Method setPosition

Telegram/SourceFiles/ui/widgets/multi_select.cpp:288–349

}

void Item::setPosition(int x, int y, int outerWidth, int maxVisiblePadding) {
	if (_x >= 0 && _y >= 0 && (_x != x || _y != y)) {
		// Make an animation if it is not the first setPosition().
		auto found = false;
		auto leftHidden = -_width - maxVisiblePadding;
		auto rightHidden = outerWidth + maxVisiblePadding;
		for (auto i = _copies.begin(), e = _copies.end(); i != e;) {
			if (i->x.animating()) {
				if (i->y == y) {
					i->x.start(_updateCallback, i->toX, x, _st.duration);
					found = true;
				} else {
					i->x.start(
						_updateCallback,
						i->fromX,
						(i->toX > i->fromX) ? rightHidden : leftHidden,
						_st.duration);
				}
				++i;
			} else {
				i = _copies.erase(i);
				e = _copies.end();
			}
		}
		if (_copies.empty()) {
			if (_y == y) {
				auto copy = SlideAnimation(
					_updateCallback,
					_x,
					x,
					_y,
					_st.duration);
				_copies.push_back(std::move(copy));
			} else {
				auto copyHiding = SlideAnimation(
					_updateCallback,
					_x,
					(y > _y) ? rightHidden : leftHidden,
					_y,
					_st.duration);
				_copies.push_back(std::move(copyHiding));
				auto copyShowing = SlideAnimation(
					_updateCallback,
					(y > _y) ? leftHidden : rightHidden,
					x,
					y,
					_st.duration);
				_copies.push_back(std::move(copyShowing));
			}
		} else if (!found) {
			auto copy = SlideAnimation(
				_updateCallback,
				(y > _y) ? leftHidden : rightHidden,
				x,
				y,
				_st.duration);
			_copies.push_back(std::move(copy));
		}