python3+PyQt5使用数据库窗口视图


Posted in Python onApril 24, 2018

能够为数据库数据提供的最简单的用户界面之一就是窗体,窗体可以一次性呈现出来自同一记录的各个域。本文通过python3+pyqt5改写实现了python Qt gui 快速变成15章的例子。

#!/usr/bin/env python3

import os
import sys
from PyQt5.QtCore import (QDate, QDateTime, QFile, QVariant, Qt)
from PyQt5.QtWidgets import (QApplication, QDataWidgetMapper,QComboBox,
        QDateTimeEdit, QDialog, QGridLayout, QHBoxLayout, QLabel,
        QLineEdit, QMessageBox, QPushButton, QVBoxLayout)
from PyQt5.QtGui import QIcon,QPixmap,QCursor
from PyQt5.QtSql import (QSqlDatabase, QSqlQuery, QSqlRelation,
  QSqlRelationalDelegate, QSqlRelationalTableModel)
import qrc_resources

MAC = True
try:
 from PyQt5.QtGui import qt_mac_set_native_menubar
except ImportError:
 MAC = False

ID, CALLER, STARTTIME, ENDTIME, TOPIC, OUTCOMEID = range(6)
DATETIME_FORMAT = "yyyy-MM-dd hh:mm"


def createFakeData():
 import random

 print("Dropping tables...")
 query = QSqlQuery()
 query.exec_("DROP TABLE calls")
 query.exec_("DROP TABLE outcomes")
 QApplication.processEvents()

 print("Creating tables...")
 query.exec_("""CREATE TABLE outcomes (
    id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
    name VARCHAR(40) NOT NULL)""")

 query.exec_("""CREATE TABLE calls (
    id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
    caller VARCHAR(40) NOT NULL,
    starttime DATETIME NOT NULL,
    endtime DATETIME NOT NULL,
    topic VARCHAR(80) NOT NULL,
    outcomeid INTEGER NOT NULL,
    FOREIGN KEY (outcomeid) REFERENCES outcomes)""")
 QApplication.processEvents()
 print("Populating tables...")
 for name in ("Resolved", "Unresolved", "Calling back", "Escalate",
     "Wrong number"):
  query.exec_("INSERT INTO outcomes (name) VALUES ('{0}')".format(
     name))
 topics = ("Complaint", "Information request", "Off topic",
    "Information supplied", "Complaint", "Complaint")
 now = QDateTime.currentDateTime()
 query.prepare("INSERT INTO calls (caller, starttime, endtime, "
     "topic, outcomeid) VALUES (:caller, :starttime, "
     ":endtime, :topic, :outcomeid)")
 for name in ('Joshan Cockerall', 'Ammanie Ingham',
   'Diarmuid Bettington', 'Juliana Bannister',
   'Oakley-Jay Buxton', 'Reilley Collinge',
   'Ellis-James Mcgehee', 'Jazmin Lawton',
   'Lily-Grace Smythe', 'Coskun Lant', 'Lauran Lanham',
   'Millar Poindexter', 'Naqeeb Neild', 'Maxlee Stoddart',
   'Rebia Luscombe', 'Briana Christine', 'Charli Pease',
   'Deena Mais', 'Havia Huffman', 'Ethan Davie',
   'Thomas-Jack Silver', 'Harpret Bray', 'Leigh-Ann Goodliff',
   'Seoras Bayes', 'Jenna Underhill', 'Veena Helps',
   'Mahad Mcintosh', 'Allie Hazlehurst', 'Aoife Warrington',
   'Cameron Burton', 'Yildirim Ahlberg', 'Alissa Clayton',
   'Josephine Weber', 'Fiore Govan', 'Howard Ragsdale',
   'Tiernan Larkins', 'Seren Sweeny', 'Arisha Keys',
   'Kiki Wearing', 'Kyran Ponsonby', 'Diannon Pepper',
   'Mari Foston', 'Sunil Manson', 'Donald Wykes',
   'Rosie Higham', 'Karmin Raines', 'Tayyibah Leathem',
   'Kara-jay Knoll', 'Shail Dalgleish', 'Jaimie Sells'):
  start = now.addDays(-random.randint(1, 30))
  start = now.addSecs(-random.randint(60 * 5, 60 * 60 * 2))
  end = start.addSecs(random.randint(20, 60 * 13))
  start=start.toString(DATETIME_FORMAT)
  end=end.toString(DATETIME_FORMAT)  
  topic = random.choice(topics)
  outcomeid = int(random.randint(1, 5))
  query.bindValue(":caller", name)
  query.bindValue(":starttime", start)
  query.bindValue(":endtime", end)
  query.bindValue(":topic", topic)
  query.bindValue(":outcomeid", outcomeid)
  query.exec_()
 QApplication.processEvents()

