty,_ty,_pr,_alloc>::insert [with _kty=key,_ty=std::function,_pr=std::less,_alloc=std::allocator>>]" matches argument list argument types are:( std::pair>)
object type is: std::map, std::less, std::allocator>>>
and following compiler output
1>------ build started: project: 3d game tut, configuration: debug win32 ------ 1>build started 7/22/2015 3:31:55 pm. 1>initializebuildstatus: 1> creating "debug\3d game tut.unsuccessfulbuild" because "alwayscreate" specified. 1>clcompile: 1> input.cpp 1>c:\users\frizzlefry\documents\visual studio 2012\projects\3d game tut\3d game tut\input.cpp(65): error c2679: binary '[' : no operator found takes right-hand operand of type 'input::key' (or there no acceptable conversion) 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\map(173): 'std::function<_fty> &std::map<_kty,_ty>::operator [](key &&)' 1> 1> [ 1> _fty=void (void), 1> _kty=key, 1> _ty=std::function<void (void)> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\map(190): or 'std::function<_fty> &std::map<_kty,_ty>::operator [](const key &)' 1> 1> [ 1> _fty=void (void), 1> _kty=key, 1> _ty=std::function<void (void)> 1> ] 1> while trying match argument list '(std::map<_kty,_ty>, input::key)' 1> 1> [ 1> _kty=key, 1> _ty=std::function<void (void)> 1> ] 1> generating code... 1> compiling... 1> game.cpp 1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\utility(201): error c2079: 'std::pair<_ty1,_ty2>::first' uses undefined struct 'key' 1> 1> [ 1> _ty1=const key, 1> _ty2=std::function<void (void)> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(498) : see reference class template instantiation 'std::pair<_ty1,_ty2>' being compiled 1> 1> [ 1> _ty1=const key, 1> _ty2=std::function<void (void)> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(593) : see reference class template instantiation 'std::_tree_node<_value_type,_voidptr>' being compiled 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void * 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(592) : while compiling class template member function 'std::_tree_node<_value_type,_voidptr> *&std::_tree_val<_val_types>::_left(std::_tree_node<_value_type,_voidptr> *)' 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void *, 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(864) : see reference function template instantiation 'std::_tree_node<_value_type,_voidptr> *&std::_tree_val<_val_types>::_left(std::_tree_node<_value_type,_voidptr> *)' being compiled 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void *, 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(766) : see reference class template instantiation 'std::_tree_val<_val_types>' being compiled 1> 1> [ 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(884) : see reference class template instantiation 'std::_tree_alloc<_al_has_storage,_alloc_types>' being compiled 1> 1> [ 1> _al_has_storage=false, 1> _alloc_types=std::_tree_base_types<std::pair<const key,std::function<void (void)>>,std::allocator<std::pair<const key,std::function<void (void)>>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(996) : see reference class template instantiation 'std::_tree_buy<_ty,_alloc>' being compiled 1> 1> [ 1> _ty=std::pair<const key,std::function<void (void)>>, 1> _alloc=std::allocator<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(1029) : see reference class template instantiation 'std::_tree_comp<_pr_has_storage,_traits>' being compiled 1> 1> [ 1> _pr_has_storage=false, 1> _traits=std::_tmap_traits<key,std::function<void (void)>,std::less<key>,std::allocator<std::pair<const key,std::function<void (void)>>>,false> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\map(67) : see reference class template instantiation 'std::_tree<_traits>' being compiled 1> 1> [ 1> _traits=std::_tmap_traits<key,std::function<void (void)>,std::less<key>,std::allocator<std::pair<const key,std::function<void (void)>>>,false> 1> ] 1> c:\users\frizzlefry\documents\visual studio 2012\projects\3d game tut\3d game tut\input.h(21) : see reference class template instantiation 'std::map<_kty,_ty>' being compiled 1> 1> [ 1> _kty=key, 1> _ty=std::function<void (void)> 1> ] 1> generating code... 1> compiling... 1> kapp.cpp 1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\utility(201): error c2079: 'std::pair<_ty1,_ty2>::first' uses undefined struct 'key' 1> 1> [ 1> _ty1=const key, 1> _ty2=std::function<void (void)> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(498) : see reference class template instantiation 'std::pair<_ty1,_ty2>' being compiled 1> 1> [ 1> _ty1=const key, 1> _ty2=std::function<void (void)> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(593) : see reference class template instantiation 'std::_tree_node<_value_type,_voidptr>' being compiled 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void * 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(592) : while compiling class template member function 'std::_tree_node<_value_type,_voidptr> *&std::_tree_val<_val_types>::_left(std::_tree_node<_value_type,_voidptr> *)' 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void *, 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(864) : see reference function template instantiation 'std::_tree_node<_value_type,_voidptr> *&std::_tree_val<_val_types>::_left(std::_tree_node<_value_type,_voidptr> *)' being