宜配屋

python3+PyQt5使用数据库窗口视图

yipeiwu_com6年前Python基础

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：

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【听图阁-专注于Python设计】。

返回列表

上一篇：Python字符转换

下一篇：PHP生成静态页面详解

相关文章

浅谈python中get pass用法

浅谈python中get pass用法

python中getpass 模块的作用是输入密码不可见 运行到这脚本不继续运行下去, 打开pycharm中的terminal 如上图显示，password中有输入密码，但不显示 以...

python中sys.argv函数精简概括

python中sys.argv函数精简概括

sys.argv函数通常用来读取命令行参数，其中保存了程序的文件名和命令行参数，读入的参数以元组的形式保存。下面以sys.argv[0]，sys.argv[1]，sys.argv[1:]...

pytorch + visdom 处理简单分类问题的示例

pytorch + visdom 处理简单分类问题的示例

环境 系统 ： win 10 显卡：gtx965m cpu ：i7-6700HQ python 3.61 pytorch 0.3 包引用 import torch from...

Python cv2 图像自适应灰度直方图均衡化处理方法

Python cv2 图像自适应灰度直方图均衡化处理方法

__author__ = 'Administrator' import numpy as np import cv2 mri_img = np.load('mri_img.npy...

python字典嵌套字典的情况下找到某个key的value详解

最近在用python写接口的测试程序，期间用到解析字典获取某个key的value，由于多个接口返回的字典格式不是固定的并存在多层嵌套的情况。在字典的方法中也没有找到可直接达到目的的方法(...

© YiPeiWu.com 【宜配屋】 粤ICP备17031333号

Powered By Z-BlogPHP. Theme by TOYEAN.