Review Request 119119: bugfix: 332596 - crash when exiting unfinished practice

[Andreas Xavier]

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https://git.reviewboard.kde.org/r/119119/
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Review request for KDE Edu.


Bugs: 332596
    http://bugs.kde.org/show_bug.cgi?id=332596


Repository: parley


Description
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Problem: The bug was that if the qstyled KLineEdit answerEdit held focus when the WrittenPracticeWidget was deleted, then a focus event passed to the deleted KLineEdit would be passed to the QStyleSheet and return an invalid pointer to an already deleted QStyle.
    
Fix: This patch sets the focus to helpLabel before the object is deleted. It does this by calling modeWidgetDestroyed(), which calls objectDestroyed() before the focus changing event will be invalid. 


Diffs
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  src/parleymainwindow.cpp 7c688a1 
  src/practice/abstractwidget.h e9ef394 
  src/practice/guifrontend.h 60e6fdc 
  src/practice/guifrontend.cpp 99fc015 
  src/practice/practicemainwindow.cpp 31349aa 
  src/practice/writtenpracticewidget.h 9b25987 
  src/practice/writtenpracticewidget.cpp f20ac6d 

Diff: https://git.reviewboard.kde.org/r/119119/diff/


Testing
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Replicated the GUI conditions of the bug by hand, before and after the fix.


Thanks,

Andreas Xavier

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