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Qt 5 is the latest version of Qt. It enables developers to develop applications with intuitive user interfaces for multiple targets, faster than ever before. Qt 5 makes it easier to address the latest UI paradigm shifts that touch screens and tablets require. Developers can be more productive and flexible with the improved support for JavaScript and QML in Qt 5, while still having the C++ foundation and Qt Widget support. HTML5 developers will feel at home with the Web offering that includes Chromium-based Qt and Qt. Qt 5 is highly compatible with Qt 4. It is possible for developers of Qt 4 applications to seamlessly move on to Qt 5 with their current functionality and gradually develop new things leveraging all the great items Qt 5 makes possible. Cross-platform portability is made simpler in Qt 5, thanks to the new modularized codebase consisting of the modules, and the consolidation of the. The following sections summarize some of the key features that Qt 5 brings to the table. Qt Everywhere on Mobile Qt now comes with production-ready ports for Android, iOS, and. With full support for Android, iOS, and , Qt is a great solution for targeting the mobile markets with a single codebase. It is fast and easy to bring existing desktop or embedded application to mobile, by simply recompiling it. You can install several demo applications that showcase the power of Qt on these mobile platforms. Video effects created using Qt Quick. Qt Quick in Qt 5 provides the necessary infrastructure to develop QML applications. The latest version v2. Canvas provides an API that is similar to the HTML5 Canvas API, along with some additional features. This is useful for desktop applications developed using Qt Quick. Qt Quick's The module provides a number of ready-made effects for use in Qt Quick applications, including soft drop shadow, blur, glow and colorize. Excerpts from the Qt Graphical Effects module Designing UI Made Simpler Qt Quick Controls 2 Material style UI designing can be time consuming if there are not enough tools to help. Qt Quick reduces the effort considerably compared to the traditional native C or C++ approach, especially if the or and modules are used. These modules provide ready-to-use UI controls and layouts to enable faster application development with less code. For a comparison of the two sets of controls, see. Qt Quick Controls and Qt Quick Layouts provide a vast set of UI controls ranging from the most basic text field and button to the more complex stack view and tumbler. The controls are also made available in Qt Quick Designer. Sensor and Location Reacting to sensor value changes and locating a place on the world map are the common use cases supported on most portable devices. Now you can support such use cases in your Qt application using the and modules. Qt Quick nano browser is a web content rendering engine based on Chromium featuring broad support for standard web technologies. It provides integration with both Qt Quick and traditional widgets. The module brings the latest in HTML5 advancements to Qt 5, including CSS filters, animations and video, and Canvas. Multimedia provides a rich set of QML types and C++ classes to handle multimedia content. It also provides necessary APIs to access the camera and radio functionality. Qt 5 brings the Qt Multimedia module into the set of essential modules with support on all major platforms. Video embedded into a Qt Quick application with a displacement effect Platform-specific Extras Qt is a cross-platform development framework enabling you to target multiple platforms with a single codebase. It provides common APIs across all supported platforms to access a feature without having to worry about how that feature is implemented on a platform. Modularized Qt Libraries Qt 5 splits the Qt libraries into domain specific libraries and modules. This means that an application can choose which libraries it requires and only compile, use and deploy those. For a complete list of modules and libraries, see. Widgets in Qt 5 The have been separated into their own module in Qt 5, the Qt Widgets module. It is part of the essential modules. In today's world, location and maps information is more widely used, be it to look up nearby restaurants or plan commute to the office. With Qt, it is now possible to cater to these use cases by consuming map data provided by the third-party vendors. The module provides the APIs and the necessary backend to fetch map data from some of the popular third-party mapping solutions. Here is a snapshot of the demo application running on Android, presenting OpenStreetMap data from. Mapviewer example screenshot Qt Platform Abstraction The windowing system dependent parts of Qt have been completely rewritten for Qt 5, based on the Qt Platform Abstraction, a plugin architecture which allows Qt to dynamically load a windowing system integration based on what system it is running on. For instance, the Qt Linux binaries can run against both X11 and Wayland. Additionally, if your compiler supports C++11 lambdas, you can even connect directly to a lambda function. Connectivity and Networking Qt 5 provides better support for IPv6 and dual mode networks. Most applications using host names and network layer transparent protocols can now gain IPv6 support transparently. Such applications can also choose to receive both IPv4 and IPv6 connections or bind to only one of the two connection types. In the case of outgoing HTTP connections using QNetworkAccessManager, both IPv4 and IPv6 connections are attempted in parallel, and the one that succeeds first is used. This is useful in environments where one of the two types has limited connectivity. Qt 5 also provides better ways to handle TCP socket-based connections and SSL certificates. Stricter client authentication is one of the primary concerns for many applications handling confidential or critical data. The opaque Private Keys support in Qt 5 enables applications to read private keys from devices such as PKCS 11 dongles for stricter client authentication. The illustrates reading private keys from a device. Extended Connectivity The connectivity options are endless with Qt 5. The two new modules, and , enable developers to add support for sophisticated ways to connect and share information in their application. JSON Support Qt applications that use simple data structures to store small amount of data, can now choose to use JSON documents over the complex database backends that need necessary drivers or plugins to access data. The fact that JSON is a text-based open standard derived from JavaScript, makes it the obvious choice for QML applications as well. The Qt Core provides a set of classes to enable parsing and generating JSON documents. These classes also allow you to convert between an in-memory binary representation of JSON to a standard textual JSON format. The goal is to make common operations on JSON faster. User Input Qt 4 already had support for handling multi-point touch input in C++. Qt 5 extends this support to include Qt Quick, covering all the information about the touch points, including the touch position, pressure, and velocity. The mouse event handling in Qt 5 has been improved from its predecessor. Applications have more control to handle mouse events in Qt Quick. The mouse area in a QML document can propagate the mouse wheel and click events and also ignore propagated events. Besides this, Qt 5 adds support for more mouse buttons on platforms where this is supported. This comes in handy for gaming applications developed using Qt. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. All other trademarks are property of their respective owners.
