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PyQt5搭建图书馆管理系统（5）——添加/淘汰书籍对话框设计

分析：#

在图书管管理系统主页上，我们有添加和淘汰的功能 ，通过按钮弹出对话框进行添加和淘汰书籍，这里我们就来完成一下这两个功能。

添加图书功能#

添加图书，需要管理员添加以下信息

  • 书名
  • 书号
  • 作者名
  • 分类（分类已经规定，只需要选择对应的种类就可以了）
  • 出版社
  • 出版日期
  • 添加的数量

添加图书对话框代码#

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


class addBookDialog(QDialog):
    add_book_success_signal = pyqtSignal()

    def __init__(self, parent=None):
        super(addBookDialog, self).__init__(parent)
        self.setUpUI()
        self.setWindowModality(Qt.WindowModal)
        self.setWindowTitle("添加书籍")

    def setUpUI(self):
        # 书名，书号，作者，分类，添加数量.出版社,出版日期
        # 书籍分类：哲学类、社会科学类、政治类、法律类、军事类、经济类、文化类、教育类、体育类、语言文字类、艺术类、历史类、地理类、天文学类、生物学类、医学卫生类、农业类
        BookCategory = ["哲学", "社会科学", "政治", "法律", "军事", "经济", "文化", "教育", "体育", "语言文字", "艺术", "历史"
            , "地理", "天文学", "生物学", "医学卫生", "农业"]
        self.resize(300, 400)
        self.layout = QFormLayout()
        self.setLayout(self.layout)

        # Label控件
        self.titlelabel = QLabel("  添加书籍")
        self.bookNameLabel = QLabel("书    名:")
        self.bookIdLabel = QLabel("书    号:")
        self.authNameLabel = QLabel("作    者:")
        self.categoryLabel = QLabel("分    类:")
        self.publisherLabel = QLabel("出 版 社:")
        self.publishDateLabel = QLabel("出版日期:")
        self.addNumLabel = QLabel("数    量:")

        # button控件
        self.addBookButton = QPushButton("添 加")

        # lineEdit控件
        self.bookNameEdit = QLineEdit()
        self.bookIdEdit = QLineEdit()
        self.authNameEdit = QLineEdit()
        self.categoryComboBox = QComboBox()
        self.categoryComboBox.addItems(BookCategory)
        self.publisherEdit = QLineEdit()
        self.publishTime = QDateTimeEdit()
        self.publishTime.setDisplayFormat("yyyy-MM-dd")
        # self.publishDateEdit = QLineEdit()
        self.addNumEdit = QLineEdit()

        self.bookNameEdit.setMaxLength(10)
        self.bookIdEdit.setMaxLength(6)
        self.authNameEdit.setMaxLength(10)
        self.publisherEdit.setMaxLength(10)
        self.addNumEdit.setMaxLength(12)
        self.addNumEdit.setValidator(QIntValidator())

        # 添加进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.categoryComboBox)
        self.layout.addRow(self.publisherLabel, self.publisherEdit)
        self.layout.addRow(self.publishDateLabel, self.publishTime)
        self.layout.addRow(self.addNumLabel, self.addNumEdit)
        self.layout.addRow("", self.addBookButton)

        # 设置字体
        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.publishDateLabel.setFont(font)
        self.addNumLabel.setFont(font)

        self.bookNameEdit.setFont(font)
        self.bookIdEdit.setFont(font)
        self.authNameEdit.setFont(font)
        self.publisherEdit.setFont(font)
        self.publishTime.setFont(font)
        self.categoryComboBox.setFont(font)
        self.addNumEdit.setFont(font)

        # button设置
        font.setPixelSize(16)
        self.addBookButton.setFont(font)
        self.addBookButton.setFixedHeight(32)
        self.addBookButton.setFixedWidth(140)

