By Mark Summerfield
Master Qt's strongest APIs, styles, and improvement Practices
Qt has developed right into a remarkably robust resolution for cross-platform machine, net, and cellular improvement. although, even the main skilled Qt programmers in basic terms use a fragment of its features. furthermore, useful information regarding Qt's most modern positive aspects has been scarce—until now.
Advanced Qt Programming exhibits builders precisely the best way to take complete benefit of Qt 4.5's and Qt 4.6's Most worthy new APIs, program styles, and improvement practices. Authored by means of Qt specialist Mark Summerfield, this e-book concentrates on recommendations that supply the main energy and adaptability with the least additional complexity.
Summerfield focuses specially 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 proven on home windows, Mac OS X, and Linux utilizing Qt 4.6 (and so much verified 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 tips to use the Phonon framework to construct strong multimedia applications
Presents state of the art recommendations for utilizing model/view desk and tree types, QStandardItemModels, delegates, and perspectives, and for growing customized desk and tree types, delegates, and views
Explains the best way to write more advantageous threaded courses with the QtConcurrent module and with the QThread class
Includes certain assurance of making wealthy textual content editors and documents
Thoroughly covers graphics/view programming: structure, home windows, widgets, layouts, scenes, and more
Introduces Qt 4.6's robust animation and country computer frameworks
Read Online 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
The servos must also be powered on (line 8) before the arm can be used. 3 Reading and Controlling the Devices 29 Note that the arm can shake for up to 2 seconds after powering on and if it is told to move before it stops shaking then it can shake even more violently. The powerOn() method of the ArP2Arm class waits 2 seconds by default but it is advisable to include an extra sleep statement as an added precaution (line 9). The joints in the arm can be controlled by using the ArP2Arm::moveTo() method.
Once you have saved all the lookup tables and the configuration file you can close ACTS on the remote PC. lut
The polar region is specified by the startAngle and endAngle attributes (in degrees). This goes counterclockwise (negative degrees to positive). For example if you want the slice between -45 and 45 degrees, you must enter it as -45, 45. 1 below shows the angular positions ARIA assigns to each of the sonar on the Pioneer robots. The closest reading is returned by the method, but is the distance from the object to the assumed centre of the robot. To obtain the absolute distance the robot radius should be subtracted.
Advanced Qt Programming: Creating Great Software with C++ and Qt 4 by Mark Summerfield