QStandardItem

QStandardItem is a class in the Qt framework that represents an item in a model-view programming paradigm, specifically designed for use with item-based models like QStandardItemModel. It serves as a data container for individual elements within a hierarchical or tabular data structure. Each QStandardItem holds data for a specific role, such as display text, an icon, or tool tip, which the view then uses to render the item.

Key features of QStandardItem include its ability to store various types of data through its setData() and data() methods, allowing for rich item representations. It supports hierarchical relationships, enabling the creation of tree-like structures by allowing items to have parent and child relationships. QStandardItem also provides methods for manipulating its state, such as enabling or disabling it, setting checkable states, and setting editable properties. It's commonly used for simpler model implementations where the overhead of a custom model class is not necessary. Developers can subclass QStandardItem to add custom behavior or data storage beyond the standard roles. Its integration with QStandardItemModel simplifies the management of data for common use cases like file explorers, configuration dialogs, or simple lists.