本节分为两个部分:管理员界面设计、淘汰书籍界面设计。
主要流程:1、通过进入管理员界面,点击淘汰书籍按钮,转到淘汰书籍界面。
2、连接数据库,进行逻辑输入。
3、淘汰书籍时,输入书号,返回显示的书籍对应信息。
4、点击淘汰按钮,对书籍所存在的可删除数量进行相应提示。
一、管理员界面
- 新添加模块:
from dropBookDialog import dropBookDialog
- 导入dropBookDialog模块
- 调用淘汰书籍模块
self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
def dropBookButtonClicked(self):
dropDialog = dropBookDialog()
dropDialog.show()
dropDialog.exec_()
二、淘汰书籍界面
- 模块导入
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import qdarkstyle
from PyQt5.QtSql import *
import time
(一)类基础设置
class dropBookDialog(QDialog):
# 用于接收信号
drop_book_successful_signal = pyqtSignal()
def __init__(self):
super(dropBookDialog, self).__init__()
self.setWindowModality(Qt.WindowModal)
self.setWindowTitle("删除书籍")
self.setUpUI()
(二)淘汰界面设计
1、页面大小布局
def setUpUI(self):
self.resize(300, 400)
self.layout = QFormLayout()
self.setLayout(self.layout)
2、添加标签及大小
(1)添加书籍标签
# Label标签控件
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.publisherDateLabel = QLabel("出版日期:")
self.dropNumLabel = QLabel("数 量:")
# button控件
self.dropBookButton = QPushButton("淘汰")
(2)设置书籍标签字体的大小
# 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.publisherDateLabel.setFont(font)
self.dropNumLabel.setFont(font)
(3)设置按钮大小
# 设置button
font.setPixelSize(16)
self.dropBookButton.setFont(font)
self.dropBookButton.setFixedHeight(32)
self.dropBookButton.setFixedWidth(140)
3、输入框设置
(1)添加输入框
- 分类输入框的类型为:选项输入框类型
BookCategory = ["哲学","教育","生物学","社会科学","政治", "法律","军事","经济","文化","体育","语言文字","地理","天文学","医疗卫生","农业"]
self.bookNameEdit = QLineEdit()
self.bookIdEdit = QLineEdit()
self.authNameEdit = QLineEdit()
# 分类创建的QComboBox,存储整个分类的列表
# QComboBox 以占用最少屏幕控件的方式向用户呈现选项列表的方法
self.categoryEdit = QComboBox()
self.categoryEdit.addItems(BookCategory)
self.publisherEdit = QLineEdit()
# QDateTimeEdit时间控件
# setDisplayFormat 设置显示的格式 yyyy-MM-dd 年-月-日
self.publishTime = QLineEdit()
# self.publishTime.setDisplayFormat("yyyy-MM-dd")
self.dropNumEdit = QLineEdit()
(2)设置输入框可输入的长度
# 限制输入的长度
self.bookNameEdit.setMaxLength(10)
self.bookIdEdit.setMaxLength(6)
self.authNameEdit.setMaxLength(10)
self.publisherEdit.setMaxLength(10)
self.dropNumEdit.setMaxLength(12)
# 设置输入框内为整数
self.dropNumEdit.setValidator(QIntValidator())
(3)设置输入框的字体、背景、可输入方式
font.setPixelSize(18)
self.bookNameEdit.setFont(font)
# 只能读取
self.bookNameEdit.setReadOnly(True)
# 设置Qt的css代码,修改控件的背景颜色
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、设置标签的间距
# 设置间距
self.titleLabel.setMargin(8)
# 垂直布局上下行之间的间距
self.layout.setVerticalSpacing(10)
5、表单布局
# 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.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)信号传递
1、信号一
- 通过书号id查询书籍相应信息。
self.bookIdEdit.textChanged.connect(self.bookIdEditChange)
(1)书号输入框id接收信号,调用查询书号id的函数。
def bookIdEditChange(self):
bookID = self.bookIdEdit.text()
# 检测书号id是否为空,若为空则清楚所有输入框信息
if bookID == "":
self.bookNameEdit.clear()
self.authNameEdit.clear()
self.publisherEdit.clear()
self.publishTime.clear()
self.dropNumEdit.clear()
(2)打开数据库,查询对应书号
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)如果存在就更新输入框数据
# 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.categoryEdit.setCurrentText(query.value(3))
self.publisherEdit.setText(query.value(4))
self.publishTime.setText(query.value(5))
return
2、信号二
- 通过淘汰按钮,删除书籍。
self.dropBookButton.clicked.connect(self.dropBookButtonClicked)
(1)淘汰按钮接收信号,触发淘汰按钮函数。
# 点击淘汰触发删除事件
def dropBookButtonClicked(self):
# 获取书号信息
bookId = self.bookIdEdit.text()
# 若删除书籍数量输入框为空,则进行提示
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)
(2)连接数据库
# 将删除书籍输入框内的数据类型转化为整数型
dropNum = int(self.dropNumEdit.text())
# 连接数据库
db = QSqlDatabase.addDatabase("QSQLITE")
db.setDatabaseName("./db/LibraryManagement.db")
db.open()
query = QSqlQuery()
# 查询书籍书号
sql = "select * from Book where BookId='%s'" % (bookId)
query.exec_(sql)
(3)逻辑判断
# 若书号存在,执行if函数内语句
if query.next():
