Download Advanced Qt Programming: Creating Great Software with C++ by Mark Summerfield PDF

By Mark Summerfield

This booklet is aimed toward latest C++/Qt programmers and provides rules and concepts which are too complex or really good (although now not inevitably difficult), for a primary publication on Qt.

Qt has now grown to over seven hundred sessions and good over one million phrases of documentation, a long way an excessive amount of to hide in one quantity. So rather than protecting every little thing very thinly, the booklet makes a speciality of key parts of Qt expertise and attempts to supply extra entire assurance than is on hand elsewhere.

The publication is totally functional in emphasis, with each procedure illustrated by means 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 themes are coated. in addition to each one chapter's major topic, plenty of different sessions, equipment, and methods are used at any place they make feel, to teach as many Qt gains as attainable. So even the main skilled Qt programmer may still observe elements of Qt they weren't conscious of, detect new ideas, and be encouraged with new ideas.</i>

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Read or Download Advanced Qt Programming: Creating Great Software with C++ and Qt 4 (Prentice Hall Open Source Software Development Series) PDF

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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

Hybrid Desktop/Internet Applications QWebHistory. This holds a list of QWebHistoryItems, each of which has the web page’s title, the page’s URL, the page’s icon—Qt provides a default icon if one isn’t available from the web page’s server—and a few other pieces of information. The menu presents the links in reverse order, that is, from most recently visited at the top to least recently visited at the bottom. It also imposes a limit on the number of items shown, and eliminates duplicates—which means that the order of visiting is not strictly preserved.

This application shows pages from the NYRB (New York Review of Books) using the browser window component from the previous subsection. What makes this application stand out as more convenient to use than viewing the site in a web browser is that it offers comboboxes listing the issues and the articles within a selected issue. This gives the user an easy way of seeing what issues and articles are available and a fast way of choosing an article to read. Most of the functionality is already present in the browser window component, so we only need to concentrate on how we are going to populate the comboboxes with the correct data and how we are going to make them work.

Notice that we don’t save any settings when the application terminates; instead we save the settings (in this case there is only one) whenever they are changed. This approach has the advantage that the settings are always up to date, even when the application is running or in the face of an unexpected crash, but the disadvantage that the code for saving settings could be spread all over the place, making maintenance more error-prone. We have now finished reviewing a small application that uses the high-level and easy-to-use QNetworkAccessManager class to do basic Internet downloading.

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