54 lines
2.0 KiB
Markdown
54 lines
2.0 KiB
Markdown
# KDSingleApplication
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`KDSingleApplication` is a helper class for single-instance policy applications
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written by [KDAB](https://www.kdab.com).
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## Usage
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Currently the documentation is woefully lacking, but see the examples or tests
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for inspiration. Basically it involves:
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1. Create a `Q(Core|Gui)Application` object.
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2. Create a `KDSingleApplication` object.
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3. Check if the current instance is *primary* (or "master") or
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*secondary* (or "slave") by calling `isPrimaryInstance`:
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* the *primary* instance needs to listen from messages coming from the
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secondary instances, by connecting a slot to the `messageReceived` signal;
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* the *secondary* instances can send messages to the primary instance
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by calling `sendMessage`.
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## Licensing
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KDSingleApplication is (C) 2019-2023, Klarälvdalens Datakonsult AB, and is available
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under the terms of the [MIT license](LICENSES/MIT.txt).
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Contact KDAB at <info@kdab.com> if you need different licensing options.
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## Get Involved
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KDAB will happily accept external contributions.
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Please submit your contributions or issue reports from our GitHub space at
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<https://github.com/KDAB/KDSingleApplication>.
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## About KDAB
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KDSingleApplication is supported and maintained by Klarälvdalens Datakonsult AB (KDAB).
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The KDAB Group is the global No.1 software consultancy for Qt, C++ and
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OpenGL applications across desktop, embedded and mobile platforms.
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The KDAB Group provides consulting and mentoring for developing Qt applications
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from scratch and in porting from all popular and legacy frameworks to Qt.
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We continue to help develop parts of Qt and are one of the major contributors
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to the Qt Project. We can give advanced or standard trainings anywhere
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around the globe on Qt as well as C++, OpenGL, 3D and more.
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Please visit <https://www.kdab.com> to meet the people who write code like this.
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Stay up-to-date with KDAB product announcements:
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* [KDAB Newsletter](https://news.kdab.com)
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* [KDAB Blogs](https://www.kdab.com/category/blogs)
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* [KDAB on Twitter](https://twitter.com/KDABQt)
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