By Jasmin Blanchette

The one reputable, Best-Practice consultant to Qt 4.3 ProgrammingUsing Trolltech's Qt you could construct industrial-strength C++ purposes that run natively on home windows, Linux/Unix, Mac OS X, and embedded Linux with no resource code alterations. Now, Trolltech insiders have written a start-to-finish advisor to getting awesome effects with the newest model of Qt: Qt 4.3. full of practical examples and in-depth recommendation, this can be the e-book Trolltech makes use of to coach Qt to its personal new hires. generally revised and extended, it finds modern most sensible Qt programming styles for every thing from enforcing model/view structure to utilizing Qt 4.3's better photos help. you can find confirmed options for nearly each GUI improvement job, in addition to subtle suggestions for delivering database entry, integrating XML, utilizing subclassing, composition, and extra. even if you are new to Qt or upgrading from an older model, this ebook should help accomplish every little thing that Qt 4.3 makes attainable. thoroughly up-to-date all through, with major new assurance of databases, XML, and Qtopia embedded programmingCovers all Qt 4.2/4.3 adjustments, together with home windows Vista help, local CSS aid for widget styling, and SVG dossier generationContains separate second and 3D chapters, assurance of Qt 4.3's new photographs view sessions, and an creation to QPainter's OpenGL back-endIncludes new chapters on look-and-feel customization and alertness scriptingIllustrates Qt 4's model/view structure, plugin help, format administration, occasion processing, box periods, and lots more and plenty morePresents complex concepts coated in no different book—from developing plugins to interfacing with local APIsIncludes a brand new appendix on Qt Jambi, the recent Java model of Qt

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Extra resources for C++ GUI Programming with Qt 4 (2nd Edition) (Prentice Hall Open Source Software Development Series)

Sample text

The SIGNAL() and SLOT() macros essentially convert their argument to a string. In the examples we have seen so far, we have always connected different signals to different slots. There are other possibilities to consider. One signal can be connected to many slots: connect(slider, SIGNAL(valueChanged(int)), spinBox, SLOT(setValue(int))); connect(slider, SIGNAL(valueChanged(int)), this, SLOT(updateStatusBarIndicator(int))); When the signal is emitted, the slots are called one after the other, in an unspecified order.

Click the line editor. Make sure that the objectName property is "lineEdit". 3. Click the first button. Set the objectName property to "okButton", the enabled property to "false", the text property to "OK", and the default property to "true". 4. Click the second button. Set the objectName property to "cancelButton" and the text property to "Cancel". 5. Click the form's background to select the form itself. Set the objectName property to "GoToCellDialog" and the windowTitle property to "Go to Cell".

Now drag the bottom of the form up to make it shorter. 6. Don't spend too much time positioning the items on the form; Qt's layout managers will lay them out precisely later on. 6. The form with some widgets Set each widget's properties using Qt Designer's property editor: 1. Click the text label. Make sure that its objectName property is "label" and set the text property to "&Cell Location:". 2. Click the line editor. Make sure that the objectName property is "lineEdit". 3. Click the first button.

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