qt: Use window() instead of obsolete topLevelWidget() #14801

1. 
   hebasto commented at 9:48 AM on November 25, 2018: member

   QWidget::topLevelWidget() is obsolete since at least Qt 4.8.

   Refs:

   • https://doc-snapshots.qt.io/4.8/qwidget-obsolete.html#topLevelWidget
   • https://doc.qt.io/qt-5.9/qwidget-obsolete.html#topLevelWidget
2. Use window() instead of obsolete topLevelWidget() 0b4a5786bb
3. fanquake added the label GUI on Nov 25, 2018
4. 
   practicalswift commented at 11:34 PM on November 25, 2018: contributor

   Concept ACK

5. 
   fanquake commented at 12:56 AM on November 26, 2018: member

   utACK 0b4a578

   Looking at qwidget.h in depends (5.9.6):

   QWidget *window() const;
   QWidget *nativeParentWidget() const;
   inline QWidget *topLevelWidget() const { return window(); }
   

   Also checked that there are no more usages of topLevelWidget in the code base.

6. MarcoFalke added this to the milestone 0.18.0 on Nov 26, 2018
7. MarcoFalke added the label Refactoring on Nov 26, 2018
8. 
   promag commented at 3:06 PM on November 27, 2018: member

   ACK 0b4a578.

9. 
   ken2812221 commented at 8:00 AM on November 30, 2018: contributor

   tACK 0b4a5786bb5442a309c22e534e62ab1082588300

10. laanwj merged this on Dec 9, 2018
11. laanwj closed this on Dec 9, 2018

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Milestone
0.18.0