Review Request: Show error message to the user on "Export to PDF" failure

[Gopalakrishna Bhat]

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http://git.reviewboard.kde.org/r/105623/
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Review request for Calligra.


Description
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Currently while exporting PDF we do not check if we are able to create the file at the location or not. This leads to the "Export to PDF" action to fail silently. This patch adds check for that and the user is notified of failure.

Though I could not test in the exact environment as mentioned in bug 291925, what I did was that I created a folder with no write permissions and tried to export PDF to that folder. In my test environment I could see that export failed silently without this patch.


This addresses bug 291925.
    http://bugs.kde.org/show_bug.cgi?id=291925


Diffs
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  krita/ui/kis_print_job.h 387d64b 
  krita/ui/kis_print_job.cpp 4f33472 
  libs/kopageapp/KoPAPrintJob.h 057bb46 
  libs/kopageapp/KoPAPrintJob.cpp ba069c7 
  libs/main/KoMainWindow.cpp 98538a8 
  libs/main/KoPrintJob.h c4fe023 
  libs/main/KoPrintingDialog.h 6f6583f 
  libs/main/KoPrintingDialog.cpp 0952906 

Diff: http://git.reviewboard.kde.org/r/105623/diff/


Testing
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Tested with Words, Stage, Sheets, Plan, Flow and Krita.


Thanks,

Gopalakrishna Bhat

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