Qt::UserRole
时间: 2023-09-23 14:06:06 浏览: 320
Qt::UserRole is a constant integer value defined in the Qt framework. It is used as a base role for user-defined data roles in item models.
In Qt's item models, data is stored in a table-like data structure, with rows and columns. Each cell in the table can hold data, and each cell is identified by a QModelIndex, which specifies its row and column. In addition to the row and column, a QModelIndex can also specify a data role, which identifies the type of data stored in the cell.
Some common data roles used in Qt's models include Qt::DisplayRole (for the data displayed to the user), Qt::EditRole (for the data displayed when the cell is being edited), and Qt::ToolTipRole (for the tooltip text displayed when the mouse hovers over the cell).
Qt::UserRole is a constant that can be used as a base role for user-defined data roles. For example, if you want to associate additional data with a cell in an item model, you can use a data role that is greater than or equal to Qt::UserRole. This ensures that the role you use does not conflict with any of the predefined roles used by Qt's models.
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