QDir

QDir is a class in the Qt framework that provides access to directory structures and their contents. It is part of the Qt Core module and represents a directory path, offering methods to navigate, query, create, and remove directories, as well as to list and filter their entries. QDir handles path normalization and platform-specific separators, and works with both absolute and relative paths.

Key capabilities include obtaining common directory paths and current locations through static helpers such as currentPath, homePath, rootPath, and tempPath. It can report or modify the current working directory and can be used with relative paths. For content listing, QDir supplies methods like entryList and entryInfoList, which return either file names or detailed file information. These listings accept filters (QDir::Filters) to include or exclude directories, files, and special entries, and sort flags (QDir::SortFlags) to order results by name, size, date, or type. For efficient traversal, a QDirIterator can be employed to stream directory entries.

For modification, QDir supports creating directories with mkpath (and mkdir for single-level creation) and removing directories with rmpath. It integrates with other Qt I/O classes such as QFile and QFileInfo, enabling cohesive filesystem interactions across applications. Overall, QDir provides a cross-platform, object-oriented interface for directory management that is widely used in Qt applications to abstract filesystem details.