Custom widget with custom widgets in Qt Creator (Designer)

[Texture]

Hello all!

I am trying to use my custom widget containing another custom widget. Creating and using separate custom widgets causes no problem (I create .so lib for plugin, put it to <QtPath>/plugins/designer/, put plugin header to ~/QtPluginHeaders and use this path with INCLUDEPATH in pro files).

So I have created ToggleSwitch widget and respective plugin, added it into QtCreator and everything is ok.
Now I want to create new one widget with my ToggleSwitch widget. After doing the same things (adding to QtCreator) my QtCreator app crashes (while opening *.ui file in QtCreator) with the following error:

./qtcreator: symbol lookup error: <QtPath/plugins/designer/libNewPlugin.so: undefined symbol: _ZN12ToggleSwitchC1EP7QWidget

How could I solve this issue?
My setup: Linux, Qt version 5.13 and QtCreator built with this Qt version.
Thank for an answers in advance!

[Texture]

Problem has be solved by adding ToggleSwitch source/header files to the new widget .pro file.
So the question now: is there some more common and elegant way to do this?

[jsulm]

@Texture You can make a lib from your ToggleSwitch and link your app against it

[Texture]

@jsulm could I link ToggleSwitch lib with another custom widget to do it more "logical"?

[jsulm]

@Texture You can put several widgets into one lib.

[Texture]

@jsulm I have not thought in this way :) Sounds good, so I will give a try, thank you. Separate linking is working well.