python3+PyQt5使用数据库表视图


Posted in Python onApril 24, 2018

上文提到窗体可以一次性呈现出来自同一记录的各个域,但是对于用户希望能看到多条记录的表来说,就需要使用表格化的视图了。本文通过python3+pyqt5改写实现了python Qt gui 快速变成15章的例子,用户能够一次看到多条记录。

#!/usr/bin/env python3
import os
import sys
from PyQt5.QtCore import (PYQT_VERSION_STR, QDate, QFile, QRegExp, QVariant, QModelIndex,Qt)
from PyQt5.QtWidgets import (QApplication,QComboBox,
        QDateTimeEdit, QDialog, QGridLayout, QHBoxLayout, QLabel,
        QLineEdit, QDateEdit,QMessageBox, QPushButton,
        QStyleOptionViewItem, QTableView,QVBoxLayout)
from PyQt5.QtGui import QPixmap,QCursor,QRegExpValidator
from PyQt5.QtSql import (QSqlDatabase, QSqlQuery, QSqlRelation,
       QSqlRelationalDelegate, QSqlRelationalTableModel,QSqlTableModel)
import qrc_resources
MAC = True
try:
 from PyQt5.QtGui import qt_mac_set_native_menubar
except ImportError:
 MAC = False

ID = 0
NAME = ASSETID = 1
CATEGORYID = DATE = DESCRIPTION = 2
ROOM = ACTIONID = 3

ACQUIRED = 1


def createFakeData():
 import random

 print("Dropping tables...")
 query = QSqlQuery()
 query.exec_("DROP TABLE assets")
 query.exec_("DROP TABLE logs")
 query.exec_("DROP TABLE actions")
 query.exec_("DROP TABLE categories")
 QApplication.processEvents()

 print("Creating tables...")
 query.exec_("""CREATE TABLE actions (
    id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
    name VARCHAR(20) NOT NULL,
    description VARCHAR(40) NOT NULL)""")
 query.exec_("""CREATE TABLE categories (
    id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
    name VARCHAR(20) NOT NULL,
    description VARCHAR(40) NOT NULL)""")
 query.exec_("""CREATE TABLE assets (
    id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
    name VARCHAR(40) NOT NULL,
    categoryid INTEGER NOT NULL,
    room VARCHAR(4) NOT NULL,
    FOREIGN KEY (categoryid) REFERENCES categories)""")
 query.exec_("""CREATE TABLE logs (
    id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
    assetid INTEGER NOT NULL,
    date DATE NOT NULL,
    actionid INTEGER NOT NULL,
    FOREIGN KEY (assetid) REFERENCES assets,
    FOREIGN KEY (actionid) REFERENCES actions)""")
 QApplication.processEvents()

