clipboard contents retention

gsparks2 · 09-03-2014, 08:18 AM

I am using Calibre 2.1

I frequently copy table of contents information from the text of anthologies and short fiction collections and paste them into the metadata for the book.

I open the ebook with the Calibre reader.
I select the text and either Control-C or right click-copy the selected text.
If I then open the Edit Metadata dialog for the book while the ebook is open in the reader, I am able to paste.
If I close the ebook viewer before pasting into the metadata dialog, the information in the clipboard has disappeared.

I don't recall this happening before with 1.4x.

Is this a feature of Qt5 or is it something that can be changed to have the clipboard not be cleared when closing the Calibre reader?

Thanks!

kovidgoyal · 09-03-2014, 09:33 AM

It's a Qt 5 thing, you will just have to close the viewer after you paste.

theducks · 09-03-2014, 09:39 AM

This kind of sort of action has been normal for a long-long time and I guess I just trained myself to paste before closing/deleting.

Drag and drop books into Metadata edit box: Close/Next Book BEFORE deleting/moving source book file in the OS.

Viewer clipboard (as you noticed): must use before closing the viewer.

kovidgoyal · 09-03-2014, 09:47 AM

It's actually system dependent. On some systems it works and some some it doesn't. I looked at the Qt sourcecode and it actually contains code to try to have the windows clipboard retain data even after the application is quit, but apparently it only works on some systems and not others.

theducks · 09-03-2014, 10:23 AM

Quote:

Originally Posted by kovidgoyal

It's actually system dependent. On some systems it works and some some it doesn't. I looked at the Qt sourcecode and it actually contains code to try to have the windows clipboard retain data even after the application is quit, but apparently it only works on some systems and not others.

It is amazing you have any hair left after all these system quirks.

kovidgoyal · 09-03-2014, 12:10 PM

Indeed, I was careful to cut my hair very short before releasing calibre 2.0

gsparks2 · 09-03-2014, 01:20 PM

Thanks for the replies.

BetterRed · 09-03-2014, 06:39 PM

Quote:

Originally Posted by kovidgoyal

Indeed, I was careful to cut my hair very short before releasing calibre 2.0

- the only other Windows scenario I know where the content of the clipboard is not retained when the source program is exited is with MS Word, and only if you copy a large amount. But you do get this, "You placed a large amount of text in the Clipboard. Do you want this data to be available to other applications after you quit Word?" Options are Yes/No/Cancel.

Maybe something changed clipboard wise with Win8, and that's what Qt is addressing.

I don't have this problem, I do use some 'mature' clipboard extender gadgets. I have to wonder whether other such gadgets are the problem here. A lot of 'contemporary' gadgets look pretty, but they are often selfish in their behaviour and interfere with 'normal' operations. So maybe this problem is due to a 3rd party program - a'la the right click problem.

BR

AnotherCat · 09-03-2014, 06:59 PM

Quote:

Originally Posted by BetterRed

...Maybe something changed clipboard wise with Win8, and that's what Qt is addressing...

Nothing has changed in general clip board behaviour over many applications with Win 8 as far as I have ever noticed.

That said, it is now coming up to 2 years since I had much exposure to legacy

Windows versions. However, I would have noticed in the early days I would have thought.

In any event, I have just tested on one Win 8.1 machine and the clipboard empties on that when Calibre Viewer is closed too, just as the OP describes. It is not a problem for me in any way at all though so I am just mentioning, not looking to any change to that behaviour.

BetterRed · 09-03-2014, 07:54 PM

Quote:

Originally Posted by AnotherCat

Nothing has changed in general clip board behaviour over many applications with Win 8 as far as I have ever noticed.

That said, it is now coming up to 2 years since I had much exposure to legacy

Windows versions. However, I would have noticed in the early days I would have thought.

In any event, I have just tested on one Win 8.1 machine and the clipboard empties on that when Calibre Viewer is closed too, just as the OP describes. It is not a problem for me in any way at all though so I am just mentioning, not looking to any change to that behaviour.

