Question

Is there any function in wxWidgets framework, say, click(), whose function is to emulate a left-click mouse?

Answer 1

No, there is no function like this. If you really need to do it, e.g. because you want to perform some action in another application you need to write platform-specific code yourself (e.g. use SendInput() under Windows).

If you want to use this to execute some code in your own application though, there is a much better solution: instead of doing unsupported, fragile and ugly

void MyClass::OnLeftUp(wxMouseEvent& event)
{
   ... do something with click at event.GetPosition() ...
}

void MyOtherFunction()
{
  wxMouseEvent event(...);
  ... initialization not shown because there is no right way to do it anyhow ...
  myObject->ProcessEvent(event);
}

just refactor your code to do it like this instead:

void MyClass::OnLeftUp(wxMouseEvent& event)
{
   HandleClick(event.GetPosition());
}

void MyClass::HandleClick(const wxPoint& pos)
{
   ... do something with click at pos  ...
}

void MyOtherFunction()
{
  myObject->HandleClick(position);
}