 print("Populating tables...")
 query.exec_("INSERT INTO actions (name, description) "
    "VALUES ('Acquired', 'When installed')")
 query.exec_("INSERT INTO actions (name, description) "
    "VALUES ('Broken', 'When failed and unusable')")
 query.exec_("INSERT INTO actions (name, description) "
    "VALUES ('Repaired', 'When back in service')")
 query.exec_("INSERT INTO actions (name, description) "
    "VALUES ('Routine maintenance', "
    "'When tested, refilled, etc.')")
 query.exec_("INSERT INTO categories (name, description) VALUES "
    "('Computer Equipment', "
    "'Monitors, System Units, Peripherals, etc.')")
 query.exec_("INSERT INTO categories (name, description) VALUES "
    "('Furniture', 'Chairs, Tables, Desks, etc.')")
 query.exec_("INSERT INTO categories (name, description) VALUES "
    "('Electrical Equipment', 'Non-computer electricals')")
 today = QDate.currentDate()
 floors = list(range(1, 12)) + list(range(14, 28))
 monitors = (('17" LCD Monitor', 1),
    ('20" LCD Monitor', 1),
    ('21" LCD Monitor', 1),
    ('21" CRT Monitor', 1),
    ('24" CRT Monitor', 1))
 computers = (("Computer (32-bit/80GB/0.5GB)", 1),
     ("Computer (32-bit/100GB/1GB)", 1),
     ("Computer (32-bit/120GB/1GB)", 1),
     ("Computer (64-bit/240GB/2GB)", 1),
     ("Computer (64-bit/320GB/4GB)", 1))
 printers = (("Laser Printer (4 ppm)", 1),
    ("Laser Printer (6 ppm)", 1),
    ("Laser Printer (8 ppm)", 1),
    ("Laser Printer (16 ppm)", 1))
 chairs = (("Secretary Chair", 2),
    ("Executive Chair (Basic)", 2),
    ("Executive Chair (Ergonimic)", 2),
    ("Executive Chair (Hi-Tech)", 2))
 desks = (("Desk (Basic, 3 drawer)", 2),
    ("Desk (Standard, 3 drawer)", 2),
    ("Desk (Executive, 3 drawer)", 2),
    ("Desk (Executive, 4 drawer)", 2),
    ("Desk (Large, 4 drawer)", 2))
 furniture = (("Filing Cabinet (3 drawer)", 2),
     ("Filing Cabinet (4 drawer)", 2),
     ("Filing Cabinet (5 drawer)", 2),
     ("Bookcase (4 shelves)", 2),
     ("Bookcase (6 shelves)", 2),
     ("Table (4 seater)", 2),
     ("Table (8 seater)", 2),
     ("Table (12 seater)", 2))
 electrical = (("Fan (3 speed)", 3),
     ("Fan (5 speed)", 3),
     ("Photocopier (4 ppm)", 3),
     ("Photocopier (6 ppm)", 3),
     ("Photocopier (8 ppm)", 3),
     ("Shredder", 3))
 query.prepare("INSERT INTO assets (name, categoryid, room) "
     "VALUES (:name, :categoryid, :room)")
 logQuery = QSqlQuery()
 logQuery.prepare("INSERT INTO logs (assetid, date, actionid) "
      "VALUES (:assetid, :date, :actionid)")
 assetid = 1
 for i in range(20):
  room = "{0:02d}{1:02d}".format(
    random.choice(floors), random.randint(1, 62))
  for name, category in (random.choice(monitors),
    random.choice(computers), random.choice(chairs),
    random.choice(desks), random.choice(furniture)):
   query.bindValue(":name", name)
   query.bindValue(":categoryid", category)
   query.bindValue(":room", room)
   query.exec_()
   logQuery.bindValue(":assetid", assetid)
   when = today.addDays(-random.randint(7, 1500))
   #when=when.toString()
   logQuery.bindValue(":date", when.toString("yyyy-MM-dd"))
   logQuery.bindValue(":actionid", ACQUIRED)
   logQuery.exec_()
   if random.random() > 0.7:
    logQuery.bindValue(":assetid", assetid)
    when = when.addDays(random.randint(1, 1500))
    if when <= today:
     logQuery.bindValue(":date", when.toString("yyyy-MM-dd"))
     logQuery.bindValue(":actionid",
       random.choice((2, 4)))
     logQuery.exec_()
   assetid += 1
  if random.random() > 0.8:
   name, category = random.choice(printers)
   query.bindValue(":name", name)
   query.bindValue(":categoryid", category)
   query.bindValue(":room", room)
   query.exec_()
   logQuery.bindValue(":assetid", assetid)
   when = today.addDays(-random.randint(7, 1500))
   logQuery.bindValue(":date", when.toString("yyyy-MM-dd"))
   logQuery.bindValue(":actionid",ACQUIRED)
   logQuery.exec_()
   if random.random() > 0.6:
    logQuery.bindValue(":assetid", assetid)
    when = when.addDays(random.randint(1, 1500))
    if when <= today:
     logQuery.bindValue(":date", when.toString("yyyy-MM-dd"))
     logQuery.bindValue(":actionid",
       random.choice((2, 4)))
     logQuery.exec_()
   assetid += 1
  if random.random() > 0.6:
   name, category = random.choice(electrical)
   query.bindValue(":name", name)
   query.bindValue(":categoryid", category)
   query.bindValue(":room", room)
   query.exec_()
   logQuery.bindValue(":assetid", assetid)
   when = today.addDays(-random.randint(7, 1500))
   logQuery.bindValue(":date", when.toString("yyyy-MM-dd"))
   logQuery.bindValue(":actionid",ACQUIRED)
   logQuery.exec_()
   if random.random() > 0.5:
    logQuery.bindValue(":assetid", assetid)
    when = when.addDays(random.randint(1, 1500))
    if when <= today:
     logQuery.bindValue(":date", when.toString("yyyy-MM-dd"))
     logQuery.bindValue(":actionid",
       random.choice((2, 4)))
     logQuery.exec_()
   assetid += 1
  QApplication.processEvents()

