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    <p>I recommend reading the following conceptual documents from the Qt Documentation itself:</p> <h3>The Core</h3> <ul> <li><a href="http://doc.qt.io/qt-5/object.html" rel="nofollow noreferrer"><strong>Object Model</strong></a> presents the why and how Qt extends the plain C++ object model with the metaobject compiler and what features it adds.</li> <li><a href="http://doc.qt.io/qt-5/objecttrees.html" rel="nofollow noreferrer"><strong>Object Trees and Ownership</strong></a> illustrates the preferred way of managing dynamically allocated QObjects in Qt. (Notice: <em>preferred</em>, not <em>mandatory</em>.)</li> <li><a href="http://doc.qt.io/qt-5/signalsandslots.html" rel="nofollow noreferrer"><strong>Signals and Slots</strong></a> explains this basic concept in greater depth.</li> <li><a href="http://doc.qt.io/qt-5/containers.html" rel="nofollow noreferrer"><strong>Container Classes</strong></a> presents the STL-compatible, collection-like classes adopted by the Qt API. An important concept, <a href="http://doc.qt.io/qt-5/implicit-sharing.html" rel="nofollow noreferrer">implicit sharing</a>, is also introduced.</li> <li><a href="http://doc.qt.io/qt-5/resources.html" rel="nofollow noreferrer"><strong>The Qt Resource System</strong></a> describes how data can be embedded in your program or library and accessed at runtime through a special file system.</li> <li><a href="http://blog.qt.digia.com/blog/2010/06/17/youre-doing-it-wrong/" rel="nofollow noreferrer"><strong>You're doing it wrong</strong></a> is a blog post explaining how to properly use the QThread class. This is a good read because the <a href="http://doc.qt.io/qt-5/threads-starting.html" rel="nofollow noreferrer">documentation</a> and <a href="http://doc.qt.io/qt-5/threads-mandelbrot.html" rel="nofollow noreferrer">all examples</a> are wrong.</li> <li><a href="http://doc.qt.io/qt-5/debug.html" rel="nofollow noreferrer"><strong>Debugging Techniques</strong></a> are a few debugging tips that are peculiar to Qt. In particular, it explains how to use the <code>qDebug</code> construct.</li> </ul> <p>Here's the <a href="http://doc.qt.io/qt-5/topics-core.html" rel="nofollow noreferrer">full list of core documents</a>.</p> <h3>GUI and Graphics</h3> <ul> <li><a href="http://doc.qt.io/qt-5/qtwidgets-index.html" rel="nofollow noreferrer"><strong>Widgets and Layouts</strong></a> defines what widgets are and how they are assembled on the screen.</li> <li><a href="http://doc.qt.io/qt-5/application-windows.html" rel="nofollow noreferrer"><strong>Window and Dialog Widgets</strong></a> explains the subtle difference between what Qt treats as windows and what it treats as widgets.</li> <li><a href="http://doc.qt.io/qt-5/layout.html" rel="nofollow noreferrer"><strong>Layout Management</strong></a> goes into further detail about widget layout. If you use the built in UI designer, you'll rarely need to fiddle with layout classes directly, but the concepts are nevertheless important.</li> <li><a href="http://doc.qt.io/qt-5/paintsystem.html" rel="nofollow noreferrer"><strong>Paint System</strong></a> is how Qt draws stuff. </li> <li><a href="http://doc.qt.io/qt-5/coordsys.html" rel="nofollow noreferrer"><strong>Coordinate System</strong></a> illustrates how Qt interprets graphics coordinates on painting devices.</li> <li><a href="http://doc.qt.io/qt-5/qtquick.html" rel="nofollow noreferrer"><strong>Qt Quick</strong></a> is the new way of building pretty UIs.</li> </ul> <p>Here's the full list of <a href="http://doc.qt.io/qt-5/qtquick-index.html" rel="nofollow noreferrer">GUI and Graphics documents</a>.</p> <p>By the time you understand the basics, the rest of the API is very cohesive, consistent and easy to grasp.</p>
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    1. COvery useful links :) thanks !
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      1. USVamsi Krishna B
 

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