Function GetOpenPath

Telegram/SourceFiles/core/file_utilities.cpp:203–235

namespace FileDialog {

void GetOpenPath(
		QPointer<QWidget> parent,
		const QString &caption,
		const QString &filter,
		Fn<void(OpenResult &&result)> callback,
		Fn<void()> failed) {
	InvokeQueued(QCoreApplication::instance(), [=] {
		auto files = QStringList();
		auto remoteContent = QByteArray();
		Ui::PreventDelayedActivation();
		const auto success = Platform::FileDialog::Get(
			parent,
			files,
			remoteContent,
			caption,
			filter,
			FileDialog::internal::Type::ReadFile);
		if (success
			&& ((!files.isEmpty() && !files[0].isEmpty())
				|| !remoteContent.isEmpty())) {
			if (callback) {
				auto result = OpenResult();
				if (!files.isEmpty() && !files[0].isEmpty()) {
					result.paths.push_back(files[0]);
				}
				result.remoteContent = remoteContent;
				callback(std::move(result));
			}
		} else if (failed) {
			failed();
		}
	});
}

void GetOpenPaths(
		QPointer<QWidget> parent,