# 若删除书籍数量大于可借阅存在的数量,或输出数量小于0,进行弹窗提示。
if (dropNum > query.value(7) or dropNum < 0):
print(QMessageBox.warning(self, "警告", f"最多可淘汰{query.value(7)}本, 请检查输入!"),QMessageBox.Yes, QMessageBox.Yes)
return
# 如果drop数目与当前库存相同,则直接删除Book记录(这里默认当前所有书都在库存中)
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)添加书籍处理信息表信息
- 删除的同时在书籍处理信息表中,添加处理书籍的书号、处理时的时间、处理的数量 。
- 删除成功后进行消息框提示。
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", "淘汰书籍成功", QMessageBox.Yes, QMessageBox.Yes))
# 信号传递
self.drop_book_successful_signal.emit()
self.close()
return
(四)程序入口
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、完整代码
(一)管理员界面完整代码
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("欢迎进入管理员主页")
self.layout = QHBoxLayout()
self.buttonlayout = QVBoxLayout()
self.setLayout(self.layout)
font = QFont()
font.setPixelSize(16)
self.userManageButton = QPushButton("用户管理")
self.addBookButton = QPushButton("添加书籍")
self.dropBookButton = QPushButton("淘汰书籍")
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)
# 将三个按钮添加到垂直布局中
self.buttonlayout.addWidget(self.addBookButton)
self.buttonlayout.addWidget(self.userManageButton)
self.buttonlayout.addWidget(self.dropBookButton)
# 将按钮布局添加到垂直布局中
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)淘汰书籍界面完整代码
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("删除书籍")
self.setUpUI()
def setUpUI(self):
BookCategory = ["哲学", "教育", "生物学", "社会科学", "政治",
"法律", "军事", "经济", "文化", "体育", "语言文字", "地理", "天文学", "医学卫生", "农业"]
self.resize(300, 400)
self.layout = QFormLayout()
self.setLayout(self.layout)
# Label标签控件
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.publisherDateLabel = 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()
# 分类创建的QComboBox,存储整个分类的列表
# QComboBox 以占用最少屏幕控件的方式向用户呈现选项列表的方法
self.categoryEdit = QComboBox()
self.categoryEdit.addItems(BookCategory)
self.publisherEdit = QLineEdit()
# QDateTimeEdit时间控件
# setDisplayFormat 设置显示的格式 yyyy-MM-dd 年-月-日
self.publishTime = QLineEdit()
# self.publishTime.setDisplayFormat("yyyy-MM-dd")
self.dropNumEdit = QLineEdit()
# 限制输入的长度
self.bookNameEdit.setMaxLength(10)
self.bookIdEdit.setMaxLength(6)
self.authNameEdit.setMaxLength(10)
self.publisherEdit.setMaxLength(10)
self.dropNumEdit.setMaxLength(12)
# 设置输入框内为整数
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.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)
# 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.publisherDateLabel.setFont(font)
self.dropNumLabel.setFont(font)
font.setPixelSize(18)
self.bookNameEdit.setFont(font)
# 只能读取
self.bookNameEdit.setReadOnly(True)
self.bookNameEdit.setStyleSheet("background-color:grey")
# 通过输入ID返回其余的所有信息
self.bookIdEdit.setFont(font)
# 设置Qt的css代码,修改控件的背景颜色
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)
# 设置button
font.setPixelSize(16)
self.dropBookButton.setFont(font)
self.dropBookButton.setFixedHeight(32)
self.dropBookButton.setFixedWidth(140)
# 设置间距
self.titleLabel.setMargin(8)
# 垂直布局上下行之间的间距
self.layout.setVerticalSpacing(10)
# 触发id,读取其他所有内容
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.categoryEdit.setCurrentText(query.value(3))
self.publisherEdit.setText(query.value(4))
self.publishTime.setText(query.value(5))
return
# 点击淘汰触发删除事件
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)
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, 请检查输入!"),QMessageBox.Yes, QMessageBox.Yes)
return
# 如果drop数目与当前库存相同,则直接删除Book记录(这里默认当前所有书都在库存中)
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('./iron-man.png'))
app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
dr = dropBookDialog()
dr.show()
sys.exit(app.exec_())
四、效果展示
(一)管理员界面效果展示
- 管理员主界面
- 点击淘汰书籍显示淘汰书籍窗口
(二)淘汰书籍界面效果展示
- 不输入消息提示
- 查询书号界面效果
- 删除数量大于库存量消息提示
- 删除书籍成功消息提示
(三)数据库效果展示
- 未找到书号为IS1000的书籍,删除成功!
- 书籍信息处理记录表信息记录成功
待后续更新....
标签:layout,--,self,db,pyqt5,setFont,query,font,页面 From: https://www.cnblogs.com/LoLong/p/16976912.html