By Mark Summerfield
Master Qt's strongest APIs, styles, and improvement Practices
Qt has advanced right into a remarkably strong resolution for cross-platform machine, net, and cellular improvement. notwithstanding, even the main skilled Qt programmers in basic terms use a fragment of its functions. additionally, sensible information regarding Qt's most recent gains has been scarce—until now.
Advanced Qt Programming exhibits builders precisely easy methods to take complete good thing about Qt 4.5's and Qt 4.6's most useful new APIs, program styles, and improvement practices. Authored by way of Qt specialist Mark Summerfield, this publication concentrates on strategies that supply the main strength and suppleness 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 sensible, 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 expect destiny types of Qt. The book
Walks via utilizing Qt with WebKit to create cutting edge hybrid desktop/Internet applications
Shows find out how to use the Phonon framework to construct robust multimedia applications
Presents state of the art ideas for utilizing model/view desk and tree versions, QStandardItemModels, delegates, and perspectives, and for developing customized desk and tree types, delegates, and views
Explains tips on how to write more desirable threaded courses with the QtConcurrent module and with the QThread class
Includes unique insurance 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 nation computing device frameworks
Read or Download Advanced Qt Programming: Creating Great Software with C++ and Qt 4 PDF
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Additional info for Advanced Qt Programming: Creating Great Software with C++ and Qt 4
This tag also features the android:layout_width and android:layout_height parameters, set to wrap_content, which makes sure the UI element conforms around the content inside it. Note that wrap_content is essentially the exact opposite of a match_parent parameter, which does pretty much the opposite of this and expands to fill what is outside it rather than contracting around what is inside it. xml file in your values folder, using the @string/ path to the hello_world
Once you click the Apply button, you will see the format preset applied to your Source AVI right underneath it, as shown in Figure 2-27. Make sure that you see this before you click the Squeeze It! button in the bottom right corner of the software (you can see this button in Figure 2-25). 58 CHAPTER 2: Android Digital Video: Formats, Concepts, and Optimization Once you click the Squeeze It! button you will get a blue progress bar, which is shown on the right-hand side in Figure 2-27, and next to the Job status bar at the top of your Project Settings area at the bottom of the Squeeze software.
Later on in the book I will show you how to scale video to fit different aspect ratio screens, as long as the content you are non-aspect-ratio scaling is not prone to noticeable distortion (like a talking head video would clearly be). Change the RelativeLayout opening and closing tags to FrameLayout and keep the xmlns:android and android:layout parameters, which as you now know are required. Then, change the TextView child tag to a VideoView and change its android:id to @+id/splashScreenVideo. Remove the android:text parameter and reference, as you will not be using it with your VideoView UI widget.
Advanced Qt Programming: Creating Great Software with C++ and Qt 4 by Mark Summerfield