Linux窗口程序设计—Qt4精彩实例分析源码_java程序设计题目资源-CSDN文库

共817个文件

cpp：150个

png：98个

h：90个

Linux

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Linux窗口程序设计—Qt4精彩实例分析源码在深入探讨Qt4的窗口程序设计之前，我们首先要明白，Qt是一个跨平台的应用程序开发框架，它支持包括Linux在内的多个操作系统。Qt4是Qt的一个重要版本，提供了丰富的图形用户界面（GUI）组件和工具，使得开发者能够轻松创建出美观且功能强大的应用程序。本书的源码涵盖了各种Qt4窗口程序设计的经典实例，通过这些实例，我们可以学习到如何在Linux环境下使用Qt4进行开发。Qt4的核心在于其信号与槽机制，这是一种事件驱动的编程模型，它简化了对象间的通信，使代码更加整洁、易于维护。在源码中，你可以看到信号和槽是如何被用来响应用户操作和应用程序内部状态变化的。 Qt4提供了丰富的Widget库，包括按钮、文本框、菜单、对话框等基本元素。通过实例，我们可以学习如何布局这些控件，创建符合用户习惯的交互界面。QLayout类是布局管理的关键，它可以自动调整控件的位置和大小，适应不同屏幕尺寸。此外，QStackedWidget和QTabWidget等复合控件则可以帮助我们构建更复杂的界面结构。在Qt4中，图形绘制主要通过QPainter类实现。源码中可能包含使用QPainter绘制自定义图形的例子，例如图表、曲线或者复杂的2D图案。这涉及到坐标系统、画刷、画笔、路径等概念，是理解Qt4图形系统的重要部分。对于网络编程，Qt4的QNetworkAccessManager和相关类提供了一套完整的API，可以方便地进行HTTP、FTP等协议的请求。源码中可能有网络应用实例，如下载、上传或者网页浏览功能。数据库操作在Qt4中由QSql模块处理，通过QSqlDatabase、QSqlQuery等类，开发者可以轻松地连接和操作各种数据库，如MySQL、SQLite等。源码中的例子会展示如何进行数据查询、插入、更新和删除操作。除此之外，Qt4还支持多线程编程，QThread类和相关的同步机制如信号量、互斥锁等，让开发者能够在多核环境下优化程序性能。在源码中，你可能会看到如何在不同的线程中执行任务，以及如何处理线程间的通信。 "Linux窗口程序设计—Qt4精彩实例分析源码"是一个宝贵的资源，它可以帮助我们掌握Qt4在Linux下的窗口程序设计，从基础的GUI组件使用，到复杂的网络和数据库操作，再到多线程编程，都能在实践中得到锻炼和提升。通过逐一分析和运行这些源码，开发者能够深入理解Qt4的机制，并运用到自己的项目中。

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Linux窗口程序设计—Qt4精彩实例分析源码（817个子文件）

