pyqt5圖書管理系統--4、管理員頁面設計之淘汰書籍

阿新 • • 發佈：2022-12-12

本節分為兩個部分：管理員介面設計、淘汰書籍介面設計。

主要流程：1、通過進入管理員介面，點選淘汰書籍按鈕，轉到淘汰書籍介面。

2、連線資料庫，進行邏輯輸入。

3、淘汰書籍時，輸入書號，返回顯示的書籍對應資訊。

4、點選淘汰按鈕，對書籍所存在的可刪除數量進行相應提示。

一、管理員介面

新新增模組：

from dropBookDialog import dropBookDialog

匯入dropBookDialog模組
呼叫淘汰書籍模組

    self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
    def dropBookButtonClicked(self):
        dropDialog = dropBookDialog()
        dropDialog.show()
        dropDialog.exec_()

二、淘汰書籍介面

模組匯入

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import qdarkstyle
from PyQt5.QtSql import *
import time

（一）類基礎設定

class dropBookDialog(QDialog):
    # 用於接收訊號
    drop_book_successful_signal = pyqtSignal()

    def __init__(self):
        super(dropBookDialog, self).__init__()
        self.setWindowModality(Qt.WindowModal)
        self.setWindowTitle("刪除書籍")
        self.setUpUI()

（二）淘汰介面設計

1、頁面大小布局

def setUpUI(self):

    self.resize(300, 400)
    self.layout = QFormLayout()
    self.setLayout(self.layout)

2、新增標籤及大小

（1）新增書籍標籤

# Label標籤控制元件
self.titleLabel = QLabel(" 淘汰書籍")
self.bookNameLabel = QLabel("書 名:")
self.bookIdLabel = QLabel("書 號:")
self.authNameLabel = QLabel("作 者:")
self.categoryLabel = QLabel("分 類:")
self.publisherLabel = QLabel("出 版 社:")
self.publisherDateLabel = QLabel("出版日期:")
self.dropNumLabel = QLabel("數 量:")

# button控制元件
self.dropBookButton = QPushButton("淘汰")

（2）設定書籍標籤字型的大小

# 設定字型
font = QFont()
font.setPixelSize(20)
self.titleLabel.setFont(font)
font.setPixelSize(14)
self.bookNameLabel.setFont(font)
self.bookIdLabel.setFont(font)
self.authNameLabel.setFont(font)
self.categoryLabel.setFont(font)
self.publisherLabel.setFont(font)
self.publisherDateLabel.setFont(font)
self.dropNumLabel.setFont(font)

（3）設定按鈕大小

# 設定button
font.setPixelSize(16)
self.dropBookButton.setFont(font)
self.dropBookButton.setFixedHeight(32)
self.dropBookButton.setFixedWidth(140)

3、輸入框設定

（1）新增輸入框

分類輸入框的型別為：選項輸入框型別

  BookCategory = ["哲學","教育","生物學","社會科學","政治", "法律","軍事","經濟","文化","體育","語言文字","地理","天文學","醫療衛生","農業"]

self.bookNameEdit = QLineEdit()
self.bookIdEdit = QLineEdit()
self.authNameEdit = QLineEdit()
# 分類建立的QComboBox，儲存整個分類的列表
# QComboBox 以佔用最少螢幕控制元件的方式向用戶呈現選項列表的方法
self.categoryEdit = QComboBox()
self.categoryEdit.addItems(BookCategory)
self.publisherEdit = QLineEdit()

# QDateTimeEdit時間控制元件
# setDisplayFormat 設定顯示的格式 yyyy-MM-dd 年-月-日
self.publishTime = QLineEdit()
# self.publishTime.setDisplayFormat("yyyy-MM-dd")
self.dropNumEdit = QLineEdit()

（2）設定輸入框可輸入的長度

# 限制輸入的長度
self.bookNameEdit.setMaxLength(10)
self.bookIdEdit.setMaxLength(6)
self.authNameEdit.setMaxLength(10)
self.publisherEdit.setMaxLength(10)
self.dropNumEdit.setMaxLength(12)
# 設定輸入框內為整數
self.dropNumEdit.setValidator(QIntValidator())

