QSignalMapper and argument problems

[Lykurg]

because the matrix of buttons is indexed with two integers...

int x,y;
QString id = QString("%1-%2").arg(x).arg(y);
// in the slot:
int x, y;
QStringList tmp = id.split("-");
x = tmp.at(0).toInt();
y = tmp.at(1).toInt();

int x,y;
QString id = QString("%1-%2").arg(x).arg(y);
// in the slot:
int x, y;
QStringList tmp = id.split("-");
x = tmp.at(0).toInt();
y = tmp.at(1).toInt();

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or you create a local

QHash< QString (id), QPair< int (x), int (y) > > mapping;

QHash< QString (id), QPair< int (x), int (y) > > mapping;

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I have the problem of choosing the value that has to be assigned to a button depending on the selected tool...

but you can surely access that information from your slot! there must be a pointer in your class, beside how would you do it when creating the connection, if you have there access you also have it in your slot.