Update SmoothScrollDelegate from scroll_bar.py

[apooreapo]

Default behaviour of scrollable widgets in PyQt and Qt is to propagate the scrolling event to parent widgets whenever their scrolling area is at its end. All of the widgets that use SmoothScrollDelegate would cause an issue when used inside another QScrollArea. By checking if the scrollbar is at its end, we can avoid this issue.

[zhiyiYo]

A more concise way:

def eventFilter(self, obj, e: QEvent):
        if e.type() == QEvent.Type.Wheel:
            # Check if the vertical scroll is at its limit
            verticalAtEnd = (e.angleDelta().y() < 0 and self.vScrollBar.value() == self.vScrollBar.maximum()) or \
                            (e.angleDelta().y() > 0 and self.vScrollBar.value() == self.vScrollBar.minimum())

            # Check if the horizontal scroll is at its limit
            horizontalAtEnd = (e.angleDelta().x() < 0 and self.hScrollBar.value() == self.hScrollBar.maximum()) or \
                              (e.angleDelta().x() > 0 and self.hScrollBar.value() == self.hScrollBar.minimum())

            if verticalAtEnd or horizontalAtEnd:
                return False

            if e.angleDelta().y() != 0:
                if not self.useAni:
                    self.verticalSmoothScroll.wheelEvent(e)
                else:
                    self.vScrollBar.scrollValue(-e.angleDelta().y())
            else:
                if not self.useAni:
                    self.horizonSmoothScroll.wheelEvent(e)
                else:
                    self.hScrollBar.scrollValue(-e.angleDelta().x())

            e.setAccepted(True)
            return True

        return super().eventFilter(obj, e)

[zhiyiYo]

We can make the code more concise

[apooreapo]

Seems good.