Method createPinnedToTop

Telegram/SourceFiles/settings/settings_search.cpp:151–207

}

base::weak_qptr<Ui::RpWidget> Search::createPinnedToTop(
		not_null<QWidget*> parent) {
	_searchController = std::make_unique<Ui::SearchFieldController>("");
	auto rowView = _searchController->createRowView(
		parent,
		st::infoLayerMediaSearch);
	_searchField = rowView.field;
	_searchField->customUpDown(true);

	const auto searchContainer = Ui::CreateChild<Ui::FixedHeightWidget>(
		parent.get(),
		st::infoLayerMediaSearch.height);
	const auto wrap = rowView.wrap.release();
	wrap->setParent(searchContainer);
	wrap->show();

	searchContainer->widthValue(
	) | rpl::on_next([=](int width) {
		wrap->resizeToWidth(width);
		wrap->moveToLeft(0, 0);
	}, searchContainer->lifetime());

	_searchController->queryChanges() | rpl::on_next([=](QString &&query) {
		rebuildResults(std::move(query));
	}, searchContainer->lifetime());

	_searchField->submits(
	) | rpl::on_next([=](Qt::KeyboardModifiers) {
		const auto index = (_selected >= 0) ? _selected : 0;
		if (index < int(_visibleButtons.size())) {
			_visibleButtons[index]->clicked(
				Qt::NoModifier,
				Qt::LeftButton);
		}
	}, searchContainer->lifetime());

	base::install_event_filter(_searchField, [=](not_null<QEvent*> e) {
		if (e->type() != QEvent::KeyPress) {
			return base::EventFilterResult::Continue;
		}
		const auto key = static_cast<QKeyEvent*>(e.get())->key();
		if (key == Qt::Key_Up
			|| key == Qt::Key_Down
			|| key == Qt::Key_PageUp
			|| key == Qt::Key_PageDown) {
			handleKeyNavigation(key);
			return base::EventFilterResult::Cancel;
		}
		return base::EventFilterResult::Continue;
	}, lifetime());

	if (!_pendingQuery.isEmpty()) {
		_searchField->setText(base::take(_pendingQuery));
	}

	return base::make_weak(not_null<Ui::RpWidget*>{ searchContainer });
}