        # 设置间距
        self.titlelabel.setMargin(8)
        self.layout.setVerticalSpacing(10)

        self.addBookButton.clicked.connect(self.addBookButtonCicked)

    def addBookButtonCicked(self):
        bookName = self.bookNameEdit.text()
        bookId = self.bookIdEdit.text()
        authName = self.authNameEdit.text()
        bookCategory = self.categoryComboBox.currentText()
        publisher = self.publisherEdit.text()
        publishTime = self.publishTime.text()
        addBookNum = self.addNumEdit.text()
        if (
                bookName == "" or bookId == "" or authName == "" or bookCategory == "" or publisher == "" or publishTime == "" or addBookNum == ""):
            print(QMessageBox.warning(self, "警告", "有字段为空，添加失败", QMessageBox.Yes, QMessageBox.Yes))
            return
        else:
            addBookNum = int(addBookNum)
            db = QSqlDatabase.addDatabase("QSQLITE")
            db.setDatabaseName('./db/LibraryManagement.db')
            db.open()
            query = QSqlQuery()
            # 如果已存在，则update Book表的现存量，剩余可借量，不存在，则insert Book表，同时insert buyordrop表
            sql = "SELECT * FROM Book WHERE BookId='%s'" % (bookId)
            query.exec_(sql)
            if (query.next()):
                sql = "UPDATE Book SET NumStorage=NumStorage+%d,NumCanBorrow=NumCanBorrow+%d WHERE BookId='%s'" % (
                    addBookNum, addBookNum, bookId)
            else:
                sql = "INSERT INTO book VALUES ('%s','%s','%s','%s','%s','%s',%d,%d,0)" % (
                    bookName, bookId, authName, bookCategory, publisher, publishTime, addBookNum, addBookNum)
            query.exec_(sql)
            db.commit()
            # 插入droporinsert表
            timenow = time.strftime('%Y-%m-%d', time.localtime(time.time()))
            sql = "INSERT INTO buyordrop VALUES ('%s','%s',1,%d)" % (bookId, timenow, addBookNum)
            query.exec_(sql)
            db.commit()
            print(QMessageBox.information(self, "提示", "添加书籍成功!", QMessageBox.Yes, QMessageBox.Yes))
            self.add_book_success_signal.emit()
            self.close()
            self.clearEdit()
        return

    def clearEdit(self):
        self.bookNameEdit.clear()
        self.bookIdEdit.clear()
        self.authNameEdit.clear()
        self.addNumEdit.clear()
        self.publisherEdit.clear()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    mainMindow = addBookDialog()
    mainMindow.show()
    sys.exit(app.exec_())

对于分类，使用了 QComboBox
对于时间，选择了QDateTimeEdit，并且规定了时间的格式
在setUpUI中可以看到，当点击添加图书按钮时addBookButtonClicked函数

addBookButtonClicked函数实现逻辑#

虽然我注释了，但是这里还是想重新写一下，逻辑如下

  • 如果存在有空值，警告
  • 添加的书已存在，就直接加上本数
  • 本来不存在，则开始插入数据

实现效果:#

这里写图片描述
这里写图片描述

淘汰图书功能#

分析#

从实现看与添加图书差不多，但是为了方便，我只允许管理员添加书本号，然后自动匹配到书籍信息填充，管理员只需再添加一个淘汰数量就行了

代码#

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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, parent=None):
        super(dropBookDialog, self).__init__(parent)
        self.setUpUI()
        self.setWindowModality(Qt.WindowModal)
        self.setWindowTitle("删除书籍")

    def setUpUI(self):
        # 书名，书号，作者，分类，添加数量.出版社,出版日期
        # 书籍分类：哲学类、社会科学类、政治类、法律类、军事类、经济类、文化类、教育类、体育类、语言文字类、艺术类、历史类、地理类、天文学类、生物学类、医学卫生类、农业类
        BookCategory = ["哲学", "社会科学", "政治", "法律", "军事", "经济", "文化", "教育", "体育", "语言文字", "艺术", "历史"
            , "地理", "天文学", "生物学", "医学卫生", "农业"]
        self.resize(300, 400)
        self.layout = QFormLayout()
        self.setLayout(self.layout)

        # Label控件
        self.titlelabel = QLabel("  淘汰书籍")
        self.bookNameLabel = QLabel("书    名:")
        self.bookIdLabel = QLabel("书    号:")
        self.authNameLabel = QLabel("作    者:")
        self.categoryLabel = QLabel("分    类:")
        self.publisherLabel = QLabel("出 版 社:")
        self.publishDateLabel = QLabel("出版日期:")
        self.dropNumLabel = QLabel("数    量:")

