pyqt4的一些相关资料整理

1 python qt gui 源代码下载

2 qt资料大全

下面的书籍截取自qt资料大全网页，仅供参考

书籍

• 《QmlBook》 - A Book about Qt5：

  • 英文版：http://qmlbook.github.io
  • 中文版：https://github.com/cwc1987/QmlBook-In-Chinese

• 书名：《C++ Primer plus》
  作者：Stephen Prata
  介绍：从入门到精通必读经典教程。它被誉为“开发人员学习C++的教程，没有之一”！
  

• 书名：《C++ Primer》
  作者：Stanley B. Lippman、Josee Lajoie、Barbara E. Moo
  介绍：久负盛名的经典教程，系统全面地介绍了C++，可以看成是学习C++的百科全书，C++程序猿必备。
  

• 书名：《C++ GUI Qt 4编程》
  作者：Jasmin Blanchette、Mark Summerfield
  介绍：Trolltech的Qt培训教材，生动、全面、深刻地阐明了Qt程序的设计理念，轻松创建跨平台的解决方案。
  

• 书名：《Qt高级编程》
  作者：Mark Summerfield
  介绍：阐述Qt高级编程技术的书籍。以工程实践为主旨，是对Qt现有的700多个类和上百万字参考文档中部分关键技术深入、全面的讲解和探讨。
  

• 书名：《Python Qt GUI快速编程》
  作者：Mark Summerfield
  介绍：讲述如何利用Python和Qt开发GUI应用程序的原理、方法和关键技术。结构合理，内容详实，适合用作对Python、Qt和PyQt编程感兴趣的童鞋。
  

• 书名：《C++ Qt设计模式》
  作者： Alan Ezust
  介绍：利用跨平台开源软件开发框架Qt阐释了C++和设计模式中的主要思想，既复习了设计模式，又学了C++/Qt，对于使用其它框架也是一个非常有用的参考。
  

• 书名：《Qt5开发实战》
  作者：金大zhen、张红艳 译
  介绍：在全面阐述Qt基本功能的基础上，对新增的功能和服务进行了重点介绍。同时运用大量示例，集中讲解了应用程序的开发方法、技巧和必需的API。
  

• 书名：《Qt5开发及实例》
  作者：陆文周
  介绍：以Qt5.4为平台，循序渐进，在介绍开发环境的基础上，系统介绍Qt5应用程序的开发技术，通过实例介绍和讲解内容，将知识和能力融为一体。一般能够在比较短的时间内掌握Qt5应用技术。
  

• 书名：《Qt on Android 核心编程》
  作者：安晓辉
  介绍：基于Qt 5.2，详细讲述如何在移动平台Android上使用Qt框架进行开发。无论是专注于传统的桌面软件开发，还是希望尝试使用Qt在Android平台开发，都可以从中获得重要的知识与实例。
  

• 书名：《Qt Quick核心编程》
  作者：安晓辉
  介绍：着力于QML语言基础、事件、Qt Quick基本元素，辅以简要的ECMAScript（JavaScript）语言介绍，能够快速熟悉Qt Quick的基本知识和开发过程，详尽入微。
  

• 书名：《Qt Creator快速入门 》
  作者：霍亚飞
  介绍：基于Qt Creator编写，全面涉及 Qt Quick；植根于 Qt 网络博客教程，可无限更新；对每个知识点详尽讲解，并设计了示例程序。
  

• 书名：《Qt5编程入门》
  作者：霍亚飞、devbean
  介绍：基于Qt5.3编写，全面涉及 Qt Quick；植根于 Qt 网络博客教程，可无限更新；对每个知识点详尽讲解，并设计了示例程序。
  

• 书名：《精通Qt4编程》
  作者：蔡志明 等编
  介绍：详细介绍了Qt的基础知识和GUI编程应用，举例翔实，内容全面，基本涵盖了Qt编程的各个方面。
  

• 书名：《Linux环境下Qt4图形界面与MySQL编程》
  作者：邱铁
  介绍：基于Qt4.7，采用“深入分析控件+实例解析”的方式，配合实际工程项目，对Linux操作系统下的Qt与MySQL编程技术进行了全面细致的讲解。
  

• 书名：《Linux Qt GUI开发详解》
  作者：李彬
  介绍：介绍了Linux下Qt用户界面开发的重要的核心知识，从基础界面控件使用开始，中间又详细讲解了QtWebKit的开发，语言通俗易懂，通过实例演示强化读者对章节知识点的掌握，以提高读者的实战水平及经验。
  