 print("Assets:")
 query.exec_("SELECT id, name, categoryid, room FROM assets "
    "ORDER by id")
 categoryQuery = QSqlQuery()
 while query.next():
  id = query.value(0)
  name = str(query.value(1))
  categoryid = query.value(2)
  room = str(query.value(3))
  categoryQuery.exec_("SELECT name FROM categories "
    "WHERE id = {0}".format(categoryid))
  category = "{0}".format(categoryid)
  if categoryQuery.next():
   category = str(categoryQuery.value(0))
  print("{0}: {1} [{2}] {3}".format(id, name, category, room))
 QApplication.processEvents()


class ReferenceDataDlg(QDialog):

 def __init__(self, table, title, parent=None):
  super(ReferenceDataDlg, self).__init__(parent)

  self.model = QSqlTableModel(self)
  self.model.setTable(table)
  self.model.setSort(NAME, Qt.AscendingOrder)
  self.model.setHeaderData(ID, Qt.Horizontal,"ID")
  self.model.setHeaderData(NAME, Qt.Horizontal, "Name")
  self.model.setHeaderData(DESCRIPTION, Qt.Horizontal,"Description")
  self.model.select()

  self.view = QTableView()
  self.view.setModel(self.model)
  self.view.setSelectionMode(QTableView.SingleSelection)
  self.view.setSelectionBehavior(QTableView.SelectRows)
  self.view.setColumnHidden(ID, True)
  self.view.resizeColumnsToContents()
  addButton = QPushButton("&Add")
  deleteButton = QPushButton("&Delete")
  okButton = QPushButton("&OK")
  if not MAC:
   addButton.setFocusPolicy(Qt.NoFocus)
   deleteButton.setFocusPolicy(Qt.NoFocus)

  buttonLayout = QHBoxLayout()
  buttonLayout.addWidget(addButton)
  buttonLayout.addWidget(deleteButton)
  buttonLayout.addStretch()
  buttonLayout.addWidget(okButton)
  layout = QVBoxLayout()
  layout.addWidget(self.view)
  layout.addLayout(buttonLayout)
  self.setLayout(layout)

  addButton.clicked.connect(self.addRecord)
  deleteButton.clicked.connect(self.deleteRecord)
  okButton.clicked.connect(self.accept)

  self.setWindowTitle(
    "Asset Manager - Edit {0} Reference Data".format(title))

 def addRecord(self):
  row = self.model.rowCount()
  self.model.insertRow(row)
  index = self.model.index(row, NAME)
  self.view.setCurrentIndex(index)
  self.view.edit(index)


 def deleteRecord(self):
  index = self.view.currentIndex()
  if not index.isValid():
   return
  #QSqlDatabase.database().transaction()
  record = self.model.record(index.row())
  id = record.value(ID)
  table = self.model.tableName()
  query = QSqlQuery()
  if table == "actions":
   query.exec_("SELECT COUNT(*) FROM logs "
        "WHERE actionid = {0}".format(id))
  elif table == "categories":
   query.exec_("SELECT COUNT(*) FROM assets "
        "WHERE categoryid = {0}".format(id))
  count = 0
  if query.next():
   count = query.value(0)
  if count:
   QMessageBox.information(self,
     "Delete {0}".format(table),
     ("Cannot delete {0}<br>"
        "from the {1} table because it is used by "
        "{2} records").format(record.value(NAME),table,count))
   #QSqlDatabase.database().rollback()
   return
  self.model.removeRow(index.row())
  self.model.submitAll()
  self.model.select()
  #QSqlDatabase.database().commit()



class AssetDelegate(QSqlRelationalDelegate):


