EXtend functionality of QListWidget by making a plugin and use it in designer?

[wysota]

dateViewList:: dateViewList(QWidget *parent  ){}

dateViewList:: dateViewList(QWidget *parent  ){}

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You're not calling the base class (QListWidget) constructor.

Should be:

dateViewList:: dateViewList(QWidget *parent  ) : QListWidget(parent){}

dateViewList:: dateViewList(QWidget *parent  ) : QListWidget(parent){}

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