def _test_visibility(self, view: StickyGraphicsView) -> None:
header = view.headerView()
footer = view.footerView()
vsbar = view.verticalScrollBar()
vsbar.triggerAction(vsbar.SliderToMinimum)
self._ensure_laid_out(view)
self.assertFalse(header.isVisibleTo(view))
self.assertTrue(footer.isVisibleTo(view))
vsbar.triggerAction(vsbar.SliderSingleStepAdd)
self._ensure_laid_out(view)
self.assertTrue(header.isVisibleTo(view))
self.assertTrue(footer.isVisibleTo(view))
vsbar.triggerAction(vsbar.SliderToMaximum)
self._ensure_laid_out(view)
self.assertTrue(header.isVisibleTo(view))
self.assertFalse(footer.isVisibleTo(view))
vsbar.triggerAction(vsbar.SliderSingleStepSub)
self._ensure_laid_out(view)
if not view.style().styleHint(QStyle.SH_ScrollBar_Transient, None,
vsbar):
# cannot reliably test due to QTBUG-65074
self.assertTrue(header.isVisibleTo(view))
self.assertTrue(footer.isVisibleTo(view))
def test(self):
view = StickyGraphicsView()
scene = QGraphicsScene(view)
scene.setBackgroundBrush(QBrush(Qt.lightGray, Qt.CrossPattern))
view.setScene(scene)
scene.addRect(QRectF(0, 0, 300, 20), Qt.red,
QBrush(Qt.red, Qt.BDiagPattern))
scene.addRect(QRectF(0, 25, 300, 100))
scene.addRect(QRectF(0, 130, 300, 20), Qt.darkGray,
QBrush(Qt.darkGray, Qt.BDiagPattern))
view.setHeaderSceneRect(QRectF(0, 0, 300, 20))
view.setFooterSceneRect(QRectF(0, 130, 300, 20))
header = view.headerView()
footer = view.footerView()
view.resize(310, 310)
view.grab()
self.assertFalse(header.isVisibleTo(view))
self.assertFalse(footer.isVisibleTo(view))
view.resize(310, 100)
view.verticalScrollBar().setValue(0) # scroll to top
view.grab()
self.assertFalse(header.isVisibleTo(view))
self.assertTrue(footer.isVisibleTo(view))
view.verticalScrollBar().setValue(
view.verticalScrollBar().maximum()) # scroll to bottom
view.grab()
self.assertTrue(header.isVisibleTo(view))
self.assertFalse(footer.isVisibleTo(view))
qWheelScroll(header.viewport(), angleDelta=QPoint(0, -720 * 8))