（3）設定輸入框的字型、背景、可輸入方式

font.setPixelSize(18)
self.bookNameEdit.setFont(font)
# 只能讀取
self.bookNameEdit.setReadOnly(True)
# 設定Qt的css程式碼,修改控制元件的背景顏色
self.bookNameEdit.setStyleSheet("background-color:grey")

self.bookIdEdit.setFont(font)
self.authNameEdit.setFont(font)
self.authNameEdit.setReadOnly(True)
self.authNameEdit.setStyleSheet("background-color:grey")

self.publisherEdit.setFont(font)
self.publisherEdit.setReadOnly(True)
self.publisherEdit.setStyleSheet("background-color:grey")

self.publishTime.setFont(font)
self.publishTime.setReadOnly(True)
self.publishTime.setStyleSheet("background-color:grey")

self.categoryEdit.setFont(font)
# self.categoryEdit.setReadOnly(True)
self.categoryEdit.setStyleSheet("background-color:grey")

self.dropNumEdit.setFont(font)

4、設定標籤的間距

# 設定間距
self.titleLabel.setMargin(8)
# 垂直佈局上下行之間的間距
self.layout.setVerticalSpacing(10)

5、表單佈局

# 新增進Formlayout
self.layout.addRow("", self.titleLabel)
self.layout.addRow(self.bookNameLabel, self.bookNameEdit)
self.layout.addRow(self.bookIdLabel, self.bookIdEdit)
self.layout.addRow(self.authNameLabel, self.authNameEdit)
self.layout.addRow(self.categoryLabel, self.categoryEdit)
self.layout.addRow(self.publisherLabel, self.publisherEdit)
self.layout.addRow(self.publisherDateLabel, self.publishTime)
self.layout.addRow(self.dropNumLabel, self.dropNumEdit)
self.layout.addRow("", self.dropBookButton)

（三）訊號傳遞

1、訊號一

通過書號id查詢書籍相應資訊。

self.bookIdEdit.textChanged.connect(self.bookIdEditChange)

（1）書號輸入框id接收訊號，呼叫查詢書號id的函式。

def bookIdEditChange(self):
    bookID = self.bookIdEdit.text()
    # 檢測書號id是否為空，若為空則清楚所有輸入框資訊
    if bookID == "":
        self.bookNameEdit.clear()
        self.authNameEdit.clear()
        self.publisherEdit.clear()
        self.publishTime.clear()
        self.dropNumEdit.clear()

（2）開啟資料庫，查詢對應書號

db = QSqlDatabase.addDatabase("QSQLITE")
db.setDatabaseName("./db/LibraryManagement.db")
db.open()
query = QSqlQuery()
sql = "select * from Book where BookId='%s'" % (bookID)
query.exec_(sql)

（3）如果存在就更新輸入框資料

# 查詢對應書號,如果存在就更新form

if query.next():
    self.bookNameEdit.setText(query.value(0))
    self.authNameEdit.setText(query.value(2))
    self.categoryEdit.setCurrentText(query.value(3))
    self.publisherEdit.setText(query.value(4))
    self.publishTime.setText(query.value(5))

return

2、訊號二

通過淘汰按鈕，刪除書籍。

self.dropBookButton.clicked.connect(self.dropBookButtonClicked)

（1）淘汰按鈕接收訊號，觸發淘汰按鈕函式。

# 點選淘汰觸發刪除事件
def dropBookButtonClicked(self):
    # 獲取書號資訊
    bookId = self.bookIdEdit.text()

    # 若刪除書籍數量輸入框為空，則進行提示
    if self.dropNumEdit.text() == "":
        print(QMessageBox.warning(self, "警告", "淘汰數目為空, 請檢查輸入，操作失敗"), QMessageBox.Yes, QMessageBox.Yes)

