QRangeModel::ItemAccess Struct
template <typename T> struct QRangeModel::ItemAccessItemAccess 模板提供了一个自定义点，用于控制QRangeModel 如何访问单个项目的角色数据。更多
此结构在 Qt 6.11 中引入。
详细说明
为您的数据结构中使用的类型专用此模板，并实现readRole() 和writeRole() 成员，以访问您的类型的特定角色数据。
template <> struct QRangeModel::ItemAccess<ItemType> { static QVariant readRole(const ItemType &item, int role) { switch (role) { // ... } return {}; } static bool writeRole(ItemType &item, const QVariant &data, int role) { bool ok = false; switch (role) { // ... } return ok; } };
该类型的专用化将优先于任何预定义行为。请勿为您不拥有的类型专用此模板。对 ItemAccess 进行专门化的类型会被隐式地解释为multi-role items 。
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