Qt Shortcut Keys activated signals

[Akito_Kami]

I noticed that my code as shown below executes the slot function twice. So the integer being changed either has 1 added twice or subtracted twice. Is this intended or is there a way around this?

  QShortcut *add= new QShortcut(Qt::Key_Plus, this);
  QShortcut *sub= new QShortcut(Qt::Key_hyphen this);

  QSignalMapper *mapper = new QSignalMapper(this);
  QObject::connect(next, SIGNAL(activated()), mapper, SLOT(map()));
  QObject::connect(prev, SIGNAL(activated()), mapper, SLOT(map()));

  mapper->setMapping(next, 1);
  mapper->setMapping(prev, -1);

  QObject::connect(mapper, SIGNAL(mapped(int)), this, SLOT(increment(int)));
  QObject::connect(mapper, SIGNAL(mapped(int)), this, SLOT(increment(int)));

[mrjj]

Hi
Ï think the double issue comes from this

QObject::connect(mapper, SIGNAL(mapped(int)), this, SLOT(increment(int)));
QObject::connect(mapper, SIGNAL(mapped(int)), this, SLOT(increment(int)));

That would fire it twice for an int since they are 100% identical.

[Venkatesh V]

Hi @Akito_Kami ...

try using Qt::UniqueConnection in connect statement... hope problem gets resolved.

[Akito_Kami]

@mrjj Thanks. Removing one of the statements worked.