Method SetHandler

Plugins/org.blueberry.core.commands/src/berryCommand.cpp:407–464

}

bool Command::SetHandler(const IHandler::Pointer handler)
{
  if (handler == this->handler)
  {
    return false;
  }

  // Swap the state around.
  const QList<QString> stateIds(this->GetStateIds());
  for (int i = 0; i < stateIds.size(); ++i)
  {
    const QString stateId = stateIds[i];
    if (IObjectWithState::Pointer stateHandler = this->handler.Cast<IObjectWithState>())
    {
      stateHandler->RemoveState(stateId);
    }
    if (IObjectWithState::Pointer stateHandler = handler.Cast<IObjectWithState>())
    {
      const State::Pointer stateToAdd(this->GetState(stateId));
      stateHandler->AddState(stateId, stateToAdd);
    }
  }

  bool enabled = this->IsEnabled();
  if (this->handler)
  {
    this->handler->RemoveHandlerListener(this->GetHandlerListener());
  }

  // Update the handler, and flush the string representation.
  this->handler = handler;
  if (this->handler)
  {
    this->handler->AddHandlerListener(this->GetHandlerListener());
  }
  this->str = "";

  // Debugging output
  if ((DEBUG_HANDLERS)
      && ((DEBUG_HANDLERS_COMMAND_ID.isEmpty()) || (DEBUG_HANDLERS_COMMAND_ID == id)))
  {
    QString buffer("Command('");
    buffer += id + "') has changed to ";
    if (!handler) {
      buffer += "no handler";
    } else {
      buffer += "\'" + handler->ToString() + "' as its handler";
    }
    CommandTracing::PrintTrace("HANDLERS", buffer);
  }

  // Send notification
  CommandEvent::Pointer cmdEvent(new CommandEvent(Command::Pointer(this), false, false, false, true,
                                                  false, false, false, false, enabled != this->IsEnabled()));
  this->FireCommandChanged(cmdEvent);

  return true;
}