compiled 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void *, 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(766) : see reference class template instantiation 'std::_tree_val<_val_types>' being compiled 1> 1> [ 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(884) : see reference class template instantiation 'std::_tree_alloc<_al_has_storage,_alloc_types>' being compiled 1> 1> [ 1> _al_has_storage=false, 1> _alloc_types=std::_tree_base_types<std::pair<const key,std::function<void (void)>>,std::allocator<std::pair<const key,std::function<void (void)>>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(996) : see reference class template instantiation 'std::_tree_buy<_ty,_alloc>' being compiled 1> 1> [ 1> _ty=std::pair<const key,std::function<void (void)>>, 1> _alloc=std::allocator<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(1029) : see reference class template instantiation 'std::_tree_comp<_pr_has_storage,_traits>' being compiled 1> 1> [ 1> _pr_has_storage=false, 1> _traits=std::_tmap_traits<key,std::function<void (void)>,std::less<key>,std::allocator<std::pair<const key,std::function<void (void)>>>,false> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\map(67) : see reference class template instantiation 'std::_tree<_traits>' being compiled 1> 1> [ 1> _traits=std::_tmap_traits<key,std::function<void (void)>,std::less<key>,std::allocator<std::pair<const key,std::function<void (void)>>>,false> 1> ] 1> c:\users\frizzlefry\documents\visual studio 2012\projects\3d game tut\3d game tut\input.h(21) : see reference class template instantiation 'std::map<_kty,_ty>' being compiled 1> 1> [ 1> _kty=key, 1> _ty=std::function<void (void)> 1> ] 1> generating code... 1> compiling... 1> source.cpp 1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\utility(201): error c2079: 'std::pair<_ty1,_ty2>::first' uses undefined struct 'key' 1> 1> [ 1> _ty1=const key, 1> _ty2=std::function<void (void)> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(498) : see reference class template instantiation 'std::pair<_ty1,_ty2>' being compiled 1> 1> [ 1> _ty1=const key, 1> _ty2=std::function<void (void)> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(593) : see reference class template instantiation 'std::_tree_node<_value_type,_voidptr>' being compiled 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void * 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(592) : while compiling class template member function 'std::_tree_node<_value_type,_voidptr> *&std::_tree_val<_val_types>::_left(std::_tree_node<_value_type,_voidptr> *)' 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void *, 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(864) : see reference function template instantiation 'std::_tree_node<_value_type,_voidptr> *&std::_tree_val<_val_types>::_left(std::_tree_node<_value_type,_voidptr> *)' being compiled 1> 1> [ 1> _value_type=std::pair<const key,std::function<void (void)>>, 1> _voidptr=void *, 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(766) : see reference class template instantiation 'std::_tree_val<_val_types>' being compiled 1> 1> [ 1> _val_types=std::_tree_simple_types<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(884) : see reference class template instantiation 'std::_tree_alloc<_al_has_storage,_alloc_types>' being compiled 1> 1> [ 1> _al_has_storage=false, 1> _alloc_types=std::_tree_base_types<std::pair<const key,std::function<void (void)>>,std::allocator<std::pair<const key,std::function<void (void)>>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(996) : see reference class template instantiation 'std::_tree_buy<_ty,_alloc>' being compiled 1> 1> [ 1> _ty=std::pair<const key,std::function<void (void)>>, 1> _alloc=std::allocator<std::pair<const key,std::function<void (void)>>> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(1029) : see reference class template instantiation 'std::_tree_comp<_pr_has_storage,_traits>' being compiled 1> 1> [ 1> _pr_has_storage=false, 1> _traits=std::_tmap_traits<key,std::function<void (void)>,std::less<key>,std::allocator<std::pair<const key,std::function<void (void)>>>,false> 1> ] 1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\map(67) : see reference class template instantiation 'std::_tree<_traits>' being compiled 1> 1> [ 1> _traits=std::_tmap_traits<key,std::function<void (void)>,std::less<key>,std::allocator<std::pair<const key,std::function<void (void)>>>,false> 1> ] 1> c:\users\frizzlefry\documents\visual studio 2012\projects\3d game tut\3d game tut\input.h(21) : see reference class template instantiation 'std::map<_kty,_ty>' being compiled 1> 1> [ 1> _kty=key, 1> _ty=std::function<void (void)> 1> ] 1> generating code... 1> 1>build failed. 1> 1>time elapsed 00:00:02.70 ========== build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
add meta keys maps key type:
struct shortcut { bool shift; bool alt; // ... keysym sym; struct hasher { // hash algorithm }; // add equality operator }; using shortcutsmap = unordered_map<shortcut, function<void(void)>, shortcut::hash>; or, map set of active / pressed keys functions;
using shortcutsmap = unordered_map<unordered_set<key>, function<void(void)>>; you need key class then, capable of holding every pressed key (including meta keys).
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