（2）連線資料庫

# 將刪除書籍輸入框內的資料型別轉化為整數型
dropNum =  int(self.dropNumEdit.text())
# 連線資料庫
db = QSqlDatabase.addDatabase("QSQLITE")
db.setDatabaseName("./db/LibraryManagement.db")
db.open()
query = QSqlQuery()
# 查詢書籍書號
sql = "select * from Book where BookId='%s'" % (bookId)
query.exec_(sql)

（3）邏輯判斷

# 若書號存在，執行if函式內語句
if query.next():
    # 若刪除書籍數量大於可借閱存在的數量，或輸出數量小於0，進行彈窗提示。
    if (dropNum > query.value(7) or dropNum < 0):
        print(QMessageBox.warning(self, "警告", f"最多可淘汰{query.value(7)}本, 請檢查輸入!"),QMessageBox.Yes, QMessageBox.Yes)
        return
    # 如果drop數目與當前庫存相同，則直接刪除Book記錄(這裡預設當前所有書都在庫存中)
if dropNum == query.value(7):
    sql = "delete from Book where BookId='%s'" %(bookId)

else:
    sql = "update Book set NumStorage=NumStorage-%d, NumCanBorrow=NumCanBorrow-%d where BookId='%s'" % (dropNum, dropNum, bookId)
query.exec_(sql)
db.commit()

（4）新增書籍處理資訊表資訊

刪除的同時在書籍處理資訊表中，新增處理書籍的書號、處理時的時間、處理的數量。
刪除成功後進行訊息框提示。

timenow = time.strftime("%Y-%m-%d", time.localtime(time.time()))
sql = "insert into BuyorDrop values ('%s', '%s', 0, %d)" %(bookId, timenow, dropNum)
query.exec_(sql)
db.commit()
print(QMessageBox.information(self, "提示", "淘汰書籍成功", QMessageBox.Yes, QMessageBox.Yes))
# 訊號傳遞
self.drop_book_successful_signal.emit()
self.close()
return

（四）程式入口

if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon('./iron-man.png'))
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    dr = dropBookDialog()
    dr.show()
    sys.exit(app.exec_())

三、完整程式碼

（一）管理員介面完整程式碼

import sys
from PyQt5.QtWidgets import *
import qdarkstyle
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtSql import *
from addBookDialog import addBookDialog
from dropBookDialog import dropBookDialog
class AdminHome(QWidget):
    def __init__(self):
        super(AdminHome, self).__init__()
        self.setUpUi()

    def setUpUi(self):
        self.resize(900,600)
        self.setWindowTitle("歡迎進入管理員主頁")
        self.layout = QHBoxLayout()
        self.buttonlayout = QVBoxLayout()
        self.setLayout(self.layout)

        font = QFont()
        font.setPixelSize(16)

        self.userManageButton = QPushButton("使用者管理")
        self.addBookButton = QPushButton("新增書籍")
        self.dropBookButton = QPushButton("淘汰書籍")

        self.userManageButton.setFont(font)
        self.addBookButton.setFont(font)
        self.dropBookButton.setFont(font)

        self.userManageButton.setFixedWidth(100)
        self.userManageButton.setFixedHeight(42)
        self.addBookButton.setFixedWidth(100)
        self.addBookButton.setFixedHeight(42)
        self.dropBookButton.setFixedWidth(100)
        self.dropBookButton.setFixedHeight(42)
        # 將三個按鈕新增到垂直佈局中
        self.buttonlayout.addWidget(self.addBookButton)
        self.buttonlayout.addWidget(self.userManageButton)
        self.buttonlayout.addWidget(self.dropBookButton)
        # 將按鈕佈局新增到垂直佈局中
        self.layout.addLayout(self.buttonlayout)

        self.addBookButton.clicked.connect(self.addBookButtonClicked)
        self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
    def addBookButtonClicked(self):
        addDialog = addBookDialog()
        addDialog.show()
        addDialog.exec_()
    def dropBookButtonClicked(self):
        dropDialog = dropBookDialog()
        dropDialog.show()
        dropDialog.exec_()
if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    app.setWindowIcon(QIcon('./iron-man.png'))
    mianMindow = AdminHome()
    mianMindow.show()
    sys.exit(app.exec_())

