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feat: Pagination/virtualization (fetchMore) for EmailListModel

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- EmailListModel: QAbstractListModel with canFetchMore/fetchMore
  * Batch loading (default 50 emails per fetch)
  * Total count query for scrollbar
  * TotalCountChanged signal
  * Paginated DB queries: findAllPaginated, findByFolderIdPaginated
  * Count queries: countAll, countByFolderId

- MailItemDao: new paginated methods
  * findAllPaginated(offset, limit, filters...)
  * findByFolderIdPaginated(folderId, offset, limit, filters...)
  * countAll(filters...), countByFolderId(folderId, filters...)

- MailListView: scroll-triggered fetchMore
  * Connects verticalScrollBar valueChanged on both TreeView and ListView
  * Triggers fetchMore at 90% scroll threshold
  * onRowsInserted updates EmailTreeModel when new emails arrive
  * Works in both normal (tree) and compact (list) views
This commit is contained in:
javier
2026-08-25 22:20:06 +02:00
parent 6e6fdf9c21
commit 68d237c873
77 changed files with 16718 additions and 18159 deletions
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src/db/dao/mailitemdao.h
+4
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@@ -33,4 +33,8 @@ public:
static bool replaceAttachments(qint64 mailItemId, const QVector<StoredAttachmentRecord>& attachments);
static QVector<StoredAttachmentRecord> attachmentsForMail(qint64 mailItemId);
static int countUnreadByFolderId(int folderId);
static int countAll(const QString& searchFilter, bool unreadOnly, bool flaggedOnly, bool hasAttachments);
static int countByFolderId(int folderId, const QString& searchFilter, bool unreadOnly, bool flaggedOnly, bool hasAttachments);
static QVector<MailItem> findAllPaginated(int offset, int limit, const QString& searchFilter, bool unreadOnly, bool flaggedOnly, bool hasAttachments);
static QVector<MailItem> findByFolderIdPaginated(int folderId, int offset, int limit, const QString& searchFilter, bool unreadOnly, bool flaggedOnly, bool hasAttachments);
};