Custom QTabWidget loses capability to re-adjust size

[remizero]

Hi everyone again.

After researching a lot, and consider and make several tests with the suggestion anda_skoa, I have managed to solve the problem of adjustment that I then had to "crash" area QTabWidget pages.

The answer is somewhat simple and though the programming is inelegant, here is the left in a compressed, if someone has the same problem or something similar.

The solution enables:
1-. "Collapse" the page area of ​​a QTabWidget the minimum level to allow display of the tabs.
2-. "Uncollapse" the page area of ​​restoring the pre QTabWidget "collapse" of the same dimensions.
3-. Resize the tab area via QSplitter.
4-. "Collapse" the page area of ​​a QTabWidget via QSplitter the minimum level to allow display of the tabs.
5-. Even not allow "Uncollapse" via QSplitter.

P.S.1 Something that was me all this research is that when you want to work with changing the size and / or dimensions of a widget, only work with setGeometry, instead of assigning and / or directly modify the values ​​of size, fixedSize and similar, blocking widget functionality as QSplitter convenience to make adjustments when required. Please correct me if I'm wrong.
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P.S.2 Another interesting thing also I discovered in this search is that it would be much better achieve do this in combination QDockWidget and QStackedWidget, but I failed as assign a custom QTabBar to achieve better handling of the widget to insert and to move them to any DockArea convenience.

Thank you for all anda_skoa.