• 书名：《零基础学Qt4编程》
  作者：吴迪
  介绍：针对初学者写的，很详细，如果看了还不会的话，那也是没谁了！
  

源码分析

#!/usr/bin/env python# Copyright (c) 2007-8 Qtrac Ltd. All rights reserved.# This program or module is free software: you can redistribute it and/or# modify it under the terms of the GNU General Public License as published# by the Free Software Foundation, either version 2 of the License, or# version 3 of the License, or (at your option) any later version. It is# provided for educational purposes and is distributed in the hope that# it will be useful, but WITHOUT ANY WARRANTY; without even the implied# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See# the GNU General Public License for more details.import osimport sysfrom PyQt4.QtCore import *from PyQt4.QtGui import *from PyQt4.QtSql import *import qrc_resourcesMAC = "qt_mac_set_native_menubar" in dir()ID = 0NAME = ASSETID = 1CATEGORYID = DATE = DESCRIPTION = 2ROOM = ACTIONID = 3ACQUIRED = 1def 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 = range(1, 12) + 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 = QVariant("%02d%02d" % (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", QVariant(name))            query.bindValue(":categoryid", QVariant(category))            query.bindValue(":room", room)            query.exec_()            logQuery.bindValue(":assetid", QVariant(assetid))            when = today.addDays(-random.randint(7, 1500))            logQuery.bindValue(":date", QVariant(when))            logQuery.bindValue(":actionid", QVariant(ACQUIRED))            logQuery.exec_()            if random.random() > 0.7:                logQuery.bindValue(":assetid", QVariant(assetid))                when = when.addDays(random.randint(1, 1500))                if when <= today:                    logQuery.bindValue(":date", QVariant(when))                    logQuery.bindValue(":actionid",                            QVariant(random.choice((2, 4))))                    logQuery.exec_()            assetid += 1        if random.random() > 0.8:            name, category = random.choice(printers)            query.bindValue(":name", QVariant(name))            query.bindValue(":categoryid", QVariant(category))            query.bindValue(":room", room)            query.exec_()            logQuery.bindValue(":assetid", QVariant(assetid))            when = today.addDays(-random.randint(7, 1500))            logQuery.bindValue(":date", QVariant(when))            logQuery.bindValue(":actionid", QVariant(ACQUIRED))            logQuery.exec_()            if random.random() > 0.6:                logQuery.bindValue(":assetid", QVariant(assetid))                when = when.addDays(random.randint(1, 1500))                if when <= today:                    logQuery.bindValue(":date", QVariant(when))                    logQuery.bindValue(":actionid",                            QVariant(random.choice((2, 4))))                    logQuery.exec_()            assetid += 1        if random.random() > 0.6:            name, category = random.choice(electrical)            query.bindValue(":name", QVariant(name))            query.bindValue(":categoryid", QVariant(category))            query.bindValue(":room", room)            query.exec_()            logQuery.bindValue(":assetid", QVariant(assetid))            when = today.addDays(-random.randint(7, 1500))            logQuery.bindValue(":date", QVariant(when))            logQuery.bindValue(":actionid", QVariant(ACQUIRED))            logQuery.exec_()            if random.random() > 0.5:                logQuery.bindValue(":assetid", QVariant(assetid))                when = when.addDays(random.randint(1, 1500))                if when <= today:                    logQuery.bindValue(":date", QVariant(when))                    logQuery.bindValue(":actionid",                            QVariant(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).toInt()[0]        name = unicode(query.value(1).toString())        categoryid = query.value(2).toInt()[0]        room = unicode(query.value(3).toString())        categoryQuery.exec_(QString("SELECT name FROM categories "                                    "WHERE id = %1").arg(categoryid))        category = "%d" % categoryid        if categoryQuery.next():            category = unicode(categoryQuery.value(0).toString())        print "%d: %s [%s] %s" % (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,                QVariant("ID"))        self.model.setHeaderData(NAME, Qt.Horizontal,                QVariant("Name"))        self.model.setHeaderData(DESCRIPTION, Qt.Horizontal,                QVariant("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)        self.connect(addButton, SIGNAL("clicked()"), self.addRecord)        self.connect(deleteButton, SIGNAL("clicked()"),                     self.deleteRecord)        self.connect(okButton, SIGNAL("clicked()"), self.accept)        self.setWindowTitle(                "Asset Manager - Edit %s Reference Data" % 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).toInt()[0]        table = self.model.tableName()        query = QSqlQuery()        if table == "actions":            query.exec_(QString("SELECT COUNT(*) FROM logs "                                "WHERE actionid = %1").arg(id))        elif table == "categories":            query.exec_(QString("SELECT COUNT(*) FROM assets "                                "WHERE categoryid = %1").arg(id))        count = 0        if query.next():            count = query.value(0).toInt()[0]        if count:            QMessageBox.information(self,                    QString("Delete %1").arg(table),                    QString("Cannot delete %1<br>"                            "from the %2 table because it is used by "                            "%3 records") \                    .arg(record.value(NAME).toString())                    .arg(table).arg(count))            #QSqlDatabase.database().rollback()            return        self.model.removeRow(index.row())        self.model.submitAll()        #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).toString()            editor.setText(text)        else:            QSqlRelationalDelegate.setEditorData(self, editor, index)    def setModelData(self, editor, model, index):        if index.column() == ROOM:            model.setData(index, QVariant(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).toInt()[0] == \           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).toDate()            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,                QVariant("ID"))        self.assetModel.setHeaderData(NAME, Qt.Horizontal,                QVariant("Name"))        self.assetModel.setHeaderData(CATEGORYID, Qt.Horizontal,                QVariant("Category"))        self.assetModel.setHeaderData(ROOM, Qt.Horizontal,                QVariant("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,                QVariant("Date"))        self.logModel.setHeaderData(ACTIONID, Qt.Horizontal,                QVariant("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.connect(addAssetButton, SIGNAL("clicked()"),                     self.addAsset)        self.connect(deleteAssetButton, SIGNAL("clicked()"),                     self.deleteAsset)        self.connect(addActionButton, SIGNAL("clicked()"),                     self.addAction)        self.connect(deleteActionButton, SIGNAL("clicked()"),                     self.deleteAction)        self.connect(editActionsButton, SIGNAL("clicked()"),                     self.editActions)        self.connect(editCategoriesButton, SIGNAL("clicked()"),                     self.editCategories)        self.connect(quitButton, SIGNAL("clicked()"), 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())            id = record.value("id").toInt()[0]            self.logModel.setFilter(QString("assetid = %1").arg(id))        else:            self.logModel.setFilter("assetid = -1")        self.logModel.reset() # workaround for Qt <= 4.3.3/SQLite bug        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)    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).toInt()[0]        query.prepare("INSERT INTO logs (assetid, date, actionid) "                      "VALUES (:assetid, :date, :actionid)")        query.bindValue(":assetid", QVariant(assetid + 1))        query.bindValue(":date", QVariant(QDate.currentDate()))        query.bindValue(":actionid", QVariant(ACQUIRED))        query.exec_()        QSqlDatabase.database().commit()        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).toInt()[0]        logrecords = 1        query = QSqlQuery(QString("SELECT COUNT(*) FROM logs "                                  "WHERE assetid = %1").arg(assetid))        if query.next():            logrecords = query.value(0).toInt()[0]        msg = QString("<font color=red>Delete</font><br><b>%1</b>"                      "<br>from room %2") \                      .arg(record.value(NAME).toString()) \                      .arg(record.value(ROOM).toString())        if logrecords > 1:            msg += QString(", along with %1 log records") \                   .arg(logrecords)        msg += "?"        if QMessageBox.question(self, "Delete Asset", msg,                QMessageBox.Yes|QMessageBox.No) == QMessageBox.No:            QSqlDatabase.database().rollback()            return        query.exec_(QString("DELETE FROM logs WHERE assetid = %1") \                    .arg(assetid))        self.assetModel.removeRow(index.row())        self.assetModel.submitAll()        QSqlDatabase.database().commit()        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).toInt()[0]        row = self.logModel.rowCount()        self.logModel.insertRow(row)        self.logModel.setData(self.logModel.index(row, ASSETID),                              QVariant(assetid))        self.logModel.setData(self.logModel.index(row, DATE),                              QVariant(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).toString()        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 = unicode(record.value(DATE).toString())        if QMessageBox.question(self, "Delete Log",                "Delete log<br>%s %s?" % (when, action),                QMessageBox.Yes|QMessageBox.No) == QMessageBox.No:            return        self.logModel.removeRow(index.row())        self.logModel.submitAll()    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",            QString("Database Error: %1").arg(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 dbmain()