 print("Calls:")
 query.exec_("SELECT calls.id, calls.caller, calls.starttime, "
    "calls.endtime, calls.topic, calls.outcomeid, "
    "outcomes.name FROM calls, outcomes "
    "WHERE calls.outcomeid = outcomes.id "
    "ORDER by calls.starttime")
 while query.next():
  id = query.value(ID)
  caller = str(query.value(CALLER))
  starttime = str(query.value(STARTTIME))
  endtime = str(query.value(ENDTIME))
  topic = str(query.value(TOPIC))
  outcome = str(query.value(6))
  print("{0:02d}: {1} {2} - {3} {4} [{5}]".format(id, caller,
    starttime, endtime, topic, outcome))
 QApplication.processEvents()


class PhoneLogDlg(QDialog):

 FIRST, PREV, NEXT, LAST = range(4)

 def __init__(self, parent=None):
  super(PhoneLogDlg, self).__init__(parent)

  callerLabel = QLabel("&Caller:")
  self.callerEdit = QLineEdit()
  callerLabel.setBuddy(self.callerEdit)
  today = QDate.currentDate()
  startLabel = QLabel("&Start:")
  self.startDateTime = QDateTimeEdit()
  startLabel.setBuddy(self.startDateTime)
  self.startDateTime.setDateRange(today, today)
  self.startDateTime.setDisplayFormat(DATETIME_FORMAT)
  endLabel = QLabel("&End:")
  self.endDateTime = QDateTimeEdit()
  endLabel.setBuddy(self.endDateTime)
  self.endDateTime.setDateRange(today, today)
  self.endDateTime.setDisplayFormat(DATETIME_FORMAT)
  topicLabel = QLabel("&Topic:")
  topicEdit = QLineEdit()
  topicLabel.setBuddy(topicEdit)
  outcomeLabel = QLabel("&Outcome:")
  self.outcomeComboBox = QComboBox()
  outcomeLabel.setBuddy(self.outcomeComboBox)
  firstButton = QPushButton()
  firstButton.setIcon(QIcon(":/first.png"))
  prevButton = QPushButton()
  prevButton.setIcon(QIcon(":/prev.png"))
  nextButton = QPushButton()
  nextButton.setIcon(QIcon(":/next.png"))
  lastButton = QPushButton()
  lastButton.setIcon(QIcon(":/last.png"))
  addButton = QPushButton("&Add")
  addButton.setIcon(QIcon(":/add.png"))
  deleteButton = QPushButton("&Delete")
  deleteButton.setIcon(QIcon(":/delete.png"))
  quitButton = QPushButton("&Quit")
  quitButton.setIcon(QIcon(":/quit.png"))
  if not MAC:
   addButton.setFocusPolicy(Qt.NoFocus)
   deleteButton.setFocusPolicy(Qt.NoFocus)

  fieldLayout = QGridLayout()
  fieldLayout.addWidget(callerLabel, 0, 0)
  fieldLayout.addWidget(self.callerEdit, 0, 1, 1, 3)
  fieldLayout.addWidget(startLabel, 1, 0)
  fieldLayout.addWidget(self.startDateTime, 1, 1)
  fieldLayout.addWidget(endLabel, 1, 2)
  fieldLayout.addWidget(self.endDateTime, 1, 3)
  fieldLayout.addWidget(topicLabel, 2, 0)
  fieldLayout.addWidget(topicEdit, 2, 1, 1, 3)
  fieldLayout.addWidget(outcomeLabel, 3, 0)
  fieldLayout.addWidget(self.outcomeComboBox, 3, 1, 1, 3)
  navigationLayout = QHBoxLayout()
  navigationLayout.addWidget(firstButton)
  navigationLayout.addWidget(prevButton)
  navigationLayout.addWidget(nextButton)
  navigationLayout.addWidget(lastButton)
  fieldLayout.addLayout(navigationLayout, 4, 0, 1, 2)
  buttonLayout = QVBoxLayout()
  buttonLayout.addWidget(addButton)
  buttonLayout.addWidget(deleteButton)
  buttonLayout.addStretch()
  buttonLayout.addWidget(quitButton)
  layout = QHBoxLayout()
  layout.addLayout(fieldLayout)
  layout.addLayout(buttonLayout)
  self.setLayout(layout)

