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Qt Signals & Slots: How they work

The one thing that confuses the most people in the beginning is the Signal & Slot mechanism of Qt. But it’s actually not that difficult to understand. In general Signals & Slots are used to loosely connect classes. Illustrated by the keyword emit, Signals are used to broadcast a message to all connected Slots. If no Slots are connected, the message "is lost in the wild". So a connection between Signals & Slots is like a TCP/IP connection with a few exceptions, but this metaphor will help you to get the principle. A Signal is an outgoing port and a Slot is an input only port and a Signal can be connected to multiple Slots.

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How to start with Qt?

In this series I’ll give you a starting point on working with with Qt. Like I mentioned in Why I love the Qt framework I had a hard time at the beginning. I want to give you an easier start with this awesome peace of technology. This page will serve as an index for the whole series of tutorials and explanations. As more posts follow this page will be updated. I know there are plenty of tutorials on Qt, but maybe I’ll explain some things in a way you understand better. Continue reading

Should I use Qt containers or the std ones?

If you come from plain vanilla C++, you only know the C++ Standard Library with its containers like std::vector. If you know how to use them, you can accomplish your tasks pretty fast. But if you’re coming from an other language, the naming might be a bit odd. The Qt containers offer both, C++ style and Java style naming of methods. So coming from an other language the Qt ones might be easier to use.

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Why I love the Qt framework

Everyone that knows me, knows that I love the Qt framework. Before I started programming in C++, Java was my primary programming language. I love the generics (yes, some of you will hate me for that opinion right now) and reflection. During my Java-time I used them very often to increase reusability. But while studying we had do learn C++ and I hated it in the beginning. It felt so old and so stiff compared to Java. Continue reading

How to work on your projects on multiple devices

At the beginning of my programming-life I’ve never thought of synchronization of my projects as an issue. Back at the time I only had a Computer standing in my room. Then I got a Laptop from the company I worked for back at the time. Still, synchronization was not an issue by now because I kept private and work separate. But the whole journey began when I started studying and I bought myself a Laptop. Continue reading
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