By Mark Summerfield

ISBN-10: 0321635906

ISBN-13: 9780321635907

This e-book is aimed toward current C++/Qt programmers and provides principles and thoughts which are too complicated or really good (although now not inevitably difficult), for a primary booklet on Qt.

Qt has now grown to over seven-hundred periods and good over one million phrases of documentation, a ways an excessive amount of to hide in one quantity. So rather than overlaying every thing very thinly, the ebook makes a speciality of key components of Qt expertise and attempts to supply extra finished assurance than is on hand elsewhere.

The e-book is totally functional in emphasis, with each method illustrated by way of operating code. The examples exhibit Qt top practices, and feature been established on Linux, Mac OS X, and home windows, utilizing Qt 4.6 and the place attainable (e.g., utilizing #if QT_VERSION), Qt 4.5. (The examples and a pattern bankruptcy should be downloaded from the book's website. Amazon don't permit URLs so google for "qtrac" to discover it.)

The book's major subject matters are hybrid desktop/Internet purposes, threading, wealthy textual content dealing with, Qt's graphics/view structure, and Qt's model/view structure (to which 4 chapters are devoted), even if many different subject matters are coated. in addition to every one chapter's major topic, plenty of different sessions, equipment, and methods are used at any place they make experience, to teach as many Qt gains as attainable. So even the main skilled Qt programmer may still detect facets of Qt they weren't conscious of, realize new ideas, and be encouraged with new ideas.</i>

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Extra resources for Advanced Qt Programming: Creating Great Software with C++ and Qt 4 (Prentice Hall Open Source Software Development Series)

Example text

If the user presses the New button a new pair of matrices is generated. 12. , white on black), and with a focus rectangle—here, for example, the cell containing value 116. The web page is made up of a mixture of HTML elements and standard and custom Qt widgets. The title text, the “Name:” label, and the large “+” and “=” signs are all standard HTML elements. The name line edit, the buttons, and the result label could also have been HTML elements, but for the sake of the example we have used standard Qt widgets.

Using WebKit 27 void BrowserWindow::createConnections() { connect(webView, SIGNAL(loadProgress(int)), progressBar, SLOT(setValue(int))); connect(webView, SIGNAL(urlChanged(const QUrl&)), this, SLOT(urlChange(const QUrl&))); connect(webView, SIGNAL(loadFinished(bool)), this, SLOT(loadFinish(bool))); connect(setUrlAction, SIGNAL(triggered()), this, SLOT(setUrl())); connect(historyAction, SIGNAL(triggered()), this, SLOT(popUpHistoryMenu())); connect(zoomOutAction, SIGNAL(triggered()), this, SLOT(zoomOut())); connect(zoomInAction, SIGNAL(triggered()), this, SLOT(zoomIn())); connect(zoomSpinBox, SIGNAL(valueChanged(int)), this, SLOT(setZoomFactor(int))); } We set up the first three signal–slot connections to allow us to keep track of loading progress and page changes so that we can keep the progress bar and progress label up to date.

This slightly shortens and simplifies populateToolTip()’s code and also makes it easier to modify the formatting later on. If an icon must be downloaded, once the QNetworkReply is ready, the signal–slot connection set up earlier ensures that the readIcon() slot is called. We will look at this slot in two parts. isValid()) networkIconAccess->get(QNetworkRequest(redirect)); This method is called when a request to download an icon has finished. We begin by checking to see if instead of the reply we are expecting we have received a redirect of some kind.

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Advanced Qt Programming: Creating Great Software with C++ and Qt 4 (Prentice Hall Open Source Software Development Series) by Mark Summerfield


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