How to remove the mapper's item?

[Eng.Jason]

Hello, I used a QSignalMapper for used to lot of button clicked() event.

unfortunately, i can't find, how to remove the QSignalMapper's item.

So, I use QSignalMapper Iike this.

------------------------------------main.cpp-------------------------------
// in main.cpp
#define COUNT 7
QSignalMapper *mapper = new SignalMapper();

QList<QPushButton *> mButtons ;

//setting
for(int i =0; i < COUNT; i++)
{
   QPushButton *pbtn = new QPushButton( );
   mButtons.append(pbtn);
   
  connect(mButtons[i], SIGNAL(clicked()), mapper, SLOT(map()));
  mapper->setMapping(mButton[i], i); 
}
RemoveMap(3);

-----------------------------------------------------------------------------

void myclass::RemoveMap(int index)
{
 // I want to know, how to remove mapper's item by index parameter.
 // I saw the removeMappings( ) function, but I couldn't guess the how to use it;..
}

I need your help. thank you.

[SGaist]

Hi,

Something like mapper->removeMapping(myButton[i]);

[kshegunov]

@Eng.Jason
To add to @SGaist, you seem to be using one mapper with multiple buttons, which will not work. A signal mapper will map a single signal, from a single object.

EDIT: Disregard this completely wrong comment.

[SGaist]

@kshegunov Why will it not work ? AFAIK that's the goal of QSignalMapper: to map several objects to one signal with a parameter of known value.

[kshegunov]

@SGaist said:

Why will it not work ? AFAIK that's the goal of QSignalMapper: to map several objects to one signal with a parameter of known value.

I seem to have missed my morning coffee when I wrote that. Sure it will work.