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


 def paint(self, painter, option, index):
  myoption = QStyleOptionViewItem(option)
  if index.column() == ROOM:
   myoption.displayAlignment |= (Qt.AlignRight|Qt.AlignVCenter)
  QSqlRelationalDelegate.paint(self, painter, myoption, index)


 def createEditor(self, parent, option, index):
  if index.column() == ROOM:
   editor = QLineEdit(parent)
   regex = QRegExp(r"(?:0[1-9]|1[0124-9]|2[0-7])"
         r"(?:0[1-9]|[1-5][0-9]|6[012])")
   validator = QRegExpValidator(regex, parent)
   editor.setValidator(validator)
   editor.setInputMask("9999")
   editor.setAlignment(Qt.AlignRight|Qt.AlignVCenter)
   return editor
  else:
   return QSqlRelationalDelegate.createEditor(self, parent,
              option, index)

 def setEditorData(self, editor, index):
  if index.column() == ROOM:
   text = index.model().data(index, Qt.DisplayRole)
   editor.setText(text)
  else:
   QSqlRelationalDelegate.setEditorData(self, editor, index)


 def setModelData(self, editor, model, index):
  if index.column() == ROOM:
   model.setData(index, editor.text())
  else:
   QSqlRelationalDelegate.setModelData(self, editor, model,
            index)


class LogDelegate(QSqlRelationalDelegate):

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


 def paint(self, painter, option, index):
  myoption = QStyleOptionViewItem(option)
  if index.column() == DATE:
   myoption.displayAlignment |= (Qt.AlignRight|Qt.AlignVCenter)
  QSqlRelationalDelegate.paint(self, painter, myoption, index)


 def createEditor(self, parent, option, index):
  if (index.column() == ACTIONID and
   index.model().data(index, Qt.DisplayRole) ==
   ACQUIRED): # Acquired is read-only
   return
  if index.column() == DATE:
   editor = QDateEdit(parent)
   editor.setMaximumDate(QDate.currentDate())
   editor.setDisplayFormat("yyyy-MM-dd")
   if PYQT_VERSION_STR >= "4.1.0":
    editor.setCalendarPopup(True)
   editor.setAlignment(Qt.AlignRight|
        Qt.AlignVCenter)
   return editor
  else:
   return QSqlRelationalDelegate.createEditor(self, parent,
              option, index)

 def setEditorData(self, editor, index):
  if index.column() == DATE:
   date = index.model().data(index, Qt.DisplayRole)
   editor.setDate(date)
  else:
   QSqlRelationalDelegate.setEditorData(self, editor, index)


 def setModelData(self, editor, model, index):
  if index.column() == DATE:
   model.setData(index, QVariant(editor.date()))
  else:
   QSqlRelationalDelegate.setModelData(self, editor, model,
            index)


class MainForm(QDialog):

 def __init__(self):
  super(MainForm, self).__init__()

  self.assetModel = QSqlRelationalTableModel(self)
  self.assetModel.setTable("assets")
  self.assetModel.setRelation(CATEGORYID,
    QSqlRelation("categories", "id", "name"))
  self.assetModel.setSort(ROOM, Qt.AscendingOrder)
  self.assetModel.setHeaderData(ID, Qt.Horizontal,"ID")
  self.assetModel.setHeaderData(NAME, Qt.Horizontal,"Name")
  self.assetModel.setHeaderData(CATEGORYID, Qt.Horizontal,"Category")
  self.assetModel.setHeaderData(ROOM, Qt.Horizontal,"Room")
  self.assetModel.select()

  self.assetView = QTableView()
  self.assetView.setModel(self.assetModel)
  self.assetView.setItemDelegate(AssetDelegate(self))
  self.assetView.setSelectionMode(QTableView.SingleSelection)
  self.assetView.setSelectionBehavior(QTableView.SelectRows)
  self.assetView.setColumnHidden(ID, True)
  self.assetView.resizeColumnsToContents()
  assetLabel = QLabel("A&ssets")
  assetLabel.setBuddy(self.assetView)

