Jesper K. Pedersen

Making widgets into standalone plugins can be challenging if they weren't carefully designed during development. A solution is restructuring your application into a library plus simple main function using that library. This episode covers everything needed for this architectural transformation to enable proper widget plugin extraction.

Before you create a plugin, your classes may be configured using constructors like: class Wishes { public: Wishes(bool isExclusive, const QColor& color, QWidget* parent); ... } But how do you handle these parameters if your constructors can't take anything but the parent pointer? This episode will discuss a few different possible solutions.

In this first episode on developing plugins for Qt Designer, we will discuss the widget promotion feature and its shortcomings compared to plugins. This is the first video out of 6 on this topic. So, stay tuned!

In your code, you will likely find numerous places where you go from an enum to a QString and back. This video shows you the smart way to do it, using Qt's introspection facilities.

A nice feature of QListView and QTreeView is that the user can adapt the width of the columns using the mouse. A problem with that, however, is what to do if the column width is not wide enough to show all text. In this episode we will present an adapter that allows your model to provide multiple different strings the view can choose from.

In this final episode, you will learn about how the templates are moved to specific sections, and I'll also share with you an "install" script that you (and your co-workers) can use to get the templates copied to the right place.

In this third video of the series on developing document templates for Qt Creator, we will see how we can ask the user for additional input in the "new file" dialog, and use that in the templates.

Learn how to create custom document templates in Qt Creator through these four videos. This episode shows how to add a new .ui file to the generated file set, providing deeper insight into Qt Creator's macro system.

Learn how to create custom document templates in Qt Creator through these four videos. This first episode creates a simple class template based on the "C++ class" template, explains macro usage, and shows how macros expand into class names from the "new file" dialog.

I use many custom classes like Money, PercentageValue, and TimeValue with model/view. For years I've written `return QVariant::fromValue(cost);` in my QAbstractItemModel data methods. This short video shows a simple trick to avoid this.

In this video, we'll see how to examine a stack of proxy models using GammaRay, the Qt swiss-army knife. There are a couple of tips and tricks for you, to let you know how GammaRay works under the hood.

In this video, we talk about QSortFilterProxyModel, a proxy model class that sorts and filters a given source model. QSortFilterProxyModel is a concrete class and can either be used as-is, or subclassed in order to fine tune some of its behaviors.

In this video, we discuss the basics of model/view programming with Qt/QML. How do we expose a set of data (a list, a table, etc.) from the business logic to C++? How much flexibility do we have before the data actually reaches QML?

Proxy models allow sorting, filtering, modifying, transforming, and augmenting existing models without changing the original model. Instead of building complicated model classes with many options, you can simplify implementation and separate concerns using proxy models.

This video gives you my top seven shortcuts in Qt Creator that help me save hours (OK, maybe just minutes) every single day, but, much more importantly, ensures I stay focused on whatever problem I'm solving right now.

This video shows how you can use your own custom types to communicate between a model and a delegate editing these custom types. My example is a Money class which contains a currency and an amount. The delegate will see Money instances, rather than parse them from their string representation.

In this module we'll use the knowledge that we gained in module 7, QObject, signals, slots, properties, variants, in order to make C++ and QML talk to each other. In this first video, we are going to show how we can export objects of value classes (numbers, strings, etc.) from C++ to QML.

This video shows how to export QObject subclasses to QML. While similar to the previous video, QObjects aren't value classes and add features like properties, signals, and slots via the meta-object system. We get all these features when exporting QObjects to QML!

When QObjects in C++ are exposed to QML, who manages their lifetime? Can QML's garbage collector reclaim them if they're still needed in C++? What happens if C++ doesn't delete them, expecting QML to handle it? This video explores object ownership between C++ and QML.

This video discusses how to create GUI elements in C++, and make them available to QML. It's just as simple as creating non-GUI elements, with a very small twist.