Can I build qt plugin & load it in qt application?

Dariusz

Hey
I want to build a dll plugin for application that runs Qt framework but is not allowing for plugins... They have no SDK. I wonder if there is a way to build qt dll that could be loaded if placed in right place? I want to spawn a server/call local python functions. I have access to python in that app.

Any idea if any kind of hot-wireing dll like that is possible?

SGaist

Hi,

Do you mean that kind of plugin ?

Dariusz

Not sure... something that if I Copy in to root directory, qt would automatically load as Qt plugin and execute... ? Hmmmmmmm

mrjj

@Dariusz

Hi
Yes you can.
see this example (and reads the docs SGaist links)

https://doc.qt.io/qt-6/qtwidgets-tools-plugandpaint-app-example.html

Here the drawing app is extended with extra plugsins.

Do note, however, that you will need to do as sample does in
"The next step is to load dynamic plugins"

where is enumerate the files in a given folder using

 const auto entryList = pluginsDir.entryList(QDir::Files);
    for (const QString &fileName : entryList) {
        QPluginLoader loader(pluginsDir.absoluteFilePath(fileName));
...

so its not 100% automatic but almost ;)