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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
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,bookIdEditChangeddropBookButtonClicked

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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