  self.model = QSqlRelationalTableModel(self)
  self.model.setTable("calls")
  self.model.setRelation(OUTCOMEID,
    QSqlRelation("outcomes", "id", "name"))
  self.model.setSort(STARTTIME, Qt.AscendingOrder)
  self.model.select()

  self.mapper = QDataWidgetMapper(self)
  self.mapper.setSubmitPolicy(QDataWidgetMapper.ManualSubmit)
  self.mapper.setModel(self.model)
  self.mapper.setItemDelegate(QSqlRelationalDelegate(self))
  self.mapper.addMapping(self.callerEdit, CALLER)
  self.mapper.addMapping(self.startDateTime, STARTTIME)
  self.mapper.addMapping(self.endDateTime, ENDTIME)
  self.mapper.addMapping(topicEdit, TOPIC)
  relationModel = self.model.relationModel(OUTCOMEID)
  self.outcomeComboBox.setModel(relationModel)
  self.outcomeComboBox.setModelColumn(
    relationModel.fieldIndex("name"))
  self.mapper.addMapping(self.outcomeComboBox, OUTCOMEID)
  self.mapper.toFirst()

  firstButton.clicked.connect(lambda: self.saveRecord(PhoneLogDlg.FIRST))
  prevButton.clicked.connect(lambda: self.saveRecord(PhoneLogDlg.PREV))
  nextButton.clicked.connect(lambda: self.saveRecord(PhoneLogDlg.NEXT))
  lastButton.clicked.connect(lambda: self.saveRecord(PhoneLogDlg.LAST))  
  addButton.clicked.connect(self.addRecord)
  deleteButton.clicked.connect(self.deleteRecord)  
  quitButton.clicked.connect(self.done)
  self.setWindowTitle("Phone Log")


 def done(self, result=None):
  self.mapper.submit()
  QDialog.done(self, True)


 def addRecord(self):
  row = self.model.rowCount()
  self.mapper.submit()
  self.model.insertRow(row)
  self.mapper.setCurrentIndex(row)
  now = QDateTime.currentDateTime()
  self.startDateTime.setDateTime(now)
  self.endDateTime.setDateTime(now)
  self.outcomeComboBox.setCurrentIndex(
    self.outcomeComboBox.findText("Unresolved"))
  self.callerEdit.setFocus()


 def deleteRecord(self):
  caller = self.callerEdit.text()
  starttime = self.startDateTime.dateTime().toString(
           DATETIME_FORMAT)
  if (QMessageBox.question(self,
    "Delete",
    "Delete call made by<br>{0} on {1}?".format(caller,starttime),
    QMessageBox.Yes|QMessageBox.No) ==
    QMessageBox.No):
   return
  row = self.mapper.currentIndex()
  self.model.removeRow(row)
  self.model.submitAll()
  self.model.select()
  if row + 1 >= self.model.rowCount():
   row = self.model.rowCount() - 1
  self.mapper.setCurrentIndex(row)


 def saveRecord(self, where):
  row = self.mapper.currentIndex()
  self.mapper.submit()
  if where == PhoneLogDlg.FIRST:
   row = 0
  elif where == PhoneLogDlg.PREV:
   row = 0 if row <= 1 else row - 1
  elif where == PhoneLogDlg.NEXT:
   row += 1
   if row >= self.model.rowCount():
    row = self.model.rowCount() - 1
  elif where == PhoneLogDlg.LAST:
   row = self.model.rowCount() - 1
  self.mapper.setCurrentIndex(row)


def main():
 app = QApplication(sys.argv)

 filename = os.path.join(os.path.dirname(__file__), "phonelog-fk.db")
 create = not QFile.exists(filename)

 db = QSqlDatabase.addDatabase("QSQLITE")
 db.setDatabaseName(filename)
 if not db.open():
  QMessageBox.warning(None, "Phone Log",
   QString("Database Error: %1").arg(db.lastError().text()))
  sys.exit(1)

 splash = None
 if create:
  app.setOverrideCursor(QCursor(Qt.WaitCursor))
  splash = QLabel()
  pixmap = QPixmap(":/phonelogsplash.png")
  splash.setPixmap(pixmap)
  splash.setMask(pixmap.createHeuristicMask())
  splash.setWindowFlags(Qt.SplashScreen)
  rect = app.desktop().availableGeometry()
  splash.move((rect.width() - pixmap.width()) / 2,
     (rect.height() - pixmap.height()) / 2)
  splash.show()
  app.processEvents()
  createFakeData()

 form = PhoneLogDlg()
 form.show()
 if create:
  splash.close()
  app.processEvents()
  app.restoreOverrideCursor()
 sys.exit(app.exec_())

main()

