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4 years, 10 months ago.
How to attach one class's method to object of another class
Dear friends, I need your help. I have two classes: "Button". "Encoder". Encoder class contains a member of Button type. Button class has some event that executes some function located in clickFunc variable and and a funciotn attachClick to write this variable. I'm trying to attach one of Encoder's method to Button's object with the help of Callback class and get ting a error message. Can you please tell me how to do this correct?
include the mbed library with this snippet
#include <mbed.h>
//callback function declaration
typedef void (*callbackFunction)(void);
class Button
{
callbackFunction clickFunc;
public:
void attachClick(callbackFunction newFunction);
} btn;
void Button::attachClick(callbackFunction newFunction)
{
clickFunc = newFunction;
};
class Encoder
{
//a member of "Encoder" class
Button sw;
void swFunction (void);
public:
//Constructor
Encoder();
} enc;
void Encoder::swFunction (void){
//doing something;
};
Encoder::Encoder(){
sw.attachClick(callback(this, &Encoder::swFunction)); //Here is a problem...
};
int main()
{
while (true) {
}
}
1 Answer
4 years, 10 months ago.
Hello Alexander,
You can try something like:
#include <mbed.h>
//callback function declaration
//typedef void (*callbackFunction)(void); // Recplaced by "Callback<void ()>"
class Button
{
Callback<void ()> clickFunc;
public:
void attachClick(Callback<void ()> newFunction);
} btn;
void Button::attachClick(Callback<void ()> newFunction)
{
clickFunc = newFunction;
};
class Encoder
{
//a member of "Encoder" class
Button sw;
void swFunction(void);
public:
//Constructor
Encoder();
} enc;
void Encoder::swFunction(void)
{
//doing something;
};
Encoder::Encoder()
{
sw.attachClick(callback(this, &Encoder::swFunction));
};
int main()
{
while (true) { }
}
Accepted Answer