  self.logModel = QSqlRelationalTableModel(self)
  self.logModel.setTable("logs")
  self.logModel.setRelation(ACTIONID,
    QSqlRelation("actions", "id", "name"))
  self.logModel.setSort(DATE, Qt.AscendingOrder)
  self.logModel.setHeaderData(DATE, Qt.Horizontal, "Date")
  self.logModel.setHeaderData(ACTIONID, Qt.Horizontal,"Action")
  self.logModel.select()

  self.logView = QTableView()
  self.logView.setModel(self.logModel)
  self.logView.setItemDelegate(LogDelegate(self))
  self.logView.setSelectionMode(QTableView.SingleSelection)
  self.logView.setSelectionBehavior(QTableView.SelectRows)
  self.logView.setColumnHidden(ID, True)
  self.logView.setColumnHidden(ASSETID, True)
  self.logView.resizeColumnsToContents()
  self.logView.horizontalHeader().setStretchLastSection(True)
  logLabel = QLabel("&Logs")
  logLabel.setBuddy(self.logView)

  addAssetButton = QPushButton("&Add Asset")
  deleteAssetButton = QPushButton("&Delete Asset")
  addActionButton = QPushButton("Add A&ction")
  deleteActionButton = QPushButton("Delete Ac&tion")
  editActionsButton = QPushButton("&Edit Actions...")
  editCategoriesButton = QPushButton("Ed&it Categories...")
  quitButton = QPushButton("&Quit")
  for button in (addAssetButton, deleteAssetButton,
    addActionButton, deleteActionButton,
    editActionsButton, editCategoriesButton, quitButton):
   if MAC:
    button.setDefault(False)
    button.setAutoDefault(False)
   else:
    button.setFocusPolicy(Qt.NoFocus)

  dataLayout = QVBoxLayout()
  dataLayout.addWidget(assetLabel)
  dataLayout.addWidget(self.assetView, 1)
  dataLayout.addWidget(logLabel)
  dataLayout.addWidget(self.logView)
  buttonLayout = QVBoxLayout()
  buttonLayout.addWidget(addAssetButton)
  buttonLayout.addWidget(deleteAssetButton)
  buttonLayout.addWidget(addActionButton)
  buttonLayout.addWidget(deleteActionButton)
  buttonLayout.addWidget(editActionsButton)
  buttonLayout.addWidget(editCategoriesButton)
  buttonLayout.addStretch()
  buttonLayout.addWidget(quitButton)
  layout = QHBoxLayout()
  layout.addLayout(dataLayout, 1)
  layout.addLayout(buttonLayout)
  self.setLayout(layout)

  #self.connect(self.assetView.selectionModel(),
    #SIGNAL(("currentRowChanged(QModelIndex,QModelIndex)")),
    #self.assetChanged)
  self.assetView.selectionModel().currentRowChanged.connect(self.assetChanged)
  addAssetButton.clicked.connect(self.addAsset)
  deleteAssetButton.clicked.connect(self.deleteAsset)
  addActionButton.clicked.connect(self.addAction)
  deleteActionButton.clicked.connect(self.deleteAction)
  editActionsButton.clicked.connect(self.editActions)
  editCategoriesButton.clicked.connect(self.editCategories)
  quitButton.clicked.connect(self.done)

  self.assetChanged(self.assetView.currentIndex())
  self.setMinimumWidth(650)
  self.setWindowTitle("Asset Manager")


 def done(self, result=1):
  query = QSqlQuery()
  query.exec_("DELETE FROM logs WHERE logs.assetid NOT IN"
     "(SELECT id FROM assets)")
  QDialog.done(self, 1)


 def assetChanged(self, index):
  if index.isValid():
   record = self.assetModel.record(index.row())
   #print(index.row())
   id = record.value("id")
   self.logModel.setFilter("assetid = {0}".format(id))
  else:
   self.logModel.setFilter("assetid = -1")
  #self.logModel.reset() # workaround for Qt <= 4.3.3/SQLite bug
  #self.logModel.beginResetModel() 
  self.logModel.select()
  self.logView.horizontalHeader().setVisible(
    self.logModel.rowCount() > 0)
  if PYQT_VERSION_STR < "4.1.0":
   self.logView.setColumnHidden(ID, True)
   self.logView.setColumnHidden(ASSETID, True)
  #self.logModel.endResetModel()



 def addAsset(self):
  row = (self.assetView.currentIndex().row()
    if self.assetView.currentIndex().isValid() else 0)

