Get currently visible QModelIndexes in QListView, QTableView or QTreeView

getVisibleIndexes.py

# Put this in the class
def get_visible_indexes(self, column=0):
	"find all galleries in viewport"
	# used to find first index
	gridW = self.W # width of single items
	gridH = self.H # height of single items
	region = self.viewport().visibleRegion()
	idx_found = []

	def idx_is_visible(idx):
		idx_rect = self.visualRect(idx)
		return region.contains(idx_rect) or region.intersects(idx_rect)

	#get first index
	first_idx = self.indexAt(QPoint(gridW//2, 0)) # to get indexes on the way out of view
	if not first_idx.isValid():
		first_idx = self.indexAt(QPoint(gridW//2, gridH//2))

	if first_idx.isValid():
		nxt_idx = first_idx
		# now traverse items until index isn't visible
		while(idx_is_visible(nxt_idx)):
			idx_found.append(nxt_idx)
			nxt_idx = nxt_idx.sibling(nxt_idx.row()+1, column)
		
	return idx_found