@AnotherCat - it would have surprised me if clipboard had changed Win 8, I doubt its changed since Win 2.0

I turned off my clipboard gadgets, I get the problem with the Viewer and the Editor in 2.1 on Win 7, I don't get the problem with 1.48. And I don't get the problem with Sigil CV or BV. So it does seem to be peculiar to Calibre V2.1

BR

kovidgoyal · 09-03-2014, 11:07 PM

This is probably caused by the fix for this bug: https://bugreports.qt-project.org/browse/QTBUG-36958

And it doesn't affect Sigil because Sigil doesn't use a new enough version of Qt 5.

kovidgoyal · 09-03-2014, 11:27 PM

And here is a workaround for the Qt bug, https://github.com/kovidgoyal/calibr...d1671bee272ea1

gsparks2 · 05-11-2015, 09:42 AM

I had a recurrence of this issue in May 2015 and reported it under Calibre bug 1453535. Kovid could not duplicate it so I investigated my system setup and software.

I run Windows 7 professional, Calibre 2.27 (64 bit) and AVG anti virus 2013.0.3495.

When I deactivate AVG the problem goes away.

09-03-2014, 08:18 AM	#1
gsparks2 Connoisseur Posts: 93 Karma: 886 Join Date: Apr 2005 Device: Moon+ Reader Pro on Samsung Galaxy S7 Edge International version	clipboard contents retention I am using Calibre 2.1 I frequently copy table of contents information from the text of anthologies and short fiction collections and paste them into the metadata for the book. I open the ebook with the Calibre reader. I select the text and either Control-C or right click-copy the selected text. If I then open the Edit Metadata dialog for the book while the ebook is open in the reader, I am able to paste. If I close the ebook viewer before pasting into the metadata dialog, the information in the clipboard has disappeared. I don't recall this happening before with 1.4x. Is this a feature of Qt5 or is it something that can be changed to have the clipboard not be cleared when closing the Calibre reader? Thanks!

09-03-2014, 11:27 PM	#12
kovidgoyal creator of calibre Posts: 43,844 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	And here is a workaround for the Qt bug, https://github.com/kovidgoyal/calibr...d1671bee272ea1 Last edited by kovidgoyal; 09-03-2014 at 11:38 PM.

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09-03-2014, 09:33 AM	#2
kovidgoyal creator of calibre Posts: 43,844 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It's a Qt 5 thing, you will just have to close the viewer after you paste.

09-03-2014, 09:39 AM	#3
theducks Well trained by Cats Posts: 29,785 Karma: 54830978 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	This kind of sort of action has been normal for a long-long time and I guess I just trained myself to paste before closing/deleting. Drag and drop books into Metadata edit box: Close/Next Book BEFORE deleting/moving source book file in the OS. Viewer clipboard (as you noticed): must use before closing the viewer.

09-03-2014, 09:47 AM	#4
kovidgoyal creator of calibre Posts: 43,844 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It's actually system dependent. On some systems it works and some some it doesn't. I looked at the Qt sourcecode and it actually contains code to try to have the windows clipboard retain data even after the application is quit, but apparently it only works on some systems and not others.

09-03-2014, 12:10 PM	#6
kovidgoyal creator of calibre Posts: 43,844 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Indeed, I was careful to cut my hair very short before releasing calibre 2.0

09-03-2014, 01:20 PM	#7
gsparks2 Connoisseur Posts: 93 Karma: 886 Join Date: Apr 2005 Device: Moon+ Reader Pro on Samsung Galaxy S7 Edge International version	Thanks for the replies.

09-03-2014, 11:07 PM	#11
kovidgoyal creator of calibre Posts: 43,844 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	This is probably caused by the fix for this bug: https://bugreports.qt-project.org/browse/QTBUG-36958 And it doesn't affect Sigil because Sigil doesn't use a new enough version of Qt 5.

05-11-2015, 09:42 AM	#13
gsparks2 Connoisseur Posts: 93 Karma: 886 Join Date: Apr 2005 Device: Moon+ Reader Pro on Samsung Galaxy S7 Edge International version	I had a recurrence of this issue in May 2015 and reported it under Calibre bug 1453535. Kovid could not duplicate it so I investigated my system setup and software. I run Windows 7 professional, Calibre 2.27 (64 bit) and AVG anti virus 2013.0.3495. When I deactivate AVG the problem goes away.

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