message: Move pipeline access safety check to single function in Label
diff: @@ -260,7 +260,10 @@ void Connection::toggleLabel(bool show){
  // --------- label ------------
  void Label::paint(QPainter* painter, const QStyleOptionGraphicsItem*, QWidget*) {
  - if (m_signal != nullptr && !Pipeline::getPipeline()->isRunning()) {
  + // Dont draw if we have not attached the label to a signal
  + if(m_signal == nullptr)
  + return;
  +
  // Draw label (connection value)
  const auto text = getText();
  QRectF textRect = getTextRect(text);
  @@ -276,10 +279,13 @@ void Label::paint(QPainter* painter, const QStyleOptionGraphicsItem*, QWidget*)
  textPos.ry() += 14;
  painter->drawText(textPos, text);
  }
  -}
  QString Label::getText() const {
  + if(m_signal != nullptr && !Pipeline::getPipeline()->isRunning()){
  return QString("0x%1").arg(QString().setNum(m_signal->getValue(), 16));
  + } else {
  + return QString();
  + }
  }
  QRectF Label::getTextRect(const QString& text) const{
  @@ -289,15 +295,11 @@ QRectF Label::getTextRect(const QString& text) const{
  }
  QRectF Label::boundingRect() const {
  - if (m_signal != nullptr && !Pipeline::getPipeline()->isRunning()) {
  auto boundingRect = getTextRect(getText());
  // Adjust for pen width etc.
  boundingRect.adjust(-5 - PENWIDTH, - PENWIDTH, 5 + PENWIDTH, 5 + PENWIDTH);
  return boundingRect;
  - } else {
  - return QRectF();
  - }
  }
  } // namespace Graphics
  