Review Request 109339: Delete the old konsoleWidget when loading a new project.

[Tianyu Zhu]

> On March 11, 2013, 9:32 a.m., Giorgos Tsiapaliokas wrote:
> > plasmate/mainwindow.cpp, line 858
> > <http://git.reviewboard.kde.org/r/109339/diff/1/?file=117777#file117777line858>
> >
> >     it should be
> >     
> >     delete m_konsoleWidget;
> >     m_konsoleWidget = 0;
> >     
> >     after the delete the pointer is dangling,
> >     of course since createKonsoleFor returns
> >     either 0 or a valid pointer, we don't have an issue, *but* if in the future the code changes we might have a dangling pointer and this isn't good :)
> >     
> >     
> >
> 
> Tianyu Zhu wrote:
>     I'm simply following the same pattern as the lines of code after it that initialize m_previwerwidget:
>     
>     // initialize previewer
>     delete m_previewerWidget;
>     m_previewerWidget = createPreviewerFor(previewerType);
>     
>     If we want to fix that the pointer is not being set to 0, then I believe we should make a earnest effort to find and fix all these cases.
>     
>     Alternatively, we can use some sort of smart pointer with unique ownership semantics that will automatically delete and nullify the pointer if it is being reset.
>     
>     Either way, I believe that change should happen in another patch, since it is a separate problem from the bug being fixed here.

I would just like to point out that QScopedPointer is a smart pointer meeting these requirements.


- Tianyu


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On March 7, 2013, 2:10 p.m., Tianyu Zhu wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/109339/
> -----------------------------------------------------------
> 
> (Updated March 7, 2013, 2:10 p.m.)
> 
> 
> Review request for Plasma.
> 
> 
> Description
> -------
> 
> If the old konsoleWidget is not deleted when loading a new project, it shows up along with a new one in the project view.
> This also fixes a memory leak.
> 
> 
> This addresses bug https://bugs.kde.org/show_bug.cgi?id=316276.
>     http://bugs.kde.org/show_bug.cgi?id=https://bugs.kde.org/show_bug.cgi?id=316276
> 
> 
> Diffs
> -----
> 
>   plasmate/mainwindow.cpp 13234ec 
> 
> Diff: http://git.reviewboard.kde.org/r/109339/diff/
> 
> 
> Testing
> -------
> 
> It works on my machine: Thinkpad T520, Kubuntu 12.10, KDE 4.10.1
> 
> 
> Thanks,
> 
> Tianyu Zhu
> 
>

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