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Telegram/SourceFiles/dialogs/ui/chat_search_empty.cpp

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "dialogs/ui/chat_search_empty.h"
+
+#include "base/object_ptr.h"
+#include "lottie/lottie_icon.h"
+#include "settings/settings_common.h"
+#include "ui/widgets/labels.h"
+#include "styles/style_dialogs.h"
+
+namespace Dialogs {
+
+SearchEmpty::SearchEmpty(
+	QWidget *parent,
+	Icon icon,
+	rpl::producer<TextWithEntities> text)
+: RpWidget(parent) {
+	setup(icon, std::move(text));
+}
+
+void SearchEmpty::setMinimalHeight(int minimalHeight) {
+	const auto minimal = st::recentPeersEmptyHeightMin;
+	resize(width(), std::max(minimalHeight, minimal));
+}
+
+void SearchEmpty::setup(Icon icon, rpl::producer<TextWithEntities> text) {
+	const auto label = Ui::CreateChild<Ui::FlatLabel>(
+		this,
+		std::move(text),
+		st::defaultPeerListAbout);
+	const auto size = st::recentPeersEmptySize;
+	const auto animation = [&] {
+		switch (icon) {
+		case Icon::Search: return u"search"_q;
+		case Icon::NoResults: return u"noresults"_q;
+		}
+		Unexpected("Icon in SearchEmpty::setup.");
+	}();
+	const auto [widget, animate] = Settings::CreateLottieIcon(
+		this,
+		{
+			.name = animation,
+			.sizeOverride = { size, size },
+		},
+		st::recentPeersEmptyMargin);
+	const auto animated = widget.data();
+
+	sizeValue() | rpl::on_next([=](QSize size) {
+		const auto padding = st::recentPeersEmptyMargin;
+		const auto paddings = padding.left() + padding.right();
+		label->resizeToWidth(size.width() - paddings);
+		const auto x = (size.width() - animated->width()) / 2;
+		const auto y = (size.height() - animated->height()) / 3;
+		const auto top = y + animated->height() + st::recentPeersEmptySkip;
+		const auto sub = std::max(top + label->height() - size.height(), 0);
+		animated->move(x, y - sub);
+		label->move((size.width() - label->width()) / 2, top - sub);
+	}, lifetime());
+
+	label->setClickHandlerFilter([=](
+			const ClickHandlerPtr &handler,
+			Qt::MouseButton) {
+		_handlerActivated.fire_copy(handler);
+		return false;
+	});
+
+	_animate = [animate] {
+		animate(anim::repeat::once);
+	};
+}
+
+void SearchEmpty::animate() {
+	if (const auto onstack = _animate) {
+		onstack();
+	}
+}
+
+} // namespace Dialogs