nrl:maxCardinality one-to-many ontology changes
I added support for changing the nrl:maxCardinality property of an rdfs:Property from one to many. Earlier Martyn Russel reverted such an ontology change as this was a blocker for the Debian packaging...
View ArticleGebruik maken van verbanden tussen metadata
Ik beweerde onlangs ergens dat een systeem dat verbanden (waar, wanneer, met wie, waarom) in plaats van louter metadata (titel, datum, auteur, enz.) over content verzamelt een oplossing zou kunnen...
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Composition and aggregation with QObject
Consider these rather simple relationships between classes Continuing on this subject, here are some code examples. Class1 & Class2: Composition An instance of Class1 can not exist without an...
View ArticleLoading truly truly huge text files with a QAbstractListModel
Sometimes people want to do crazy stuff like loading a gigabyte sized plain text file into a Qt view that can handle QAbstractListModel. Like for example a QML ListView. You know, the kind of files you...
View ArticleTruly huge files and the problem of continuous virtual address space
As we all know does mmap, or even worse on Windows CreateFileMapping, need contiguous virtual address space for a given mapping size. That can become a problem when you want to load a file of a...
View ArticleScrum is (best done) like a soccer team
As a freelancer I saw many companies, many situations and worked with many Project Managers, Product Owners, Scrum Masters and god knows what names the HR department came up with. What is most...
View ArticleHow to expose a QList in a ViewModel to QML
MyPlugin/MyPlugin.cpp: #include <ViewModels/MyListClass.h> #include <ViewModels/DisplayViewModel.h> qmlRegisterUncreatableType<MyListClass>( a_uri, 1, 0, "MyListClass", "Use access...
View ArticlePerfection
Perfection has been reached not when there is nothing left to add, but when there is nothing left to take away.
View ArticleAsynchronous undoable and redoable APIs
Combining QFuture with QUndoCommand made a lot of sense for us. The undo and the redo methods of the QUndoCommand can also be asynchronous, of course. We wanted to use QFuture without involving...
View ArticleHow do they do it? Asynchronous undo and redo editors
Imagine we want an editor that has undo and redo capability. But the operations on the editor are all asynchronous. This implies that also undo and redo are asynchronous operations. We want all this to...
View ArticleAbstractCommand Model View ViewModel techniques
In the .NET XAML world, you have the ICommand, the CompositeCommand and the DelegateCommand. You use these commands to in a declarative way bind them as properties to XAML components like menu items...
View ArticleThe RelayCommand in Qt
A few days ago I explained how we can do MVVM techniques like ICommand in Qt. Today I’ll explain how to make and use a simple version of the, in the XAML MVVM world quite famous, RelayCommand. In the...
View ArticleAsynchronous commands
With asynchronous commands we have typical commands from the Model View ViewModel world that return asynchronously. Whenever that happens we want result reporting and progress reporting. We basically...
View ArticleMetaclasses, generative C++
This is awesome: Youtube-link Youtube-link Youtube-link Paper on the proposal Blog about it by Herb Sutter Live demo with Clang
View ArticleDoing it right, making libraries using popular build environments
Enough with the political posts! Making libraries that are both API and libtool versioned with qmake, how do they do it? I started a project on github that will collect what I will call “doing it...
View ArticleDoing It Right examples on autotools, qmake, cmake and meson
About I finished my earlier work on build environment examples. Illustrating how to do versioning on shared object files right with autotools, qmake, cmake and meson. You can find it here. The DIR...
View ArticleVersionering van je product, dit opbergen in een versie controle systeem
Het komt uiteraard van één of ander forum. Maar ik wilde dit dus toch eventjes vereeuwigen in één van mijn fameuze ontzettend belangrijke blog posts. Zodat de ganse wereld het voor goed zou kunnen...
View ArticleImproving Qt
We are a few years further. A few years in which we all tried to make a difference. I’m incredibly proud of my achievement of QTBUG-61928. At the time I thought I could never convince the Qt...
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