Detailed Description

The ChangeTrigger triggers default (boolean) output value on input value change.

Properties and Arguments

When operator is used inside a signal its default input is automatically tied to signal's InternalValue or previous operator's output. Its default output is automatically tied to next operator's input or to signal's Value. See also CDP Operator Usage In CDP Signals.

Actual Processing Code of the ChangeTrigger operator

unsigned int ChangeTrigger<T>::Process()
{
  if (m_isPreviousInputSet)
    if (static_cast<T>(m_input) != m_previousInput)
      m_output = !static_cast<bool>(m_output);
  m_previousInput = static_cast<T>(m_input);
  m_isPreviousInputSet = true;
  return STATUS_OK;
}