Download C++ GUI Programming with Qt4 by Jasmin Blanchette, Mark Summerfield PDF

By Jasmin Blanchette, Mark Summerfield

This can be the publication model of the broadcast book.
The simply professional, Best-Practice consultant to Qt 4.3 Programming
Using Trolltech's Qt you could construct industrial-strength C++ functions that run natively on home windows, Linux/Unix, Mac OS X, and embedded Linux with out resource code adjustments. Now, Trolltech insiders have written a start-to-finish consultant to getting amazing effects with the newest model of Qt: Qt 4.3.
Packed with reasonable examples and in-depth recommendation, this can be the publication Trolltech makes use of to educate Qt to its personal new hires. commonly revised and elevated, it finds state-of-the-art top Qt programming styles for every thing from imposing model/view structure to utilizing Qt 4.3's enhanced portraits help. you will discover confirmed suggestions for nearly each GUI improvement job, in addition to subtle suggestions for delivering database entry, integrating XML, utilizing subclassing, composition, and extra. no matter if you are new to Qt or upgrading from an older model, this booklet may help accomplish every thing that Qt 4.3 makes possible.
- thoroughly up to date all through, with major new assurance of databases, XML, and Qtopia embedded programming
- Covers all Qt 4.2/4.3 adjustments, together with home windows Vista help, local CSS help for widget styling, and SVG dossier generation
- includes separate 2nd and 3D chapters, insurance of Qt 4.3's new images view sessions, and an advent to QPainter's OpenGL back-end
- comprises new chapters on look-and-feel customization and alertness scripting
- Illustrates Qt 4's model/view structure, plugin aid, structure administration, occasion processing, box sessions, and masses more
- provides complicated thoughts coated in no different book—from growing plugins to interfacing with local APIs
- encompasses a new appendix on Qt Jambi, the recent Java model of Qt

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Extra info for C++ GUI Programming with Qt4

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Lines 4 to 7 are forward declarations of the Qt classes that we will use to implement the dialog. A forward declaration tells the C++ compiler that a class exists, without giving all the detail that a class definition (usually located in a header file of its own) provides. We will say more about this shortly. Next, we define FindDialog as a subclass of QDialog: 8 class FindDialog : public QDialog 9 { 10 Q_OBJECT 11 public: 12 FindDialog(QWidget *parent = 0); Part I: Basic Qt 17 18 Part I: Basic Qt The Q_OBJECT macro at the beginning of the class definition is necessary for all classes that define signals or slots.

But this isn't necessary, since Qt automatically deletes child objects when the parent is destroyed, and the child widgets and layouts are all descendants of the FindDialog. Now we will look at the dialog's slots: 39 void FindDialog::findClicked() 40 { 41 QString text = lineEdit->text(); 42 Qt::CaseSensitivity cs = 43 caseCheckBox->isChecked() ? isEmpty()); 54 } The findClicked() slot is called when the user clicks the Find button. It emits the findPrevious() or the findNext() signal, depending on the Search backward option.

A More button lets the user switch between the simple and extended appearances. We will create the widget with its extended appearance in Qt Designer, and hide the secondary and tertiary keys at run-time as needed. The widget looks complicated, but it's fairly easy to do in Qt Designer. The trick is to do the primary key part first, then duplicate it twice to obtain the secondary and tertiary keys: 1. Click File|New Form and choose the "Dialog without Buttons" template. 2. Create an OK button and drag it to the top right of the form.

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