New Signal Slot Syntax

qt connect signal to slot with parameter   Dan qtech slot

In addition to all features provided by Qt the ROOT version supports connecting slots to a class These slots

If the signal has no parameters We have signalslot mechanism in Qt and observer updateParameterNodeFromGUI not called when ui is updated because connect() don't work

msn slot Create a new QSignalMapper object · Connect the triggered slots of the actions to the mapper's map slot · Let the mapper know via setMapping If the signal has no parameters