运行结果:

python3+PyQt5使用数据库窗口视图

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持三水点靠木。

Python 相关文章推荐
Win10下Python环境搭建与配置教程
Nov 18 Python
Python基于OpenCV实现视频的人脸检测
Jan 23 Python
python进行两个表格对比的方法
Jun 27 Python
在cmder下安装ipython以及环境的搭建
Oct 19 Python
Python多线程原理与用法实例剖析
Jan 22 Python
python中tkinter的应用:修改字体的实例讲解
Jul 17 Python
Python类中的魔法方法之 __slots__原理解析
Aug 26 Python
30秒学会30个超实用Python代码片段【收藏版】
Oct 15 Python
pygame实现俄罗斯方块游戏(基础篇2)
Oct 29 Python
Python3 中作为一等对象的函数解析
Dec 11 Python
Python 内置变量和函数的查看及说明介绍
Dec 25 Python
Pandas的数据过滤实现
Jan 15 Python
python下解压缩zip文件并删除文件的实例
Apr 24 #Python
python 删除指定时间间隔之前的文件实例
Apr 24 #Python
对python 各种删除文件失败的处理方式分享
Apr 24 #Python
Python向Excel中插入图片的简单实现方法
Apr 24 #Python
Python 通配符删除文件的实例
Apr 24 #Python
python删除不需要的python文件方法
Apr 24 #Python
Python中XlsxWriter模块简介与用法分析
Apr 24 #Python
You might like
php中使用Imagick实现图像直方图的实现代码
2011/08/30 PHP
PHP Imagick完美实现图片裁切、生成缩略图、添加水印
2016/02/22 PHP
JavaScript使用过程中需要注意的地方和一些基本语法
2010/08/26 Javascript
javascript 函数声明与函数表达式的区别介绍
2013/10/05 Javascript
js 日期比较相关天数代码
2014/04/02 Javascript
JavaScript中的slice()方法使用详解
2015/06/06 Javascript
Wireshark基本介绍和学习TCP三次握手
2016/08/15 Javascript
HTML5canvas 绘制一个圆环形的进度表示实例
2016/12/16 Javascript
JS日程管理插件FullCalendar中文说明文档
2017/02/06 Javascript
Node.js数据库操作之查询MySQL数据库(二)
2017/03/04 Javascript
jQuery模拟窗口抖动效果
2017/03/15 Javascript
JavaScript数据结构之双向链表和双向循环链表的实现
2017/11/28 Javascript
Vue CLI3搭建的项目中路径相关问题的解决
2018/09/17 Javascript
Vue-cli项目部署到Nginx服务器的方法
2019/11/01 Javascript
微信小程序中data-key属性之数据传输(经验总结)
2020/08/22 Javascript
vite2.0+vue3移动端项目实战详解
2021/03/03 Vue.js
wxpython 学习笔记 第一天
2009/02/09 Python
Python RabbitMQ消息队列实现rpc
2018/05/30 Python
计算机二级python学习教程(3) python语言基本数据类型
2019/05/16 Python
创建Shapefile文件并写入数据的例子
2019/11/26 Python
python批量处理txt文件的实例代码
2020/01/13 Python
在tensorflow中设置保存checkpoint的最大数量实例
2020/01/21 Python
俄罗斯的精英皮具:Wittchen
2018/01/29 全球购物
后备干部考察材料
2014/02/12 职场文书
父亲的菜园教学反思
2014/02/13 职场文书
政协调研汇报材料
2014/08/15 职场文书
房地产经营管理专业自荐信
2014/09/02 职场文书
"9.18"国耻日演讲稿范文
2014/09/14 职场文书
群众路线教育实践活动总结
2014/10/30 职场文书
家长学校教学计划
2015/01/19 职场文书
侵犯商业秘密的律师函
2015/05/27 职场文书
学前教育见习总结
2015/06/23 职场文书
《地震中的父与子》教学反思
2016/02/16 职场文书
2016年6.5世界环境日宣传活动总结
2016/04/01 职场文书
Python3 多线程(连接池)操作MySQL插入数据
2021/06/09 Python
mysql查询结果实现多列拼接查询
2022/04/03 MySQL