To integrate a custom widget with Qt Designer, you require a suitable description for the widget and an appropriate project file.

[jdent]

Does the project file need to be a DLL or can it be an EXE? What modules should we include? How about core;gui;widgets;sql;charts;designer?

I am using VS Tools for Qt... which project type should I create?

Qt Designer custom widget?

Qt Class Library?

Qt Widgets application?

It seems to me that the first is the correct one... am I right? don't I need to export the custom widget? in VS that would mean __declspec(dllexport) but that is not present in the generated code....?? maybe there is some macro in Qt for this.....

[Pl45m4]

@jdent

Since you took the title of this topic from here, I think you already found the documentation page about creating Qt Designer Plugins.

How about core;gui;widgets;sql;charts;designer?

Here is an example:

• https://doc.qt.io/qt-6/designer-creating-custom-widgets.html#a-simple-plugin

You also need Qt::UiPlugin

and need to install your app to the place where your Qt Designer looks for plugins (QT_INSTALL_PLUGINS/ QT6_INSTALL_PLUGINS).

Here you can find another simple but complete plugin example:

• https://doc.qt.io/qt-6/qtdesigner-customwidgetplugin-example.html

[jdent]

@Pl45m4 only one thing: which project type should I create in Visual Studio? Qt Designer custom widget? do we need to export the widget?

__declspec(dllexport)??

The only problem is the examples are for use in Qt Creator I think while I am in Visual Studio... is there a VS example?
How can I find the value of the macros like $$[QT_INSTALL_PLUGINS] and ${INSTALL_EXAMPLEDIR}?