In relation to "view that is straight", we have this from the Sutta Pitaka itself... specifically MN 9: Sammaditthi Sutta: The Discourse on Right View
"'One of right view, one of right view' is said, friends. In what way is a noble disciple one of right view, whose view is straight, who has perfect confidence in the Dhamma, and has arrived at this true Dhamma?"
"Indeed, friend, we would come from far away to learn from the Venerable Sariputta the meaning of this statement. It would be good if the Venerable Sariputta would explain the meaning of this statement. Having heard it from him, the bhikkhus will remember it."
"Then, friends, listen and attend closely to what I shall say."
"Yes, friend," the bhikkhus replied. The Venerable Sariputta said this:......"
What follows are five different ways in which a noble disciple can be one of right view via "understanding" of either:
- The wholesome and the unwholesome (which accords with the commentarial analysis provided above by Paul)
- The Four Noble Truths
- Paticcasamuppada (split by each component)
However, no mention of Right View coming about via other means. This should be unsurprising, as the Buddha himself said...
AN 2.126 wrote:"Monks, there are these two conditions for the arising of right view. Which two? The voice of another and appropriate attention. These are the two conditions for the arising of right view."