Messaging and Signaling in C++

by Jens Weller

This time it is about how to notify one part of our application that something has happened somewhere else. I will start with Qt, as it brings with signals and slots a mechanism to do exactly that. But, as I have the goal not to use Qt mainly in the UI Layer, I will also look on how to notify other parts of the application, when things are changing.

QWidgets and data

by Jens Weller

The sixt part of my series about writing applications in C++ using Qt and boost is about my thoughts on widgets and how to interact with data from them.

A generic context menu class for Qt

by Jens Weller

I didn't plan to write a second post on menus. But a reply on twitter caused me to over think my code I presented yesterday. Its not an very important part, so that I moved on once it did run. So, the simple question, why I would not connect the menus to a slot instead of using a switch was a good one. It would restructure the code, and slots are also callable from the outside world, while the switch buries the code inside a method...

Menus and Widgets in Qt

by Jens Weller

Lets start with how Qt sees and handles menus. You can easily create a window menu in the RAD Editor of QtCreator, and then add a slot for its triggered() signal. But for a context menu...

Building factories in C++ with boost::factory

by Jens Weller

boost has a small library focusing on the creation of factories as functional objects, so that boost::factory is part of boost::functional. The library offers...

Trees, tree models and treeviews in Qt

by Jens Weller

On Tuesday I've announced this new series, this is the first installment showing the progress. The first thing I did when I started to work on my new application, was to implement a generic tree class, that then is exposed through not so generic tree model to Qt. The QTreeView then simply displays the data in the tree. My goals are, that the class containing the tree it self, is independent from Qt. Yet as its used in Qt, there are a few design decisions which reflect the needs of the Qt Model View system...

Building Applications with Qt and boost

by Jens Weller

This is the start of a series of posts, in which I'll try to document my weekly work on a new application, build with Qt and boost. This first post is rather short, but I'd quickly try to give you an overview, why I use both Qt and boost in the same application. Regarding Qt, I wrote an introduction a two years ago, also for boost, there is an excellent website/tutorial about boost by Boris Schäling (buy his book! ). This series is not meant as a general introduction, yet I try to show you how and what I use of Qt and boost.

Refactoring my Qt database code

by Jens Weller

For two days I had the chance to clean up my code and do a little refactoring. One of the results is, that my database code now also uses variadic templates. For some time now, I use Qt as the UI and Database frontend of my applications...

Qt 5.4 released

I am happy to announce that Qt 5.4 has been released today and is available for download from qt.io. Together with Qt 5.4, we have also released Qt Creator 3.3 and an update to Qt for device creation on embedded Linux and embedded Android.

But let’s start with Qt 5.4. One of the main focus areas of this Qt release has been around Web technologies and we have a lot of cool new things to offer there...

HTTP and HTTPs in Qt

by Jens Weller

Last week I started to work on an old project again: My own feed reader. I found the code 2 weeks a go on an old USB Stick, and decided to refactor it into a useful state. This involved dealing with HTTP via QNetworkAccessManager.