Fedora Workstation is all about Gnome and it has been since the beginning, but that doesn’t mean we don’t care about Qt applications, the opposite is true. Many users use Qt applications, even on Gnome, mainly because many KDE/Qt applications don’t have adequate replacement written in Gtk or they are just used to them and don’t really have reason to switch to another one.
For Qt integration, there is some sort of Gnome support in Qt itself, which includes a platform theme reading Gnome configuration, like fonts and icons. This platform theme also provides native file dialogs, but don’t expect native look of Qt applications. There used to be a gtk2 style, which used gtk calls directly to render natively looking Qt widgets, but it was moved from qtbase to qt5-styleplugins, because it cannot be used today in combination with gtk3.
For reasons mentioned above, we have been working on a Qt style to make Qt applications look natively in Gnome. This style is named adwaita-qt and from the name you can guess that it makes Qt applications look like Gtk applications with Adwaita style. Adwaita-qt is actually not a new project, it’s been there for years and it was developed by Martin Bříza. Unfortunately, Martin left Red Hat long time ago and since then a new version of Gnome’s Adwaita was released, completely changing colors and made the Adwaita theme look more modern. Being the one who takes care of these things nowadays, I started slowly updating adwaita-qt to make it look like the current Gnome Adwaita theme and voilà, a new version was released after 3 months of intermittent work. You can see the results here:
Isn’t it beatiful? The theme is far from being perfect and there will definitely be still some minor issues, but writting a Qt style is far from being an easy task as the QStyle class is quite complex. If you find any issue, you can open a bug and I will try to fix it. You can also send me patches if you decide to fix something yourself (I will be happy for that). The repository is hosted on GitHub under FedoraQt/adwaita-qt.
And of course it was a lie, the screenshots above are the old version of adwaita-qt (for comparison), the new ones are actually here:
I hope you like it more now :).