Wrapper classes for the emwin library
Dependents: app_emwin1 app_emwin2_pos lpc4088_ebb_gui_emwin
Diff: EwFunctionPointer.h
- Revision:
- 0:316c181e9b65
diff -r 000000000000 -r 316c181e9b65 EwFunctionPointer.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EwFunctionPointer.h Mon Dec 16 07:03:22 2013 +0000 @@ -0,0 +1,90 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef EWFUNCTIONPOINTER_H +#define EWFUNCTIONPOINTER_H + +#include <string.h> +#include <stdint.h> +#include "EwWindow.h" + + + + +/** A class for storing and calling a pointer to a static or member void function + */ +class EwFunctionPointer { +public: + + /** Create a FunctionPointer, attaching a static function + * + * @param function The void static function to attach (default is none) + */ + EwFunctionPointer(void (*function)(EwWindow* w) = 0); + + /** Create a FunctionPointer, attaching a member function + * + * @param object The object pointer to invoke the member function on (i.e. the this pointer) + * @param function The address of the void member function to attach + */ + template<typename T> + EwFunctionPointer(T *object, void (T::*member)(EwWindow* w)) { + attach(object, member); + } + + /** Attach a static function + * + * @param function The void static function to attach (default is none) + */ + void attach(void (*function)(EwWindow* w) = 0); + + /** Attach a member function + * + * @param object The object pointer to invoke the member function on (i.e. the this pointer) + * @param function The address of the void member function to attach + */ + template<typename T> + void attach(T *object, void (T::*member)(EwWindow* w)) { + _object = static_cast<void*>(object); + memcpy(_member, (char*)&member, sizeof(member)); + _membercaller = &EwFunctionPointer::membercaller<T>; + _function = 0; + } + + /** Call the attached static or member function + */ + void call(EwWindow* w); + + + + +private: + template<typename T> + static void membercaller(void *object, char *member, EwWindow* w) { + T* o = static_cast<T*>(object); + void (T::*m)(EwWindow* w); + memcpy((char*)&m, member, sizeof(m)); + (o->*m)(w); + } + + void (*_function)(EwWindow* w); // static function pointer - 0 if none attached + void *_object; // object this pointer - 0 if none attached + char _member[16]; // raw member function pointer storage - converted back by registered _membercaller + void (*_membercaller)(void*, char*, EwWindow* w); // registered membercaller function to convert back and call _member on _object +}; + + + +#endif