[Qt-creator] Core::EditorManagerPlaceHolder::current() method replacement in Qt Creator 3.0

[Xiaofeng Wu]

I am developing a Qt Creator plugin. This plugin shows currently opened
files as a QTabWidget on top of the editor pane. In Qt Creator 2.8, the
code works like the following,
Core::EditorManagerPlaceHolder* holder =
Core::EditorManagerPlaceHolder::current();
holder->layout()->addWidget(myTabWidget);

Here is the screen shot for the plugin running in Qt Creator 2.8

[image: Inline image 1]

However, in Qt Creator 3.0, the method
Core::EditorManagerPlaceHolder::current() no longer exists. In this
situation how am I able to put the QTabWidget on the top the editor window
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