（二）淘汰書籍介面完整程式碼

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import qdarkstyle
from PyQt5.QtSql import *
import time


class dropBookDialog(QDialog):
    drop_book_successful_signal = pyqtSignal()

    def __init__(self):
        super(dropBookDialog, self).__init__()
        self.setWindowModality(Qt.WindowModal)
        self.setWindowTitle("刪除書籍")
        self.setUpUI()

    def setUpUI(self):
        BookCategory = ["哲學", "教育", "生物學", "社會科學", "政治",
                        "法律", "軍事", "經濟", "文化", "體育", "語言文字", "地理", "天文學", "醫學衛生", "農業"]

        self.resize(300, 400)
        self.layout = QFormLayout()
        self.setLayout(self.layout)

        # Label標籤控制元件
        self.titleLabel = QLabel(" 淘汰書籍")
        self.bookNameLabel = QLabel("書 名:")
        self.bookIdLabel = QLabel("書 號:")
        self.authNameLabel = QLabel("作 者:")
        self.categoryLabel = QLabel("分 類:")
        self.publisherLabel = QLabel("出 版 社:")
        self.publisherDateLabel = QLabel("出版日期:")
        self.dropNumLabel = QLabel("數 量:")

        # button控制元件
        self.dropBookButton = QPushButton("淘汰")

        # lineEdit控制元件
        self.bookNameEdit = QLineEdit()
        self.bookIdEdit = QLineEdit()
        self.authNameEdit = QLineEdit()
        # 分類建立的QComboBox，儲存整個分類的列表
        # QComboBox 以佔用最少螢幕控制元件的方式向用戶呈現選項列表的方法
        self.categoryEdit = QComboBox()
        self.categoryEdit.addItems(BookCategory)
        self.publisherEdit = QLineEdit()

        # QDateTimeEdit時間控制元件
        # setDisplayFormat 設定顯示的格式 yyyy-MM-dd 年-月-日
        self.publishTime = QLineEdit()
        # self.publishTime.setDisplayFormat("yyyy-MM-dd")
        self.dropNumEdit = QLineEdit()

        # 限制輸入的長度
        self.bookNameEdit.setMaxLength(10)
        self.bookIdEdit.setMaxLength(6)
        self.authNameEdit.setMaxLength(10)
        self.publisherEdit.setMaxLength(10)
        self.dropNumEdit.setMaxLength(12)
        # 設定輸入框內為整數
        self.dropNumEdit.setValidator(QIntValidator())

        # 新增進Formlayout
        self.layout.addRow("", self.titleLabel)
        self.layout.addRow(self.bookNameLabel, self.bookNameEdit)
        self.layout.addRow(self.bookIdLabel, self.bookIdEdit)
        self.layout.addRow(self.authNameLabel, self.authNameEdit)
        self.layout.addRow(self.categoryLabel, self.categoryEdit)
        self.layout.addRow(self.publisherLabel, self.publisherEdit)
        self.layout.addRow(self.publisherDateLabel, self.publishTime)
        self.layout.addRow(self.dropNumLabel, self.dropNumEdit)
        self.layout.addRow("", self.dropBookButton)

        # 設定字型
        font = QFont()
        font.setPixelSize(20)
        self.titleLabel.setFont(font)
        font.setPixelSize(14)
        self.bookNameLabel.setFont(font)
        self.bookIdLabel.setFont(font)
        self.authNameLabel.setFont(font)
        self.categoryLabel.setFont(font)
        self.publisherLabel.setFont(font)
        self.publisherDateLabel.setFont(font)
        self.dropNumLabel.setFont(font)

        font.setPixelSize(18)
        self.bookNameEdit.setFont(font)
        # 只能讀取
        self.bookNameEdit.setReadOnly(True)
        self.bookNameEdit.setStyleSheet("background-color:grey")

