dannyplusplus12/pbl2

How dannyplusplus12/pbl2 works

This is a Qt 6 library-management desktop application. Staff use the dashboard for statistics and overdue borrowers, the borrow/return screen to manage customer loans, and management tabs to maintain books, authors, and genres. The GUI shares a Library business layer, which keeps in-memory records, applies loan and catalog rules, and persists data to text files. The sampled code confirms startup loading and management-page behavior; several screen-to-backend links are documented capabilities but their implementations were not shown, so those links are marked unverified.

Main entry points: Library.h Library Rules · MainWindow.cpp Main Window · ManagementPage.cpp Catalog Management · main.cpp Application Startup

Components 19

Application UI

Application Startup frontend/main.cpp
Main Window frontend/MainWindow.cpp
Dashboard frontend/DashboardPage.cpp
Borrow Return frontend/BorrowReturnPage.cpp
Borrow Cart frontend/BorrowCartDialog.cpp
Catalog Management frontend/ManagementPage.cpp
Book Entry frontend/BookEntryDialog.cpp
Name Entry frontend/NameDialog.cpp

Library Services

Library Rules backend/Library.h
Date Utilities backend/DateUtils.h
Collection Utilities backend/utils.h

Domain Records

Book Records models/Book.h
Loan Records models/Borrow.h
Customer Records models/Customer.h
Author Genre Records models/Author.h
Shared Entity models/Entity.h
Record Collections models/List.h

Local Persistence

Data Files Data

Other components

Library Staff

Connections 26

Library Staff → Main Window: uses README.md
Application Startup → Library Rules: loads data frontend/main.cpp
Application Startup → Library Rules: locks overdue frontend/main.cpp
Application Startup → Main Window: opens frontend/main.cpp
Main Window → Dashboard: shows frontend/MainWindow.cpp
Main Window → Borrow Return: shows frontend/MainWindow.cpp
Main Window → Catalog Management: shows frontend/MainWindow.cpp
Borrow Return → Borrow Cart: opens frontend/BorrowReturnPage.cpp
Catalog Management → Library Rules: queries and updates frontend/ManagementPage.cpp
Catalog Management → Book Entry: opens frontend/ManagementPage.cpp
Catalog Management → Name Entry: opens frontend/ManagementPage.cpp
Dashboard → Library Rules: reads statistics
Borrow Return → Library Rules: manages loans
Borrow Cart → Library Rules: submits loan actions
Book Entry → Library Rules: updates books
Library Rules → Date Utilities: uses dates backend/Library.h
Library Rules → Book Records: manages backend/Library.h
Library Rules → Loan Records: manages backend/Library.h
Library Rules → Customer Records: manages backend/Library.h
Library Rules → Author Genre Records: manages backend/Library.h
Library Rules → Data Files: reads and writes backend/Library.h
Book Records → Shared Entity: extends models/Book.h
Author Genre Records → Shared Entity: extends models/Author.h
Loan Records → Collection Utilities: uses parsing helpers models/Borrow.h
Book Records → Record Collections: stores genres in models/Book.h
Loan Records → Record Collections: loads as collection models/Borrow.h

Drawn by GitDiagram on November 12, 2026 from the repository's file tree, README and source files. Read as Markdown ·