Download Advanced Qt Programming: Creating Great Software with C++ by Mark Summerfield PDF

By Mark Summerfield

Master Qt's strongest APIs, styles, and improvement Practices

Qt has developed right into a remarkably strong resolution for cross-platform computer, internet, and cellular improvement. despite the fact that, even the main skilled Qt programmers simply use a fragment of its functions. additionally, sensible information regarding Qt's most modern good points has been scarce—until now.

Advanced Qt Programming indicates builders precisely how you can take complete good thing about Qt 4.5's and Qt 4.6's most precious new APIs, software styles, and improvement practices. Authored through Qt specialist Mark Summerfield, this e-book concentrates on innovations that supply the main energy and adaptability with the least further complexity.

Summerfield focuses specifically on model/view and graphics/view programming, hybrid desktop/Web purposes, threading, and functions incorporating media and wealthy textual content. all through, he provides lifelike, downloadable code examples, all validated on home windows, Mac OS X, and Linux utilizing Qt 4.6 (and such a lot demonstrated on Qt 4.5) and designed to count on destiny models of Qt. The book

Walks via utilizing Qt with WebKit to create leading edge hybrid desktop/Internet applications

Shows the right way to use the Phonon framework to construct strong multimedia applications

Presents state of the art thoughts for utilizing model/view desk and tree types, QStandardItemModels, delegates, and perspectives, and for growing customized desk and tree types, delegates, and views

Explains tips to write more suitable threaded courses with the QtConcurrent module and with the QThread class

Includes specified assurance of constructing wealthy textual content editors and documents

Thoroughly covers graphics/view programming: structure, home windows, widgets, layouts, scenes, and more

Introduces Qt 4.6's strong animation and kingdom computing device frameworks

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Additional info for Advanced Qt Programming: Creating Great Software with C++ and Qt 4

Example text

Its append method is called to add one part to the other. Then you get the final string when its toString method is called. All these are done automatically. Doing this inside a loop will imply creating a large number of objects. If you write the code yourself for doing this instead of directly using string concatenation, you can significantly improve the performance of this operation. Give the garbage collector light work You cannot depend as safely and surely on the CLDC garbage collector as in J2SE.

In other words, your runtime memory budget is even more limited. Figure 2-5: Data storage structure. ♦ Make your applications small: Besides conserving runtime memory, you have to keep the size of your application in accordance with the storage available. To achieve this, you can package your application in the form of a JAR archive. Other tools that remove unnecessary information from a file may also be used to cut down the size of the application. ♦ Use of scalar types: Whenever you declare an object, it is allocated space on the runtime heap.

This is why there is only one class Connector but there are eight interfaces in this package. io package, refer to Figure 3-3. All these are listed below: ♦ Interface Connection ♦ Interface ContentConnection ♦ Interface Datagram ♦ Interface DatagramConnection ♦ Interface InputConnection ♦ Interface OutputConnection ♦ Interface StreamConnection 32 Chapter 3: CLDC API and Reference Implementation ♦ Interface StreamConnectionNotifier ♦ Class Connector Figure 3-3: CLDC Interface Hierarchy. Class connector is the only class in the package and is used to open a connection with the open method.

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