        # 通過輸入ID返回其餘的所有資訊
        self.bookIdEdit.setFont(font)
        # 設定Qt的css程式碼,修改控制元件的背景顏色
        self.authNameEdit.setFont(font)
        self.authNameEdit.setReadOnly(True)
        self.authNameEdit.setStyleSheet("background-color:grey")

        self.publisherEdit.setFont(font)
        self.publisherEdit.setReadOnly(True)
        self.publisherEdit.setStyleSheet("background-color:grey")

        self.publishTime.setFont(font)
        self.publishTime.setReadOnly(True)
        self.publishTime.setStyleSheet("background-color:grey")

        self.categoryEdit.setFont(font)
        # self.categoryEdit.setReadOnly(True)
        self.categoryEdit.setStyleSheet("background-color:grey")

        self.dropNumEdit.setFont(font)

        # 設定button
        font.setPixelSize(16)
        self.dropBookButton.setFont(font)
        self.dropBookButton.setFixedHeight(32)
        self.dropBookButton.setFixedWidth(140)

        # 設定間距
        self.titleLabel.setMargin(8)
        # 垂直佈局上下行之間的間距
        self.layout.setVerticalSpacing(10)

        # 觸發id，讀取其他所有內容
        self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
        self.bookIdEdit.textChanged.connect(self.bookIdEditChange)
    def bookIdEditChange(self):
        bookID = self.bookIdEdit.text()
        if bookID == "":
            self.bookNameEdit.clear()
            self.authNameEdit.clear()
            self.publisherEdit.clear()
            self.publishTime.clear()
            self.dropNumEdit.clear()
        db = QSqlDatabase.addDatabase("QSQLITE")
        db.setDatabaseName("./db/LibraryManagement.db")
        db.open()
        query = QSqlQuery()
        sql = "select * from Book where BookId='%s'" % (bookID)
        query.exec_(sql)

        # 查詢對應書號,如果存在就更新form

        if query.next():
            self.bookNameEdit.setText(query.value(0))
            self.authNameEdit.setText(query.value(2))
            self.categoryEdit.setCurrentText(query.value(3))
            self.publisherEdit.setText(query.value(4))
            self.publishTime.setText(query.value(5))

        return

    # 點選淘汰觸發刪除事件
    def dropBookButtonClicked(self):
        bookId = self.bookIdEdit.text()
        dropNum = 0
        if self.dropNumEdit.text() == "":
            print(QMessageBox.warning(self, "警告", "淘汰數目為空, 請檢查輸入，操作失敗"), QMessageBox.Yes, QMessageBox.Yes)


        dropNum =  int(self.dropNumEdit.text())

        db = QSqlDatabase.addDatabase("QSQLITE")
        db.setDatabaseName("./db/LibraryManagement.db")
        db.open()
        query = QSqlQuery()
        sql = "select * from Book where BookId='%s'" % (bookId)
        query.exec_(sql)

        if query.next():
            if (dropNum > query.value(7) or dropNum < 0):
                print(QMessageBox.warning(self, "警告", f"最多可淘汰{query.value(7)}本, 請檢查輸入!"),QMessageBox.Yes, QMessageBox.Yes)
                return
            # 如果drop數目與當前庫存相同，則直接刪除Book記錄(這裡預設當前所有書都在庫存中)
        if dropNum == query.value(7):
            sql = "delete from Book where BookId='%s'" %(bookId)
        else:
            sql = "update Book set NumStorage=NumStorage-%d, NumCanBorrow=NumCanBorrow-%d where BookId='%s'" % (dropNum, dropNum, bookId)
        query.exec_(sql)
        db.commit()

        timenow = time.strftime("%Y-%m-%d", time.localtime(time.time()))
        sql = "insert into BuyorDrop values ('%s', '%s', 0, %d)" %(bookId, timenow, dropNum)
        query.exec_(sql)
        db.commit()
        print(QMessageBox.information(self, "提示", "淘汰書籍成功", QMessageBox.Yes, QMessageBox.Yes))
        self.drop_book_successful_signal.emit()
        self.close()
        return


if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon('./iron-man.png'))
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    dr = dropBookDialog()
    dr.show()
    sys.exit(app.exec_())