        # button控件
        self.dropBookButton = QPushButton("淘 汰")

        # lineEdit控件
        self.bookNameEdit = QLineEdit()
        self.bookIdEdit = QLineEdit()
        self.authNameEdit = QLineEdit()
        self.categoryComboBox = QComboBox()
        self.categoryComboBox.addItems(BookCategory)
        self.publisherEdit = QLineEdit()
        self.publishTime = QLineEdit()
        # self.publishDateEdit = QLineEdit()
        self.dropNumEdit = QLineEdit()

        self.bookNameEdit.setMaxLength(10)
        self.bookIdEdit.setMaxLength(6)
        self.authNameEdit.setMaxLength(10)
        self.publisherEdit.setMaxLength(10)
        self.dropNumEdit.setMaxLength(12)
        self.dropNumEdit.setValidator(QIntValidator())

        # 添加进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.categoryComboBox)
        self.layout.addRow(self.publisherLabel, self.publisherEdit)
        self.layout.addRow(self.publishDateLabel, self.publishTime)
        self.layout.addRow(self.dropNumLabel, self.dropNumEdit)
        self.layout.addRow("", self.dropBookButton)

        # 设置字体
        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.publishDateLabel.setFont(font)
        self.dropNumLabel.setFont(font)

        self.bookNameEdit.setFont(font)
        self.bookNameEdit.setReadOnly(True)
        self.bookNameEdit.setStyleSheet("background-color:#363636")
        self.bookIdEdit.setFont(font)
        self.authNameEdit.setFont(font)
        self.authNameEdit.setReadOnly(True)
        self.authNameEdit.setStyleSheet("background-color:#363636")
        self.publisherEdit.setFont(font)
        self.publisherEdit.setReadOnly(True)
        self.publisherEdit.setStyleSheet("background-color:#363636")
        self.publishTime.setFont(font)
        self.publishTime.setStyleSheet("background-color:#363636")
        self.categoryComboBox.setFont(font)
        self.categoryComboBox.setStyleSheet("background-color:#363636")
        self.dropNumEdit.setFont(font)

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

        # 设置间距
        self.titlelabel.setMargin(8)
        self.layout.setVerticalSpacing(10)

        self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
        self.bookIdEdit.textChanged.connect(self.bookIdEditChanged)

    def bookIdEditChanged(self):
        bookId = self.bookIdEdit.text()
        if (bookId == ""):
            self.bookNameEdit.clear()
            self.publisherEdit.clear()
            self.authNameEdit.clear()
            self.dropNumEdit.clear()
            self.publishTime.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)
        # 查询对应书号，如果存在就更新form
        if (query.next()):
            self.bookNameEdit.setText(query.value(0))
            self.authNameEdit.setText(query.value(2))
            self.categoryComboBox.setCurrentText(query.value(3))
            self.publisherEdit.setText(query.value(4))
            self.publishTime.setText(query.value(5))
        return

    def dropBookButtonClicked(self):
        bookId = self.bookIdEdit.text()
        dropNum = 0
        if (self.dropNumEdit.text() == ""):
            print(QMessageBox.warning(self, "警告", "淘汰数目为空，请检查输入，操作失败"), QMessageBox.Yes, QMessageBox.Yes)
            return
        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", "最多可淘汰%d本，请检查输入" % (query.value(7)), QMessageBox.Yes,
                                          QMessageBox.Yes))
                return
        # 更新Book表和BuyorDrop表
        # 如果drop书目和当前库存相同，则直接删除Book记录（这里先默认当前所有书都在库存中）
        if (dropNum == query.value(6)):
            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", "淘汰书籍成功!", QMessageBox.Yes, QMessageBox.Yes))
        self.drop_book_successful_signal.emit()
        self.close()
        return


if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon("./images/MainWindow_1.png"))
    app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
    mainMindow = dropBookDialog()
    mainMindow.show()
    sys.exit(app.exec_())

可以看到里面有两个函数，bookIdEditChanged和dropBookButtonClicked

其中bookIdEditChanged用来实现实时监测是否填充信息
dropBookButtonClicked实现点击淘汰的逻辑

当监测到书号的 QLineEdit被更改时触发bookIdEditChanged，从数据库检查是否存在该书，如果有则添加

实现效果#

这里写图片描述
这里写图片描述

最后附上链接#

项目地址：github仓库链接

#

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