  QSqlDatabase.database().transaction()
  self.assetModel.insertRow(row)
  index = self.assetModel.index(row, NAME)
  self.assetView.setCurrentIndex(index)

  assetid = 1
  query = QSqlQuery()
  query.exec_("SELECT MAX(id) FROM assets")
  if query.next():
   assetid = query.value(0)
  query.prepare("INSERT INTO logs (assetid, date, actionid) "
      "VALUES (:assetid, :date, :actionid)")
  query.bindValue(":assetid", assetid + 1)
  query.bindValue(":date", QDate.currentDate())
  query.bindValue(":actionid", ACQUIRED)
  query.exec_()
  QSqlDatabase.database().commit()
  #self.logModel.select()
  self.assetView.edit(index)


 def deleteAsset(self):
  index = self.assetView.currentIndex()
  if not index.isValid():
   return
  QSqlDatabase.database().transaction()
  record = self.assetModel.record(index.row())
  assetid = record.value(ID)
  logrecords = 1
  query = QSqlQuery("SELECT COUNT(*) FROM logs WHERE assetid = {0}".format(assetid))
  if query.next():
   logrecords = query.value(0)
  msg = ("<font color=red>Delete</font><br><b>{0}</b>"
        "<br>from room {1}").format(record.value(NAME),record.value(ROOM))
  if logrecords > 1:
   msg += (", along with {0} log records"
     .format(logrecords))
  msg += "?"
  if (QMessageBox.question(self, "Delete Asset", msg,
    QMessageBox.Yes|QMessageBox.No) ==
    QMessageBox.No):
   QSqlDatabase.database().rollback()
   return
  #query.exec_("DELETE FROM logs WHERE assetid = {0}"
  #    .format(assetid))

  #use model API
  self.logModel.setFilter("assetid={0}".format(assetid))
  self.logModel.select()
  if self.logModel.rowCount()>0:
   self.logModel.removeRows(0,self.logModel.rowCount())
   self.logModel.submitAll()   


  self.assetModel.removeRow(index.row())
  self.assetModel.submitAll()
  QSqlDatabase.database().commit()
  self.assetModel.select()
  self.assetChanged(self.assetView.currentIndex())


 def addAction(self):
  index = self.assetView.currentIndex()
  if not index.isValid():
   return
  QSqlDatabase.database().transaction()
  record = self.assetModel.record(index.row())
  assetid = record.value(ID)

  row = self.logModel.rowCount()
  self.logModel.insertRow(row)
  self.logModel.setData(self.logModel.index(row, ASSETID),
        assetid)
  self.logModel.setData(self.logModel.index(row, DATE),
        QDate.currentDate())
  QSqlDatabase.database().commit()
  index = self.logModel.index(row, ACTIONID)
  self.logView.setCurrentIndex(index)
  self.logView.edit(index)


 def deleteAction(self):
  index = self.logView.currentIndex()
  if not index.isValid():
   return
  record = self.logModel.record(index.row())
  action = record.value(ACTIONID)
  if action == "Acquired":
   QMessageBox.information(self, "Delete Log",
     "The 'Acquired' log record cannot be deleted.<br>"
     "You could delete the entire asset instead.")
   return
  when = str(record.value(DATE))
  if (QMessageBox.question(self, "Delete Log",
    "Delete log<br>{0} {1}?".format(when, action),
    QMessageBox.Yes|QMessageBox.No) ==
    QMessageBox.No):
   return
  self.logModel.removeRow(index.row())
  self.logModel.submitAll()
  self.logModel.select()


 def editActions(self):
  form = ReferenceDataDlg("actions", "Action", self)
  form.exec_()

 def editCategories(self):
  form = ReferenceDataDlg("categories", "Category", self)
  form.exec_()



