Method handle

src/Interface/ScrollBar.cpp:155–166

* Automatically updates the scrollbar * when the mouse moves. * @param action Pointer to an action. * @param state State that the action handlers belong to. */

 * @param state State that the action handlers belong to.
 */
void ScrollBar::handle(Action *action, State *state)
{
	InteractiveSurface::handle(action, state);
	if (_pressed && (action->getDetails()->type == SDL_MOUSEMOTION || action->getDetails()->type == SDL_MOUSEBUTTONDOWN))
	{
		int cursorY = action->getAbsoluteYMouse() - getY();
		int y = std::min(std::max(cursorY + _offset, 0), getHeight() - _thumbRect.h + 1);
		double scale = (double)_list->getRows() / getHeight();
		int scroll = (int)Round(y * scale);
		_list->scrollTo(scroll);
	}
}

/**
 * Blits the scrollbar contents.