128-1.bmp 2KB

127-1.bmp 2KB

butterfly 34KB

combine 60KB

mainwidget.cpp 10KB

cursor.cpp 7KB

mainwidget.cpp 6KB

histogramview.cpp 6KB

imgprocessor.cpp 6KB

palette.cpp 5KB

fileinformation.cpp 5KB

listalign.cpp 5KB

drawer.cpp 4KB

table.cpp 4KB

httpclient.cpp 4KB

eventfilter.cpp 4KB

mapwidget.cpp 4KB

messagebox.cpp 4KB

tcpclient.cpp 4KB

ftpclient.cpp 4KB

fontset.cpp 4KB

stringcodec.cpp 4KB

mainwidget.cpp 4KB

mainwindow.cpp 3KB

inputdialog.cpp 3KB

mainwindow.cpp 3KB

layoutdlg.cpp 3KB

geometry.cpp 3KB

mainwidget.cpp 3KB

style.cpp 3KB

baseinfo.cpp 3KB

pararw.cpp 3KB

mainwidget.cpp 3KB

extension.cpp 2KB

standarddialogs.cpp 2KB

mainwindow.cpp 2KB

networkinformation.cpp 2KB

keyevent.cpp 2KB

mainwidget.cpp 2KB

main.cpp 2KB

painter.cpp 2KB

progress.cpp 2KB

configdialog.cpp 2KB

stringlistmodel.cpp 2KB

dragwidget.cpp 2KB

paintarea.cpp 2KB

settings.cpp 2KB

mouseevent.cpp 2KB

printimage.cpp 2KB

paintarea.cpp 2KB

fileviewer.cpp 2KB

pictrans.cpp 2KB

contact.cpp 2KB

dragwidget.cpp 2KB

butterfly.cpp 2KB

drawwidget.cpp 2KB

udpserver.cpp 1KB

combodelegate.cpp 1KB

mainwindow.cpp 1KB

printtext.cpp 1KB

toolbar.cpp 1KB

datedelegate.cpp 1KB

dockwindows.cpp 1KB

udpclient.cpp 1KB

tcpserver.cpp 1KB

paintarea.cpp 1KB

detail.cpp 1KB

digiclock.cpp 1KB

paintarea.cpp 1KB

graphicsitem.cpp 1KB

spindelegate.cpp 1KB

svgwindow.cpp 1KB

main.cpp 1KB

server.cpp 1KB

dragicon.cpp 1KB

content.cpp 1KB

main.cpp 1KB

draglabel.cpp 1002B

stack.cpp 986B

main.cpp 956B

fader.cpp 950B

shapewidget.cpp 935B

rubberband.cpp 879B

main.cpp 857B

mywidget.cpp 791B

items.cpp 750B

mainwindow.cpp 720B

mywidget.cpp 678B

tcpclientsocket.cpp 651B

svgwidget.cpp 609B

main.cpp 561B

main.cpp 455B

main.cpp 437B

main.cpp 416B

main.cpp 412B

共 817 条

Detailed Description The QPrinter class is a paint device that paints on a printer. This device represents a series of pages of printed output, and is used in almost exactly the same way as other paint devices such as QWidget and QPixmap. A set of additional functions are provided to manage device-specific features, such as orientation and resolution, and to step through the pages in a document as it is generated. When printing directly to a printer on Windows or Mac OS X, QPrinter uses the built-in printer drivers. On X11, QPrinter uses the Common Unix Printing System (CUPS) or the standard Unix lpr utility to send PostScript or PDF output to the printer. As an alternative, the printProgram() function can be used to specify the command or utility to use instead of the system default. QPrinter supports a number of parameters, most of which can be changed by the end user through a print dialog. In general, QPrinter passes these functions onto the underlying QPrintEngine. The most important parameters are: setOrientation() tells QPrinter which page orientation to use. setPageSize() tells QPrinter what page size to expect from the printer. setResolution() tells QPrinter what resolution you wish the printer to provide, in dots per inch (DPI). setFullPage() tells QPrinter whether you want to deal with the full page or just with the part the printer can draw on. setNumCopies() tells QPrinter how many copies of the document it should print. Many of these functions can only be called before the actual printing begins (i.e., before QPainter::begin() is called). This usually makes sense because, for example, it's not possible to change the number of copies when you are halfway through printing. There are also some settings that the user sets (through the printer dialog) and that applications are expected to obey. See QAbstractPrintDialog's documentation for more details. When QPainter::begin() is called, the QPrinter it operates on is prepared for a new page, enabling the QPainter to be used immediately to paint the first page in a document. Once the first page has been painted, newPage() can be called to request a new blank page to paint on, or QPainter::end() can be called to finish printing. The second page and all following pages are prepared using a call to newPage() before they are painted. The first page in a document does not need to be preceded by a call to newPage(). You only need to calling newPage() after QPainter::begin() if you need to insert a blank page at the beginning of a printed document. Similarly, calling newPage() after the last page in a document is painted will result in a trailing blank page appended to the end of the printed document. If you want to abort the print job, abort() will try its best to stop printing. It may cancel the entire job or just part of it. Since QPrinter can print to any QPrintEngine subclass, it is possible to extend printing support to cover new types of printing subsystem by subclassing QPrintEngine and reimplementing its interface. See also QPrintDialog and Printing with Qt.

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