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

 filename = os.path.join(os.path.dirname(__file__), "assets.db")
 create = not QFile.exists(filename)
 db = QSqlDatabase.addDatabase("QSQLITE")
 db.setDatabaseName(filename)
 if not db.open():
  QMessageBox.warning(None, "Asset Manager",
   ("Database Error: {0}"
   .format(db.lastError().text())))
  sys.exit(1)

 splash = None
 if create:
  app.setOverrideCursor(QCursor(Qt.WaitCursor))
  splash = QLabel()
  pixmap = QPixmap(":/assetmanagersplash.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 = MainForm()
 form.show()
 if create:
  splash.close()
  app.processEvents()
  app.restoreOverrideCursor()
 app.exec_()
 del form
 del db


main()

运行结果:

python3+PyQt5使用数据库表视图

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
删除目录下相同文件的python代码(逐级优化)
May 25 Python
python中关于日期时间处理的问答集锦
Mar 08 Python
Django中处理出错页面的方法
Jul 15 Python
Python实现代码统计工具(终极篇)
Jul 04 Python
Python3实现的字典遍历操作详解
Apr 18 Python
python 获取url中的参数列表实例
Dec 18 Python
Django+JS 实现点击头像即可更改头像的方法示例
Dec 26 Python
Python基于滑动平均思想实现缺失数据填充的方法
Feb 21 Python
python学习--使用QQ邮箱发送邮件代码实例
Apr 16 Python
Python使用get_text()方法从大段html中提取文本的实例
Aug 27 Python
在Python中实现函数重载的示例代码
Dec 12 Python
Python中的datetime包与time包包和模块详情
Feb 28 Python
python3+PyQt5使用数据库窗口视图
Apr 24 #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
You might like
PHP输出数组中重名的元素的几种处理方法
2012/09/05 PHP
基于PHP+Ajax实现表单验证的详解
2013/06/25 PHP
PHP根据图片色界在不同位置加水印的方法
2015/07/01 PHP
PHP实现基于回溯法求解迷宫问题的方法详解
2017/08/17 PHP
jQuery DIV弹出效果实现代码
2009/07/03 Javascript
基于jquery中children()与find()的区别介绍
2013/04/26 Javascript
jquery实现的省市区三级联动
2015/04/02 Javascript
C#中使用迭代器处理等待任务
2015/07/13 Javascript
原生js实现图片层叠轮播切换效果
2016/02/02 Javascript
通过Tabs方法基于easyUI+bootstrap制作工作站
2016/03/28 Javascript
深入理解MVC中的时间js格式化
2016/05/19 Javascript
jQuery继承extend用法详解
2016/10/10 Javascript
JavaScript中 this 指向问题深度解析
2017/02/21 Javascript
JQuery.dataTables表格插件添加跳转到指定页
2017/06/09 jQuery
详解如何提高 webpack 构建 Vue 项目的速度
2017/07/03 Javascript
vue中父子组件注意事项,传值及slot应用技巧
2018/05/09 Javascript
Python urllib、urllib2、httplib抓取网页代码实例
2015/05/09 Python
Python中splitlines()方法的使用简介
2015/05/20 Python
python获取一组数据里最大值max函数用法实例
2015/05/26 Python
Python实现在线音乐播放器
2017/03/03 Python
django实现登录时候输入密码错误5次锁定用户十分钟
2017/11/05 Python
5个很好的Python面试题问题答案及分析
2018/01/19 Python
django如何连接已存在数据的数据库
2018/08/14 Python
python 判断矩阵中每行非零个数的方法
2019/01/26 Python
python matplotlib画图库学习绘制常用的图
2019/03/19 Python
python儿童学游戏编程知识点总结
2019/06/03 Python
浅谈Python 敏感词过滤的实现
2019/08/15 Python
Python暴力破解Mysql数据的示例
2020/11/09 Python
俄罗斯儿童和青少年服装、鞋子及配件的在线商店:Orby
2020/02/20 全球购物
求职简历自荐信
2014/06/18 职场文书
男人帮观后感
2015/06/18 职场文书
2016年“七一建党节”广播稿
2015/12/18 职场文书
redis实现排行榜功能
2021/05/24 Redis
零基础学java之方法的定义与调用详解
2022/04/10 Java/Android
Python 统计序列中元素的出现频度
2022/04/26 Python
JavaScript架构搭建前端监控如何采集异常数据
2022/06/25 Javascript