init

Telegram/SourceFiles/info/media/info_media_empty_widget.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 "info/media/info_media_empty_widget.h"
+
+#include "ui/widgets/labels.h"
+#include "styles/style_info.h"
+#include "lang/lang_keys.h"
+
+namespace Info {
+namespace Media {
+
+EmptyWidget::EmptyWidget(QWidget *parent)
+: RpWidget(parent)
+, _text(this, st::infoEmptyLabel) {
+}
+
+void EmptyWidget::setFullHeight(rpl::producer<int> fullHeightValue) {
+	std::move(
+		fullHeightValue
+	) | rpl::on_next([this](int fullHeight) {
+		// Make icon center be on 1/3 height.
+		auto iconCenter = fullHeight / 3;
+		auto iconHeight = st::infoEmptyFile.height();
+		auto iconTop = iconCenter - iconHeight / 2;
+		_height = iconTop + st::infoEmptyIconTop;
+		resizeToWidth(width());
+	}, lifetime());
+}
+
+void EmptyWidget::setType(Type type) {
+	_type = type;
+	_icon = [&] {
+		switch (_type) {
+		case Type::Photo:
+		case Type::GIF: return &st::infoEmptyPhoto;
+		case Type::Video: return &st::infoEmptyVideo;
+		case Type::MusicFile: return &st::infoEmptyAudio;
+		case Type::File: return &st::infoEmptyFile;
+		case Type::Link: return &st::infoEmptyLink;
+		case Type::RoundVoiceFile: return &st::infoEmptyVoice;
+		}
+		Unexpected("Bad type in EmptyWidget::setType()");
+	}();
+	update();
+}
+
+void EmptyWidget::setSearchQuery(const QString &query) {
+	_text->setText([&] {
+		switch (_type) {
+		case Type::Photo:
+			return tr::lng_media_photo_empty(tr::now);
+		case Type::GIF:
+			return tr::lng_media_gif_empty(tr::now);
+		case Type::Video:
+			return tr::lng_media_video_empty(tr::now);
+		case Type::MusicFile:
+			return query.isEmpty()
+				? tr::lng_media_song_empty(tr::now)
+				: tr::lng_media_song_empty_search(tr::now);
+		case Type::File:
+			return query.isEmpty()
+				? tr::lng_media_file_empty(tr::now)
+				: tr::lng_media_file_empty_search(tr::now);
+		case Type::Link:
+			return query.isEmpty()
+				? tr::lng_media_link_empty(tr::now)
+				: tr::lng_media_link_empty_search(tr::now);
+		case Type::RoundVoiceFile:
+			return tr::lng_media_audio_empty(tr::now);
+		}
+		Unexpected("Bad type in EmptyWidget::setSearchQuery()");
+	}());
+	resizeToWidth(width());
+}
+
+void EmptyWidget::paintEvent(QPaintEvent *e) {
+	if (!_icon) {
+		return;
+	}
+
+	auto p = QPainter(this);
+
+	auto iconLeft = (width() - _icon->width()) / 2;
+	auto iconTop = height() - st::infoEmptyIconTop;
+	_icon->paint(p, iconLeft, iconTop, width());
+}
+
+int EmptyWidget::resizeGetHeight(int newWidth) {
+	auto labelTop = _height - st::infoEmptyLabelTop;
+	auto labelWidth = newWidth - 2 * st::infoEmptyLabelSkip;
+	_text->resizeToNaturalWidth(labelWidth);
+
+	auto labelLeft = (newWidth - _text->width()) / 2;
+	_text->moveToLeft(labelLeft, labelTop, newWidth);
+
+	update();
+	return _height;
+}
+
+} // namespace Media
+} // namespace Info